Construction of Z-type Bi12O15Cl6/Ag2CO3 photocatalyst for enhanced photocatalytic degradation of RhB and TC

In the face of water pollution, constructing a photocatalyst with high redox ability to remove organic pollutants is necessary. A novel Z-scheme Bi12O15Cl6/Ag2CO3 heterojunction was successfully designed. Under LED light, the best sample 8% Bi12O15Cl6/Ag2CO3 can remove 99.8% RhB and 79.8% TC within 90 min. The morphology, structure, electrochemical and optical performance of Bi12O15Cl6/Ag2CO3 were detected by a series of characterization. The charge separation and transition efficiency were verified by electrochemical impedance spectroscopy (EIS) and photocurrent. The photodegradation pathway, intermediate product and active substances were measured by mass spectrometry (MS). During photocatalytic reactions, <middle dot>OH, <middle dot>O-2(-) and h(+) are active substances, among which h(+) played an extremely important role. A Z-type photocatalytic reaction mechanism was produced based on the capture test. This study provides a new idea for the synthesis of Z-type hybrid structure for the degradation of organic pollutants.