mgh zaidi | Govind Ballabh Pant Krishi evam Prodyogik Vishva Vidyalaya, Pantnagar, India (original) (raw)

Papers by mgh zaidi

IOP Conference Series: Materials Science and Engineering

Advances in Solar Power Generation and Energy Harvesting

Portugaliae Electrochimica Acta

Carbonaceous materials are used to generate composites for numerous purposes, due to their extrao... more Carbonaceous materials are used to generate composites for numerous purposes, due to their extraordinary properties. In this context, we have carried out a study on the modified properties, viz. thermal stability and specific capacitance of the composites fabricated by the introduction of a carbonaceous material (graphite and graphene oxide) into the Polyvinyl Butyral matrix. Since it has excellent adhesibility and dielectric permittivity, and it can be employed as an electrode in sensors, polyvinyl butyral is used in the current investigation, along with carbonaceous materials, for electrochemical and bandgap properties (HOMO-LUMO) studies. Spectroscopic FT-IR, XRD and SEM analyses remark the comprehensive entanglement of the two components. Various fabricated composites show an increased thermal stability, with a percentage of carbonaceous filler, as suggested by TGA. Cyclic voltammetry studies reveal that PVB acts as an excellent binder, and as a good matrix for the charge movement through it, because it has a good level of dielectric permittivity, thus enabling fabricated materials to be developed as good candidates for supercapacitive batteries.

Journal of Nanostructure in Chemistry

The present investigation deals with the development of a novel polymer nanocomposite (PNCs) elec... more The present investigation deals with the development of a novel polymer nanocomposite (PNCs) electrodes for simple, selective and sensitive detection of chlorpyrifos (CHL). PNCs were developed using surfactant facilitated polymerization of indole using different concentrations (wt%) of WC ranging 5–30. Formation of PNCs was ascertained through diversified analytical methods. Electrodes were derived from PNCs over stainless steel substrate for electrochemical quantification of CHL. With concentration of WC, the DC conductivity (10−2 × S/cm) of electrodes was increased ranging 3.54–0.75 at 313 K. Electrochemical impedance spectroscopy reveals well stability of electrodes in phosphate buffer (PBS, 0.1 M) at pH 7.4. The performance of electrodes towards detection and quantification of CHL was investigated through square wave voltammetry. Study reveals that detection and quantification of CHL were dependent on concentration of WC in nanocomposites. Square wave voltammetry reveals that th...

Advanced Science, Engineering and Medicine

Magnetic hydrogels are the stimuli responsive polymeric networks with potential applications in p... more Magnetic hydrogels are the stimuli responsive polymeric networks with potential applications in protein purification, cell separation and target drug delivery. In the present investigation, efforts are made on synthesis and characterization of magnetic hydrogels from poly(N-isopropylacrylamide) for onwards application in target delivery of an anticancer drug Doxorubicin. Formation of reaction products was ascertained through diversified spectral methods. Ultraviolet spectra reveal in vitro biocompatibility of Doxorubicin that imparts sustained delivery up to 72 hrs at pH 7.2 ± 0.2 under ambient conditions. The present investigation provides an inexpensive method of synthesis of magnetic hydrogels suitable for magnetically derived delivery of anticancer drugs.

Materials for Renewable and Sustainable Energy

Polyindole-based hybrid composites are being recognized as a promising candidate to be used in en... more Polyindole-based hybrid composites are being recognized as a promising candidate to be used in energy storage field along with other conjugated organic polymers. Polyindoles themselves are affected with low electrical and electrochemical conductivity; nevertheless, high redox activity, tunable electrical conductivity, significant thermal stability, slow degradation rate, and possible blending property give them upper hand to be used as a good contender. Certain factors viz. electrolyte, concentration, morphology, pH, temperature, etc., are major components affecting performance of Polyindole and its composites. This assessment recapitulates the position of Polyindole and its hybrid composite to be used as energy harvest material; in addition, this evaluation also pronounces the future aspect of the hybrids.

