Sanjay M. Khetre
@dahiwadicollege.in
Professor, Department of Chemistry, Dahiwadi College Dahiwadi,
Dahiwadi College Dahiwadi, Shivaji University Kolhapur
EDUCATION
M.., B.Ed., SET
RESEARCH INTERESTS
Material Science, Green Chemistry, Gas sensing
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Sandip M. Deshmukh, Santosh S. Patil, Santosh B. Babar, Sultan Alshehri, Mohammed M. Ghoneim, Asiya M. Tamboli, Nguyen Hoang Lam, Nguyen Tam Nguyen Truong, Chang Duk Kim, Mohaseen S. Tamboli,et al.
MDPI AG
The photocatalytic removal of water contaminants for ecological systems has become essential in the past few decades. Consequently, for commercialization, cost-efficient, earth-abundant and easy to synthesize photocatalysts for dye degradation are of urgent need. We have demonstrated a simple and feasible approach for fabricating TiO2–SnO2 nanocomposite photocatalysts via urea-assisted-thermal-decomposition with different mass ratios. The as-synthesized materials were characterized by different physicochemical techniques. The phase formation and crystallite size were calculated by using XRD. The STEM, UV-Vis, DRS, HR-TEM and EDS revealed the effective formation of the heterojunction between TiO2 and SnO2, and enrichment in the UV-absorption spectrum. All synthesized materials were used for the photocatalytic degradation of methyl orange (MO) under UV light. The optimized results of the TiO2–SnO2 nanocomposite showed excellent photostability and photocatalytic activity over a number of degradation-reaction cycles of methyl-orange (MO) dye under the illumination of ultraviolet light. In addition, the recent method has great potential to be applied as a proficient method for mixed-metal-oxide-nanocomposite synthesis.
Sandip M. Deshmukh, Sudhir S. Arbuj, Santosh B. Babar, Shoyebmohamad F. Shaikh, Asiya M. Tamboli, Nguyen Tam Nguyen Truong, Chang-Duk Kim, Sanjay M. Khetre, Mohaseen S. Tamboli, and Sambhaji R. Bamane
MDPI AG
In this work, we developed a very simple and novel approach for synthesizing TiO2-ZnO nanocomposites via the urea-assisted thermal decomposition of titanium oxysulphate and zinc acetate at different weight ratios. The synthesized nanocomposite samples were studied by means of HR-TEM, XRD, STEM, UV–Vis DRS, PL and EDS. The observed results demonstrate that the TiO2-ZnO nanocomposite consists of an anatase crystal phase of TiO2 with a crystallite size of 10–15 nm. Combined characterization, including UV–Vis DRS, STEM, EDS and HR-TEM, revealed the successful formation of a heterojunction between TiO2 and ZnO and an improvement in UV spectrum absorption. The photocatalytic activity was explored using MO degradation under ultraviolet light illumination. The results of the optimized TiO2-ZnO nanocomposite show excellent photocatalytic activity and photostability over a number of degradation reaction cycles. In addition, the current approach has immense potential to be used as a proficient method for synthesizing mixed metal oxide nanocomposites.
Sandip Madhukar Deshmukh, Mohaseen S. Tamboli, Hamid Shaikh, Santosh B. Babar, Dipak P. Hiwarale, Ankush Gautam Thate, Asiya F. Shaikh, Mohammad Asif Alam, Sanjay M. Khetre, and Sambhaji R. Bamane
MDPI AG
In the present work, we have reported a facile and large-scale synthesis of TiO2 nanoparticles (NPs) through urea-assisted thermal decomposition of titanium oxysulphate. We have successfully synthesized TiO2 NPs by using this effective route with different weight ratios of titanium oxysulphate: urea. The structures and properties of TiO2 NPs were confirmed by scanning electron microscope) (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), fourier transform infrared spectroscopy (FT-IR), ultra violet–visible spectroscopy (UV-vis), and photoluminescence (Pl) techniques. XRD demonstrated that TiO2 NPs holds of anatase crystal phase with crystallizing size 14–19 nm even after heating at 600 °C. TGA, SEM, and TEM images reveal urea’s role, which controls the size, morphology, and aggregation of TiO2 NPs during the thermal decomposition. These TiO2 NPs were employed for photodegradation of Methyl Orange (MO) in the presence of ultraviolet (UV) radiation. An interesting find was that the TiO2 NPs exhibited better photocatalytic activity and excellent recycling stability over several photodegradation cycles. Furthermore, the present method has a great perspective to be used as an efficient method for large-scale synthesis of TiO2 NPs.
