ynthesis and Characterization of a New Organic Photosensitizer and its Application in Photocatalytic H_2 Production by Sensitized Nano-TiO_2 under Visible Light Irradiation

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摘要:

以三苯胺和苯乙酮为原料,设计合成了一个新的具有D-π-A结构的有机光敏剂(E)-2-氰基-2-((Z)-5-(4-(二苯基氨基)亚苄基)-4-苯基噻唑-2(5H)-亚基)乙酸乙酯(TPAD),并通过核磁1 HNMR,13 CNMR,IR,UV-Vis,XRD和SEM等手段对目标化合物的结构和性质进行表征.制备了复合光催化剂TPAD/Pt(w=0.5%)TiO_2,构建了以TPAD/Pt(w=0.5%)/TiO_2为光催化剂,三乙胺为牺牲剂的产氢体系,系统研究了三乙胺的体积分数、乙腈与水的比例及溶液的pH值等因素对目标光催化剂析氢活性的影响.结果表明:在可见光照射下,当三乙胺的体积分数浓度为5%,pH值为10,乙腈/水的体积比为1∶1时,经3h光照后,体系的析氢量达最大值370μmol,平均析氢速率达25 933.3μmol·h-1·g-1.

A new triphenylamine derivative organic photosensitizer （PS） with D- π- A structure, naming （E）-2-cyano-2- （（Z）-5-（4-（diphenylamino） benzylidene）-4-phenylthiazol 2（5H） ylidene）acetic acid （TPAD） had been designed and synthesized using triphenylamine and acetophenone as raw materials, and the structures of target compound TPAD were characterized by HNMR, 13 CNMR, IR, UV-Vis, XRD and SEM. And then, the target photosensitive catalyst TPAD/Pt （w = 0.5% ）/TiOz was prepared and the Hz production activity of the system composing TPAD/Pt（w= 0.5% ）/TiO2 as photosensitive catalyst, trieth ylamine （TEA） as sacrificial agent was systematically evaluated. The factors which affected the Hz production activity of the system such as the volume fraction of TEA, the ratio of CHa CN/He O and the pH value of the medium were investigated in de- tail. The result showed that the hydrogen production reached a maximum of 370 μmol, the average hydrogen evolution rate was up to 25 933.3 μmol·h-1·g-1 under the optimal conditions with volume fraction of TEA 50/00, pH 10 in CH3CN/HzO （v/v, 1/1） in 3h irradiation of visible light, respectively.

作者:

郑会勤王瑾司晚令李慧灵

机构地区:

河南教育学院化学与环境学院

出处:

《betway官方app 学报：自然科学版》 CAS 北大核心 2016年第4期74-82,共9页

基金:

河南省科技计划项目(142102310258) 河南省教育厅科学技术重点研究项目(14A150044)

关键词:

有机光敏剂三苯胺衍生物光解析氢

organic photosensitizer triphenylamine derivatives photocatalytic H2 production

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