Krantiguru Shyamji Krishna Verma Kachchh University

www.kskvkachchhuniversity.org
Bhuj, India

Krantiguru Shyamji Krishna Verma Kachchh University named after Shyamji Krishnavarma of Kachchh, Gujarat, India is a regional university that promotes higher education in regional and rural areas of the country. Wikipedia.

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Dave P.N.,Krantiguru Shyamji Krishna Verma Kachchh University | Chopda L.V.,Government Engineering College
Journal of Nanotechnology | Year: 2014

In the 21st century water polluted by heavy metal is one of the environment problems. Various methods for removal of the heavy metal ions from the water have extensively been studied. Application of iron oxide nanaparticles based nanomaterials for removal of heavy metals is well-known adsorbents for remediation of water. Due to its important physiochemical property, inexpensive method and easy regeneration in the presence of external magnetic field make them more attractive toward water purification. Surface modification strategy of iron oxide nanoparticles is also used for the remediation of water increases the efficiency of iron oxide for the removal of the heavy metal ions from the aqueous system. © 2014 Pragnesh N. Dave and Lakhan V. Chopda.


Chaturvedi S.,Krantiguru Shyamji Krishna Verma Kachchh University | Dave P.N.,Krantiguru Shyamji Krishna Verma Kachchh University
Journal of Energetic Materials | Year: 2013

In this review data from the literature on thermal decomposition of ammonium nitrate (AN) and the effect of additives to their thermal decomposition are summarized. The effect of additives like oxides, cations, inorganic acids, organic compounds, phase-stablized CuO, etc., is discussed. The effect of an additive mainly occurs at the exothermic peak of pure AN in a temperature range of 200°C to 140°C. © 2012 Copyright Taylor and Francis Group, LLC.


MacWan D.P.,Nirma University | Dave P.N.,Krantiguru Shyamji Krishna Verma Kachchh University | Chaturvedi S.,Krantiguru Shyamji Krishna Verma Kachchh University
Journal of Materials Science | Year: 2011

Nanomaterials, defined as particles ranging from 1 to 100 nm diameter, have become widely utilized because of their unique physicochemical properties. Among those nanoparticles, titanium dioxide (TiO 2) is frequently used in the production of paints, paper, plastics, welding rod-coating material, cosmetics, etc. TiO 2 is the most commonly used semiconductor photocatalyst. Among the different nanomaterials, it is the most studied. Activated by UV-A irradiation, its photocatalytic properties have been utilized in various applications. A wealth of information on TiO 2 photocatalytic in activation of bacteria has been acquired over the last 20 years. Hence, in this review article we have described synthesis methods mainly sol-gel type method like sol-gel method, ultrasonic-assisted sol-gel method, microemulsion method, colloidal synthesis, and also other method are discussed like solvo-thermal method, thermal plasma process, supersonically expanded plasma jet method, induction plasma torch, reactive plasma processing, plasma electrolytic oxidation, hydrolysis method, thermohydrolysis method, coprecipitation method, citrate-nitrate autocombustion method, etc. Also applications of TiO 2 like medical applications, environmental application, sensor application, photocatalytic applications, and also its health impact for long-term exposure are discussed. © 2011 Springer Science+Business Media, LLC.


Kharadi G.J.,Krantiguru Shyamji Krishna Verma Kachchh University
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2012

The author aimed to determine the activation energy for the thermal decomposition on mixed ligand copper(II) complexes of the type [Cu(L n)(CQ)(H 2O) 2].xH 2O (where L 1 = 2-bromo-7-hydroxy-10,11-dihydroindeno[5,4-c]chromen-6(9H)-one, L 2 = 2-bromo-7-hydroxy-9,10,11,12-tetrahydro-6H-naphtho[2,1-c] chromen-6-one, L 3 = 5-bromo-14-hydroxy-7,8-dihydro-1H-phenanthro[2,1- c] chromen-1-one, and x = 4, 5, 3) were studied at room temperature. All the compounds have been characterized by elemental analysis, magnetic susceptibility, FT-IR, 1H-NMR, 13C-NMR, electronic spectra and FAB-mass spectrometry. Electronic spectra and magnetic susceptibility measurements indicate octahedral stereochemistry. TGA and DSC determined thermal stability, order of kinetics, heat capacity, and activation energy of thermal degradation for these complexes. Order of stability of complexes was found to be [Cu(L 1)(CQ)(H 2O) 2].4H 2O > [Cu(L 2)(CQ)(H 2O) 2].5H 2O > [Cu(L 3)(CQ)(H 2O) 2].3H 2O. The ligands, metal salts, complexes, control, and standard drug were tested for their in vitro antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, Serratia marcescens, and Bacillus substilis. The metal complexes exhibit good activity against bacterial strains compared with parental compounds and moderate compared with the standard drug (Clioquinol). Copyright © Taylor & Francis Group, LLC.


