Shateesh Battu - Academia.edu (original) (raw)
Papers by Shateesh Battu
International Journal of Hydrogen Energy
Green Chemistry, 2019
A fast, robust and green bioreactor for arsenic sequestration from contaminated water was designe... more A fast, robust and green bioreactor for arsenic sequestration from contaminated water was designed. In the two-tier bioreactor, bacterial arsenite detoxification (1 mM) was carried out followed by precipitation of...
Journal of Physical Chemistry C, Sep 25, 2013
Cyclic voltammetry has been used to investigate the interaction between reduced graphene oxide (r... more Cyclic voltammetry has been used to investigate the interaction between reduced graphene oxide (r-GO) and CdTe quantum dots (Q-CdTe). For that, the composite of Q-CdTe with r-GO (r-GO-CdTe) was prepared by carrying out the reduction of graphene oxide and the synthesis of Q-CdTe simultaneously, in a single bath. r-GO-CdTe was characterized by UV−visible, steady state fluorescence, time-resolved fluorescence, X-ray diffraction (XRD), Raman, and transmission electron microscopy (TEM). Cyclic voltammetry was employed to determine the quasi-particle gap and band edge parameters of Q-CdTe and r-GO-CdTe. The blue shifts in the quasi-particle gap of r-GO-CdTe have been attributed to the strong interaction of graphene with CdTe. These interactions were further verified by time-resolved fluorescence and Raman spectroscopy which suggested strong electronic coupling between Qdots and graphene.
ChemistrySelect, Dec 16, 2016
Transition metal sulphides have been viewed as alternatives to platinum based electrocatalysts fo... more Transition metal sulphides have been viewed as alternatives to platinum based electrocatalysts for HER. Herein, we report the preparation of Ni 3 S 2 in conjunction with Ni in a novel nanosheet morphology and verified its performance for HER. During cyclic polarization, exotic morphological transformation of Ni 3 S 2-Ni from nanosheets to nanodisks has been noted. This change is accompanied with initial increase in over-potential that passed through maxima (~100mV above the starting potential) and decreased to~50mV below the starting value. Enhanced electrocatalytic activity due to the morphological changes from sheets to nanodisks has been attributed to the formation of more number of exposed edge-planes known to promote HER. Kinetic analysis based on Tafel slope displayed by this composite is comparable to that of Pt based catalysts.
Water Research, 2021
Efficient and sustainable removal of phosphate ions from an aqueous solution is of great challeng... more Efficient and sustainable removal of phosphate ions from an aqueous solution is of great challenge. Herein we demonstrated a greener route for phosphate recovery through struvite formation by using bacterial siderophore. This method was efficient for removal of phosphate as low as 1.3 mM with 99% recovery efficiency. The siderophore produced by Pseudomonas taiwanensis R-12-2 act as template for the nucleation of struvite crystals and was found sustainable for recycling the phosphorous efficiently after twenty cycles. The formation of struvite crystals is driven by surrounding pH (9.0) and presence of Mg2+ and NH4+ ions along with PO43- and siderophore which was further validated by computational studies. The morphology of struvite was characterized by scanning electron microscopy, followed by elemental analysis. Furthermore, our results revealed that the siderophore plays an important role in struvite biomineralization. We have successfully demonstrated the phosphate sequestration by using industrial waste samples, as possible application for environmental sustainability and phosphate conservation. For the first time electrochemical super-capacitance performance of the struvite was studied. The specific capacitance value for the struvite was found to be 320 F g-1 at 1.87 A g-1 and retained 92 % capacitance after 250 cycles. The study revealed the potential implications of siderophore for the phosphate recycling and the new mechanism for biomineralization by sequestering into struvite.