Bulletin of Materials Science

Waste management (New York, N.Y.), 2018

The management of electronic waste (e-waste) becomes a global issue in this digital era. Existing... more The management of electronic waste (e-waste) becomes a global issue in this digital era. Existing conventional practices are harmful for dealing with the e-waste, therefore, indigenous soil bacteria were explored for e-waste treatment through enrichment culture approach followed by screening, identification and their bioformulation used for in situ investigation. Soil bacteria were enriched in the presence of e-waste after 30 days of incubation under standard laboratory conditions. This finding was established through λ values that were higher in the case of soil enrichment than the control. The biodegradation of e-waste by the selected strains during enrichment and in situ experiment was confirmed by FTIR, TG-DTG-DTA and SEM analysis. The FTIR spectra evidently support that microbial communities present in the enriched soil has affected the C-chain and used as carbon source for their growth. This chemical structural degradation of e-waste was further substantiated by thermal and SE...

Material Science Research India

International Journal of Polymeric Materials and Polymeric Biomaterials

International Journal of Engineering Research and Applications

The aim of this article is to present morphological studies on the tensile fractured specimens of... more The aim of this article is to present morphological studies on the tensile fractured specimens of novel liquid rubber obtained from the pyrolysis of scrap rubber. Such a study is crucial for gaining useful insight into the toughening mechanisms existing in rubber modified systems. A DGEBA based epoxy resin was first modified with varying concentrations (0-15 wt. %) of the liquid rubber. Dogbone shaped specimens of the cast plaques of the modified epoxies were tested under uniaxial tensile loading. The fracture surface was elucidated with the help of scanning electron microscopy (SEM). It was observed that biphasic morphology characterized with continuous epoxy phase and microvoids distributed throughout the epoxy domain develop in the modified epoxies. Cavitation of rubber particles under crack tip stresses is the reason behind development of these microvoids. The diameter of these microvoids were analyzed using the image analysis technique and was observed to increase with the concentration of rubber. Prevalent toughening mechanisms were visualized in the SEM micrographs necessary for the development of tougher and more ductile rubber modified epoxy systems.

Plant Physiology and Biochemistry

Metal nanoparticles have been reported to influence plant growth and productivity. However, the m... more Metal nanoparticles have been reported to influence plant growth and productivity. However, the molecular mechanisms underlying the effects have not been completely understood yet. Current work describes the physio-biochemical basis of iron sulfide nanoparticle induced growth and yield enhancement in Brassica juncea. Iron sulfide nanoparticles (0, 2, 4, 6, 8 and 10 ppm) were used for foliar treatment of B. juncea at 30, 45 and 60 days after sowing, under field conditions. Foliar treatment of 4 ppm iron sulfide nanoparticle solution at 30 days after sowing brought maximal enhancement in agronomic attributes of the treated plants. Results of assays i.e. total chlorophyll, electrolyte leakage, Malondialdehyde (MDA), proline, HO and antioxidant enzyme activities indicated the benign effect of iron sulfide nanoparticles on plants. Consequently, improved redox status of the treated plants, enabled them to assimilate higher photosynthate. The augmentation in growth and seed yield in iron sulfide nanoparticle treated plants was amply supported by activation of RUBISCO small subunit (rubisco S), RUBISCO large subunit (rubisco L), glutamine synthetase (gs) and glutamate synthase (gogat) genes. Thus, iron sulfide nanoparticle induced growth and yield enhancement is proposed to be mediated through activation of carbon and nitrogen assimilatory pathways at specific growth stage. The iron content in the leaves and root tissues of the treated plants was also significantly improved.

3 Biotech, 2017

Application of polyhydroxybutyrate (PHB) to plastic industry has expanded over the last decades d... more Application of polyhydroxybutyrate (PHB) to plastic industry has expanded over the last decades due to its attracting features over petro-based plastic, and therefore, its waste accumulation in nature is inevitable. In the present study, a total of four bacterial strains, viz., MK3, PN12, PW1, and Lna3, were formulated into a consortium and subsequently used as biological tool for degradation of biopolymers. The consortium was tested through λ max shifts under in vitro conditions for utilization of PHB as sole carbon source. Talc-based bioformulations of consortium were used for the degradation of PHB film composites under in situ conditions. After 9 months of incubation, the recovered samples were monitored through Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM), respectively. Analytical data, viz., changes in λ max shifts (212-219 nm), FT-IR spectra, and SEM micrographs, revealed the biodegradation potential of developed consortium against PH...

AIP Conference Proceedings, 2009

Plastic waste biodegradation studies have seen several developmental phases from the discovery of... more Plastic waste biodegradation studies have seen several developmental phases from the discovery of potential microbial cultures, inclusion of photo-oxidizable additives into the polymer chain, to the creation of starch-embedded biodegradable plastics. The present study deals with ...

