S-scheme carbon doped-TiO2/ZnIn2S4 heterojunction for enhanced photocatalytic degradation of microcystin-LR and hydrogen evolution

被引：1
作者：
Wang, Xiaotong [1 ,2 ]
Ding, Lin [1 ,2 ]
Li, Xibao [2 ]
Wang, Zhenzhou [1 ,2 ]
Xu, Xiwei [1 ,2 ]
Deng, Fang [1 ,2 ]
Luo, Xubiao [1 ,2 ,3 ]
机构：
[1] Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang
[2] National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang
[3] School of Life Science, Jinggangshan University, Ji'an
来源：
Chemosphere | 2024年 / 363卷
基金：
中国国家自然科学基金;
关键词：
C-TiO[!sub]2[!/sub]/ZnIn[!sub]2[!/sub]S[!sub]4[!/sub; Degradation of microcystin-LR; Hydrogen production; Internal electric field; S-scheme heterojunction;
D O I：
10.1016/j.chemosphere.2024.142996
中图分类号：
学科分类号：
摘要：
Photocatalytic degradation of pollutants coupled with hydrogen (H2) evolution has emerged as a promising solution for environmental and energy crises. However, the fast recombination of photoexcited electrons and holes limits photocatalytic activities. Herein, an S-scheme heterojunction carbon doped-TiO2/ZnIn2S4 (C–TiO2/ZnIn2S4) was designed by substituting oxygen sites within C–TiO2 by ZnIn2S4. Under visible light irradiation, the optimal C–TiO2/ZnIn2S4 exhibits a higher degradation efficiency (88.6%) of microcystin-LR (MC-LR), compared to pristine C–TiO2 (72.9%) and ZnIn2S4 (66.8%). Furthermore, the H2 yield of the C–TiO2/ZnIn2S4 reaches 1526.9 μmol g−1 h−1, which is 3.83 times and 2.87 times that of the C–TiO2 and ZnIn2S4, respectively. Experimental and theoretical investigations reveal that an internal electric field (IEF) informed in the C–TiO2/ZnIn2S4 heterojunction, accelerates the separation of photogenerated charge pairs, thereby enhancing photocatalytic efficiency of MC-LR degradation and H2 production. This work highlights a new perspective on the development of high-performance photocatalysts for wastewater treatment and H2 generation. © 2024 Elsevier Ltd
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  • [1] Ai Y., Hu J., Xiong X., Et al., Synergistic interfacial engineering of a S-scheme ZnO/In<sub>2</sub>S<sub>3</sub> photocatalyst with S-O covalent bonds: a dual-functional advancement for tetracycline hydrochloride degradation and H<sub>2</sub> evolution, Appl. Catal., B: Environment and Energy, 353, (2024)
  • [2] Alam U., Khan A., Raza W., Et al., Highly efficient Y and V co-doped ZnO photocatalyst with enhanced dye sensitized visible light photocatalytic activity, Catal. Today, 284, pp. 169-178, (2017)
  • [3] Cao H., Liu F., Tai Y., Et al., Promoting photocatalytic performance of TiO<sub>2</sub> nanomaterials by structural and electronic modulation, Chem. Eng. J., 466, (2023)
  • [4] Chen F., Yang Q., Wang Y., Et al., Novel ternary heterojunction photcocatalyst of Ag nanoparticles and g-C<sub>3</sub>N<sub>4</sub> nanosheets co-modified BiVO<sub>4</sub> for wider spectrum visible-light photocatalytic degradation of refractory pollutant, Appl. Catal. B Environ., 205, pp. 133-147, (2017)
  • [5] Chen G.B., Ding X.M., Zhou W., Study on ultrasonic treatment for degradation of microcystins (MCs), Ultrason. Sonochem., 63, (2020)
  • [6] Dong P., Hou G., Xi X., Et al., WO<sub>3</sub>-based photocatalysts: morphology control, activity enhancement and multifunctional applications, Environ. Sci.: Nano, 4, 3, pp. 539-557, (2017)
  • [7] Eljamal O., Eljamal R., FalyouJna O., Et al., Exceptional contribution of iron nanoparticle and Aloe vera biomass additives to biogas production from anaerobic digestion of waste sludge, Energy, 302, (2024)
  • [8] Fan G., Lin X., You Y., Et al., Magnetically separable ZnFe<sub>2</sub>O<sub>4</sub>/Ag<sub>3</sub>PO<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> photocatalyst for inactivation of Microcystis aeruginosa: characterization, performance and mechanism, J. Hazard Mater., 421, (2022)
  • [9] Fu Q., Mu Y., Yang L., Et al., Hydroxyl radical streaming from molecular oxygen activation by β-FeC<sub>2</sub>O<sub>4</sub>·2H<sub>2</sub>O for efficiently degrading Microcystin-LR, Appl. Catal. B Environ., 321, (2023)
  • [10] He R., Wang Z., Deng F., Et al., Tunable Bi-bridge S-scheme Bi<sub>2</sub>S<sub>3</sub>/BiOBr heterojunction with oxygen vacancy and SPR effect for efficient photocatalytic reduction of Cr (VI) and industrial electroplating wastewater treatment, Separ. Purif. Technol., 311, (2023)
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