Fabrication of CdS/Ti3C2/g-C3N4NS Z-scheme composites with enhanced visible light-driven photocatalytic activity.

Ranran Zhang,Jiaying Jin,Rufen Chen,Lumeng Jia,Bo Shi

doi:10.1007/s11356-021-16942-4

Abstract

The Ti3C2 and g-C3N4NS were obtained first, and the CdS/Ti3C2/g-C3N4NS Z-scheme composites were prepared via a facile hydrothermal synthesis, and their photocatalytic properties were investigated. The g-C3N4NS with a high surface area displayed higher adsorption and degradation capacity. Compared with Ti3C2/g-C3N4NS and CdS, the visible light photocatalytic activity of CdS/Ti3C2/g-C3N4NS composites was improved. The as-synthesized CTN-4:1 composite exhibited outstanding photocatalytic performance for degradation of orange II, approximately 3.2 and 10.7 times higher than that of Ti3C2/g-C3N4NS and CdS, respectively. The fabrication of CdS/Ti3C2/g-C3N4NS Z-scheme heterostructure using Ti3C2 as electron transfer medium improved the separation ability of the photoinduced e--h+ pairs, thereby leading to the improvement of visible light-driven photocatalytic activity. This finding provides new insights into the construction of high efficiency Z-scheme heterostructure photocatalyst.

Highlights

With the development of industry, water pollution has become a serious problem
The Ti3C2 and g-C3N4NS were obtained first, and the CdS/Ti3C2/g-C3N4NS Z-scheme composites were prepared via a facile hydrothermal synthesis and their photocatalytic properties were investigated
Some studies found that the preparation of ternary Z-scheme heterostructure composites using Ti3C2 as electron transfer medium can improve the photocatalytic degradation of pollutants (Ai et al 2019; Li et al 2019; Ding et al 2019 Sun et al 2020)

Summary

Introduction

With the development of industry, water pollution has become a serious problem. Photocatalysis has attracted much attention in resolving water pollution (Xu et al 2019; Sun et al 2020). The Ti3C2 and g-C3N4NS were obtained first, and the CdS/Ti3C2/g-C3N4NS Z-scheme composites were prepared via a facile hydrothermal synthesis and their photocatalytic properties were investigated. Compared with Ti3C2/g-C3N4NS and CdS, the optimal ternary composites exhibited significantly enhanced visible light (vis) photocatalytic activity.

Results

Conclusion