Chaturvedi S.,Krantiguru Shyamji Krishna Verma Kachchh University | Dave P.N.,Krantiguru Shyamji Krishna Verma Kachchh University | Shah N.K.,Gujarat University
Journal of Saudi Chemical Society | Year: 2012

In the era of nanoscience where all the devices and technologies are going to smaller and smaller in size with improved properties; catalysis is an important field of application. In this review article we are trying to summarize data reported in literature for application of nano sized catalyst in our daily life which are useful for human beings. Improvement in catalytic properties due size of catalyst reduced to nano scale is discussed here. Introductive points regarding nanoscience; their functional approaches; current research are also here. Main applications of nanocatalysts in water purification; fuel cell; energy storage; in composite solid rocket propellants; bio diesel production; in medicine; in dye; application of carbon nano tubes and several other point of application are discussed here in detail. © 2011 King Saud University.


Chaturvedi S.,Krantiguru Shyamji Krishna Verma Kachchh University | Dave P.N.,Krantiguru Shyamji Krishna Verma Kachchh University
Journal of Experimental Nanoscience | Year: 2012

In this review, an attempt to collect the summarised data of literature on catalytic effect of nano-oxides, such as mono oxides, mixed oxide, binary and ternary ferrites and rare earth metal oxides on the thermal decomposition of ammonium perchlorate (AP) is made. Influence of size effect of oxides on thermal decomposition of AP and comparison of bulk and nanosized oxides is also discussed here. Several experimental results revealed that due to small size and large surface area nanosized metal oxides are more potential catalysts on thermal decomposition of AP compared to their bulk size oxides. © 2012 Copyright Taylor and Francis Group, LLC.


Chaturvedi S.,Krantiguru Shyamji Krishna Verma Kachchh University | Dave P.N.,Krantiguru Shyamji Krishna Verma Kachchh University
Desalination | Year: 2012

Universal access to safe drinking water is a challenge to the scientific community to which the responsibility is incumbent on developing appropriate technologies. Safe drinking water must be globally available to all communities worldwide. It can be roughly considered that water infrastructure is well developed in urban areas as opposed to rural areas where the infrastructure is either poorly developed or non-existent. Accordingly, the population to be urgently deserved with safe drinking water is the rural one. In this review we are trying to summarize all methods reported in the literature for the removal of iron from groundwater for water purification. © 2012 Elsevier B.V.


Kharadi G.J.,Krantiguru Shyamji Krishna Verma Kachchh University
Journal of Thermal Analysis and Calorimetry | Year: 2012

Four copper(II) new mix ligand complexes of the coumarin derivative (A1 = 7-hydroxy-10,11-dihydroindeno[ 5,4-c]chromen-6(9H)-one, A2 = 2-bromo-7- hydroxy-10,11- dihydroindeno[5,4-c]chromen-6(9H)-one, A3 = 7-hydroxy-4-methoxy- 10,11-dihydroindeno[5,4-c]ch romen-6(9H)-one, and A4 = 5-hydroxy-8,9- dihydrobenzo[f]in deno[5,4-c]chromen-4(7H)-one) and 1,10-Phenanthroline have been synthesized. The structural interpretations were confirmed from elemental analyses, magnetic susceptibility and FAB mass spectral, as well as from IR spectral studies. From the analytical, spectroscopic, and thermal data, the stoichiometry of the mentioned complexes was found to be 1:1:1 (coumarin ligand:copper metal:1,10-Phenanthroline). The thermal stabilities of these complexes were studied by thermogravimetric (TG/DTG) and the decomposition steps of these four complexes are investigated. Kinetic parameters such as order of reaction (n) and the energy of activation (Ea) were calculated using Freeman-Carroll method. The pre-exponential factor (A), the activation entropy (S*), the activation enthalpy (H*), and the free energy of activation (G*) were calculated using Horowitz-Matzger equations. Based on the Ea values, the thermal stabilities of complexes in the decreasing order are Cu(II)-2≥Cu(II)-3≥Cu(II)-4≥Cu(II)-1. © Akademiai Kiado, Budapest, Hungary 2011.


Chaturvedi S.,Krantiguru Shyamji Krishna Verma Kachchh University | Dave P.N.,Krantiguru Shyamji Krishna Verma Kachchh University
Journal of Materials Science | Year: 2013

This article begins by discussing the concept of deign process of nanomaterials and their importance in this era. Several methods which are reported earlier are discussed here for the synthesis of different dimensions (0D, 1D, 2D, and 3D) of nanoparticles. Their application in future and how they are bifacial for the society is also discussed. © 2013 Springer Science+Business Media New York.


Chaturvedi S.,Krantiguru Shyamji Krishna Verma Kachchh University | Dave P.N.,Krantiguru Shyamji Krishna Verma Kachchh University
Journal of Saudi Chemical Society | Year: 2013

In this review, an attempt to collect summarized literature data on catalytic effect of nanosized metals and nanoalloys on the thermal decomposition of ammonium perchlorates (AP) is made. Several experimental results show nanometals are more effective catalysts as compared to nanosized metal oxides. During decomposition process; metal react with oxygen containing species that are produced in decomposition process; and metal oxide is formed with large amount of heat which enhances the catalytic activity of metals as compared to metal oxide nanoparticles. © 2011.

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