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Bharatpur, India

Sharma S.,Msj College | Chaturvedi N.,Msj College | Chaturvedi R.K.,Msj College | Sharma M.K.,Msj College
Pollution Research | Year: 2011

The ammonium phosphomolybdate-assisted photodegradation of a safranine O has been examined under visibe light irradiation (λ max. = 515 nm). The safranine O is a heterocyclic azine group of dyes, which undergoes degradation on irradiation with visible light. The rate of degradation of safranine O was found to follow pseudo-first order kinetics. After irradiation for 4 hours, 96.8% of safranine O dye was degraded with addition of 4 g/L ammonium phosphomolybdate to solutions containing 0.0350 g/L of the safranine O. The influence of pH, semiconductor amount, safranine O concentration, and light intensity were investigated. The photodegradation was conducted in basic medium and at the room temperature. The present study suggested that this semiconductor plays an important role in the degradation of safranine O through photocatalysis. The mechanism of photocatalysis is discussed. Copyright © EM International. Source


Chaturvedi N.,Msj College | Sharma S.,Msj College | Sharma M.K.,Msj College | Chaturvedi R.K.,Msj College
Pollution Research | Year: 2011

The bleaching of orange G dye was carried out in the presence of semiconductor NiO. Visible light was used as the source of energy. Rate of photodegradation was followed spectrophotometrically. The effect of various parameters like pH, dye concentration, amount of semiconductor, light intensity etc. on the rate of reaction was observed. A tentative mechanism of the reaction has been proposed. Copyright © EM International. Source


Yogesh Sharma K.,Msj College | Prasad M.,Msj College
Oriental Journal of Chemistry | Year: 2012

A new tetradentate Bis-benzimidazole based ligand, N-Octyl-N,N'-Bis-(2- Methyl-Benzimidazoly)-benzene-1, 3-dicarboxamide(0-GBBA) has been synthesized and utilized to prepare Iron (III) complexes of general composition [Fe(0-GBBA)X2].X.nH2O where X is an exogenous anionic ligand (X=CI", NO3). These complexes were prepared in the molar ratios of metal: ligand (1:1) and characterized by elemental analysis, IR, UV spectroscopic and other analytical techniques. Cyclic voltammetric measurements of the complexes display quasi reversible redox wave due to the Iron (III)/Iron (II) process. The distorted octahedral geometry with monomeric composition was proposed for both theses complexes on the basis of these studies. These complexes have been screened for their antimicrobial activities against bacteria, Lactobacillus and fungi, A. Niger, Rhizopus & Mucer. These complexes were found to exhibit considerable antimicrobial activity. Source

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