Alizarin-TiO2 LMCT Complex with Oxygen Vacancies:An Efficient Visible Light Photocatalyst for Cr(Ⅵ)Reduction  

作　　者：Meichen Li Yarn Li Jingyu Zhao Mingcheng Li Yongchuan Wu Ping Na 

机构地区：[1]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China [2]School of Materials and Chemical Engineering,Anhui Jianzhu University,Hefei,Anhui 230601,China [3]School of Chemistry,Biology,and Materials Science,East China University of Technology,Nonchang,Jiangxi 330013,China

出　　处：《Chinese Journal of Chemistry》2020年第11期1332-1338,共7页中国化学（英文版）

基　　金：This work was supported by the National High Technology Research and Development Program of China(863 Program)(No.2012AA063504);the National Natural Science Foundation of China(Nos.U1407116,21511130020,21276193,201405008);the Tianjin Municipal Natural Science Foundation(No.13JCZDJC35600).

摘　　要：of main observation and conclusion The AL-P25 composites(AL=alizarin,P25=nano titanium dioxide)with oxygen vacancies were synthesized by a simple hydrothermal method and applied for the photoreduction of Cr(VI)under visible light.The AL-P25 composites were characterized by scanning electron microscopy,X-ray diffraction,X-ray photoelectron spectroscopy analysis,Fourier transform infrared spectrometer,thermo-gravimetric analysis,UV-vis diffuse reflectance spectroscopy,photoluminescence spectroscopy and electron paramagnetic resonance spectroscopy.The results suggested that the AL-P25 composites were successfully prepared,and alizarin was linked to P25 via Ti—O—C bonds.AL-P25 composites represented excellent photoreduction efficiency on Cr(VI)under visible light,which was 99.4%after 60 min of illumination.Finally,a photocatalytic mechanism of AL-P25 composites was proposed that ligand-metal charge transfer(LMCT)process between alizarin and P25 effectively enhances separation efficiency of photogenerated electrons and holes.

关 键 词：spectroscopy. COMPOSITES VISIBLE 

分 类 号：O643.36[理学—物理化学]