TiO2-graphene nanocomposites.: UV-assisted photocatalytic reduction of graphene oxide
TiO2-graphene nanocomposites.: UV-assisted photocatalytic reduction of graphene oxide
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DOI：
10.1021/nn800251f
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发表时间：
2008-07-01
期刊：
影响因子：
17.1
通讯作者：
Kamat, Prashant V.
中科院分区：
文献类型：
--
作者：
Williams, Graeme;Seger, Brian;Kamat, Prashant V.
氧化石墨烯悬浮在乙醇中进行还原，因为它接受电子从紫外线照射的二氧化钛悬浮液。还原伴随着氧化石墨烯吸收的变化，因为悬浮液的颜色从棕色变为黑色。TiO 2颗粒和石墨烯片之间的直接相互作用阻碍了石墨烯剥离片的塌陷。固体薄膜铸造的硼硅酸盐玻璃间隙分开的金溅射终端显示一个数量级的横向电阻减少后，与二氧化钛光催化剂。光催化方法不仅提供了一种按需的紫外辅助还原技术，而且开辟了获得光活性石墨烯-半导体复合材料的新途径。
Graphene oxide suspended in ethanol undergoes reduction as it accepts electrons from UV-irradiated TiO2 suspensions. The reduction is accompanied by changes in the absorption of the graphene oxide, as the color of the suspension shifts from brown to black. The direct interaction between TiO2 particles and graphene sheets hinders the collapse of exfoliated sheets of graphene. Solid films cast on a borosilicate glass gap separated by gold-sputtered terminations show an order of magnitude decrease in lateral resistance following reduction with the TiO2 photocatalyst. The photocatalytic methodology not only provides an on-demand UV-assisted reduction technique but also opens up new ways to obtain photoactive graphene-semiconductor composites.