title: Graphitic-C(3)N(4)-hybridized TiO(2) nanosheets with reactive {001} facets to enhance the UV- and visible-light photocatalytic activity.
abstract: AnataseTiO(2)nanosheets with dominant {001} facets were hybridized with graphitic carbon nitride (g-C(3)N(4)) using a facile solvent evaporation method. On top of the superior photocatalytic performance of highly reactive {001} facets, the hybridization with g-C(3)N(4) is confirmed to further improve the reactivity through degrading a series of organic molecules under both UV- and visible-light irradiation. It is proposed that an effective charge separation between g-C(3)N(4) and TiO2 exists in the photocatalytic process, i.e., the transferring of photogenerated holes from the valence band (VB) of TiO(2) to the highest occupied molecular orbital (HOMO) of g-C(3)N(4), and the injecting of electrons from the lowest unoccupied molecular orbital (LUMO) of g-C(3)N(4) to the conduction band (CB) of TiO(2). Due to this synergistic effect, the enhancement of UV- and visible-light photoactivity over the hybrid is achieved. Furthermore, it has been revealed that holes were the main factor for the improved photoactivity under UV-light, while the OH radicals gained the predominance for degrading organic molecules under visible-light. Overall, this work would be significant for fabricating efficient UV-/visible-photocatalysts and providing deeper insight into the enhanced mechanisms of π-conjugated molecules hybridized semiconductors.
authors: Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China.
authors: Liuan
authors: L
authors: Gu
authors: School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China. Electronic address: jingyu.wang@163.com.
authors: Jingyu
authors: J
authors: Wang
authors: Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China.
authors: Zhijuan
authors: Z
authors: Zou
authors: Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China. Electronic address: hanxj63@yahoo.com.cn.
authors: Xijiang
authors: X
authors: Han
mesh_terms: D002384:Catalysis; D004785:Environmental Pollutants / Q000737:chemistry / Q000528:radiation effects; D052918:Environmental Restoration and Remediation / Q000379:methods; D006108:Graphite / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D009570:Nitriles / Q000737:chemistry*; D010777:Photochemistry; D012666:Semiconductors; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D004785:Environmental Pollutants; D009570:Nitriles; C009495:titanium dioxide; C011206:cyanogen; D006108:Graphite; D014025:Titanium
keywords: Graphitic-C(3)N(4); Hybrid materials; Photocatalysis; TiO(2); {001} facets