Scientific Reports, 2018
Storage of solar radiation is currently accomplished by coupling two separate devices, one that c... more Storage of solar radiation is currently accomplished by coupling two separate devices, one that captures and converts the energy into an electrical impulse (a photovoltaic cell) and another that stores this electrical output (a battery or a supercapacitor electrochemical cell). This configuration however has several challenges that stem from a complex coupled-device architecture and multiple interfaces through which charge transfer has to occur. As such presented here is a scheme whereby solar energy capture and storage have been coupled using a single bi-functional material. Two electroactive semiconductors BiVO4 (n-type) and Co3O4 (p-type) have been separately evaluated for their energy storage capability in the presence and absence of visible radiation. Each of these have the capability to function as a light harvester and also they have faradaic capability. An unprecedented aspect has been observed in that upon photo-illumination of either of these semiconductors, in situ charge...
Green Chemistry, 2019
A fast, robust and green bioreactor for arsenic sequestration from contaminated water was designe... more A fast, robust and green bioreactor for arsenic sequestration from contaminated water was designed. In the two-tier bioreactor, bacterial arsenite detoxification (1 mM) was carried out followed by precipitation of...
Analytical Chemistry, 2018
We illustrate that the extent of hydration and consequently the heat of hydration of alkali metal... more We illustrate that the extent of hydration and consequently the heat of hydration of alkali metal ions can be utilized to control their insertion/deinsertion chemistry in a redox active metal coordination polymer framework (CPF) electrode. The formal redox potential of CPF electrode for cation intercalation is inversely correlated to hydrated ionic radii, with clear distinction between the intercalation of ions across alkali metal series. This leads to non-invasive identification and differentiation of cations in the alkali metal series by utilizing a single sensing platform.
ChemistrySelect, 2016
Transition metal sulphides have been viewed as alternatives to platinum based electrocatalysts fo... more Transition metal sulphides have been viewed as alternatives to platinum based electrocatalysts for HER. Herein, we report the preparation of Ni3S2 in conjunction with Ni in a novel nanosheet morphology and verified its performance for HER. During cyclic polarization, exotic morphological transformation of Ni3S2‐Ni from nanosheets to nanodisks has been noted. This change is accompanied with initial increase in over‐potential that passed through maxima (∼ 100mV above the starting potential) and decreased to ∼ 50mV below the starting value. Enhanced electrocatalytic activity due to the morphological changes from sheets to nanodisks has been attributed to the formation of more number of exposed edge‐planes known to promote HER. Kinetic analysis based on Tafel slope displayed by this composite is comparable to that of Pt based catalysts.
Scientific Reports, 2016
We report the optimized synthesis and electrochemical characterization of a composite of few-laye... more We report the optimized synthesis and electrochemical characterization of a composite of few-layered nanostructured MoS2 along with an electroactive metal oxide BiVO4. In comparison to pristine BiVO4, and a composite of graphene/BiVO4, the MoS2/BiVO4 nanocomposite provides impressive values of charge storage with longer discharge times and improved cycling stability. Specific capacitance values of 610 Fg−1 (170 mAhg−1) at 1 Ag−1 and 166 Fg−1 (46 mAhg−1) at 10 Ag−1 were obtained for just 2.5 wt% MoS2 loaded BiVO4. The results suggest that the explicitly synthesized small lateral-dimensioned MoS2 particles provide a notable capacitive component that helps augment the specific capacitance. We discuss the optimized synthesis of monoclinic BiVO4, and few-layered nanostructured MoS2. We report the discharge capacities and cycling performance of the MoS2/BiVO4 nanocomposite using an aqueous electrolyte. The data obtained shows the MoS2/BiVO4 nanocomposite to be a promising candidate for su...
