Graphdiyne (CnH2 n-2)-Based GDY/CuI/MIL-53(Al) S-Scheme Heterojunction for Efficient Hydrogen Evolution

Zhiliang Jin; Xiaohong Li; Teng Li; Youji Li

doi:10.1021/acs.langmuir.2c02334

Graphdiyne (C_nH_{2 n-2})-Based GDY/CuI/MIL-53(Al) S-Scheme Heterojunction for Efficient Hydrogen Evolution

Langmuir. 2022 Dec 20;38(50):15632-15641. doi: 10.1021/acs.langmuir.2c02334. Epub 2022 Dec 12.

Authors

Zhiliang Jin¹, Xiaohong Li¹, Teng Li¹, Youji Li²

Affiliations

¹ School of Chemistry and Chemical Engineering, Ningxia Key Laboratory of Solar Chemical Conversion Technology, Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan750021, People's Republic of China.
² College of Chemistry and Chemical Engineering, Jishou University, Jishou, Hunan416000, People's Republic of China.

PMID: 36507799
DOI: 10.1021/acs.langmuir.2c02334

Abstract

Graphdiyne (g-C_nH_2n-2) is a new carbon material composed of sp and sp² hybrid carbon atoms. Since the synthesis by Li's team, graphdiyne has been widely studied in other fields because of its excellent properties. In this paper, graphdiyne was synthesized from copper-containing materials and the composite GDY/CuI/MIL-53(Al) S-scheme heterojunction is prepared for photocatalytic cracking of water to produce hydrogen. First, GDY/CuI was prepared by organic synthesis, and then GDY/CuI was anchored on the surface of MIL-53(Al) by in situ ultrasonic stirring. After the continuous optimization of experimental conditions, the final hydrogen evolution rate is much higher than that of MIL-53(Al). This efficient photocatalytic performance can be attributed to the S-scheme heterojunction formed by the unique energy band arrangement. At the same time, the mechanism of charge transfer was demonstrated by in situ irradiation X-ray photoelectron spectroscopy. The strong interaction among the three strongly promotes the separation and transfer of photogenerated electron-hole pairs.