Enhanced simulated sunlight-driven photocatalytic performance of SnWO_4 prepared in the presence of cetyltrimethylammonium bromide

摘要

In this paper, SnWO_4 photocatalyst with enhanced simulated sunlight-driven photo-catalytic performance was prepared by a hydrothermal method in the presence of cetyltrimethylammonium bromide (CTAB). The samples were characterized by Brunauer-Emmett-Teller method, X-ray diffraction, UV-vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, surface photovoltage spectroscopy, and scanning electron microscopy. The active free radicals formed were investigated by electron spin resonance spectroscopy and trapping experiments. Photocatalytic abilities of the photocatalyts were evaluated using methyl orange as model contaminant. The results show that CTAB induces redshift and promotes the photo-induced charge separation rate of SnWO_4, thereby boosting the photocatalytic performance. The photocatalytic test results reveal that the photocatalytic activity of CTAB-SnWO_4 is 7.25 times of the reference SnWO_4.