CAJ | 학술논문

以表面活性剂十六烷基三甲基溴化铵( CTAB)为模板,钛酸四正丁酯为钛源,偏钒酸铵为掺杂离子前驱体,通过液晶模板辅助溶胶-凝胶法制备钒掺杂介孔TiO2( VMT),采用X射线衍射( XRD)、 N2吸附-脱附分析、热重-差热分析( TG-DTA)、 X射线光电子能谱( XPS)、紫外-可见光谱( UV-Vis)和透射电子显微镜( TEM)等对样品结构进行表征,选择亚甲基蓝为目标降解物,对VMT的可见光催化性能进行了研究.结果表明,钒掺杂减小了介孔TiO2( MT)的粒径和光生电子-空穴复合率,增大了比表面积及Ti3+和羟基浓度,导致VMT比纯MT和P25光催化活性高,并且钒掺杂使MT带隙能降低,使其具有很高的可见光催化活性.最佳的光催化条件为：VMT的浓度为0.83 g/L, MB的浓度为1 mg/L.
이표면활성제십륙완기삼갑기추화안( CTAB)위모판,태산사정정지위태원,편범산안위참잡리자전구체,통과액정모판보조용효-응효법제비범참잡개공TiO2( VMT),채용X사선연사( XRD)、 N2흡부-탈부분석、열중-차열분석( TG-DTA)、 X사선광전자능보( XPS)、자외-가견광보( UV-Vis)화투사전자현미경( TEM)등대양품결구진행표정,선택아갑기람위목표강해물,대VMT적가견광최화성능진행료연구.결과표명,범참잡감소료개공TiO2( MT)적립경화광생전자-공혈복합솔,증대료비표면적급Ti3+화간기농도,도치VMT비순MT화P25광최화활성고,병차범참잡사MT대극능강저,사기구유흔고적가견광최화활성.최가적광최화조건위：VMT적농도위0.83 g/L, MB적농도위1 mg/L.
Based on employing the liquid crystal of surfactant cetyltrimethyl ammonium bromide ( CTAB ) , tetrabutyl titanate and ammonium metavanadate as template, titanium source and doping-ion precursor, respectively, vanadium-doped mesoporous titanium dioxide ( VMT ) was obtained by sol-gel method. The structure of obtained sample was characterized via X-ray diffraction(XRD), nitrogen adsorption-desorption, thermogravimetry-differential thermal analysis ( TG-DTA ) , X-ray photoelectron spectroscopy ( XPS ) , UV-Visible diffuse reflection spectrometry( UV-Vis) and transmission electronic microscopy( TEM) . Choosing methylene blue( MB) as the target degradation product, the photocatalytic performance of VMT was discussed under visible light irradiation. The results show that doping vanadium can reduce TiO2 particle size, inhibit photo-electron and hole recombination rate as well as increase specific surface area and the concentration of titanium ion and hydroxyl. Thus VMT exhibits the highest catalytic activity among pure MT, VMT and P25 under UV-light irradiation. In addition, doping vanadium can also lessen MT band-gap energy and improve its catalytic activity under visible light. The optimal photocatalytic condition is as follows: catalyst concentration of 0. 83 g/L and MB concentration of 1 mg/L.