Muzaffar Boda - Academia.edu (original) (raw)
Papers by Muzaffar Boda
The Innovation materials, 2024
International journal of hydrogen energy, Apr 1, 2024
Journal of The Electrochemical Society
Alkaline water electrolysis is a low-cost method for large-scale and sustainable hydrogen product... more Alkaline water electrolysis is a low-cost method for large-scale and sustainable hydrogen production. However, slow kinetics of water dissociation in alkaline electrolyte limits the long-term stability and high-activity of the catalyst for hydrogen evolution reaction (HER). In this work, non-noble metal based HER catalyst NiF3-NiF2/HNF (hydrophilic nickel foam), synthesized by electrodeposition and fluorination on nickel foam (NF), shows an excellent control over both factors. The catalyst exhibits the 3D porous structure, in which super-hydrophilicity caused by HNF and local charge redistribution by the interaction between NiF2 and NiF3, makes the catalyst to present relatively a good performance for HER. An overpotential of only 50 mV and 177 mV is required to achieve a current density of 10 mA cm-2 and 100 mA cm-2, respectively. Under chronoamperometric test, current density of 10 mA cm-2 remains constant for 48 hours, revealing the long-term stability of catalyst. Overall, this ...
Journal of the American Ceramic Society, Feb 13, 2023
The materials showing significant photostrictive effect under visible light are of great interest... more The materials showing significant photostrictive effect under visible light are of great interest for the development of advanced micro‐optomechanical systems (MOMS). Till date, ferroelectrics have remained the most widely investigated materials for photostriction, but due to wide bandgap their efficiency remains poor in visible light. Herein, magnesium orthovandate (Mg3V2O8) ceramics, showing a bandgap of 2.43 eV, is demonstrated for significant photostrictive efficiency (η) under visible light. In the illumination of laser 655 nm, it shows η = 1.5 × 10−11 m3/W, the highest efficiency ever reported for any ceramic under visible light, and under laser405 nm, shows η = 1.0 × 10−11 m3/W, the efficiency higher than most of the reported materials in similar illumination conditions. The in situ X‐ray diffraction patterns collected under external laser illumination in conjunction with power dependent Raman spectroscopy indicates that the photostriction of Mg3V2O8 ceramics is attributed to light induced distortion of its VO4 tetrahedrons and MgO6 octahedrons. Whilst, comparative analysis of Raman modes identified experimentally and modes calculated by density functional theory reveals that the light‐triggered electron–phonon resonating interactions and light‐induced phase transition are the most likely origin of large polyhedral distortions and hence higher value of η at specific light intensity of lasers 655 and 405 nm, respectively. These results show considerable advantage of Mg3V2O8 ceramics for MOMS and other light‐driven applications.
Journal of the American Ceramic Society
The materials showing significant photostrictive effect under visible light are of great interest... more The materials showing significant photostrictive effect under visible light are of great interest for the development of advanced micro‐optomechanical systems (MOMS). Till date, ferroelectrics have remained the most widely investigated materials for photostriction, but due to wide bandgap their efficiency remains poor in visible light. Herein, magnesium orthovandate (Mg3V2O8) ceramics, showing a bandgap of 2.43 eV, is demonstrated for significant photostrictive efficiency (η) under visible light. In the illumination of laser 655 nm, it shows η = 1.5 × 10−11 m3/W, the highest efficiency ever reported for any ceramic under visible light, and under laser405 nm, shows η = 1.0 × 10−11 m3/W, the efficiency higher than most of the reported materials in similar illumination conditions. The in situ X‐ray diffraction patterns collected under external laser illumination in conjunction with power dependent Raman spectroscopy indicates that the photostriction of Mg3V2O8 ceramics is attributed t...
Materials Research Express
In this study, branched TiO2 nanotube array were fabricated through electrochemical anodization p... more In this study, branched TiO2 nanotube array were fabricated through electrochemical anodization process at constant voltage using third generation electrolyte. On account of morphological advantage, these nanotubes shows significant enhancement in photo-electrochemical property than compact or conventional titania nanotube array. However, their photo-electrochemical efficiency intensifies on coating with ZnO micro-crystals. ZnO coated branched TiO2 nanotube array shows a photocurrent density of 27.8 mA cm−2 which is 1.55 times the photocurrent density (17.2 mA cm−2) shown by bare branched titania nanotubes. The significant enhancement in photocurrent density shown by the resulting ZnO/TiO2 hybrid structure is attributed to suppression in electron–hole recombination phenomenon by offering smooth pathway to photo generated excitons on account of staggered band edge positions in individual semiconductors.
Journal of Materials Chemistry A
Electrolytic cells combining silver oxidation with hydrogen reduction were designed to generate H... more Electrolytic cells combining silver oxidation with hydrogen reduction were designed to generate H2 and size-selective AgCl in an energy efficient manner.