Electrochimica Acta, 2016
Abstract Electrodics of hydrogen evolution reaction (HER) has been studied for N-doped graphene o... more Abstract Electrodics of hydrogen evolution reaction (HER) has been studied for N-doped graphene oxide (N-GO) based electrodes with varied N-content; from graphene oxide (0% Nitrogen) to graphitic carbon nitride (GCN, 66.6% Nitrogen). In between compositions have been prepared by co-heating GO with melamine. These were characterized in detail by XRD, Raman, FESEM, EDAX, XPS, FTIR and Thermal analysis. Electrodics of HER have been studied by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and forced convection hydrodynamic methods using Rotating Disc Electrode (RDE). The overpotential for the HER have been noted to decease systematically with an increase in the N-content and attend minima at −0.21V vs. RHE for GCN. Tafel plot based on exchange current density (J o ) have been increased in sigmoidal fashion with N-content and saturated for GCN at ∼0.1 mA cm −2 . This value is almost double comparable to the one reported for 3D-MoS 2 ; the best non-platinum catalyst known for HER, to date. The standard rate constants (k°) as a function of composition have been estimated from Koutecky-Levich plots. These values have been increased systematically with increase in the N-content from ∼10 −5 cm s −1 for GO to more than 10 −3 cm s −1 in case of GCN.
RSC Advances, 2016
Herein, we report the field emission properties of NiFe2O4/reduced graphene oxide/carbon nanotube... more Herein, we report the field emission properties of NiFe2O4/reduced graphene oxide/carbon nanotubes (NGC) and compared them with the field emission properties of NiFe2O4/carbon nanotubes (NC) and NiFe2O4/reduced graphene oxide (NG).
Journal of Physics D: Applied Physics, 2015
ABSTRACT Graphene oxide (GO) synthesized from a modified Hummer’s method was reduced (referred, r... more ABSTRACT Graphene oxide (GO) synthesized from a modified Hummer’s method was reduced (referred, rGO) by using 100 MeV Au ion species and its response to the sense H2O2 was investigated. The changes in the atomic composition and structural properties of rGO after irradiation were studied using x-ray diffraction, Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy. These results suggested that the removal of the oxygen-containing functional groups and the improvement of the electrochemical performance of reduced graphene oxide (rGO) after ion irradiation. Raman spectroscopic results revealed the increase in the disorder parameter (ID/IG) after Au ion irradiation and also the formation of a large number of small sp2 domains due to the electronic energy loss of ion beam. The resultant rGO was investigated for H2O2 sensing using electrochemical techniques and it showed a good response.
Free Radicals and Antioxidants, 2015
Introduction: Flavonoid Quercetin is a major constituent of fruits and vegetables which naturally... more Introduction: Flavonoid Quercetin is a major constituent of fruits and vegetables which naturally exists in the form of its glycosides, foremost as C3 glycosides. Three Quercetin glycosides namely quercitrin, quercetin 3-β-D-glucoside and quercetin 3-O-(6"-O-malonyl)-β-D-glucoside, differing at their C3 glycosylation were explored for their antioxidant properties and were compared to the parent quercetin. Methods: Free radical scavenging ability of quercetin glycosides was assessed by UV-VIS spectrophotometry, pulse radiolysis and cyclic voltammetry. Their protective effects in Fenton radical induced DNA strand breaks and mitigating oxidative stress in subcellular organelles such as mitochondria were also examined. Results: Unlike earlier reports we found that C3 glycosides of quercetin exhibited better free radical scavenging in cell free environment. These glycosides effectively protected pBR322 DNA against Fenton radical induced-DNA strand breaks and this could be attributed to their interaction with 2 deoxy guanosine base transient. However, amongst these glycosides, Quercetin 3-O-(6"-O-malonyl)-β-D-glucoside which exhibited excellent antioxidant ability in cell-free environment, could not effectively protect mitochondria from lipid peroxidation but conferred protection against protein sulphydryl depletion at lower concentrations. Conclusion: All quercetin glycosides exhibited excellent antioxidant activities in cell free environment but did not exert comparable protective effects in biological systems. Varied responses of these derivatives can be attributed to their C3 glycosylation and the derivatizations at C3 sugars.
