Ingenious preparation of layered-closed TiO2-BiVO4-CdS film and its highly stable and sensitive photoelectrochemical cathodic protection performance

Constructing a photo-anode owning both protection performance and high stability remains urgent for photoelectrochemical cathodic protection technology. In this work, we develop a layered-closed heterojunction (m-TiO2-f-BiVO4-c-CdS) with a well-matched energy band. The closed structure benefits to avoid the loss of active materials, and the layered structure with a well-matched energy band promotes the orderly separation of electrons and holes, thereby achieving a highly stable and sensitive photoelectmchemical protection performance in 3.5 wt% NaCl without hole scavenging agent (performance retention rates after 100 cycles and 3.3 h are as high as 86% and 80%, respectively).

Automated summary

This study successfully developed a layered-closed heterojunction photo-anode, exhibiting highly stable and sensitive photoelectrochemical protection performance in 3.5 wt% NaCl without the need for hole scavenging agents.