Phenomenal Insight into Electrochemically Induced Photocatalytic Degradation of Nitrobenzene on Variant Au-Modified TiO2 Nanotubes

Author:

Wang Meng1,Li Chaoying12,Wang Yingdong2,Gu Di2,Wang Baohui1

Affiliation:

1. Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China

2. National Key Laboratory of Continental Shale Oil, Northeast Petroleum University, Daqing 163318, China

Abstract

TiO2 nanotubes are a prominent type of TiO2-based nanostructure compared to nanorod arrays. A promising way to improve photocatalytic performance is modifying TiO2 nanotubes with metals, either on the surface or inside the tubes. There is a substantial demand for enhancing the conductivity and charge separation of TiO2 nanotubes, with a major focus on gold (Au) modification. Gold (Au) coatings have significantly improved the photocatalytic activity of TiO2 nanotubes, particularly in pollutant oxidation. However, the mechanism underlying the action of Au-modified TiO2 nanotubes in photocatalytic nitrobenzene oxidation under electrochemical induction remains unclear. Therefore, we conducted related experiments to explore the optimal Au concentration under various conditions. Under electric field induction, the maximum removal rate achieved was 54.9%. Lastly, we analyzed the relevant photocatalytic mechanism to elucidate the responses of electrons and holes to a simulated contaminant under a photo-electrochemical field.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Heilongjiang Province

Postdoctoral scientific Research developmental fund of Heilongjiang Province

Foundation of Northeast Petroleum University

Publisher

MDPI AG

Subject

Physical and Theoretical Chemistry,Catalysis,General Environmental Science

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