RSC Adv., 2014
In this report, we have systematically investigated the effect of SWCNTs on the electrochemical p... more In this report, we have systematically investigated the effect of SWCNTs on the electrochemical performance of BiVO4: a material not studied thus far for energy storage.
The Journal of Physical Chemistry C, 2013
Cyclic voltammetry has been used to investigate the interaction between reduced graphene oxide (r... more Cyclic voltammetry has been used to investigate the interaction between reduced graphene oxide (r-GO) and CdTe quantum dots (Q-CdTe). For that, the composite of Q-CdTe with r-GO (r-GO-CdTe) was prepared by carrying out the reduction of graphene oxide and the synthesis of Q-CdTe simultaneously, in a single bath. r-GO-CdTe was characterized by UV−visible, steady state fluorescence, time-resolved fluorescence, X-ray diffraction (XRD), Raman, and transmission electron microscopy (TEM). Cyclic voltammetry was employed to determine the quasi-particle gap and band edge parameters of Q-CdTe and r-GO-CdTe. The blue shifts in the quasi-particle gap of r-GO-CdTe have been attributed to the strong interaction of graphene with CdTe. These interactions were further verified by time-resolved fluorescence and Raman spectroscopy which suggested strong electronic coupling between Qdots and graphene.
ACS Sustainable Chemistry & Engineering, 2018
Synthesis of organic molecules by utilizing the principles of electrochemistry satisfies 9 out of... more Synthesis of organic molecules by utilizing the principles of electrochemistry satisfies 9 out of the 12 postulates of green chemistry, conferring electrochemical synthetic methodologies with clean, safe and green tags. However, electro-organic synthesis is a heterogeneous interfacial reaction demanding significant driving force in terms of voltage or current. Here we demonstrate an unusual route for electro-organic synthesis during electricity generation in a battery, where the positive half-cell is designed to function as an organic reactor generating useful chemicals and fuels during power production. The proposed electro-organic synthesizer Zn battery couples power production with the synthesis of extremely useful chemicals such as aromatic amines and fuel such as alcohols
International Journal of Hydrogen Energy
Green Chemistry, 2019
A fast, robust and green bioreactor for arsenic sequestration from contaminated water was designe... more A fast, robust and green bioreactor for arsenic sequestration from contaminated water was designed. In the two-tier bioreactor, bacterial arsenite detoxification (1 mM) was carried out followed by precipitation of...
Journal of Physical Chemistry C, Sep 25, 2013
Cyclic voltammetry has been used to investigate the interaction between reduced graphene oxide (r... more Cyclic voltammetry has been used to investigate the interaction between reduced graphene oxide (r-GO) and CdTe quantum dots (Q-CdTe). For that, the composite of Q-CdTe with r-GO (r-GO-CdTe) was prepared by carrying out the reduction of graphene oxide and the synthesis of Q-CdTe simultaneously, in a single bath. r-GO-CdTe was characterized by UV−visible, steady state fluorescence, time-resolved fluorescence, X-ray diffraction (XRD), Raman, and transmission electron microscopy (TEM). Cyclic voltammetry was employed to determine the quasi-particle gap and band edge parameters of Q-CdTe and r-GO-CdTe. The blue shifts in the quasi-particle gap of r-GO-CdTe have been attributed to the strong interaction of graphene with CdTe. These interactions were further verified by time-resolved fluorescence and Raman spectroscopy which suggested strong electronic coupling between Qdots and graphene.
ChemistrySelect, Dec 16, 2016
Transition metal sulphides have been viewed as alternatives to platinum based electrocatalysts fo... more Transition metal sulphides have been viewed as alternatives to platinum based electrocatalysts for HER. Herein, we report the preparation of Ni 3 S 2 in conjunction with Ni in a novel nanosheet morphology and verified its performance for HER. During cyclic polarization, exotic morphological transformation of Ni 3 S 2-Ni from nanosheets to nanodisks has been noted. This change is accompanied with initial increase in over-potential that passed through maxima (~100mV above the starting potential) and decreased to~50mV below the starting value. Enhanced electrocatalytic activity due to the morphological changes from sheets to nanodisks has been attributed to the formation of more number of exposed edge-planes known to promote HER. Kinetic analysis based on Tafel slope displayed by this composite is comparable to that of Pt based catalysts.
