Interfacial chemical bonds and sulfur vacancies synergistically modulated charge transfer in ZnIn2S4/MoO2-C Ohmic-junction photocatalyst for efficient hydrogen evolution

Wu，Mingkun1; Chu，Bingxian2; Chen，Fang1; Xu，Yuzhi1; Zhang，Jianjun1; Tian，Mengkui1; Wang，Keliang3

2025-03-01

10.1016/j.seppur.2024.129583

Separation and Purification Technology   影响因子和分区

1383-5866

1873-3794

The construction of an Ohmic contact with a strong built-in electric field is crucial for the photocatalytic hydrogen evolution performance. However, consciously modulating Ohmic contacts to facilitate charge transfer remains very difficult. Herein, a sulfur vacancies-rich ZnInS/MoO-C Ohmic contact structure was synthesized by solvothermal method. Experimental results and DFT calculations indicated that the structure of MoO-C changes under high temperature and pressure conditions, leading to the formation of interfacial Mo-S bonds with sulfur-vacancy-rich ZnInS in close contact. Importantly, the electronic structure of the Ohmic junction was synergistically modulated by interfacial chemical bonds and sulfur vacancies, creating a strong built-in electric field that effectively facilitated charge transfer and exciton dissociation at the interface. The optimized ZnInS/MoO-C composite exhibited a photocatalytic hydrogen evolution rate of 59.9 µmol h, which was 12 times and 4.7 times higher than that of ZnInS without sulfur vacancies and with sulfur vacancies, respectively. This work presented a novel method of synergistically modulating charge transfer in Ohmic junctions, promising improved photocatalytic performance.

Mo-S bonds Ohmic junction Photocatalytic hydrogen evolution Sulfur vacancies ZnIn2S4/MoO2-C

英语

其他

2-s2.0-85203806684

Scopus

1.School of Chemistry and Chemical Engineering,Guizhou University,Guiyang,550025,China
2.Department of Chemistry,Southern University of Science and Technology,Shenzhen,518055,China
3.School of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui,553004,China

Wu，Mingkun,Chu，Bingxian,Chen，Fang,et al. Interfacial chemical bonds and sulfur vacancies synergistically modulated charge transfer in ZnIn2S4/MoO2-C Ohmic-junction photocatalyst for efficient hydrogen evolution[J]. Separation and Purification Technology,2025,355.

Wu，Mingkun.,Chu，Bingxian.,Chen，Fang.,Xu，Yuzhi.,Zhang，Jianjun.,...&Wang，Keliang.(2025).Interfacial chemical bonds and sulfur vacancies synergistically modulated charge transfer in ZnIn2S4/MoO2-C Ohmic-junction photocatalyst for efficient hydrogen evolution.Separation and Purification Technology,355.

Wu，Mingkun,et al."Interfacial chemical bonds and sulfur vacancies synergistically modulated charge transfer in ZnIn2S4/MoO2-C Ohmic-junction photocatalyst for efficient hydrogen evolution".Separation and Purification Technology 355(2025).