Citation: Tingting Yu, Lifen Liu, Fenglin Yang. Heterojunction between anodic TiO₂/g-C₃N₄ and cathodic WO₃/W nano-catalysts for coupled pollutant removal in a self-biased system[J]. Chinese Journal of Catalysis, ;2017, 38(2): 270-277. doi: 10.1016/S1872-2067(16)62556-1 shu

Heterojunction between anodic TiO₂/g-C₃N₄ and cathodic WO₃/W nano-catalysts for coupled pollutant removal in a self-biased system

a Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China;
b School of Food and Environment, Dalian University of Technology, Panjin 124221, Liaoning, China

Received Date: 23 July 2016
Revised Date: 2 September 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21177018, 21677025) and the Program of Introducing Talents of Discipline to Universities (B13012).

An anodic TiO₂/g-C₃N₄ hetero-junction and cathodic WO₃/W were used to build a self-sustained catalytic fuel cell system for oxidizing rhodamine B or triclosan and reducing NO₃^--N to N₂ simultaneously. The WO₃ nano-catalyst was formed in situ by heating and oxidizing a tungsten wire in air. Cyclic voltammetry and current-time curves were used to characterize the electrochemical properties of the electrodes and system. Aeration and activation of molecular oxygen by self-biased TiO₂/g-C₃N₄ led to the formation of reactive oxidizing species in the fuel cell. The mechanism of simultaneous anodic oxidation of pollutants and cathodic reduction of nitrate was proposed. The spontaneously formed circuit and tiny current were used simultaneously in treating two kinds of wastewater in the reactor chambers, even without light illumination or an external applied voltage. This new catalytic pollution control route can lower energy consumption and degrade many other kinds of pollutants.
- Self-biased system,
- Hetero-junction,
- No light irradiation,
- Low energy consumption,
- Pollutant degradation
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通讯作者: 陈斌, bchen63@163.com

Heterojunction between anodic TiO₂/g-C₃N₄ and cathodic WO₃/W nano-catalysts for coupled pollutant removal in a self-biased system