物理化学学报 >> 2025, Vol. 41 >> Issue (11): 100145.doi: 10.1016/j.actphy.2025.100145

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W18O49/铝掺杂SrTiO3 S型异质结在LSPR效应辅助下实现全光谱太阳光驱动的光催化产氢

蒋金辉1,†, 孙佳琦1,†, 陈咏一1,2, 张磊1,2, 董鹏玉1,*()   

  1. 1 盐城工学院, 江苏省新型环保重点实验室, 江苏 盐城 224051
    2 盐城工学院材料科学与工程学院, 江苏省生态环境材料重点实验室, 江苏 盐城 224051
  • 收稿日期:2025-06-20 修回日期:2025-07-30 录用日期:2025-07-31 发布日期:2025-09-29
  • 通讯作者: Email: dongpy11@gmail.com (董鹏玉)
  • 作者简介:

    †These two authors contributed equally to this work (J.J. and J.S.).

  • 基金资助:
    国家自然科学基金(21403184); 中国江苏省高校自然科学研究基金(22KJA430008)

W18O49/Al-doped SrTiO3 S-scheme heterojunction aided by the LSPR effect for full-spectrum solar light-driven photocatalytic hydrogen evolution

Jinhui Jiang1, Jiaqi Sun1, Yongyi Chen1,2, Lei Zhang1,2, Pengyu Dong1,*()   

  1. 1 Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, Jiangsu Province, China
    2 Key Laboratory for Ecological-Environment Materials of Jiangsu Province, School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu Province, China
  • Received:2025-06-20 Revised:2025-07-30 Accepted:2025-07-31 Published:2025-09-29
  • Contact: Email: dongpy11@gmail.com (Pengyu Dong)
  • Supported by:
    the National Natural Science Foundation of China(21403184); the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(22KJA430008)

摘要:

开发具有全光谱响应的高效光催化剂用于制氢具有重要意义。为了实现全光谱太阳光驱动的光催化,W18O49由于局域表面等离子体共振(LSPR)效应,在捕获可见光和近红外(NIR)光方面表现良好。然而,W18O49的光催化产氢活性非常低,需要进行改性。在本研究中,采用简单的原位溶剂热合成方法制备了Al掺杂的SrTiO3 (ASTO)/W18O49 S型异质结。得益于更强的载流子分离、更快的电子传输和强大的氧化还原能力,10% ASTO/W18O49 S型异质结表现出最高的全光谱太阳光驱动光催化产氢速率,分别是纯ASTO和W18O49的17.5倍和27.6倍。W18O49中丰富的氧空位产生的LSPR效应将光吸收范围扩展到NIR区域,显著提高了其对全光谱太阳光的利用效率。此外,由于W18O49的LSPR效应,它可以产生等离子体高能“热电子”,并使其转移到ASTO/W18O49异质结中ASTO的导带(CB),从而促进光生载流子的分离和迁移,并大大增加ASTO的CB上参与光催化产氢反应的光生电子和“热电子”的数量,与单一组分的W18O49和ASTO相比,表现出优异的光催化产氢性能。

关键词: S型异质结, 光催化产氢, 局域表面等离子体共振效应, W18O49, 铝掺杂SrTiO3

Abstract:

Developing highly efficient photocatalysts with a full-spectrum response for hydrogen production is of great significance. To achieve full-spectrum solar-light-driven photocatalysis, W18O49 works well for capturing visible and near-infrared (NIR) light due to the localized surface plasmon resonances (LSPR) effect. Nevertheless, W18O49 has very little photocatalytic hydrogen generation activity, which needs to be modified. In this work, a simple in situ solvothermal synthesis method was conducted to prepare Al-doped SrTiO3 (ASTO)/W18O49 S-scheme heterojunction. Benefiting from more powerful carrier separation, faster electron transport, and strong redox capacity, the 10% ASTO/W18O49 S-scheme heterojunction exhibits the highest full-spectrum solar-light-driven photocatalytic hydrogen rate, which is 17.5 and 27.6 times that of pure ASTO and W18O49, respectively. The LSPR effect derived from W18O49 with abundant oxygen vacancies extends the range of light absorption to the NIR region, which significantly improves its utilization efficiency of full-spectrum sunlight. Moreover, due to the LSPR effect of W18O49, it could produce plasmonic high-energy "hot electrons" and allow them to transfer to the conduction band (CB) of ASTO in the ASTO/W18O49 heterojunction, which could promote the separation and migration of photoinduced carriers and greatly increase the number of electrons containing photogenerated electrons and "hot electrons" on the CB of ASTO that can participate in photocatalytic hydrogen production reaction, exhibiting excellent photocatalytic hydrogen evolution performance compared to single-component W18O49 and ASTO.

Key words: S-scheme heterojunction, Photocatalytic hydrogen evolution, LSPR effect, W18O49, Al-doped SrTiO3