S-defected In2S3/ZnS nanospheres for enhancing solar-light photocatalytic capacity

Abstract

S-defected In 2 S 3 /ZnS nanospheres were synthesized via a microwave-assisted hydrothermal route for facilitating the solar-light induced photodegradation of tetracycline hydrochloride (TCH). The removal efficiency of TCH over In 2 S 3 /ZnS was higher in comparison to pure ZnS and In 2 S 3 . The adsorption-photocatalytic capacity of S-defected In 2 S 3 /ZnS was affected by In 2 S 3 content, TCH concentration, inorganic salts, pH, and quenchers. The removal efficiency of optimal 3-In 2 S 3 /ZnS for TCH solution of 50 mg L −1 was 100% within 90 min, and decreased to 93.26% after five cycle times. The main active species were •O 2 - and h + in solar-light driven photocatalytic system. The enhanced photocatalytic performance of S-defected In 2 S 3 /ZnS was due to the tight interface between In 2 S 3 and ZnS for the efficient transfer and utilization of photo-induced carriers. • In 2 S 3 /ZnS nanospheres were prepared by a microwave-assisted hydrothermal route. • Tight interface of In 2 S 3 and ZnS favored the transfer and utilization of charge carriers. • S-defected In 2 S 3 /ZnS exhibited the excellent photocatalytic activity and durability.