原位生长WO3/Bi2WO6构筑界面内建电场增强光电极电荷分离与传输的研究

doi:10.11896/cldb.24120134

材料导报

2025, Vol. 39

Issue (19): 24120134-8 https://doi.org/10.11896/cldb.24120134

无机非金属及其复合材料

原位生长WO₃/Bi₂WO₆构筑界面内建电场增强光电极电荷分离与传输的研究

张颁潮¹, 程厚燕^2,3,*

1 郑州轻工业大学艺术设计学院,郑州 450002
2 中国农业机械化科学研究院集团有限公司,北京 100083
3 北京金轮坤天特种机械有限公司,北京 100083

Study on Constructing the Interface Built-in Electric Fields Through In-situ Growth of WO₃/Bi₂WO₆ to Enhance the Charge Separation and Transfer of Photoelectrodes

ZHANG Banchao¹, CHENG Houyan^2,3,*

1 School of Art & Design, Zhengzhou University of Light Industry, Zhengzhou 450002, China
2 Chinese Academy of Agricultural Mechanization Science Group Co., Ltd., Beijing 100083, China
3 Beijing Jinlunkuntian Special Machine Co., Ltd., Beijing 100083, China

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摘要光电催化是实现太阳能转化成可再生能源的重要储能技术,材料的光吸收效率、电荷分离传输效率以及表面反应效率等因素直接影响着光电催化反应的整体效率,其中又以电荷分离传输效率最为关键。WO₃具有化学稳定性高、空穴扩散距离长及禁带宽度适中等优点,被广泛应用于光电催化反应。但受限于电荷分离传输效率低导致的光电催化效率低下问题,WO₃基光电催化材料在光电催化的应用中仍然面临较大挑战。针对该问题,本工作通过原位生长法将Bi₂WO₆包覆于WO₃表面形成异质结,从而构筑界面内建电场,有效提升光生电荷的分离传输驱动力。经材料结构和光电化学性能表征,结果表明,原位生长制备的WO₃/Bi₂WO₆复合光阳极膜具有Ⅱ型异质结结构,其表面光电压达8.7 μV,分别是WO₃和Bi₂WO₆的2.42和1.81倍;光电流密度达3.28 mA·cm^-2@1.23 V vs.RHE,较WO₃和Bi₂WO₆分别提升91%和143%。

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关键词: 氧化钨钨酸铋内建电场电荷分离传输异质结

Abstract: Photoelectrocatalysis is considered a crucial energy storage technology for converting solar energy into renewable energy sources. The photoelectrochemical reaction efficiency is controlled by light harvesting, charge separation and transfer (CST), and surface reaction efficiency, with CST being particularly critical. WO₃-based photocatalytic materials have garnered widespread attention due to high chemical stability, long hole diffusion distance, and moderate bandgap. However, the low efficiency of CST in WO₃-based photocatalytic materials remains a challenge, hampering their practical applications. To address this issue, this work uses a method of in-situ growth to coat Bi₂WO₆ on the surface of WO₃ to form a heterojunction and construct built-in electric fields at the interface to effectively improve the driving force of photogenerated charge separation and transmission. The results showed that the WO₃/Bi₂WO₆ composite photoanode film has a type Ⅱ heterojunction structure, and its surface photovoltage reaches 8.7 μV, which is 142% and 81% higher than those of WO₃ and Bi₂WO₆, respectively. The photocurrent density is 3.28 mA·cm^-2 @1.23 V vs. RHE, which is 91% and 143% higher than those of WO₃ and Bi₂WO₆, respectively.

Key words: tungsten oxide bismuth tungstate built-in electric field charge separation and transfer heterojunction

出版日期: 2025-10-10 发布日期: 2025-09-24

ZTFLH:

TB34

通讯作者: *程厚燕,材料科学与工程专业,工学博士,中国农业机械化科学研究院集团有限公司、北京金轮坤天特种机械有限公司工程师。主要从事光(电)催化材料、储能材料、热障陶瓷材料等方面的研究。chyzxhy123@163.com

作者简介: 张颁潮,材料科学与工程专业,工学硕士,郑州轻工业大学实验师,研究领域为氧化物陶瓷材料方向。

引用本文:

张颁潮, 程厚燕. 原位生长WO₃/Bi₂WO₆构筑界面内建电场增强光电极电荷分离与传输的研究[J]. 材料导报, 2025, 39(19): 24120134-8.
ZHANG Banchao, CHENG Houyan. Study on Constructing the Interface Built-in Electric Fields Through In-situ Growth of WO₃/Bi₂WO₆ to Enhance the Charge Separation and Transfer of Photoelectrodes. Materials Reports, 2025, 39(19): 24120134-8.

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https://www.mater-rep.com/CN/10.11896/cldb.24120134 或 https://www.mater-rep.com/CN/Y2025/V39/I19/24120134

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