Enhanced visible-light photocatalytic performance of a monolithic tungsten oxide/graphene oxide aerogel for nitric oxide oxidation

doi:10.1016/S1872-2067(17)62974-7

Abstract

Abstract:

Photocatalysis is considered a promising technique for removal of pollutants from indoor air. However, the low selectivity and limited recyclability of photocatalysts in powder form currently limit their practical application. In this work, we reported the successful preparation of a monolithic tungsten oxide (WO₃)/graphene oxide (GO) aerogel photocatalyst through a cost-effective freeze-drying method. GO not only acts as a macroscopic support, but also increases the catalyst surface area from 46 to 57 m²/g, enhances the light absorption in the visible-light region, and raises the separation efficiency of photogenerated electron-hole pairs. The Obtained WO₃/GO aerogel exhibited an outstanding visible-light photocatalytic degradation rate of nitric oxide of 51%, which was 3.3 times that of pristine WO₃ powder. In addition, the aerogel displayed excellent selectivity, with a generation fraction of toxic nitrogen dioxide of as low as 0.5%. This work presents a facile synthesis route to fabricate a monolithic WO₃/GO aerogel photocatalyst with great promise for air purification.

Key words: WO₃/GO aerogel, Photocatalysis, NO oxidation, Selectivity

Li Yang, Yang Liu, Ruiyang Zhang, Wei Li, Pu Li, Xin Wang, Ying Zhou. Enhanced visible-light photocatalytic performance of a monolithic tungsten oxide/graphene oxide aerogel for nitric oxide oxidation[J]. Chinese Journal of Catalysis, 2018, 39(4): 646-653.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(17)62974-7

https://www.cjcatal.com/EN/Y2018/V39/I4/646

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