Hydrophilicity Control of Visible-Light Hydrogen Evolution and Dynamics of the Charge-Separated State in Dye/TiO<sub>2</sub>/Pt Hybrid Systems
作者:Won-Sik Han、Kyung-Ryang Wee、Hyun-Young Kim、Chyongjin Pac、Yu Nabetani、Daisuke Yamamoto、Tetsuya Shimada、Haruo Inoue、Heesung Choi、Kyeongjae Cho、Sang Ook Kang
DOI:10.1002/chem.201201500
日期:2012.11.26
Visible‐light‐driven H2 evolution based on Dye/TiO2/Pt hybrid photocatalysts was investigated for a series of (E)‐3‐(5′‐4‐[bis(4‐R1‐phenyl)amino]phenyl}‐4,4′‐(R2)2‐2,2′‐bithiophen‐5‐yl)‐2‐cyanoacrylic acid dyes. Efficiencies of hydrogen evolution from aqueous suspensions in the presence of ethylenediaminetetraacetic acid as electron donor under illumination at λ>420 nm were found to considerably depend
研究了基于染料/ TiO 2 / Pt杂化光催化剂的可见光驱动的H 2演化,用于一系列(E)-3-(5′-4- [bis(4-R 1-苯基)氨基]苯基} -4,4' - (R 2)2 -2,2'-联噻吩-5-基)-2-氰基丙烯酸染料。发现在乙二胺四乙酸作为电子供体的情况下,在λ > 420 nm的光照下,从水性悬浮液中析出的氢的效率很大程度上取决于R 1的亲水特性,其变化顺序为MOD(R 1 = CH 3 OCH 2, R 2 = H)≈MO4D(R 1= R 2= CH 3 OCH 2)>HD(R 1= R 2= H)>PD(R 1= C 3 H 7,R 2= H)。在MOD / TiO 2 / Pt的情况下,在436nm处光催化的H 2产生的表观量子产率为0.27±0.03。对MOD-或PD接枝的TiO 2纳米颗粒透明膜浸入pH为3的水中进行瞬态吸收测量,通常显示染料自由基阳离子(Dye