Ashwini Lalaso Jadhav and Sanjay Mahadev Khetre
Springer Science and Business Media LLC
AbstractSonicated sol-gel method was used to prepare LaNiO3from lanthanum nitrate hexahydrate La(NO3)3.6H2O(LN), nickel nitrate Ni(NO3)3.6H2O(NN), glycine and urea. Nanocrystalline LaNiO3powder was formed after heating at 175 °C in 5 min. Particle size of LaNiO3nanopowder was determined by Debay Scherrer’s equation and was found 48 nm. Prepared nanocatalyst characterized with the help of XRD, TGA, SEM, IR, BET surface area, EDX. Surface area of LaNiO3was 9.22 m2/g. We have reported first time good antibacterial activity of LaNiO3forStaphylococcus aureus. Zone of inhibition for LaNiO3was 13 mm studied with the help of agar cup method.
H. V. Jadhav, S. G. Jadhav, and S. M. Khetre
Springer Science and Business Media LLC
S. M. Khetre, A. U. Chopade, C. J. Khilare, H. V. Jadhav, P. N. Jagadale, and S. R. Bamane
Springer Science and Business Media LLC
Pramod N. Jagadale, Shivaji R. Kulal, Meghanath G. Joshi, Pramod P. Jagtap, Sanjay M. Khetre, and Sambhaji R. Bamane
Walter de Gruyter GmbH
Here we report a successful preparation of nanostructured calcium silicate by wet chemical approach. The synthesized sample was characterized by various physico-chemical methods. Thermal stability was investigated using thermo-gravimetric and differential thermal analysis (TG-DTA). Structural characterization of the sample was carried out by the X-ray diffraction technique (XRD) which confirmed its single phase hexagonal structure. Transmission electron microscopy (TEM) was used to study the nanostructure of the ceramics while homogeneous grain distribution was revealed by scanning electron microscopy studies (SEM). The elemental analysis data obtained from energy dispersive X-ray spectroscopy (EDAX) were in close agreement with the starting composition used for the synthesis. Superhydrophilic nature of CaSiO3 was investigated at room temperature by sessile drop technique. Effect of porous nanosized CaSiO3 on early adhesion and proliferation of human bone marrow mesenchymal stem cells (BMMSCs) and cord blood mesenchymal stem (CBMSCs) cells was measured in vitro. MTT cytotoxicity test and cell adhesion test showed that the material had good biocompatibility and promoted cell viability and cell proliferation. It has been stated that the cell viability and proliferation are significantly affected by time and concentration of CaSiO3. These findings indicate that the CaSiO3 ceramics has good biocompatibility and that it is promising as a biomaterial.
S. M. Khetre
Springer Science and Business Media LLC
Shivaji R. Kulal, Sanjay S. Khetre, Pramod N. Jagdale, Vashishtha M. Gurame, Duryodhan P. Waghmode, Govind B. Kolekar, Sandip R. Sabale, and Sambhaji R. Bamane
Elsevier BV
S. M. Khetre, A. U. Chopade, H. V. Jadhav, S. R. Kulal, P. N. Jagadale, S. V. Bangale, and S. R. Bamane
IEEE
Nanocrystalline FeCrO3 with particle size of about 83-123 nm was directly synthesized by sol–gel autocombustion method at room temperature. The overall process involves three steps: formation of homogeneous sol; formation of dried gel; and combustion of the dried gel. Experiments revealed that FeCrO3 dried gel derived from glycine and nitrate sol exhibits self-propagating combustion at room temperature once it is ignited in air. After autocombustion, the desired nanocrystalline FeCrO3 was acquired and no further calcination was needed. The autocombustion was considered as a heat-induced exothermic oxidation–reduction reaction between nitrate ions and carboxyl group. The synthesized powder was characterized by X-ray diffraction (XRD), thermogravimetric and differential thermal analysis (TG/DTA), IR spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM).