In present study, novel visible-light-driven photocatalyst AgI/SnS2 heterojunctions were prepared withhydrothermal-precipitation method. The resulting AgI/SnS2 heterojunctions exhibited superior andstable visible photocatalytic activity on Rhodamine B (RhB) removal. The optimal heterojunction with4:1 mass ratio of AgI: SnS2 exhibited the highest rate constant of 0.064 min-1for removal of RhB,which was about 2.1 and 3.4 times as much as pure AgI and SnS2, respectively. In addition, the studyby photoluminescence spectroscopy (PL) indicated that the improvement of the photocatalyticefficiency could be mainly owing to the truth that the photogenerated carriers were separated andtransferred effectively, resulted from the appropriate band gap match of AgI and SnS2. In addition, itwas found that ?O2?radicals and h+ were the main oxidative species responsible for removal of RhB.These features demonstrate that AgI/SnS2 heterojunction has great application potentials for pollutantsremoval from wastewater..
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