Water Research, 2021
Efficient and sustainable removal of phosphate ions from an aqueous solution is of great challeng... more Efficient and sustainable removal of phosphate ions from an aqueous solution is of great challenge. Herein we demonstrated a greener route for phosphate recovery through struvite formation by using bacterial siderophore. This method was efficient for removal of phosphate as low as 1.3 mM with 99% recovery efficiency. The siderophore produced by Pseudomonas taiwanensis R-12-2 act as template for the nucleation of struvite crystals and was found sustainable for recycling the phosphorous efficiently after twenty cycles. The formation of struvite crystals is driven by surrounding pH (9.0) and presence of Mg2+ and NH4+ ions along with PO43- and siderophore which was further validated by computational studies. The morphology of struvite was characterized by scanning electron microscopy, followed by elemental analysis. Furthermore, our results revealed that the siderophore plays an important role in struvite biomineralization. We have successfully demonstrated the phosphate sequestration by using industrial waste samples, as possible application for environmental sustainability and phosphate conservation. For the first time electrochemical super-capacitance performance of the struvite was studied. The specific capacitance value for the struvite was found to be 320 F g-1 at 1.87 A g-1 and retained 92 % capacitance after 250 cycles. The study revealed the potential implications of siderophore for the phosphate recycling and the new mechanism for biomineralization by sequestering into struvite.
Scientific Reports, 2018
Storage of solar radiation is currently accomplished by coupling two separate devices, one that c... more Storage of solar radiation is currently accomplished by coupling two separate devices, one that captures and converts the energy into an electrical impulse (a photovoltaic cell) and another that stores this electrical output (a battery or a supercapacitor electrochemical cell). This configuration however has several challenges that stem from a complex coupled-device architecture and multiple interfaces through which charge transfer has to occur. As such presented here is a scheme whereby solar energy capture and storage have been coupled using a single bi-functional material. Two electroactive semiconductors BiVO4 (n-type) and Co3O4 (p-type) have been separately evaluated for their energy storage capability in the presence and absence of visible radiation. Each of these have the capability to function as a light harvester and also they have faradaic capability. An unprecedented aspect has been observed in that upon photo-illumination of either of these semiconductors, in situ charge...
Green Chemistry, 2019
A fast, robust and green bioreactor for arsenic sequestration from contaminated water was designe... more A fast, robust and green bioreactor for arsenic sequestration from contaminated water was designed. In the two-tier bioreactor, bacterial arsenite detoxification (1 mM) was carried out followed by precipitation of...
Analytical Chemistry, 2018
We illustrate that the extent of hydration and consequently the heat of hydration of alkali metal... more We illustrate that the extent of hydration and consequently the heat of hydration of alkali metal ions can be utilized to control their insertion/deinsertion chemistry in a redox active metal coordination polymer framework (CPF) electrode. The formal redox potential of CPF electrode for cation intercalation is inversely correlated to hydrated ionic radii, with clear distinction between the intercalation of ions across alkali metal series. This leads to non-invasive identification and differentiation of cations in the alkali metal series by utilizing a single sensing platform.
ChemistrySelect, 2016
Transition metal sulphides have been viewed as alternatives to platinum based electrocatalysts fo... more Transition metal sulphides have been viewed as alternatives to platinum based electrocatalysts for HER. Herein, we report the preparation of Ni3S2 in conjunction with Ni in a novel nanosheet morphology and verified its performance for HER. During cyclic polarization, exotic morphological transformation of Ni3S2‐Ni from nanosheets to nanodisks has been noted. This change is accompanied with initial increase in over‐potential that passed through maxima (∼ 100mV above the starting potential) and decreased to ∼ 50mV below the starting value. Enhanced electrocatalytic activity due to the morphological changes from sheets to nanodisks has been attributed to the formation of more number of exposed edge‐planes known to promote HER. Kinetic analysis based on Tafel slope displayed by this composite is comparable to that of Pt based catalysts.
