The dual Z-scheme photocatalysts of beta-In2S3/g - C3N4/WO3 (ISCNWO) were synthesized with improved light adsorption, carrier separation and specific surface area for tetracycline (TC) degradation by sunlight irradiation. The ISCNWO2 exhibited superior solar photodegradation performance of TC, and the kinetic constant was 2.2, 5.6 and 2.3 times that of g-C3N4, WO3 and In2S3, respectively. According to response surface methodology, the optimum TC removal was 96.4 +/- 0.37 % at pH = 3.4 for 140 min irradiation without electrolyte. Even in river, municipal, hospital, frog farming field and tail w...
