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Photon-Free Degradation of Dyes by Ge/GeO 2 Porous Microstructures

Shinde, SL and Nanda, KK (2019) Photon-Free Degradation of Dyes by Ge/GeO 2 Porous Microstructures. In: ACS Sustainable Chemistry and Engineering .

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Official URL: https://dx.doi.org/10.1021/acssuschemeng.8b05549

Abstract

Several industries use dyes as coloring agents and release untreated effluents in the form of wastewater that has created panic due to the environmental issue. Considerable efforts have been extended to develop photocatalysts for the degradation of these dyes. Here, we report the photon-free degradation of various cationic and anionic dyes for the first time by Ge/GeO 2 porous microstructures. The degradation efficiency and time are found to be dependent on the catalyst amount, and it is possible to achieve �100 degradation without any external stimuli. Our experimental results indicate that Ge donates electrons either directly to dye molecules or to dissolved oxygen (O 2 ) molecules and creates superoxide species without any extra energy source that bleaches or degrades the dyes. However, it is essential to have a continuous supply of electrons from Ge core to sustain the degradation process. © Copyright 2019 American Chemical Society.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to American Chemical Society
Keywords: Catalysis; Degradation; Dissolved oxygen; Effluents; Germanium; Microcrystals; Microstructure; Molecules; Photons, Cationic and anionic dyes; Coloring agents; Degradation efficiency; Degradation process; Energy source; Environmental issues; External stimulus; Porous microstructure, Dyes
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 16 Apr 2019 06:29
Last Modified: 16 Apr 2019 06:29
URI: http://eprints.iisc.ac.in/id/eprint/62108

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