التفاصيل البيبلوغرافية
| العنوان: |
Synthesis of Sulfur Vacancy-Bearing In 2 S 3 /CuInS 2 Microflower Heterojunctions via a Template-Assisted Strategy and Cation-Exchange Reaction for Photocatalytic CO 2 Reduction. |
| المؤلفون: |
Liao, Aizhen, Liu, Zhengchu, Wei, Yiqing, Xie, Qinghua, Kong, Ting, Zeng, Maolin, Wang, Wenpeng, Yang, Chao, Zhang, Linji, Xu, Yonggang, Zhou, Yong, Zou, Zhigang |
| المصدر: |
Molecules; Jul2024, Vol. 29 Issue 14, p3334, 11p |
| مصطلحات موضوعية: |
SEMICONDUCTOR materials, SEMICONDUCTOR design, PHOTOREDUCTION, ELECTRON transport, PHOTOCATALYSTS, HETEROJUNCTIONS |
| مستخلص: |
The synthesis of the accurate composition and morphological/structural design of multielement semiconductor materials is considered an effective strategy for obtaining high-performance hybrid photocatalysts. Herein, sulfur vacancy (Vs)-bearing In2S3/CuInS2 microflower heterojunctions (denoted Vs-In2S3/CuInS2) were formed in situ using In2S3 microsphere template-directed synthesis and a metal ion exchange-mediated growth strategy. Photocatalysts with flower-like microspheres can be obtained using hydrothermally synthesized In2S3 microspheres as a template, followed by Ostwald ripening growth during the metal cation exchange of Cu+ and In3+. The optimal heterostructured Vs-In2S3/CuInS2 microflowers exhibited CO and CH4 evolution rates of 80.3 and 11.8 μmol g−1 h−1, respectively, under visible-light irradiation; these values are approximately 4 and 6.8 times higher than those reported for pristine In2S3, respectively. The enhanced photocatalytic performance of the Vs-In2S3/CuInS2 catalysts could be attributed to the synergistic effects of the following factors: (i) the constructed heterojunctions accelerate charge-carrier separation; (ii) the flower-like microspheres exhibit highly uniform morphologies and compositions, which enhance electron transport and light harvesting; and (iii) the vs. may trap excited electrons and, thus, inhibit charge-carrier recombination. This study not only confirms the feasibility of the design of heterostructures on demand, but also presents a simple and efficient strategy to engineer metal sulfide photocatalysts with enhanced photocatalytic performance. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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