文献类型：期刊文献

中文题名：溶剂热法制备TiO2／g-C3N4及其光催化性能

英文题名：Solvothermal Synthesis and Photocatalytic Performance of TiO_2 g-C_3N_4 Photocatalyst

作者：董海军[1];陈爱平[1];何洪波[1];吕慧[1];李春忠[1]

机构：[1]华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海200237

年份：2013

卷号：39

期号：5

起止页码：536

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：上海市科委纳米专项(1052nm02400);国家自然科学基金(20925621)

语种：中文

中文关键词：TiO2纳米晶;TiO2;g—C3N4;g-C3N4;可见光响应;质子化处理;光催化

外文关键词：porous TiO2 nanocrystalline; TiO2/g-Ca N4 ; g-C3 N4 ; visible-light response; protonation; photocatalysis

摘要：采用溶剂热法合成了可见光响应的TiO_2/g-C_3N_4复合光催化剂,并对TiO_2/g-C_3N_4进行质子化处理。通过X射线衍射(XRD)、氮气吸附-脱附BET法、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶红外光谱(FT-IR)、紫外-可见漫反射(UV-vis DRS)和荧光光谱(PL)等方法对样品进行了表征,并以甲基橙(MO)光催化降解为模型反应,考察了可见光下制备的样品的光催化性能。结果表明,多孔TiO_2纳米晶与g-C_3N_4形成具有"芝麻饼"形貌的复合结构;TiO_2/g-C_3N_4复合光催化剂的光吸收带边扩展到465 nm,较TiO_2出现明显红移;TiO_2与g-C_3N_4能带匹配耦合,有效地抑制了电子与空穴的复合;质子化处理过程能够提高可见光区吸收强度和电子的传导能力,增强了TiO_2的光催化活性。
TiO2/g-CaN4 composite photocatalyst with visible-light response was synthesized by the solvothermal method, and then the as-synthesized photocatalyst was protonated. The samples were characterized by X-ray diffraction（XRD）, nitrogen absorption-desorption, scanning electron microscope（SEM）, transmission electron microsope（TEM）, Fourier transform infrared spectrometer （FT-IR）, UV-vis diffuse reflect spectroscope （UV-vis DRS） and photoluminescence spectra （PL）. The photocatalytic performance of the TiO2/g-CaN4 was evaluated by the degradation of methylene orange （MO） under the visible light. The results show that porous Ti（）2 nanocrystalline and g-C_~ N~ are able to form ＂sesame cake＂ composite structure. The absorption edge of TiO2 / g-CaN4 photocatalyst expands to 465 nm, which appears remarkable red shift compared with TiOz. The coupling of TiO2 and g-C3N4 with suitably matching band level of conduction and valance bands provides TiO2/g-C3N4 photocatalyst with the driving forces to separate and transfer photogenerated electron-hole pairs. The protonation process can improve the absorption of visible light, increase electronic transfer ability and enhance the TiO2/g-C3N4 photocatalyst activity.