Citation: Jinhui Jiang, Jiaqi Sun, Yongyi Chen, Lei Zhang, Pengyu Dong. W₁₈O₄₉/Al-doped SrTiO₃ S-scheme heterojunction aided by the LSPR effect for full-spectrum solar light-driven photocatalytic hydrogen evolution[J]. Acta Physico-Chimica Sinica, ;2025, 41(11): 100145. doi: 10.1016/j.actphy.2025.100145 shu

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

Jinhui Jiang ^{1, †} ,
Jiaqi Sun ^{1, †} ,
Yongyi Chen ^{1, 2} ,
Lei Zhang ^{1, 2} ,
Pengyu Dong ^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

Corresponding author: Pengyu Dong, dongpy11@gmail.com

^†

Received Date: 20 June 2025
Revised Date: 30 July 2025
Accepted Date: 31 July 2025

Fund Project: the National Natural Science Foundation of China 21403184the Natural Science Foundation of the Jiangsu Higher Education Institutions of China 22KJA430008

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

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