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Deepak Pathania,Gaurav Sharma,Mu. Naushad,Amit Kumar 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
A nanocomposite cation exchanger polyacrylamide Ce(IV) silicophosphate (PAM–CSP)was prepared via sol–gel method. The ion exchange capacity of nanocomposite PAM–CSP was found better (1.42 mequiv. g-1) than its inorganic counterpart Ce(IV) silicophosphate (CSP, 0.84 mequiv. g-1). The material was characterized using different techniques such as FTIR, XRD, SEM and TEM. The various physiochemical properties such as pH titration, elution concentration and elution behavior studies of PAM–CSP were studied. The pH titration studies clearly indicated the bifunctional nature of nanocomposite ion exchanger. The effect of temperature on the ion exchange capacity of the material was also investigated. The photocatalytic activity of PAM–CSP was investigated for the degradation of methylene blue dye which revealed that 83.40% of MB was degraded in 5 h. The antimicrobial activities of PAM–CSP were also ascertained against Escherichia coli and Staphylococcus aureus.
Supriya Deepak Patil,Rajnikant Sharma,Tapas Bhattacharyya,Piyush Kumar,Manasi Gupta,Bhupinder Singh Chaddha,Naveen Kumar Navani,Ranjana Pathania 한국미생물학회 2015 The journal of microbiology Vol.53 No.9
Infirmity and death from diseases caused by unsafe food are a continual hazard to communal health safety and socio-economic growth throughout the world. Chemical preservatives are associated with health hazards and toxicity issues. In the study reported here, 200 soil isolates from Western Himalayan region in India were screened for potential antibacterial activity against food-borne pathogens. This study led to the isolation of a bacterial strain belonging to the Genus Bacillus and was designated as RPT-0001. The associated antibacterial activity was sensitive to pronase E treatment. Bioassay-guided fractionation using reverse phase high performance liquid chromatography (RP-HPLC) led to isolation of the antibacterial peptide designated as RPT-0001. The molecular weight of RPT-0001 was determined by electro- spray ionization mass spectroscopy (ESI-MS) as 276.9 Da. RPT-0001 was inhibitory to both Gram-negative and Grampositive food-borne bacteria tested. The characteristics of RPT-0001 do not match with that of any other known antibacterial peptides produced by Bacillus sp. or related genera. Purified RPT-0001 was successfully used in synthesis of silver nanoparticles effective against food-borne pathogenic bacteria. The antibacterial peptide and silver nanoparticles synthesized utilizing it as a capping and reducing agent hold promising potential in food preservation, in packaging material and as a therapeutic agent in the treatment of foodborne infections.
Gaurav Sharma,Deepak Pathania,Mu. Naushad 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
A new bio-polymer based nanocomposite, pectin zirconium(IV) selenotungstophosphate (Pc/ZSWP) wasprepared via sol–gel method. The material was characterized using scanning electron microscopy, X-raydiffraction, transmission electron microscopy and Fourier transform infrared spectroscopy. Distributioncoefficient, thermal stability, elution behavior and pH titrations were investigated to explore the ionexchange behavior of nanocomposite. Pc/ZSWP exhibited higher ion exchange capacity (1.27 meq g-1)than its inorganic counterpart (0.67 meq g-1). To explore environmental applicability of the Pc/ZSWP,binary separation and selective separation of Cu2+ and Th4+ from synthetic mixtures of metal ions wereachieved. Antimicrobial activity of the Pc/ZSWP was also investigated.
Rishu Katwal,Deepak Pathania,Mu. Naushad,Harpreet Kaur,Gaurav Sharma 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.31 No.-
The electrochemical method has been investigated for the synthesis of copper oxide nanoparticles (CuONPs) under different reaction conditions. The CuO NPs were used as excellent photocatalyst for thedegradation of different organic dyes under the illumination of sunlight irradiation. The highestdegradation was 93% for methylene blue. The rate constant for MB, MR, and CR was found to be first-order with values 0.02059, 0.02046, and 0.01749 min 1, respectively. The antimicrobial efficiency of CuONPs was investigated against bacterial strains (Escherichia coli and Staphylococcus aureus) and fungalstrains (Aspergillus nigres and Candida albicans).
Vinod Kumar Gupta,Gaurav Sharma,Deepak Pathania,N.C. Kothiyal 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
A pectin zirconium (IV) selenotungstophosphate (Pc/ZSWP) nanocomposite was prepared via sol–gelmethod. The material was characterized using different techniques such as FTIR, SEM and TEM. Theadsorptional/photocatalytic activity of Pc/ZSWP was investigated for the removal of methylene blue andmalachite green dyes in two different conditions. It was revealed that the synergistic adsorptional/photocatalytic degradation of dyes was more efficient than mere adsorption in dark followed byphotocatalysis. The photocatalytic degradation percentage of MB and MG dyes onto Pc/ZSWPnanocomposite was found out to be 89.21 and 79.27% in 3 h of photo irradiation which is higherthan for adsorption in dark followed by photocatalysis. The antimicrobial activity of Pc/ZSWP was alsoascertained against Escherichia coli.
Gaurav Sharma,Amit Kumar,Mu. Naushad,Deepak Pathania,Mika Sillanpaa 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.33 No.-
Polyacrylamide Zr(IV) vanadophosphate (PAM/ZVP) nanocomposite was synthesized via simple sol–gelmethod. The synthesized PAM/ZVP nanocomposite was studied for its ion exchange properties. Thenanocomposite showed higher ion exchange capacity (IEC) compared to its inorganic counterpart Zr(IV)vanadophosphate (ZVP). The nanocomposite was well characterized using various techniques viz.-TEM,SEM, XRD, and FTIR. The PAM/ZVP showed promising photocatalytic nature for degradation of Congo reddye under sunlight. The enhanced dye remediation was observed as material behaved as adsorbent andphotocatalyst simultaneously under coupled conditions in dye removal experiments. Thus, PAM/ZVP is aprobable superior hybrid photo catalyst for dye waste treatment