单晶WO3/红磷S型异质结的构建及光催化活性研究

doi:10.15541/jim20220478

无机材料学报 ›› 2023, Vol. 38 ›› Issue (6): 701-707.DOI: 10.15541/jim20220478

单晶WO₃/红磷S型异质结的构建及光催化活性研究

吐尔洪·木尼热¹(), 赵红刚¹^,²(), 马玉花¹^,²(), 齐献慧¹, 李钰宸¹, 闫沉香¹, 李佳文¹, 陈平¹

1.新疆师范大学化学化工学院, 乌鲁木齐 830054
2.新疆师范大学新疆储能与光电催化材料重点实验室, 乌鲁木齐 830054

收稿日期:2022-08-11 修回日期:2022-10-17 出版日期:2022-11-16 网络出版日期:2022-11-16
通讯作者: 赵红刚, 讲师. E-mail: 262385441@qq.com;
马玉花, 副教授. E-mail: 15199141253@163.com

Construction and Photocatalytic Activity of Monoclinic Tungsten Oxide/Red Phosphorus Step-scheme Heterojunction

TUERHONG Munire¹(), ZHAO Honggang¹^,²(), MA Yuhua¹^,²(), QI Xianhui¹, LI Yuchen¹, YAN Chenxiang¹, LI Jiawen¹, CHEN Ping¹

1. College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi 830054, China
2. Xinjiang Key Laboratory of Energy Storage and Photoelectrocatalytic Materials, Xinjiang Normal University, Urumqi 830054, China

Received:2022-08-11 Revised:2022-10-17 Published:2022-11-16 Online:2022-11-16
Contact: ZHAO Honggang, lecturer. E-mail: 262385441@qq.com;
MA Yuhua, associate professor. E-mail: 15199141253@163.com
Supported by:
National Natural Science Foundation of China(22208275);National Natural Science Foundation of China(52063028);College Students’ Innovative Entrepreneurial Training(S202210762003);College Students’ Innovative Entrepreneurial Training(X202210762017);College Students’ Innovative Entrepreneurial Training(X202210762123);PhD Startup Fund of Xinjiang Normal University(XJNUBS1907);Innovation Team for Monitoring of Emerging Contaminants and Biomarkers(2021D14017)

摘要/Abstract

摘要：

S型异质结被广泛应用于光解水产氢和解决环境污染问题。本研究通过简单的水热法制备了单晶WO₃/水热处理后的红磷(HRP)复合材料。XPS和EPR等表征结果证实单晶WO₃/HRP复合材料形成了S型异质结。5%WO₃/HRP异质结复合物在可见光下展现出最佳的光催化活性, 在4 min内对罗丹明B(RhB)的降解率高达97.6%。此外, 制氢速率可以达到870.69 μmol·h^-1·g^-1, 是纯HRP的3.62倍。这可归功于单晶WO₃和HRP之间形成紧密的S型异质结, 使其光生载流子快速分离并提高氧化还原能力。本研究制备的RP基光催化剂为解决日益增长的清洁新能源和饮用水需求提供了参考。

关键词: WO₃, 红磷, 光解水产氢, S型异质结

Abstract:

S-scheme heterojunction has been extensively investigated for hydrogen evolution and environmental pollution issues. In this study, a monoclinic WO₃/hydrothermally treated red phosphorus (HRP) S-scheme composite was prepared by hydrothermal method. XPS and EPR characterization confirmed that the monoclinic WO₃/HRP composite formed S-scheme heterojunction. 5%WO₃/HRP composite displayed the optimal photocatalytic activity under visible light irradiation, and its degradation rate of Rhodamine B (RhB) reached 97.6% after 4 min of visible light irradiation, while its hydrogen evolution rate reached 870.69 μmol·h^-1·g^-1 which was 3.62 times of that of pure HRP. This could be ascribed to the tight interfacial bonding between WO₃ and HRP, and the formation of S-scheme heterostructure, enabling rapid separation of photogenerated carriers and therefore improving the strong redox capacity. This study provided a promising RP-based photocatalyst to meet the demand for clean energy and drinking water.

Key words: WO₃, red phosphorus, photocatalytic hydrogen evolution, S-scheme heterojunction

中图分类号:

O643

吐尔洪·木尼热, 赵红刚, 马玉花, 齐献慧, 李钰宸, 闫沉香, 李佳文, 陈平. 单晶WO₃/红磷S型异质结的构建及光催化活性研究[J]. 无机材料学报, 2023, 38(6): 701-707.

TUERHONG Munire, ZHAO Honggang, MA Yuhua, QI Xianhui, LI Yuchen, YAN Chenxiang, LI Jiawen, CHEN Ping. Construction and Photocatalytic Activity of Monoclinic Tungsten Oxide/Red Phosphorus Step-scheme Heterojunction[J]. Journal of Inorganic Materials, 2023, 38(6): 701-707.

图/表 11

Fig. 1 XRD patterns of HRP, WO3 and 5%WO3/HRP composite

Fig. 2 TEM images of (a, b) HRP, (c, d) WO3 and (e, f) 5%WO3/HRP composite

Fig. 3 (a) P2p and (b) W4f XPS spectra of samples

Fig. 4 (a) Photodegradation curves, (b) rate curves, and (c) hydrogen production rates of HRP, WO3, 3%WO3/HRP, 5%WO3/HRP, and 7%WO3/HRP composites

Fig. 5 (a) UV-Vis DRS spectra of HRP, WO3 and 5%WO3/HRP composite, (b) Tauc plots of HRP and WO3, and (c) I-t curves of HRP, WO3 and 5%WO3/HRP composite

Fig. 6 (a) EIS spectra of HRP, WO3 and 5%WO3/HRP composite, (b) Mott-Schottky curves of HRP and WO3, and (c) EPR spectra of HRP, WO3 and 5%WO3/HRP composite

Fig. 7 Photocatalytic mechanism of the WO3/HRP composite (a) Before contact; (b) After contact in darkness; (c) S-scheme transfer process of photogenerated carriers under visible light irradiation

Fig. S1 FT-IR spectra of HRP, WO3 and 5%WO3/HRP composite

Fig. S2 SEM images of (a, d) HRP, (b, e) WO3, (c, f) 5%WO3/HRP composite, and (g) corresponding elemental mapping of P, O and W, and (h) EDS spectra of 5%WO3/HRP composite

Fig. S3 (a) XPS survey spectra of HRP, WO3, 5%WO3/HRP composite, (b) cycling performance of RhB photodegradation by 5%WO3/HRP composite and (c) PL spectra of HRP, WO3, 5%WO3/HRP composite

Fig. S4 EIS Bode plots of (a) HRP and (b) 5%WO3/HRP composite

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单晶WO₃/红磷S型异质结的构建及光催化活性研究

Construction and Photocatalytic Activity of Monoclinic Tungsten Oxide/Red Phosphorus Step-scheme Heterojunction

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