Advanced Engineering Materials
Materials Today Energy, 2022
Materials Research Express, 2019
Theoretical development of anodized TiO2 nanotube array was made by using high field conduction t... more Theoretical development of anodized TiO2 nanotube array was made by using high field conduction theory. The theory reveals that the high electric field (>106 V cm−1) due to low resistance offered by titanium electrode in the beginning of anodization results the rapid formation of compact TiO2 layer defined by pilling-bedworth ratio (PBR). The increasing thickness in the oxidized layer proportionally develops the stress in the oxide layer which results micro-cracks in the TiO2 layer to minimize the energy strain by increasing the surface area. These cracks steer the formation of TiO2 nanotube array throughout the anodization process. The presence of fluoride ions in the as prepared electrolyte etches at these preferred sites (micro-cracks) and leads the formation of bowl like ordered foot prints. The etching in the oxide layer undergoes continuously until an equilibrium is reached between electrochemically assisted oxidation and chemically assisted dissolution process. Furthermore, on account of frequent use of TiO2 nanotube array in light harnessing applications, the theoretical dynamics of photo-induced charge carriers were also studied using carrier continuity equation under quasi state condition.
Materials Research Express, 2017
Ordered compact TiO2 nanotubes have been fabricated by using third generation electrolyte on empl... more Ordered compact TiO2 nanotubes have been fabricated by using third generation electrolyte on employing the electrochemical anodisation technique. The titania nanotube growth is intiated by etching the oxide layer due to fluoride ions in the prepared electrolyte therby results the pore formation which continue to deepen in the oxide layer by maintaining the atmosphere of high and low pH at the mouth and bottom of the titania nanotubes, respectively. Using field emission scanning electron microscope (FESEM) and anodization current time spectra, detailed fabrication mechanism of compact TiO2 nanotubes have been explained. Moreover, the resulting TiO2 nanotubes were studied for light absorption using diffuse reflectance spectroscopy and photo-eletrochemical property using electrochemical analyzer. The absorption and photo-electrochemical spectra of the resulting titania nanotubes show the band gap of ~3.2 eV and photocurrent density of ~4.85 mA cm−2 respectively. The elemental composition and phase purity of the finally prepared compact TiO2 nanotubes (anatase) were confirmed by EDAX coupled with FESEM and x-ray diffractogram, respectively.
Journal of Materials Chemistry A
The significance of ferroelectric and ferroelastic materials physico-chemistry is summarized and ... more The significance of ferroelectric and ferroelastic materials physico-chemistry is summarized and detailed for various photocatalytic reactions, followed by an outlook on future advancements.
Biosynthesized Nanomaterials
ACS Sustainable Chemistry & Engineering
The Innovation materials, 2024
International journal of hydrogen energy, Apr 1, 2024
Journal of The Electrochemical Society
Alkaline water electrolysis is a low-cost method for large-scale and sustainable hydrogen product... more Alkaline water electrolysis is a low-cost method for large-scale and sustainable hydrogen production. However, slow kinetics of water dissociation in alkaline electrolyte limits the long-term stability and high-activity of the catalyst for hydrogen evolution reaction (HER). In this work, non-noble metal based HER catalyst NiF3-NiF2/HNF (hydrophilic nickel foam), synthesized by electrodeposition and fluorination on nickel foam (NF), shows an excellent control over both factors. The catalyst exhibits the 3D porous structure, in which super-hydrophilicity caused by HNF and local charge redistribution by the interaction between NiF2 and NiF3, makes the catalyst to present relatively a good performance for HER. An overpotential of only 50 mV and 177 mV is required to achieve a current density of 10 mA cm-2 and 100 mA cm-2, respectively. Under chronoamperometric test, current density of 10 mA cm-2 remains constant for 48 hours, revealing the long-term stability of catalyst. Overall, this ...
Journal of the American Ceramic Society, Feb 13, 2023
The materials showing significant photostrictive effect under visible light are of great interest... more The materials showing significant photostrictive effect under visible light are of great interest for the development of advanced micro‐optomechanical systems (MOMS). Till date, ferroelectrics have remained the most widely investigated materials for photostriction, but due to wide bandgap their efficiency remains poor in visible light. Herein, magnesium orthovandate (Mg3V2O8) ceramics, showing a bandgap of 2.43 eV, is demonstrated for significant photostrictive efficiency (η) under visible light. In the illumination of laser 655 nm, it shows η = 1.5 × 10−11 m3/W, the highest efficiency ever reported for any ceramic under visible light, and under laser405 nm, shows η = 1.0 × 10−11 m3/W, the efficiency higher than most of the reported materials in similar illumination conditions. The in situ X‐ray diffraction patterns collected under external laser illumination in conjunction with power dependent Raman spectroscopy indicates that the photostriction of Mg3V2O8 ceramics is attributed to light induced distortion of its VO4 tetrahedrons and MgO6 octahedrons. Whilst, comparative analysis of Raman modes identified experimentally and modes calculated by density functional theory reveals that the light‐triggered electron–phonon resonating interactions and light‐induced phase transition are the most likely origin of large polyhedral distortions and hence higher value of η at specific light intensity of lasers 655 and 405 nm, respectively. These results show considerable advantage of Mg3V2O8 ceramics for MOMS and other light‐driven applications.
