Kinetics of Photocatalytic Degradation of Methylene Blue by TiO2-Graphene Nanocomposites

被引：14

作者：

Loryuenyong, Vorrada ^{[1
,2
]}

Charoensuk, Jaruwan ^{[1
]}

Charupongtawitch, Rachaya ^{[1
]}

Usakulwattana, Amika ^{[1
]}

Buasri, Achanai ^{[1
,2
]}

机构：

[1] Silpakorn Univ, Fac Engn & Ind Technol, Dept Mat Sci & Engn, Nakhon Pathom 73000, Thailand

[2] Chulalongkorn Univ, Natl Ctr Excellence Petr & Adv Mat, Bangkok 10330, Thailand

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2016年 / 16卷 / 01期

关键词：

TiO2; Graphene; Graphene Oxide; Photocatalysts; Photocatalytic Reduction; NANOPARTICLES; ADSORPTION; REMOVAL; TITANIA; OXIDE; DYE;

D O I：

10.1166/jnn.2016.11612

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Reduced graphene oxide (RGO)/TiO2 nanocomposite was successfully prepared by UV-assisted photocatalytic reduction of graphene oxide (XGO) by TiO2 nanoparticles in ethanol. The effects of XGO and RGO addition in TiO2 were characterized by transmission electron microscopy (TEM), X-ray diffractometer (XRD), diffuse reflectance UV vis spectrophotometer (UV vis), fourier-transform infrared spectroscopy (FTIR), photoluminescence (PL), and Brunauer-Emmett-Teller (BET) and Barrett-Joiner-Halenda (BJH) porosity analysis. The photocatalytic activity of prepared nanocomposites was evaluated from the kinetics of the photocatalytic degradation of cationic methylene blue dye under UV irradiation. Bandgap, the electron hole recombination, specific surface area, surface functional groups, and adsorption capacity of nanocomposites were found to play a significant role in the degradation. The results revealed that RGO/TiO2 and XGO/TiO2 nanocomposites exhibited efficient charge separation and enhanced photocatalytic activity, compared to pristine TiO2. Nearly 500% improvement was observed in this work.

引用

页码：296 / 302

页数：7

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