Dnyaneshwar Rambhau Shinde
@prof. ramkrishna more arts commerce and science college akurdi
Professor, Department of Chemistry
Dnyaneshwar Rambhau Shinde
EDUCATION
M.Sc. ; Ph. D
RESEARCH, TEACHING, or OTHER INTERESTS
General Chemistry, Catalysis, Inorganic Chemistry, Materials Science
Scopus Publications
Scopus Publications
Abhijeet Khandagale, Dnyaneshwar Shinde, Yogesh Patil, Kisan Gadave, Ramesh Deokate, Pratik Patil, Rajendra Kale, Aparna Sajjan, Vasant Chabukswar, and Manohar Chaskar
Springer Science and Business Media LLC
Akanksha S. Chougale, Snehal S. Wagh, Harshad D. Shelke, Shoyebmohamad F. Shaikh, Ravindra N. Bulakhe, Ji M. Kim, Shashikant P. Patole, and Dnyaneshwar R. Shinde
Springer Science and Business Media LLC
Ganesh Totre, Dnyaneshwar Shinde, Sachin Shirsath, Prakash Patil, and Pramod Kulkarni
Springer Science and Business Media LLC
Akanksha S. Chougale, Snehal S. Wagh, Harshad D. Shelke, Shoyebmohamad F. Shaikh, Ravindra D. Bulakhe, Ji M. Kim, Shashikant P. Patole, and Dnyaneshwar R. Shinde
Springer Science and Business Media LLC
, Akanksha Chougale, , Bikram Prasad, , Sarika Salunkhe, , Dnyaneshwar Shinde, , Vishal Kadam,et al.
Engineered Science Publisher
Ganesh Totre, Dnyaneshwar Shinde, Prakash Patil, and Pramod Kulkarni
Wiley
AbstractHere, we have reported an efficient one‐pot, three‐component reaction between various aryl aldehydes, NH2OH.HCl, and propargyl alcohol using Ni‐Fe2O4 as a nanocatalyst. Reactions were performed in ethanol at room temperature to obtain various 3‐aryl substituted isoxazole‐5‐carboxylic acids. The advantage of this protocol is that it formed isoxazole derivatives with free carboxylic acid functionality in one pot, which could transform into various other functional groups. This approach has several merits, including a quick reaction time, a wide range of substrates, excellent product yields, and reusable catalysts.
Kisan M. Gadave, Pankaj K. Bhujbal, D. R. Shinde, and S. P. Rasale
Engineered Science Publisher
, Dnyaneshwar R. Shinde, Imran S. Quraishi, , Ramdas A. Pawar, , and
Engineered Science Publisher
The present work focusses on the best source of radiation and optimization of the process parameters in the photocatalytic degradation of the dye in a slurry reactor. For the photocatalytic degradation of dyes in water, a cylindrical slurry photoreactor has been fabricated in glass of two litter capacity. The performance of a reactor in the degradation of orange M2R (OM2R) dye was evaluated under visible light irradiation using ZnO as a photo-catalyst. ZnO was obtained by thermal decomposition of ZnCO 3 and characterized for its crystalline structure, surface morphology, and the band gap. Different parameters affecting the degradation of the dye in the reactor were optimized. The pH of the dye solution, catalyst dose, and concentration of the dye solution were found to be dominating experimental parameters affecting the dye degradation in the reactor. Taguchi L 9 (3 4 ) orthogonal array method was used to design the degradation experiment. The pseudo-first-order decolourization rate constant was evaluated by applying the Langmuir–Hinshelwood equation. The results of the experiments were statically analysed and compared to obtain the optimal experimental conditions for the degradation of the dye in the reactor. The research finding proved that metal halide lamp is the best source for the process.
Sagar Arya, Hiralal Sonawane, Siddharam Math, Popat Tambade, Manohar Chaskar, and Dnyaneshwar Shinde
Springer Science and Business Media LLC
, Umar Ali Dar, Sunita Salunke-Gawali, , Dnyaneshawar Shinde, , Sujit Bhand, , Surekha Satpute, and
Engineered Science Publisher
Synthesis, thermal, spectral, electrochemical, and magnetic properties of transition metal complexes of 2-bromo-3-hydroxynaphthalene-1,4-dione(abbreviated as L) are discussed. The complexes viz, [Zn(L) 2 (H 2 O) 2 ]; ZnL, [Cu(L) 2 (H 2 O) 2 ]; CuL, [Ni(L) 2 (H 2 O) 2 ]; NiL, [Co(L) 2 (H 2 O) 2 ]; CoL, are resulted from the reactions of L with respective metal chlorides in methanol. The carbonyl frequency (1633 cm -1 ) of the ligand remains the same in ZnL, whereas it is observed at a higher wavenumber (17 cm -1 ) in CuL and lower wavenumber (3 cm -1 ) in NiL and CoL. The thermal decomposition of the complexes was studied by thermogravimetry. Powder X-ray diffraction studies further analyzed the respective metal oxide formed in TG studies. Redox potentials of all complexes are determined by cyclic voltammetry studies. It is difficult to reduce or oxidize the ligand after complexation. The frozen solution (DMSO) spectrum (133 K) of CuL shows four 63 Cu hyperfine lines in the g ║ region with A ║ = ~155 G in CuL. The ligand, as well as all-metal complexes, showed considerable antibacterial activity against six strains viz. Escherichia coli NCIM 2065 , Proteus vulgaris NCIM 2027 , Pseudomonas aeruginosa MTCC (Microbial Type Culture Collection and Gene Bank) 2297, P. putida MTCC 2463.
