One-pot self-assembled three-dimensional TiO2-graphene hydrogel with improved adsorption capacities and photocatalytic and electrochemical activities.
One-pot self-assembled three-dimensional TiO2-graphene hydrogel with improved adsorption capacities and photocatalytic and electrochemical activities.
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DOI：
10.1021/am303299r
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发表时间：
2013-03
影响因子：
9.5
通讯作者：
Zheye Zhang;Fei Xiao;Yunlong Guo;Shuai Wang;Yunqi Liu
中科院分区：
文献类型：
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作者：
Zheye Zhang;Fei Xiao;Yunlong Guo;Shuai Wang;Yunqi Liu
我们报道了一种新型的多功能二氧化钛（TiO 2）-石墨烯纳米复合水凝胶（TGH）的发展，通过一锅水热法，并探讨其作为光催化剂，可重复使用的吸附剂，和超级电容器的环境和能源应用。在水热反应过程中，石墨烯纳米片和TiO 2纳米颗粒自组装形成三维互联网络，其中尺寸均匀的球形TiO 2纳米颗粒紧密锚定在石墨烯纳米片上。我们已经表明，所得的TGH显示出组装的石墨烯纳米片和TiO 2纳米颗粒的协同效应，因此表现出独特的物理和化学性质的集合，例如与原始石墨烯水凝胶和TiO 2纳米颗粒相比，增加的吸附容量，增强的光催化活性和改善的电化学电容性能。这些功能共同证明了3D TGH作为环境和能量存储问题中多功能应用的有吸引力的宏观器件的潜力。
We reported the development of a new type of multifunctional titanium dioxide (TiO2)-graphene nanocomposite hydrogel (TGH) by a facile one-pot hydrothermal approach and explored its environmental and energy applications as photocatalyst, reusable adsorbents, and supercapacitor. During the hydrothermal reaction, the graphene nanosheets and TiO2 nanoparticles self-assembled into three-dimensional (3D) interconnected networks, in which the spherical nanostructured TiO2 nanoparticles with uniform size were densely anchored onto the graphene nanosheets. We have shown that the resultant TGH displayed the synergistic effects of the assembled graphene nanosheets and TiO2 nanoparticles and therefore exhibited a unique collection of physical and chemical properties such as increased adsorption capacities, enhanced photocatalytic activities, and improved electrochemical capacitive performance in comparison with pristine graphene hydrogel and TiO2 nanoparticles. These features collectively demonstrated the potential of 3D TGH as an attractive macroscopic device for versatile applications in environmental and energy storage issues.