Effects of Hydroxy Groups in Anthraquinone Dyes on Photocatalytic Activity of Visible-light-sensitized Pt-TiO2 for Hydrogen Evolution

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Surveys from Asia Pub Date : 2022-10-20 DOI:10.1007/s10563-022-09370-y

Fumiaki Amano, Yasukazu Akaki, Akira Yamakata

引用次数: 1

Abstract

Alizarin (1,2-dihydroxyanthraquinone) is a stable red photoredox sensitizer. We explored the effect of the hydroxy substituents of 9,10-anthraquinone (AQ) molecules on the photocatalytic hydrogen evolution over a dye-sensitized Pt-TiO₂ system under visible-light irradiation. The 2-hydroxy group in AQ dyes was necessary to induce photocatalytic H₂ evolution. By contrast, the 1-hydroxy group was the anchoring group to increase the adsorption amount of the dyes on the TiO₂ surface. Using time-resolved infrared spectroscopy, we found that the 2-hydroxy group enhances the electron injection and suppresses the back electron transfer from TiO₂ particles to the dye.

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蒽醌染料中羟基对可见光敏化Pt-TiO2析氢光催化活性的影响

茜素(1,2-二羟基蒽醌)是一种稳定的红色光氧化还原敏化剂。研究了9,10-蒽醌(AQ)分子羟基取代基对可见光下染料敏化Pt-TiO2体系光催化析氢的影响。AQ染料中的2-羟基是诱导光催化析氢所必需的。1-羟基为锚定基团，增加染料在TiO2表面的吸附量。利用时间分辨红外光谱，我们发现2-羟基增强了电子注入，抑制了TiO2粒子向染料的反向电子转移。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catalysis Surveys from Asia 化学-物理化学

CiteScore

4.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.