Construction of ternary annular 2Z-scheme+1Heterojunction CuO/WO3/CdS/ photocatalytic system for methylene blue degradation with simultaneous hydrogen production
Construction of ternary annular 2Z-scheme+1Heterojunction CuO/WO3/CdS/ photocatalytic system for methylene blue degradation with simultaneous hydrogen production
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DOI：
10.1016/j.apsusc.2019.143843
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发表时间：
2019-12
影响因子：
6.7
通讯作者：
Di Wang;Jize Liu;Meng Zhang;Youtao Song;Zhaohong Zhang;Jun Wang
中科院分区：
文献类型：
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作者：
Di Wang;Jize Liu;Meng Zhang;Youtao Song;Zhaohong Zhang;Jun Wang
本文采用水热法和等电点法成功制备了一种三元环型两z - 1异质结光催化剂Δ（2Z + 1H）- CuO/WO3/CdS/。采用XRD、SEM、TEM、EDX、XPS、DRS、PL和电化学测试对样品进行了表征。通过光催化降解有机污染物并同时产氢，研究了光催化活性。与CuO/WO3、CdS/WO3和CuO/CdS相比，Δ（2Z + 1H）三元体系CuO/WO3/CdS光催化剂表现出最优的活性，这主要归因于三元环状结构（2Z + 1H）的构建。它能有效地促进光致电子与空穴的分离，提高光的利用效率。此外，还通过四次循环试验对其稳定性进行了验证。希望本研究能为同时快速产氢的有机污染物的有效降解提供一条有希望的途径。
In this work, a ternary annular twoZ-scheme and one Heterojunction photocatalyst, Δ(2Z + 1H)-scheme CuO/WO3/CdS/, was successfully prepared using hydrothermal and isoelectric point methods. The samples are characterized by XRD, SEM, TEM, EDX, XPS, DRS, PL and electrochemical tests. The photocatalytic activity is investigated through the photocatalytic degradation of organic pollutants with simultaneous hydrogen production. The ternary Δ(2Z + 1H)-scheme CuO/WO3/CdS/ photocatalyst exhibited an optimum activity, compared with CuO/WO3, CdS/WO3and CuO/CdS, which is attributed to the construction of the ternary annular (2Z + 1H)-scheme structure. It can effectively promote the separation of photo-induced electrons and holes and increase the utilization efficiency of light. In addition, the stability is tested by four cycle experiments. It is wished that this study could provide a promising pathway for effective degradation of organic pollutants with simultaneous and rapid hydrogen production.