Synthesis of Visible-Light Responsive Graphene Oxide/TiO₂ Composites with p/n Heterojunction

Abstract

Graphene oxide/TiO(2) composites were prepared by using TiCl(3) and graphene oxide as reactants. The concentration of graphene oxide in starting solution played an important role in photoelectronic and photocatalytic performance of graphene oxide/TiO(2) composites. Either a p-type or n-type semiconductor was formed by graphene oxide in graphene oxide/TiO(2) composites. These semiconductors could be excited by visible light with wavelengths longer than 510 nm and acted as sensitizer in graphene oxide/TiO(2) composites. Visible-light driven photocatalytic performance of graphene oxide/TiO(2) composites in degradation of methyl orange was also studied. Crystalline quality and chemical states of carbon elements from graphene oxide in graphene oxide/TiO(2) composites depended on the concentration of graphene oxide in the starting solution. This study shows a possible way to fabricate graphene oxide/semiconductor composites with different properties by using a tunable semiconductor conductivity type of graphene oxide.

One‐dimensional TiO2 Nanotube Photocatalysts for Solar Water Splitting

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Novel Synthesis of Plasmonic Ag/AgCl@TiO2 Continues Fibers with Enhanced Broadband Photocatalytic Performance

“…[7,8], coupling with other semiconductors (GO and BiVO 4 , etc.) [9,10], and depositing with noble metals (Au and Ag, etc.) [11][12][13][14].…”

RhB Adsorption Performance of Magnetic Adsorbent Fe3O4/RGO Composite and Its Regeneration through A Fenton-like Reaction

“…Graphene oxide was prepared by a modified Hummers' method [32,33]. Briefly, graphite oxide was obtained by oxidizing graphite powder with the presence of H 2 SO 4 , NaNO 3 and KMnO 4 .…”

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