A novel S-scheme heterojunction based on BiPO4/CdPSe3 for effective photocatalytic degradation of organic pollutants

As a sustainable technology that can be utilized for degrading organic pollutants, photocatalysis becomes more and more important in the environment pollution control. One crucial factor that influences the degradation process is the design of photocatalyst. In this study, we utilized a simple hydro...

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Veröffentlicht in:Journal of alloys and compounds 2025-01, Vol.1010, p.177491, Article 177491
Hauptverfasser: Li, Yuting, Song, Jiaming, Yang, Juanjuan, Wang, Zhuo, Ban, Guoshuai, Gao, Huaxiong, Ye, Honggang, Teng, Feng, Zhao, Xin
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Sprache:eng
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Zusammenfassung:As a sustainable technology that can be utilized for degrading organic pollutants, photocatalysis becomes more and more important in the environment pollution control. One crucial factor that influences the degradation process is the design of photocatalyst. In this study, we utilized a simple hydrothermal method, liquid exfoliation and mechanical mixture to synthesize a novel S-scheme heterojunction based on BiPO4/CdPSe3. It was found that the optimal molar ratio BiPO4: CdPSe3 = 2: 1 (noted as B2C) gave rise to an efficient removal of rhodamine B up to 97.5 % after 30 min dark reaction and 60 min light exposure. This composite also possesses the degradation capacity for other antibiotics and inorganic pollutant. The capture experiments showed that superoxide radicals played the dominant role in the degradation process. Besides, hydroxyl radicals and holes were also important active species. The high photocatalytic degradation performance of B2C could be attributed to the increased specific surface area with more active sites, enhanced light absorption in the visible region, and, more importantly, the special S-scheme heterostructure for high photogenerated charge carrier separation, synergistically improved the photocatalyst degradation efficiency. This work provides a new perspective for designing high-efficient photocatalysts applicable in multiple organic and inorganic pollutants degradation. [Display omitted] •A novel S-scheme heterojunction BiPO4/CdPSe3 with high photocatalytic performance.•The removal efficiency of rhodamine B reached 97.5 % after 60 min illumination.•Multiple pollutants could be degraded by BiPO4/CdPSe3 in photocatalytic process.•Capture experiments revealed the possible active species in the degradation.•Synergistic effect enhanced the photocatalytic efficiency of BiPO4/CdPSe3.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2024.177491