Composite photocatalyst and preparation method thereof

• Main Authors: HE RONGAN, HUANG SHAN, YUAN XIANGFENG, ZHAO PEIMING, LI YANHUA, SUN JINYA, LING XUYAN
• Format: Patent
• Language: Chinese; English
• Published: 25.07.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to the technical field of photocatalysis, in particular to a composite photocatalyst and a preparation method thereof. According to the simple method for depositing the Bi2Se3 nanodots on the surface of the graphite phase carbon nitride (g-C3N4) through the in-situ conversion reaction, a Bi2O3/g-C3N4 precursor is prepared in advance in the reaction, then the Bi2O3 is converted into the Bi2Se3 nanodots through the in-situ selenylation reaction, and the Bi2Se3/g-C3N4 composite photocatalyst is obtained. In an experiment of photocatalytic degradation of phenol, the performance of the Bi2Se3/g-C3N4 composite photocatalyst is obviously superior to that of a Bi2O3/g-C3N4 precursor and that of single Bi2Se3 and g-C3N4. And meanwhile, the Bi2Se3 has good stability, and when photo-reduction is carried out in an N2 environment, the Bi2Se3 shows good light corrosion resistance. 本发明涉及光催化技术领域，尤其涉及一种复合光催化剂及其制备方法。本发明能在石墨相氮化碳(g-C3N4)表面通过原位转化反应沉积Bi2Se3纳米点的简易方法，反应通过预先制备Bi2O3/g-C3N4前驱体，再通过原位硒化反应，将Bi2O3转化为B