Nirajkumar H. Jadhav, Sachin S. Sakate, Dnyaneshwar R. Shinde, Manohar G. Chaskar, and Ramdas A. Pawar
Elsevier BV
I.S. Quraishi, R.A. Pawar, D.R. Shinde, P.S. Tambade, and M.G. Chaskar
Asian Journal of Chemistry
In present study, ZnO photocatalysts were successfully synthesized by thermal decomposition of different precursors. Thermal decomposition temperatures of precursors were obtained by thermogravimetric analysis. The synthesized ZnO photocatalysts were characterized for their crystalline phase, surface morphology and band gap, respectively by powder X-ray diffraction, scanning electron microscopy and diffuse reflectance spectroscopic methods. Chemical analysis of synthesized ZnO photocatalysts was performed for Zn(II) content. Photocatalytic activity of ZnO photocatalysts was evaluated under the solar irradiation on crystal violet dye in aqueous solution. The results of experiments showed that ZnO synthesized from zinc carbonate consists of higher photocatalytic activity than ZnO synthesized from other precursors, which is even higher than bench mark Degussa P-25 TiO2 photocatalyst. ZnO synthesized from zinc carbonate is further used for mineralization of dyes from three different effluents.
, Shital S. Rakhunde, Kisan M. Gadave, , Dnyaneshwar R. Shinde, , Pankaj K. Bhujbal, and
Engineered Science Publisher
In the present study, dye-sensitized solar cells (DSSCs) were fabricated using novel [(2-hydroxy-1-naphthyl) diazenyl] benzoic acid (2-HNDBA) dye. The effect of dye absorption time on the performance of DSSCs was studied. The doctor blade method was employed to prepare the ZnO seed layer. The structural, morphological and optical properties of the ZnO photoanode were studied systematically. The syntesized ZnO was found to be of hexagonal wurtzite structure. The 2-HNDBA sensitized zinc oxide based DSSCs have been studied for its photoresponse at the dye absorption time from 60 -240 min. The fabricated DSSC prepread at 60 min dye absorbtion time was found to exibit a fill factor and a photo conversion efficiency of 0.44 and 1.09 %, respectively. As the preparing time increases to 120 min, the respective parameters increase to 0.53 and 2.08 % at 120 min. However, on further increasing the dye absorbtion time, the fill factor and photo conversion efficiency are reduced to 0.51, and 1.69%. Thus, 120 min dye absorbtion time has been found to be the optimized dye absorption time for novel 2HNDBA dye-sensitized ZnO photoanode based DSSCs.
Imran Ahmed Quraishi, Ramdas A. Pawar, Dnyaneshawar R. Shinde, and Manohar G. Chaskar
Elsevier BV
Nirajkumar H. Jadhav, Sachin S. Sakate, Nishant K. Rasal, Dnyaneshwar R. Shinde, and Ramdas A. Pawar
American Chemical Society (ACS)
A novel heterogeneous catalytic method was developed for the synthesis of coumarin and its derivatives using the Ti(IV)-doped ZnO matrix forming catalyst Zn0.925Ti0.075O having a high surface area and good Lewis acidity. The catalyst shows high activity toward a broad spectrum of the substituted phenols with β-ketoesters such as ethyl acetoacetate, ethyl butyryl acetate, ethyl benzoyl acetate, and so forth in good yields over short reaction times during the synthesis of coumarins. The methodology was further extended for the synthesis of ayapin molecules. The catalyst also shows recycle activity up to seven cycles with very good stability.
Nirajkumar H. Jadhav, Dnyaneshwar R. Shinde, Sachin S. Sakate, Nishant K. Rasal, and Ramdas A. Pawar
Elsevier BV
Kanchan M. Joshi, Dnyaneshwar R. Shinde, Latesh K. Nikam, Rajendra Panmand, Yogesh A. Sethi, Bharat B. Kale, and Manohar G. Chaskar
Royal Society of Chemistry (RSC)
Flow sheet for isolation of fragmented lignin.
Dnyaneshwar R. Shinde, Ramdas A. Pawar, and Manohar G. Chaskar
Oriental Scientific Publishing Company
A powdered activated charcoal (PAC) based process was evaluated at a bench and pilot scale to determine its effectiveness towards the removal of Cr(VI) from the electroplating effluent. In the first step, reduction of Cr(VI) to Cr(III) was achieved while in a second step Cr(III) was removed by adsorption. In both steps PAC is utilized. Different experimental parameters affecting the reduction of Cr(VI) by PAC were investigated. The rate of reduction reaction was found to be dependent on the pH of effluent and the dose of PAC. Removal of Cr(III) from initially treated effluent was achieved under optimum condition of pH and dose of PAC. After a bench scale experiments, the reduction and removal of chromium from the effluent was achieved at a pilot scale successfully. The experimental result suggests that PAC is a suitable material for the reduction and removal of chromium from the electroplating effluent.
