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Vallabh Vidyanagar, India

Sardar Patel University is a university in the Gujarat state of India. It is named after independence leader Shri Sardar Vallabhbhai Patel . It was founded in 1955 by Shri Bhailalbhai D. Patel, known as Bhaikaka. This university considered as one of the best in India for higher education.The university was established by an Act of the Legislative Assembly of the then-Bombay Province in December 1955 and was UGC recognized under 2 of the UGC Act in October 1968. The university has many affiliated colleges and AICTE approved by All India Council for Technical Education, , New Delhi. 05-05-2010, Originally it had the status of a rural university but now it has diversified with the motto of "Excellence Matters". The university is the first among all the universities in Gujarat to volunteer for the accreditation in 2000. Sardar Patel University is listed among Top 30 Universities in India. Wikipedia.

Polyacrylonitrile (PAN)-grafted sodium salt of partially carboxymethylated tamarind kernel powder (Na-PCMTKP-g-PAN, %G = 413.76 and %GE = 96.48) was prepared using the established optimal reaction conditions for ceric-initiated graft copolymerization of acrylonitrile onto Na-PCMTKP (DS̄ = 0.15) in a homogeneous medium. The graft copolymer was hydrolyzed by 0.7N KOH solution at 90-95°C to yield the superabsorbent hydrogel H-Na-PCMTKP-g-PAN. The nitrile groups of Na-PCMTKP-g-PAN were completely converted into a mixture of hydrophilic carboxamide and carboxylate groups during alkaline hydrolysis, followed by in situ crosslinking of the grafted PAN chains. The products were characterized spectroscopically and morphologically. The swelling behavior of the unreported superabsorbent hydrogel, H-Na-PCMTKP-g-PAN, was studied by carrying out its absorbency measurements in low-conductivity water, 0.15M salt (NaCl, CaCl2, and AlCl3) solutions, and simulated urine (SU) at different timings. The swelling behavior of the hydrogel in different swelling media followed the second-order kinetics. The values of the various swelling characteristics were reported. © 2013 Wiley Periodicals, Inc.

Balapure K.,Gujarat Vidyapith University | Bhatt N.,Gujarat Vidyapith University | Madamwar D.,Sardar Patel University
Bioresource Technology | Year: 2015

The present research emphasizes on degradation of azo dyes from simulated textile wastewater using down flow microaerophilic fixed film reactor. Degradation of simulated textile wastewater (COD 7200mg/L and dye concentration 300mg/L) was studied in a microaerophilic fixed film reactor using pumice stone as a support material under varying hydraulic retention time (HRT) and organic loading rate (OLR). The intense metabolic activity of the inoculated bacterial consortium in the reactor led to 97.5% COD reduction and 99.5% decolorization of simulated wastewater operated under OLR of 7.2kgCODm3/d and 24h of HRT. FTIR, 1H NMR and GC-MS studies revealed the formation of lower molecular weight aliphatic compounds under 24h of HRT, leading to complete mineralization of simulated wastewater. The detection of oxido-reductive enzyme activities suggested the enzymatic reduction of azo bonds prior to mineralization. Toxicity studies indicated that microbial treatment favors detoxification of simulated wastewater. © 2014 Elsevier Ltd.

Patel R.,Sardar Patel University
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2012

A significant effect of aggregation dynamics for aqueous ferrofluid (AF) and kerosene based ferrofluid (KF) using magnetic field dependent capillary viscosity and magneto-optical relaxation measurements is studied. For better comparison parameters of AF and KF are kept similar. Ferrohydrodynamic equations of chain forming ferrofluids, dilute ferrofluids, and Brownian dynamic simulations are compared. It is observed that the rotational viscosity of AF is larger than that of KF due to field induced aggregates in it and strong dipolar interactions. It is also observed that at Ωτ ∼ 0.04 both AF and KF viscosity becomes almost similar, suggesting similar behavior at that shear rate. The magneto-optical relaxation in AF exhibits nonexponential behavior when relaxed from higher magnetic field and follows irreversible thermodynamics, whereas for KF the relaxation is exponential and follows the effective field method. This discrepancy is explained based on aggregation dynamics of magnetic particles. Results are well described by the corresponding theoretical models. © 2012 American Physical Society.

Soni S.S.,Sardar Patel University | Kotadia D.A.,Sardar Patel University
Catalysis Science and Technology | Year: 2014

Pd(0)-doped mesoporous TiO2 nanoparticles (Pd/TiO2) have been synthesized using an EISA method. The catalytic activity of Pd/TiO2 nanoparticles (NPs) is significantly enhanced under solar light irradiation for the Heck reaction. The Heck coupling product gives a considerable amount of Z-isomer, due to photochemical isomerization of the initially formed E-isomer, providing a facility for the time-dependent selectivity of E/Z-isomers under sunlight at ambient conditions. This journal is © The Royal Society of Chemistry.

Fadadu K.B.,Sardar Patel University | Soni S.S.,Sardar Patel University
Electrochimica Acta | Year: 2013

New hemicyanine dyes having indole nucleus with different alkyl chain length were synthesized and characterized using 1H NMR and mass spectroscopy. These dyes were used to sensitize the TiO2 film in dye sensitized solar cell. Nanocrystalline dye solar cells were fabricated and characterized using various electrochemical techniques. It has been found that the alkyl chain length present in the dye molecules greatly affects the overall performance of dye solar cell. Molecules having longer alkyl chain are having better sensitizers which enhance Voc to significant extent. Chain length dependent performance was further investigated using Tafel polarization and impedance method. Hemicyanine dye having hexyl chain has outperformed by attaining 2.9% solar to electricity conversion efficiency. © 2012 Elsevier Ltd. All rights reserved.

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