当前位置: X-MOL 学术J. Semicond. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Tunable crystal structure of Cu–Zn–Sn–S nanocrystals for improving photocatalytic hydrogen evolution enabled by copper element regulation
Journal of Semiconductors Pub Date : 2022-03-01 , DOI: 10.1088/1674-4926/43/3/032701
Zhe Yin 1 , Min Hu 1 , Jun Liu 2, 3 , Hao Fu 1 , Zhijie Wang 2, 3, 4 , Aiwei Tang 1
Affiliation  

Hydrogen energy is a powerful and efficient energy resource, which can be produced by photocatalytic water splitting. Among the photocatalysis, multinary copper-based chalcogenide semiconductor nanocrystals exhibit great potential due to their tunable crystal structures, adjustable optical band gap, eco-friendly, and abundant resources. In this paper, Cu–Zn–Sn–S (CZTS) nanocrystals with different Cu content have been synthesized by using the one-pot method. By regulating the surface ligands, the reaction temperature, and the Cu content, kesterite and hexagonal wurtzite CZTS nanocrystals were obtained. The critical factors for the controllable transition between two phases were discussed. Subsequently, a series of quaternary CZTS nanocrystals with different Cu content were used for photocatalytic hydrogen evolution. And their band gap, energy level structure, and charge transfer ability were compared comprehensively. As a result, the pure hexagonal wurtzite CZTS nanocrystals have exhibited an improved photocatalytic hydrogen evolution activity.

中文翻译:

可调谐晶体结构的 Cu-Zn-Sn-S 纳米晶体,用于改善铜元素调控带来的光催化析氢

氢能是一种强大而高效的能源,可以通过光催化分解水来生产。在光催化领域,多元铜基硫族化物半导体纳米晶以其晶体结构可调、光学带隙可调、环境友好、资源丰富等优点展现出巨大的潜力。在本文中,采用一锅法合成了具有不同 Cu 含量的 Cu-Zn-Sn-S (CZTS) 纳米晶。通过调节表面配体、反应温度和 Cu 含量,获得锌黄铜矿和六方纤锌矿 CZTS 纳米晶。讨论了两相之间可控过渡的关键因素。随后,一系列具有不同 Cu 含量的四元 CZTS 纳米晶被用于光催化析氢。他们的带隙,综合比较了能级结构和电荷转移能力。因此,纯六方纤锌矿 CZTS 纳米晶体表现出改进的光催化析氢活性。
更新日期:2022-03-01
down
wechat
bug