{"title":"Oxygen vacancy-enriched CoPi/TiO2 nanotubes/WO3 electrode for enhanced photoelectrochemical water oxidation","authors":"Shujun Yu, Ke Sun, Guangyu Fang, Jiangwang Feng, Qiaonan Yu, Junling Chen, Pengcheng Wu, Keliang Wu","doi":"10.1007/s10854-024-13808-6","DOIUrl":null,"url":null,"abstract":"<div><p>TiO<sub>2</sub> has been widely used in photocatalytic water splitting, but its wide band gap and easy recombination carrier limit its further application. In this work, highly ordered TiO<sub>2</sub> nanotube arrays (TiO<sub>2</sub> NBs) were prepared by anodic oxidation, and more oxygen vacancies were provided by local amorphous. The increase of oxygen vacancy improves the carrier separation efficiency, and the array structure achieves faster electron transport. In addition, WO<sub>3</sub> semiconductor was coupled with TiO<sub>2</sub> to construct heterojunction, expand the range of light absorption, and enhance the electron–hole pair separation efficiency. In addition, by introducing co-catalyst CoPi, the active site of the reaction was increased, and the catalytic reaction efficiency was improved kinetically. The results show that the photocurrent of CoPi/WO<sub>3</sub>/TiO<sub>2</sub> NBs is 10.2 <i>μ</i>A/cm<sup>2</sup>, which is 1.68 times that of TiO<sub>2</sub> NBs.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science: Materials in Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10854-024-13808-6","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
TiO2 has been widely used in photocatalytic water splitting, but its wide band gap and easy recombination carrier limit its further application. In this work, highly ordered TiO2 nanotube arrays (TiO2 NBs) were prepared by anodic oxidation, and more oxygen vacancies were provided by local amorphous. The increase of oxygen vacancy improves the carrier separation efficiency, and the array structure achieves faster electron transport. In addition, WO3 semiconductor was coupled with TiO2 to construct heterojunction, expand the range of light absorption, and enhance the electron–hole pair separation efficiency. In addition, by introducing co-catalyst CoPi, the active site of the reaction was increased, and the catalytic reaction efficiency was improved kinetically. The results show that the photocurrent of CoPi/WO3/TiO2 NBs is 10.2 μA/cm2, which is 1.68 times that of TiO2 NBs.
期刊介绍：
The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.
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