Author(s)

Wenjing Zhao,Yuqiong Wang, Junfang Wang, Zixuan Wang, Zhongsen Sun and Zhenquan Li

Corresponding Author

Zhenquan Li

Abstract

In order to improve the photo electrochemical (PEC) performance, good light absorption capacity and efficient charge transport capacity are essential. In this paper, in order to increase the responsiveness of TiO2 in the visible-light region, we designed a core-shell heterostructure, we coated Co3O4 on the surface of TiO2 nanowire array (NWAs) that can effectively absorb visible light. The photocurrent density of the TiO2/Co3O4 NWAs reached to 0.94 mA/cm2, which is 27.1% higher than that of pure TiO2 nanowire array. The carrier concentration of the TiO2/Co3O4 NWAs is 3.8×1019 cm-3, which is increased by 324% compared to the pure TiO2 nanowire array. The result shows that the TiO2/Co3O4 core-shell nanowire array can improve the carrier concentration and carrier transport and separation ability, thereby improving its photo electrochemical performance.

Keywords

Water splitting photo electrochemical; Core-shell; TiO2/Co3O4 heterostructure