Dnyaneshwar Shinde, Popat Tambade, Habib Pathan, and Kisan Gadave
Walter de Gruyter GmbH
AbstractA dye-sensitized solar cell (DSSC) was assembled using a dye 4-(3-chloro-1, 4-dioxo-1, 4-dihydronaphthalen-2-ylamino) benzoic acid with ZnO as a photoanode. It was synthesized using 2, 3-dichloro 1, 4-naphthoquinone and p-amino benzoic acid. The spectral features of the dye were analyzed in ethanol using experimental and computational methods. The theoretical investigations revealed that the synthesized dye may act as a sensitizer in DSSCs. The photoelectrochemical performance was tested under direct sunlight using a sandwich type DSSC. The photovoltaic data of the dye adsorbed on ZnO films indicated thepower conversion efficiency of 1.07 % under sunlight with a light intensity of 39 mW·cm-2.
Dnyaneshwar R. Shinde, Popat S. Tambade, Manohar G. Chaskar, and Kisan M. Gadave
Copernicus GmbH
Abstract. In this study, we evaluated the photocatalytic activities of analytical reagent (AR) grade ZnO, TiO2, and SnO2 to identify a low-cost photocatalyst for dye degradation. The obtained samples of ZnO, TiO2, and SnO2 were characterised by X-ray diffractogram (XRD), scanning electron microscope imaging, and UV-VIS diffuse reflectance spectroscopy. The decolourisation of three structurally diverse dyes, namely crystal violet, basic blue, and methyl red under solar irradiation, was used to evaluate the photocatalytic activities of three metal oxides. The photocatalytic activities of the received three metal oxides were tested with the photocatalytic degradation of dyes and compared with Degussa P-25. Dye solutions with each metal oxide at initial pH 9 were subjected to irradiation under sunlight and monitored for up to the stage of complete decolourisation. The results indicate that ZnO exhibited the highest photocatalytic activity as compared to TiO2 and SnO2 as well as that of Degussa P-25 (TiO2). The photocatalytic dye decolourisation rates with ZnO were 1.14–1.35, 1.70–3.1, and 4–8.5 times higher than those of the Degussa P-25, TiO2, and SnO2, respectively. The percentage COD removal was studied for ZnO and partial removal was observed at the decolourisation stage. To enhance photocatalytic activity of AR grade ZnO, it was loaded with Ag metal and about 20 % enhancement in the activity was observed.
D. R. Shinde, P. S. Tambade, K. M. Gadave, K. S. Pawar, Mu Naushad, and H. M. Pathan
Springer Science and Business Media LLC
Sandeep Kanade, Dnyaneshwar R. Shinde, and K.G. Kanade
Elsevier BV
Silver metal/Ti-doped ZnO, silver metal/ZnO, Ti(IV)-doped ZnO and ZnO photocatalysts were obtained by thermal decomposition of respective oxalate precursors. The synthesized photocatalysts were characterized by chemical and spectroscopic methods. The doping of ZnO with Ti(IV) and the formation of silver metal heterostructures in ZnO nanostructures were confirmed through powder X-ray diffraction and tunneling electron microscopy analysis. The ZnO and Ti-doped ZnO have crystallized in hexagonal wurtzite structure while heterostructured catalysts showed the presence of additional cubic crystalline phase belonging to Ag metal. Surface morphology was observed through scanning electron microscopic imaging while surface area was determined by Brunauer–Emmett– Teller method. The photocatalytic activity of the photocatalysts was studied on the structurally diverse dyes in the sunlight and under optimized conditions of pH of dye solutions and catalyst dose. The degradation of dyes was measured in terms of decolourization as well as chemical oxygen demand. The photocatalytic activities of the catalysts were compared in terms of first-order rate constants of the decolourization of dyes. The photocatalytic activity of the heterostructured Ag metal/Ti-doped ZnO catalysts was found superior to the photocatalytic activity of ZnO, silver metal/ZnO and Ti-doped ZnO catalysts.
Ramdas A. Pawar, Dnyaneshwar R. Shinde, and Popat S. Tambade
Elsevier BV
AbstractNanosized ZnO crystallites were prepared by a new route from ZnO2 as a precursor. In turn, the precursor was synthesized from Zn(CH3COO)2·2H2O and H2O2 by a simple mechanochemical method. The synthesized photocatalysts was characterized by XRD, SEM, FTIR, and UV–visible spectroscopic methods. The X-ray diffraction data suggest that the synthesized ZnO crystallite has the hexagonal wurtzite structure with crystallite size ~13 nm. ZnO-mediated photocatalytic degradation of the dyes from an effluent has been investigated under solar irradiation. Experimental conditions for degradation of dyes including pH of the effluent, dose of the catalyst, and height of the effluent column in reaction vessel were optimized. Nearly 100% decolorization and more than 95% degradation of the dyes from the effluent were achieved under optimized conditions under solar irradiation within 90 min time.