Scientific Reports, 2016
We report the optimized synthesis and electrochemical characterization of a composite of few-laye... more We report the optimized synthesis and electrochemical characterization of a composite of few-layered nanostructured MoS2 along with an electroactive metal oxide BiVO4. In comparison to pristine BiVO4, and a composite of graphene/BiVO4, the MoS2/BiVO4 nanocomposite provides impressive values of charge storage with longer discharge times and improved cycling stability. Specific capacitance values of 610 Fg−1 (170 mAhg−1) at 1 Ag−1 and 166 Fg−1 (46 mAhg−1) at 10 Ag−1 were obtained for just 2.5 wt% MoS2 loaded BiVO4. The results suggest that the explicitly synthesized small lateral-dimensioned MoS2 particles provide a notable capacitive component that helps augment the specific capacitance. We discuss the optimized synthesis of monoclinic BiVO4, and few-layered nanostructured MoS2. We report the discharge capacities and cycling performance of the MoS2/BiVO4 nanocomposite using an aqueous electrolyte. The data obtained shows the MoS2/BiVO4 nanocomposite to be a promising candidate for su...
Electrochimica Acta, 2016
Abstract Electrodics of hydrogen evolution reaction (HER) has been studied for N-doped graphene o... more Abstract Electrodics of hydrogen evolution reaction (HER) has been studied for N-doped graphene oxide (N-GO) based electrodes with varied N-content; from graphene oxide (0% Nitrogen) to graphitic carbon nitride (GCN, 66.6% Nitrogen). In between compositions have been prepared by co-heating GO with melamine. These were characterized in detail by XRD, Raman, FESEM, EDAX, XPS, FTIR and Thermal analysis. Electrodics of HER have been studied by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and forced convection hydrodynamic methods using Rotating Disc Electrode (RDE). The overpotential for the HER have been noted to decease systematically with an increase in the N-content and attend minima at −0.21V vs. RHE for GCN. Tafel plot based on exchange current density (J o ) have been increased in sigmoidal fashion with N-content and saturated for GCN at ∼0.1 mA cm −2 . This value is almost double comparable to the one reported for 3D-MoS 2 ; the best non-platinum catalyst known for HER, to date. The standard rate constants (k°) as a function of composition have been estimated from Koutecky-Levich plots. These values have been increased systematically with increase in the N-content from ∼10 −5 cm s −1 for GO to more than 10 −3 cm s −1 in case of GCN.
RSC Advances, 2016
Herein, we report the field emission properties of NiFe2O4/reduced graphene oxide/carbon nanotube... more Herein, we report the field emission properties of NiFe2O4/reduced graphene oxide/carbon nanotubes (NGC) and compared them with the field emission properties of NiFe2O4/carbon nanotubes (NC) and NiFe2O4/reduced graphene oxide (NG).
Journal of Physics D: Applied Physics, 2015
ABSTRACT Graphene oxide (GO) synthesized from a modified Hummer’s method was reduced (referred, r... more ABSTRACT Graphene oxide (GO) synthesized from a modified Hummer’s method was reduced (referred, rGO) by using 100 MeV Au ion species and its response to the sense H2O2 was investigated. The changes in the atomic composition and structural properties of rGO after irradiation were studied using x-ray diffraction, Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy. These results suggested that the removal of the oxygen-containing functional groups and the improvement of the electrochemical performance of reduced graphene oxide (rGO) after ion irradiation. Raman spectroscopic results revealed the increase in the disorder parameter (ID/IG) after Au ion irradiation and also the formation of a large number of small sp2 domains due to the electronic energy loss of ion beam. The resultant rGO was investigated for H2O2 sensing using electrochemical techniques and it showed a good response.
