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] |
|
Copyright of Molecules is the property of MDPI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
قاعدة البيانات: |
Complementary Index |