Qianqian Wu , Dandan Lv , Tianyu Hu , Li Li , Wengjing Zhang , Hanxu Wang , Qianyin Gao , Zhining Zhao
{"title":"Enhanced photocatalytic performance of gully-like AgI/Cu–TiO2 composites with synergistic effects of phase junction and S-scheme heterojunction","authors":"Qianqian Wu , Dandan Lv , Tianyu Hu , Li Li , Wengjing Zhang , Hanxu Wang , Qianyin Gao , Zhining Zhao","doi":"10.1016/j.jpcs.2025.113197","DOIUrl":null,"url":null,"abstract":"<div><div>Using polystyrene (PS) spheres as templates, Cu–TiO<sub>2</sub>(G) photocatalysts with gully structures were prepared by the sol–gel and ion doping method. AgI/Cu–TiO<sub>2</sub>(G) composites were then successfully prepared via AgI nanoparticles depositing on Cu–TiO<sub>2</sub>(G) composites in situ. The characterization results show that the composite material presents uneven gully morphology, and gully widths is uniform and neatly arranged. Cu doping and AgI loading cooperatively improve the visible light absorption of AgI/Cu–TiO<sub>2</sub>(G) composite and reduce the band gap energy of the material. In addition, in AgI/Cu–TiO<sub>2</sub>(G) composites, anatase TiO<sub>2</sub> forms phase junctions and heterojunctions with rutile TiO<sub>2</sub> and AgI, respectively, which improve the separation and migration efficiency of photogenerated carriers. AgI/Cu–TiO<sub>2</sub>(G) composites exhibit excellent photocatalytic activity in the multi-mode photocatalytic degradation reaction. Meanwhile, this composite material demonstrates a higher catalytic activity in the photocatalytic water decomposition for hydrogen production experiments under simulated sunlight irradiation, and its hydrogen production rate is approximately 10.8 times that of pure TiO<sub>2</sub>. The charge separation efficiency is enhanced because the S-scheme heterojunction is constructed between AgI and TiO<sub>2</sub>, and the homojunction is formed between the anatase and rutile phases of TiO<sub>2</sub>, which further improving the photocatalytic performance.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"208 ","pages":"Article 113197"},"PeriodicalIF":4.9000,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics and Chemistry of Solids","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S002236972500650X","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Using polystyrene (PS) spheres as templates, Cu–TiO2(G) photocatalysts with gully structures were prepared by the sol–gel and ion doping method. AgI/Cu–TiO2(G) composites were then successfully prepared via AgI nanoparticles depositing on Cu–TiO2(G) composites in situ. The characterization results show that the composite material presents uneven gully morphology, and gully widths is uniform and neatly arranged. Cu doping and AgI loading cooperatively improve the visible light absorption of AgI/Cu–TiO2(G) composite and reduce the band gap energy of the material. In addition, in AgI/Cu–TiO2(G) composites, anatase TiO2 forms phase junctions and heterojunctions with rutile TiO2 and AgI, respectively, which improve the separation and migration efficiency of photogenerated carriers. AgI/Cu–TiO2(G) composites exhibit excellent photocatalytic activity in the multi-mode photocatalytic degradation reaction. Meanwhile, this composite material demonstrates a higher catalytic activity in the photocatalytic water decomposition for hydrogen production experiments under simulated sunlight irradiation, and its hydrogen production rate is approximately 10.8 times that of pure TiO2. The charge separation efficiency is enhanced because the S-scheme heterojunction is constructed between AgI and TiO2, and the homojunction is formed between the anatase and rutile phases of TiO2, which further improving the photocatalytic performance.
期刊介绍:
The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems.
Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal:
Low-dimensional systems
Exotic states of quantum electron matter including topological phases
Energy conversion and storage
Interfaces, nanoparticles and catalysts.