Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts

被引：172

作者：

Liu, Shizhen ^{[1
]}

Sun, Hongqi ^{[1
]}

Liu, Shaomin ^{[1
]}

Wang, Shaobin ^{[1
]}

机构：

[1] Curtin Univ Technol, Dept Chem Engn, Perth, WA 6845, Australia

来源：

CHEMICAL ENGINEERING JOURNAL | 2013年 / 214卷

关键词：

Graphene; TiO2; Methylene blue; Photocatalysis; Visible light; TIO2; NANOPARTICLES; WATER-TREATMENT; COMPOSITES; NANOCOMPOSITES; METHACRYLATE); ENHANCEMENT; DEGRADATION; PERFORMANCE; REDUCTION; OXIDE;

D O I：

10.1016/j.cej.2012.10.058

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Several graphene-titania composites (G-TiO2) were synthesized by a sal-gel method using titanium isopropoxide (or P25) as Ti-precursors and reduced graphene oxide (RGO). The structural, morphological, and physicochemical properties of the samples were thoroughly investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), UV-vis diffuse reflectance (UV-vis DRS), and thermogravimetric-differential thermal analysis (TG-DTA). A significant increase in light absorption to visible light was observed by G-TiO2 compared with that of naked TiO2. The photocatalytic activity of G-TiO2 in methylene blue bleaching under visible light (>430 nm) is much enhanced. G-TiO2 synthesized from titanium isopropoxide hydrolysis presented higher activity than that of G-TiO2(P25). Contribution of graphene on the enhancement of visible-light photocatalytic activity of the composite was discussed. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：298 / 303

页数：6

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