E-Journal of Chemistry, 2004

Cyclocondensation of a series of substituted phenoxy methylene carboxylic acids with thiosemoicar... more Cyclocondensation of a series of substituted phenoxy methylene carboxylic acids with thiosemoicarbazides afforded 2-Amino-5-Aryloxy Methylene –1,3,4 Thiadiazoles (Ia-Ie). The later were subsequently condensed with different phenoxymethylene carboxylic acid chlorides into 2- Aryloxy Methyleneamido-5-Aryloxy Methylene–1,3,4-Thiadiazoloyl Amides. The wood preservation efficiency of the both class of compounds was evaluated against a wood rotting fungusGleophyllum Straitumat different concentrations using food poison technique. In general phenoxy derivatives have shown more control over the growth ofGleophyllum Straitumthan their corresponding aminothiadiazoles at 500 ppm. The chlorophenoxy-substituted thiadiazoles among all have shown more activity then others againstGleophyllum Straitum.

Journal of Analytical Science and Technology, 2016

Background: Carbon-based metal oxide nanocomposites are always been the prime material for study ... more Background: Carbon-based metal oxide nanocomposites are always been the prime material for study in the field of energy storage due to their rich abundance, low toxicity, high surface area, electrical conductivity and diverse oxidation states. Methods: In this direction, novel zirconia/graphene oxide (ZrO 2 /GO) nanocomposites are fabricated on the surface of 316 stainless steel for studying their specific capacitance and power performance. ZrO 2 and GO in varying mass ratio (1:1, 1:2, and 2:1) were used to fabricate the electroactive material. The physical interaction between the two was determined by Fourier transform-infrared, X-ray diffraction and scanning electron microscopy. TG-DTA-DG informs about the exhibited thermal property by the variants. The cyclic voltammetry was done to study the specific capacitance of the electroactive materials with reference to Ag/AgCl at scan rate (V/s) ranging 0.15-0.001 in 1.0 M KOH. The specific capacitance of ZrO 2 was found to be 17.13 Fg −1 at 0.001 Vs −1. The representative (nanocomposite) NC-II shows the maximum specific capacitance of 299.26 Fg −1 at similar rate of scan with power density of 59.40 W/kg. Conclusion: The nanocomposites show comparable level of charge-discharge behavior with long-term cycleability, suggesting that fabricated ZrO 2 /GO nanocomposite electrodes are promising candidate for the high-performance energy storage devices.

Protoplasma, 2015

Thermoplastic-based materials are recalcitrant in nature, which extensive use affect environmenta... more Thermoplastic-based materials are recalcitrant in nature, which extensive use affect environmental health. Here, we attempt to compare the response of indigenously produced bacterial consortium-I and consortium-II in degrading polyvinyl chloride (PVC). These consortia were developed by using different combination of bacterial strains of Pseudomonas otitidis, Bacillus cereus, and Acanthopleurobacter pedis from waste disposal sites of Northern India after their identification via 16S rDNA sequencing. The progressive degradation of PVC by consortia was examined via scanning electron microscopy, atomic force microscopy, UV-vis, FT-IR spectra, gel permeation chromatography, and differential scanning calorimetry analysis at different incubations and time intervals. The consortium-II was superior over consortium-I in degrading the PVC. Further, the carbon source utilization analysis revealed that the extensive use of consortia has not any effect on functional diversity of native soil microbes.

Nanoscience and Nanotechnology, 2012

A microwave (MW) assisted green process to synthesize nanomagnetic polymer composites (NPCs) base... more A microwave (MW) assisted green process to synthesize nanomagnetic polymer composites (NPCs) based on polyacrylonitrile (PAN) has been developed. The process involves 2,2-azobisisobutyronitrile initiated in-situ polymerization of acrylonitrile in presence of tween-20 stabilized ferrite nanoparticles (FNPs) under MW irradiation ranging 25 to 100 Watt over 10min. With MW power, the polymerization reaction has been progressed resulting in NPCs with enhanced rheoviscosity and yield over PAN. The formation of NPCs has been ascertained through Fourier transformed infra-red spectra, X ray diffraction and atomic force microscopy .Vibrating sample magnetometry and simultaneous thermogravimetric-differential thermal analysis-differential thermogravimetry reveals the formation of thermally stable NPCs with saturation magnetization 70.0 emu/g.