title: Visible-light-induced WO3/g-C3N4 composites with enhanced photocatalytic activity.
abstract: Novel WO3/g-C3N4 composite photocatalysts were prepared by a calcination process with different mass contents of WO3. The photocatalysts were characterized by thermogravimetric analysis (TG), powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS), high-resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflection spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) and electrochemical impedance spectroscopy (EIS). The photocatalytic activity of the photocatalysts was evaluated by degradation of methylene blue (MB) dye and 4-chlorophenol (4-CP) under visible light. The results indicated that the WO3/g-C3N4 composite photocatalysts showed higher photocatalytic activity than both the pure WO3 and pure g-C3N4. The optimum photocatalytic activity of WO3/g-C3N4 at a WO3 mass content of 9.7% under visible light irradiation was up to 4.2 times and 2.9 times as high as that of the pure WO3 and pure g-C3N4, respectively. The remarkably increased performance of WO3/g-C3N4 was mainly attributed to the synergistic effect between the interface of WO3 and g-C3N4, including enhanced optical absorption in the visible region, enlarged specific surface areas and the suitable band positions of WO3/g-C3N4 composites.
authors: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
authors: Liying
authors: L
authors: Huang
authors: Hui
authors: H
authors: Xu
authors: Yeping
authors: Y
authors: Li
authors: Huaming
authors: H
authors: Li
authors: Xiaonong
authors: X
authors: Cheng
authors: Jixiang
authors: J
authors: Xia
authors: Yuanguo
authors: Y
authors: Xu
authors: Guobin
authors: G
authors: Cai