Constructing low-cost Ni3C/twin-crystal Zn0.5Cd0.5S heterojunction/homojunction nanohybrids for efficient photocatalytic H2 evolution

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
View graph of relations

Author(s)

  • Rongchen Shen
  • Yingna Ding
  • Shibang Li
  • Peng Zhang
  • Quanjun Xiang
  • Xin Li

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)25-36
Journal / PublicationChinese Journal of Catalysis
Volume42
Issue number1
Online published30 May 2020
Publication statusPublished - 5 Jan 2021

Abstract

The development of low-cost semiconductor photocatalysts for highly efficient and durable photocatalytic H2 evolution under visible light is very challenging. In this study, we combine low-cost metallic Ni3C cocatalysts with twin nanocrystal Zn0.5Cd0.5S (ZCS) solid solution homojunctions for an efficient visible-light-driven H2 production by a simple approach. As-synthesized Zn0.5Cd0.5S-1% Ni3C (ZCS-1) heterojunction/homojunction nanohybrid exhibited the highest photocatalytic H2-evolution rate of 783 μmol h-1 under visible light, which is 2.88 times higher than that of pristine twin nanocrystal ZCS solid solution. The apparent quantum efficiencies of ZCS and ZCS-1 are measured to be 6.13% and 19.25% at 420 nm, respectively. Specifically, the homojunctions between the zinc blende and wurtzite segments in twin nanocrystal ZCS solid solution can significantly improve the light absorption and separation of photogenerated electron-hole pairs. Furthermore, the heterojunction between ZCS and metallic Ni3C NP cocatalysts can efficiently trap excited electrons from ZCS solid solution and enhance the H2-evolution kinetics at the surface for improving catalytic activity. This study demonstrates a unique one-step strategy for constructing heterojunction/homojunction hybrid nanostructures for a more efficient photocatalytic H2 evolution compared to other noble metal photocatalytic systems.

Research Area(s)

  • Earth-abundant Ni3C cocatalysts, Heterojunction/homojunction, Photocatalytic H2 evolution, Twin nanocrystal, Zn0.5Cd0.5S solid solution

Citation Format(s)

Constructing low-cost Ni3C/twin-crystal Zn0.5Cd0.5S heterojunction/homojunction nanohybrids for efficient photocatalytic H2 evolution. / Shen, Rongchen; Ding, Yingna; Li, Shibang; Zhang, Peng; Xiang, Quanjun; Ng, Yun Hau; Li, Xin.

In: Chinese Journal of Catalysis, Vol. 42, No. 1, 05.01.2021, p. 25-36.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review