4-二苯胺基苯甲醇功能化石墨烯的制备、电子传递及光催化性能  

Preparation, Electron Transfer and Photocatalysis of 4-(N,N-Diphenylamine) Benzyl Alcohol Functionalized Graphene

作　　者：董玉培[1] 牟志刚[1] 杜玉扣[1] 杨平[1] 

机构地区：[1]苏州大学材料与化学化工学部,苏州215123

出　　处：《化学学报》2011年第20期2379-2384,共6页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.20673075;50973077;51073114);江苏省自然科学基金(No.BK2010209);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：在碱性条件下由氧化石墨(GO)还原获得还原石墨烯(RGO).RGO与4-二苯胺基苯甲醇(TPACH2OH)混合后发生相互作用,得到功能化石墨烯复合物(TPACH2OH-RGO).采用密度泛函理论(DFT)对TPACH2OH-RGO模拟计算结果表明,TPACH2OH和RGO之间主要通过氢键作用形成复合物.利用紫外-可见光谱(UV-vis)、拉曼光谱(Raman)、荧光光谱(Fluorescence)、原子力显微镜(AFM)、透射电子显微镜(TEM)和电化学等方法研究了TPACH2OH-RGO结构和光电性质,并研究了以TPACH2OH-RGO为催化剂在光照射下光催化分解水制氢性能.实验结果表明:光照下复合物中激发态TPACH2OH向RGO转移电子.在TPACH2OH和RGO的质量比为4/3,体系pH=6条件下,光照6 h,TPACH2OH-RGO的产氢总量达到35.0μmol,比RGO的产氢总量(20.4μmol)有明显的提高.The reduced graphene oxide（RGO） was prepared by the reduction of graphite oxide（GO） under alkaline conditions.4-（N,N-Diphenylamine） benzyl alcohol functionalized graphene（TPACH2OH-RGO） were formed by stirring the mixture of TPACH2OH and RGO at room temperature.Density functional method（DFT） studies show that hydrogen bond is present between TPACH2OH and RGO in TPACH2OH-RGO.The structure and photoelectric properties of TPACH2OH-RGO conjugate were investi-gated by using ultraviolet-visible spectra（UV-vis）,Raman spectra（Raman）,fluorescence spectra（Fl）,atomic force microscopy（AFM）,transmission electron microscopy（TEM） and electrochemical method.The TPACH2OH-RGO conjugate was employed as a photocatalyst for H2 generation from water under ultraviolet-visible light illumination.The experiment results indicated that electron transfer occurred from the excited-state of TPACH2OH to RGO.When the mass ratio of TPACH2OH to RGO is 4/3,the total amount of H2 evolved from the TPACH2OH-RGO system at pH 6 after 6 h irradiation was 35.0 μmol,which is higher than that produced from the RGO（20.4 μmol）.

关 键 词：石墨烯 4-二苯胺基苯甲醇 电子转移 光催化 氢气 

分 类 号：O621.3[理学—有机化学]