Free Radicals and Antioxidants, 2015
Introduction: Flavonoid Quercetin is a major constituent of fruits and vegetables which naturally... more Introduction: Flavonoid Quercetin is a major constituent of fruits and vegetables which naturally exists in the form of its glycosides, foremost as C3 glycosides. Three Quercetin glycosides namely quercitrin, quercetin 3-β-D-glucoside and quercetin 3-O-(6"-O-malonyl)-β-D-glucoside, differing at their C3 glycosylation were explored for their antioxidant properties and were compared to the parent quercetin. Methods: Free radical scavenging ability of quercetin glycosides was assessed by UV-VIS spectrophotometry, pulse radiolysis and cyclic voltammetry. Their protective effects in Fenton radical induced DNA strand breaks and mitigating oxidative stress in subcellular organelles such as mitochondria were also examined. Results: Unlike earlier reports we found that C3 glycosides of quercetin exhibited better free radical scavenging in cell free environment. These glycosides effectively protected pBR322 DNA against Fenton radical induced-DNA strand breaks and this could be attributed to their interaction with 2 deoxy guanosine base transient. However, amongst these glycosides, Quercetin 3-O-(6"-O-malonyl)-β-D-glucoside which exhibited excellent antioxidant ability in cell-free environment, could not effectively protect mitochondria from lipid peroxidation but conferred protection against protein sulphydryl depletion at lower concentrations. Conclusion: All quercetin glycosides exhibited excellent antioxidant activities in cell free environment but did not exert comparable protective effects in biological systems. Varied responses of these derivatives can be attributed to their C3 glycosylation and the derivatizations at C3 sugars.
RSC Adv., 2014
In this report, we have systematically investigated the effect of SWCNTs on the electrochemical p... more In this report, we have systematically investigated the effect of SWCNTs on the electrochemical performance of BiVO4: a material not studied thus far for energy storage.
The Journal of Physical Chemistry C, 2013
Cyclic voltammetry has been used to investigate the interaction between reduced graphene oxide (r... more Cyclic voltammetry has been used to investigate the interaction between reduced graphene oxide (r-GO) and CdTe quantum dots (Q-CdTe). For that, the composite of Q-CdTe with r-GO (r-GO-CdTe) was prepared by carrying out the reduction of graphene oxide and the synthesis of Q-CdTe simultaneously, in a single bath. r-GO-CdTe was characterized by UV−visible, steady state fluorescence, time-resolved fluorescence, X-ray diffraction (XRD), Raman, and transmission electron microscopy (TEM). Cyclic voltammetry was employed to determine the quasi-particle gap and band edge parameters of Q-CdTe and r-GO-CdTe. The blue shifts in the quasi-particle gap of r-GO-CdTe have been attributed to the strong interaction of graphene with CdTe. These interactions were further verified by time-resolved fluorescence and Raman spectroscopy which suggested strong electronic coupling between Qdots and graphene.
ACS Sustainable Chemistry & Engineering, 2018
Synthesis of organic molecules by utilizing the principles of electrochemistry satisfies 9 out of... more Synthesis of organic molecules by utilizing the principles of electrochemistry satisfies 9 out of the 12 postulates of green chemistry, conferring electrochemical synthetic methodologies with clean, safe and green tags. However, electro-organic synthesis is a heterogeneous interfacial reaction demanding significant driving force in terms of voltage or current. Here we demonstrate an unusual route for electro-organic synthesis during electricity generation in a battery, where the positive half-cell is designed to function as an organic reactor generating useful chemicals and fuels during power production. The proposed electro-organic synthesizer Zn battery couples power production with the synthesis of extremely useful chemicals such as aromatic amines and fuel such as alcohols