A ternary TiO2/WO3/graphene nanocomposite adsorbent: facile preparation and efficient removal of Rhodamine B
来源期刊：International Journal of Minerals Metallurgy and Materials2014年第8期
论文作者：Yong-qiang Zhang Xiao-hui Li Jie Lü Chong-dian Si Guang-jun Liu Hong-tao Gao Pi-bo Wang
文章页码：813 - 819
摘 要：Ternary TiO2/WO3/graphene（TWG） nanocomposites were prepared by a facile salt-ultrasonic assisted hydrothermal method. The products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption–desorption. Both anatase TiO2 and orthorhombic WO3 formed in the nanocomposites, along with a highly disordered overlay of individual graphene nanosheets. Polyhedral and spherical TiO2 and WO3 nanoparticles of uniform size 10–30 nm were densely anchored to the graphene sheets. The maximum specific surface area of the products was 144.59 m2·g-1. The products showed clear abilities for the removal of Rhodamine B in the absence of illumination. Furthermore, the adsorption activity of the products exhibited only a slight decrease after three successive cycles. The results demonstrate that the ternary nanocomposites could be used as a high-efficiency adsorbent for the removal of environmental contaminants.
Yong-qiang Zhang1，Xiao-hui Li2，Jie Lü2，Chong-dian Si1，Guang-jun Liu1，Hong-tao Gao1,2，Pi-bo Wang3
1. Department of Chemistry and Chemical Engineering, Jining University2. State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology3. North China Sea Branch of State Oceanic Administration
摘 要：Ternary TiO2/WO3/graphene（TWG） nanocomposites were prepared by a facile salt-ultrasonic assisted hydrothermal method. The products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption–desorption. Both anatase TiO2 and orthorhombic WO3 formed in the nanocomposites, along with a highly disordered overlay of individual graphene nanosheets. Polyhedral and spherical TiO2 and WO3 nanoparticles of uniform size 10–30 nm were densely anchored to the graphene sheets. The maximum specific surface area of the products was 144.59 m2·g-1. The products showed clear abilities for the removal of Rhodamine B in the absence of illumination. Furthermore, the adsorption activity of the products exhibited only a slight decrease after three successive cycles. The results demonstrate that the ternary nanocomposites could be used as a high-efficiency adsorbent for the removal of environmental contaminants.
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