Journal of the American Ceramic Society
The materials showing significant photostrictive effect under visible light are of great interest... more The materials showing significant photostrictive effect under visible light are of great interest for the development of advanced micro‐optomechanical systems (MOMS). Till date, ferroelectrics have remained the most widely investigated materials for photostriction, but due to wide bandgap their efficiency remains poor in visible light. Herein, magnesium orthovandate (Mg3V2O8) ceramics, showing a bandgap of 2.43 eV, is demonstrated for significant photostrictive efficiency (η) under visible light. In the illumination of laser 655 nm, it shows η = 1.5 × 10−11 m3/W, the highest efficiency ever reported for any ceramic under visible light, and under laser405 nm, shows η = 1.0 × 10−11 m3/W, the efficiency higher than most of the reported materials in similar illumination conditions. The in situ X‐ray diffraction patterns collected under external laser illumination in conjunction with power dependent Raman spectroscopy indicates that the photostriction of Mg3V2O8 ceramics is attributed t...
Materials Research Express
In this study, branched TiO2 nanotube array were fabricated through electrochemical anodization p... more In this study, branched TiO2 nanotube array were fabricated through electrochemical anodization process at constant voltage using third generation electrolyte. On account of morphological advantage, these nanotubes shows significant enhancement in photo-electrochemical property than compact or conventional titania nanotube array. However, their photo-electrochemical efficiency intensifies on coating with ZnO micro-crystals. ZnO coated branched TiO2 nanotube array shows a photocurrent density of 27.8 mA cm−2 which is 1.55 times the photocurrent density (17.2 mA cm−2) shown by bare branched titania nanotubes. The significant enhancement in photocurrent density shown by the resulting ZnO/TiO2 hybrid structure is attributed to suppression in electron–hole recombination phenomenon by offering smooth pathway to photo generated excitons on account of staggered band edge positions in individual semiconductors.
Journal of Materials Chemistry A
Electrolytic cells combining silver oxidation with hydrogen reduction were designed to generate H... more Electrolytic cells combining silver oxidation with hydrogen reduction were designed to generate H2 and size-selective AgCl in an energy efficient manner.
Advanced Engineering Materials
Materials Today Energy, 2022
Materials Research Express, 2019
Theoretical development of anodized TiO2 nanotube array was made by using high field conduction t... more Theoretical development of anodized TiO2 nanotube array was made by using high field conduction theory. The theory reveals that the high electric field (>106 V cm−1) due to low resistance offered by titanium electrode in the beginning of anodization results the rapid formation of compact TiO2 layer defined by pilling-bedworth ratio (PBR). The increasing thickness in the oxidized layer proportionally develops the stress in the oxide layer which results micro-cracks in the TiO2 layer to minimize the energy strain by increasing the surface area. These cracks steer the formation of TiO2 nanotube array throughout the anodization process. The presence of fluoride ions in the as prepared electrolyte etches at these preferred sites (micro-cracks) and leads the formation of bowl like ordered foot prints. The etching in the oxide layer undergoes continuously until an equilibrium is reached between electrochemically assisted oxidation and chemically assisted dissolution process. Furthermore, on account of frequent use of TiO2 nanotube array in light harnessing applications, the theoretical dynamics of photo-induced charge carriers were also studied using carrier continuity equation under quasi state condition.
Materials Research Express, 2017
Ordered compact TiO2 nanotubes have been fabricated by using third generation electrolyte on empl... more Ordered compact TiO2 nanotubes have been fabricated by using third generation electrolyte on employing the electrochemical anodisation technique. The titania nanotube growth is intiated by etching the oxide layer due to fluoride ions in the prepared electrolyte therby results the pore formation which continue to deepen in the oxide layer by maintaining the atmosphere of high and low pH at the mouth and bottom of the titania nanotubes, respectively. Using field emission scanning electron microscope (FESEM) and anodization current time spectra, detailed fabrication mechanism of compact TiO2 nanotubes have been explained. Moreover, the resulting TiO2 nanotubes were studied for light absorption using diffuse reflectance spectroscopy and photo-eletrochemical property using electrochemical analyzer. The absorption and photo-electrochemical spectra of the resulting titania nanotubes show the band gap of ~3.2 eV and photocurrent density of ~4.85 mA cm−2 respectively. The elemental composition and phase purity of the finally prepared compact TiO2 nanotubes (anatase) were confirmed by EDAX coupled with FESEM and x-ray diffractogram, respectively.
Journal of Materials Chemistry A
The significance of ferroelectric and ferroelastic materials physico-chemistry is summarized and ... more The significance of ferroelectric and ferroelastic materials physico-chemistry is summarized and detailed for various photocatalytic reactions, followed by an outlook on future advancements.
Biosynthesized Nanomaterials
ACS Sustainable Chemistry & Engineering