应用化学 ›› 2022, Vol. 39 ›› Issue (4): 694-696.DOI: 10.19894/j.issn.1000-0518.210464

• 研究简报 • 上一篇    

电喷雾沉积WO3/Fe2TiO5复合光阳极及其光电催化水裂解性能

吴小峰, 陈德顺, 马伟, 黄科科()   

  1. 吉林大学无机合成与制备化学国家重点实验室,长春 130012
  • 收稿日期:2021-09-13 接受日期:2021-11-16 出版日期:2022-04-01 发布日期:2022-04-19
  • 通讯作者: 黄科科
  • 基金资助:
    国家自然科学基金(21801090);吉林省教育厅项目(JJKH20211044KJ);吉林大学实验技术项目(409020720202)

WO3/Fe2TiO5 Composite Photoanode Deposited via Electrospray for Enhanced Photoelectrochemical Water Splitting

Xiao-Feng WU, De-Shun CHEN, Wei MA, Ke-Ke HUANG()   

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,China
  • Received:2021-09-13 Accepted:2021-11-16 Published:2022-04-01 Online:2022-04-19
  • Contact: Ke-Ke HUANG
  • About author:kkhuang@jlu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21801090);the Education Department of Jilin Province(JJKH20211044KJ);the Project on Experimental Technique of Jilin University(409020720202)

摘要:

构建异质结是改善半导体光响应和载流子传输的有效途径之一。采取电喷雾沉积法,在掺氟的二氧化锡玻璃(FTO)上先后制备了WO3和Fe2TiO5纳米结构薄膜,并研究了其作为光阳极的光电催化性能。薄膜表面复杂的微纳米结构有效地增加了对光的捕获能力和化学反应比表面积;二者在界面处形成的异质结有效地抑制了光生载流子的复合,加速了电荷的转移,提升了光电催化水裂解性能。在1.23 V和1.6 V(vs.RHE)处,其光电流密度相比纯Fe2TiO5电极分别提升了1.4和4.6倍。

关键词: 光电催化, 异质结, 电喷雾, 水裂解, 光阳极

Abstract:

Heterojunction construction is one of efficient routes for improving light response and carrier transport of semiconductor. Here, nanostructured WO3 and Fe2TiO5 films were sequentially deposited on the fluorine-doped SnO2 (FTO) coated glass substrate by two electrospray steps, and the performance of as-prepared photoanode was studied in detail. Benefited from the complex surface structure in nano-micro scale, the trapping ability of photons and the active area for water oxidation reaction are enhanced effectively. More importantly, the photo-generated charge carrier recombination is restrained by the heterojunction formed at the interface of WO3 and Fe2TiO5 and the charge transfer is accelerated due to the presence of built-in potential, which promotes the photoelectrochemical water splitting performance. The photocurrent density of WO3/Fe2TiO5 photoanode is 1.4 and 4.6 fold larger than those of pristine Fe2TiO5 at 1.23 V (vs.RHE) and 1.6 V (vs.RHE), respectively.

Key words: Photoelectrochemical, Heterojunction, Electrospray, Water Splitting, Photoanode

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