Preparation of high-activity AgBr/Ag3PO4 photocatalyst based on hexadecyltrimethylammonium bromide and mechanism of photocatalytic enhancement

摘要

A high-activity AgBr/Ag3PO4 heterojunction photocatalyst was synthesized based on hexadecyltrimethylammonium bromide. Its microspheres were characterized using X-ray diffractometry, transmission electron microscopy and ultraviolet-visible diffuse reflectance spectroscopy. The new photocatalyst with high photocatalytic activity exceptionally outperforms pure Ag3PO4 and AgBr in methyl orange degradation. The enhancement of photocatalytic activity is attributed to the efficient separation of electron-hole pairs. In this photocatalytic reaction, h(+) and O-center dot(2-) are the main reactive species that induce visible-light-driven degradation.