Ag Decoration and SnO(2) Coupling Modified Anatase/Rutile Mixed Crystal TiO(2) Composite Photocatalyst for Enhancement of Photocatalytic Degradation towards Tetracycline Hydrochloride

The anatase/rutile mixed crystal TiO(2) was prepared and modified with Ag decoration and SnO(2) coupling to construct a Ag@SnO(2)/anatase/rutile composite photocatalytic material. The crystal structure, morphology, element valence, optical properties and surface area were characterized, and the effects of Ag decoration and SnO(2) coupling on the structure and photocatalytic properties of TiO(2) were studied. Ag decoration and SnO(2) coupling are beneficial to reduce the recombination of photogenerated electrons and holes. When the two modification are combined, a synergistic effect is produced in suppressing the photogenerated charge recombination, making Ag@SnO(2)/TiO(2) exhibits the highest quantum utilization. After 30 min of illumination, the degradation degree of tetracycline hydrochloride (TC) by pure TiO(2) increased from 63.3% to 83.1% with Ag@SnO(2)/TiO(2).