Synthesis of 1D/2D Bi2S3@Ti3C2 heterojunction with superior photocatalytic removal ability of tetracycline hydrochloride

• Small size Bi 2 S 3 nanorods with a diameter of less than 200 nm were dispersed on Ti 3 C 2 MXene. • Plenty of heterostructure interfaces between Bi 2 S 3 and Ti 3 C 2 effectively promoted electron delivery. • Bi 2 S 3 @Ti 3 C 2 photocatalyst exhibited the superior capacity for removing tetracycline hydrochloride. 1D/2D Bi 2 S 3 @Ti 3 C 2 heterojunction was synthesized by hydrothermal growth method. The obtained Bi 2 S 3 @Ti 3 C 2 heterojunction was employed as photocatalyst for rapidly photocatalytic removal of tetracycline hydrochloride (TCH). Under simulated sunlight irradiation, the Bi 2 S 3 @Ti 3 C 2 heterojunction with 15 wt% Ti 3 C 2 dosage showed the highest photocatalytic activity. And its photodegradation efficiency was 98 % in 50 min. The photodegradation efficiency of Bi 2 S 3 @Ti 3 C 2 could reach 87 % in 50 min after 4 cycles. The mechanism of the Bi 2 S 3 @Ti 3 C 2 heterojunction for TCH photodegradation was discussed by free radical capture experiment. The results showed that the main active species were •O 2 − and •OH during the photocatalytic removal of TCH. It proved that 1D/2D Bi 2 S 3 @Ti 3 C 2 heterojunction could be a useful way to promote the photocatalytic capacity of Bi 2 S 3 during antibiotic wastewater purification.