Performance study of g‑C3N4/carbon black/BiOBr@Ti3C2/MoS2 photocatalytic fuel cell for the synergistic degradation of different types of pollutants

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters / 33권 / 3호
ㆍ저자명 : Huilin Guo, Tingting Yu, Lei Zhao, Jun Qian, Jiahe Yu, Yu Zhang, Yongyue Teng, Chunshui Zhu, Tao Yang, Wenbin Chen, Picheng Gong, Cuishuang Jiang, Changfei Gao, Bing Yang, Chenyu Yang

목차

Performance study of g-C3N4carbon blackBiOBr@Ti3C2MoS2 photocatalytic fuel cell for the synergistic degradation of different types of pollutants
Abstract
1 Introduction
2 Experimental section
2.1 Materials
2.2 Preparation of photocatalysts
2.2.1 g-C3N4
2.2.2 BiOBr
2.2.3 g-C3N4BiOBr
2.2.4 Ti3C2
2.2.5 MoS2
2.2.6 Ti3C2MoS2
2.3 Preparation of the photoanode and photocathode
2.4 Construction of the PFC system
2.5 Characterization
2.6 Photoelectrochemical analysis
2.7 Performance evaluation of the PFC
3 Results and discussion
3.1 Characterization of photoelectrodes
3.2 Electrochemical performance analysis
3.3 Influence of different specific gravity of photoanode materials and the external resistance on degradation effect
3.4 Influence of different concentrations of TCH and the photoelectrode on the pollutants degradation rate
3.5 Influence of light and aeration on the effect of the PFC
3.6 The performance comparison of the PFC with the photocatalyst
3.7 Electron transport and pollutant degradation mechanism in the PFC
4 Conclusions
Anchor 27
Acknowledgements
References

영어 초록

In this study, a bipolar visible light responsive photocatalytic fuel cell (PFC) was constructed by loading a Z-scheme g-C3N4/ carbon black/BiOBr and a Ti3C2/ MoS2 Schottky heterojunction on the carbon brush to prepare the photoanode and photocathode, respectively. It greatly improved the electron transfer and achieved efficient degradation of organic pollutants such as antibiotics and dyes simultaneously in two chambers of the PFC system. The Z-scheme g-C3N4/carbon black/BiOBr formed by adding highly conductive carbon black to g-C3N4/BiOBr not only effectively separates the photogenerated carriers, but also simultaneously retains the high reduction of the conduction band of g-C3N4 and the high oxidation of the valence band of BiOBr, improving the photocatalytic performance. The exceptional performance of Ti3C2/ MoS2 Schottky heterojunction originated from the superior electrical conductivity of Ti3C2 MXene, which facilitated the separation of photogenerated electron–hole pairs. Meanwhile, the synergistic effect of the two photoelectrodes further improved the photocatalytic performance of the PFC system, with degradation rates of 90.9% and 99.9% for 50 mg L− 1 tetracycline hydrochloride (TCH) and 50 mg L− 1 rhodamine-B (RhB), respectively, within 180 min. In addition, it was found that the PFC also exhibited excellent pollutant degradation rates under dark conditions (79.7%, TCH and 97.9%, RhB). This novel pollutant degradation system is expected to provide a new idea for efficient degradation of multiple pollutant simultaneously even in the dark.

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