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Title

Photocatalytic degradation of organic dyes by PEG and PVP capped Cu, Ni and Ag nanoparticles in the presence of NaBH۴ in aqueous medium

مجله بین المللی فناوری نانو در آب و محیط زیست، دوره: 5، شماره: 4
Year: 1399
COI: JR_JWENT-5-4_001
Language: EnglishView: 76
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Authors

Subramanian Kanchana - Department of Chemistry, Quaid-E-Millath Government College for Women (Aut.), Chennai-۶۰۰۰۰۲, India
Radhakrishnan Vijayalakshmi - Department of Chemistry, Quaid-E-Millath Government College for Women (Aut.), Chennai-۶۰۰۰۰۲, India

Abstract:

Photocatalysis mediated by metal nanoparticles is emerging as an effective method for removal of hazardous dye pollutants in natural aquatic bodies. Nanoparticles of Cu, Ni and Ag were synthesized by chemical method using PEG and PVP polymers as capping agents. Experimental photocatalyis was carried out in a one pot batch reactor using metal nanoparticle catalysts for degradation of crystal violet (CV), bromocresol green (BCG) and methylene blue (MB) in aqueous solution in the presence of NaBH۴ reductant independently under solar and UV irradiations at ۲۵oC. Metal nanoparticles caused the removal of BCG and CV in ۹۰-۱۲۰ min and MB in ۳۰-۶۰ min. Linear relationship between the irradiation time and the absorbance were recorded and the kinetic plots exhibited pseudo-first order kinetic. The trend of dye degradation among the nanoparticles based on the catalytic efficiency (c) and rate coefficient (k) values was Cu>Ag>Ni. Mineralization experiment indicated ۹۴, ۹۱ and ۹۰% of TOC removal ratio (R) respectively for CV, MB and BCG dyes. Nanoparticles stabilized using PEG demonstrated better catalytic efficiency than those with PVP. Solar irradiation showed superior augmenting effect on the nanoparticle catalysts than the UV irradiation. The electron-hole pair mediated reduction mechanism was proposed as a basis for photocatalytic degradation of dyes.

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This Paper COI Code is JR_JWENT-5-4_001. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1211426/

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Kanchana, Subramanian and Vijayalakshmi, Radhakrishnan,1399,Photocatalytic degradation of organic dyes by PEG and PVP capped Cu, Ni and Ag nanoparticles in the presence of NaBH۴ in aqueous medium,https://civilica.com/doc/1211426

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