{"title":"In-situ construction of N-doped Zn0.6Cd0.4S/oxygen vacancy-rich WO3 Z-scheme heterojunction compound for boosting photocatalytic hydrogen production","authors":"","doi":"10.1016/j.jcis.2024.09.012","DOIUrl":null,"url":null,"abstract":"<div><p>Photocatalytic water splitting technology for H<sub>2</sub> production represents a promising and sustainable approach to clean energy generation. In this study, a high concentration of oxygen vacancies was introduced into tungsten trioxide (WO<sub>3</sub>) to create a vacancy-rich layer. This modified WO<sub>3</sub> (WO<sub>3-x</sub>) was then combined with <em>N</em>-doped Zn<sub>0.6</sub>Cd<sub>0.4</sub>S through a hydrothermal synthesis, resulting in the formation of a Z-scheme heterojunction composite aimed at enhancing photocatalytic performance. Under visible light, the H<sub>2</sub> production activity of the composite reached an impressive 8.52 mmol·g<sup>−1</sup> without adding co-catalyst Pt. This corresponds to enhancements of 7.82 and 4.39 times the production yield of pure ZCS and ZCSN, respectively. However, the hydrogen production increased to 21.98 mmol·g<sup>−1</sup> when Pt was added as a co-catalyst. Furthermore, an array of characterizations were employed to elucidate the presence of oxygen vacancies and the establishment of the Z-scheme heterojunction. This structural enhancement significantly facilitates the utilization of photo-generated electrons while effectively preventing photo-corrosion of ZCSN, thus improving material stability. Our study provides a new scheme for the incorporation of oxygen-rich vacancy and the construction of Z-scheme heterojunction, demonstrating a synergistic effect that greatly advances photocatalytic performance.</p></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":null,"pages":null},"PeriodicalIF":9.4000,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Colloid and Interface Science","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S002197972402068X","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Photocatalytic water splitting technology for H2 production represents a promising and sustainable approach to clean energy generation. In this study, a high concentration of oxygen vacancies was introduced into tungsten trioxide (WO3) to create a vacancy-rich layer. This modified WO3 (WO3-x) was then combined with N-doped Zn0.6Cd0.4S through a hydrothermal synthesis, resulting in the formation of a Z-scheme heterojunction composite aimed at enhancing photocatalytic performance. Under visible light, the H2 production activity of the composite reached an impressive 8.52 mmol·g−1 without adding co-catalyst Pt. This corresponds to enhancements of 7.82 and 4.39 times the production yield of pure ZCS and ZCSN, respectively. However, the hydrogen production increased to 21.98 mmol·g−1 when Pt was added as a co-catalyst. Furthermore, an array of characterizations were employed to elucidate the presence of oxygen vacancies and the establishment of the Z-scheme heterojunction. This structural enhancement significantly facilitates the utilization of photo-generated electrons while effectively preventing photo-corrosion of ZCSN, thus improving material stability. Our study provides a new scheme for the incorporation of oxygen-rich vacancy and the construction of Z-scheme heterojunction, demonstrating a synergistic effect that greatly advances photocatalytic performance.
原位构建掺杂 N 的 Zn0.6Cd0.4S/ 富氧空位 WO3 Z 型异质结化合物,促进光催化制氢。
用于生产 H2 的光催化水分离技术是一种前景广阔的可持续清洁能源生产方法。在这项研究中,在三氧化钨(WO3)中引入了高浓度的氧空位,以形成富空位层。然后,通过水热合成法将这种改性 WO3(WO3-x)与掺杂 N 的 Zn0.6Cd0.4S 结合在一起,形成了一种 Z 型异质结复合材料,旨在提高光催化性能。在不添加助催化剂铂的情况下,该复合材料在可见光下的产氢活性达到了惊人的 8.52 mmol-g-1。然而,当加入铂作为助催化剂时,氢气产量增加到 21.98 mmol-g-1。此外,还采用了一系列表征方法来阐明氧空位的存在和 Z 型异质结的建立。这种结构的增强极大地促进了光生电子的利用,同时有效地防止了 ZCSN 的光腐蚀,从而提高了材料的稳定性。我们的研究为富氧空位的掺入和 Z 型异质结的构建提供了一种新的方案,展示了一种协同效应,大大提高了光催化性能。
期刊介绍:
The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality.
Emphasis:
The journal emphasizes fundamental scientific innovation within the following categories:
A.Colloidal Materials and Nanomaterials
B.Soft Colloidal and Self-Assembly Systems
C.Adsorption, Catalysis, and Electrochemistry
D.Interfacial Processes, Capillarity, and Wetting
E.Biomaterials and Nanomedicine
F.Energy Conversion and Storage, and Environmental Technologies