Diffused sunlight driven highly synergistic pathway for complete mineralization of organic contaminants using reduced graphene oxide supported photocatalyst

Journal of Hazardous Materials
Sundaram Ganesh BabuMuthupandian Ashokkumar

Abstract

Diffused sunlight is found to be an effective light source for the efficient degradation and mineralization of organic pollutant (methyl orange as a probe) by sono-photocatalytic degradation using reduced graphene oxide (rGO) supported CuO-TiO2 photocatalyst. The prepared catalysts are characterized by XRD, XPS, UV-vis DRS, PL, photoelectrochemical, SEM-EDS and TEM. A 10 fold synergy is achieved for the first time by combining sonochemical and photocatalytic degradation under diffused sunlight. rGO loading augments the activity of bare CuO-TiO2 more than two fold. The ability of rGO in storing, transferring, and shuttling electrons at the heterojunction between TiO2 and CuO facilitates the separation of photogenerated electron-hole pairs, as evidenced by the photoluminescence results. The complete mineralization of MO and the by-products within a short span of time is confirmed by TOC analysis. Further, hydroxyl radical mediated degradation under diffused sunlight is confirmed by LC-MS. This system shows similar activity for the degradation of methylene blue and 4-chlorophenol indicating the versatility of the catalyst for the degradation of various pollutants. This investigation is likely to open new possibilities for the deve...Continue Reading

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Citations

Sep 14, 2016·Ultrasonics Sonochemistry·Tayyebeh Soltani, Byeong-Kyu Lee
Oct 7, 2016·Topics in Current Chemistry·Sundaram Ganesh BabuBernaurdshaw Neppolian
Jan 26, 2016·Physical Chemistry Chemical Physics : PCCP·Ramalingam VinothMuthupandian Ashokkumar
Oct 31, 2017·Environmental Science and Pollution Research International·Puthiya Veetil Nidheesh
Feb 6, 2021·Journal of Hazardous Materials·Jayaraman TheerthagiriMyong Yong Choi

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