Abstract
Currently, inner-generate hydrogen peroxide to enhance the degradation of pollutants is an outstanding way. However, few studies have been done on MoS2 photocatalysts with sulfur vacancies at the phase-junction to produce innergenerate-H2O2 to promote contaminants degradation. Herein, we prepared Mo_(1-x)S_(2-y) photo-catalysts with sulfur vacancies at the phase-junction by a simple method (temperature-programmed reduction in hydrogen atmosphere) to achieve high innergenerate-H2O2 and high degradation efficiency. Specifically, Mo_(1-x)S_(2-y) exhibited a high yield of innergenerate-H2O2 (35 nmol L~(-1) h~(-1),1.5 times as high as bulk MoS2) under simulated solar irradiation, because the promoted electron transfer can increase superoxide radical to generate innergenerate-H2O2. Hydroxyl radicals generated by decomposition of innergenerate-H2O2 through the transformation of variable metal molybdenum atom (Mo(IV)/Mo(VI)) can effectively improve the degradation efficiency of tetracycline and diclofenac sodium (twice as high as bulk M0S2). The novel and concise way was paved to synthesize photocatalysts for high-efficiency photocatalytic degradation by innergenerate-H2O2.
NSTL