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- 저자 : Navinchandra Shah (검색결과 2 건)
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High performance visible light photocatalysis of electrospun PAN/ZnO hybrid nanofibers
Akshara P. Shah,Shilpa Jain,Vinod J. Mokale,Navinchandra G. Shimpi 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
ZnO nanorods (NRs) immobilized PAN nanofibers were prepared using electrospinning technique. ZnOwere dispersed uniformly, which helps to overcome the difficult recycling of powder catalyst. The asobtainedfibers were characterized with wide-angle powder X-ray diffraction (XRD), scanning electronmicroscopy (SEM), transmission electron microscope (TEM), Fourier transform infrared spectroscopy(FTIR), UV-vis diffuse reflectance spectrophotometry (UV-vis-DRS), Thermogravimetry analysis (TGA), N2adsorption–desorption isotherms (BET), and X-ray photoelectron spectrometer (XPS). The morphologicalstudies revealed that ZnO NRs were aligned parallel to the axis offibers. PAN/ZnO hybrid NFs showsbetter regularity and uniformity in diameter (~800 nm) with large specific surface area and smaller energyband gap comparted to ZnO NRs. Under visible light irradiation, PAN/ZnO hybrid nanofibers have hadexcellent photocatalytic performances for the degradation of cationic MG dye (200 min, 99%) and anionicMO dye (280 min, 99%) respectively. Due to the electrostatic attraction between cationic dye and anionicPAN/ZnO, the degradation rate towards MG dye was higher than MO dye. Recyclability study shows thatafterfifth cycle, 93% efficiency was observed.
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Harshul Parekh,Kunwar Yadav,Sanjay Yadav,Navinchandra Shah 대한토목학회 2015 KSCE JOURNAL OF CIVIL ENGINEERING Vol.19 No.1
The management of municipal solid waste has become an acute problem due to enhanced economic activities and rapidurbanization. This paper aims to demonstrate the application of Analytical Hierarchy Process (AHP) to assign weightage of eachPerformance Indicator for Solid Waste Management (SWM). The AHP is a theory of measurement through pair-wise comparisonsand relies on the judgments of experts to derive priority scales. The degrading state of urban civic services requires immediatesolution to the problems related to mismanagement of urban waste. To evaluate performance of municipal waste management system44 indicators are identified by brainstorming sessions and structured interview, group discussions with experts. A questionnaire wasprepared for pairwise comparison of indicators. Judgment of experts through questionnaire is evaluated using AHP model to find outweights of indicators and sub-indicators. For application of prepared model, SWM System of two big cities of Gujarat; Ghaziabadand Surat have been studied and results are discussed. Our research findings will eventually lead to the identification of loop holes inSWM system.
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