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Photon-Free Degradation of Dyes by Ge/GeO2 Porous Microstructures

Shinde, SatishLaxman and Nanda, KarunaKar (2019) Photon-Free Degradation of Dyes by Ge/GeO2 Porous Microstructures. In: ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 7 (7). pp. 6611-6618.

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Official URL: http://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/GeO2 porous microstructures. The degradation efficiency and time are found to be dependent on the catalyst amount, and it is possible to achieve, similar to 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.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to AMER CHEMICAL SOC
Keywords: Photon-free; Catalysis; Microcrystals; Dyes; Germanium
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 13 May 2019 12:55
Last Modified: 13 May 2019 12:55
URI: http://eprints.iisc.ac.in/id/eprint/62324

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