Decomposition of water over Picene-derivatized photocatalysts under visible light irradiation.

IF 2.6 4区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Hayato Shiroma, Yusuke Motoyama, Hiroshi Danjo, Yuichi Ichihashi
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引用次数: 0

Abstract

Inorganic semiconductors such as TiO2 absorb ultraviolet light to promote reactions. However, sunlight consists mainly of visible light, and so the development of photocatalysts that can use visible light is being actively researched. Density functional theory (DFT) calculations previously showed that the introduction of formyl, carboxyl, and carboxyethyl groups into picene can absorb visible light and generate hydrogen via the decomposition of water. In this study, these substituted picene derivatives were employed as photocatalysts, and their water photolysis activities were evaluated under visible light irradiation. All three picene derivatives were active photocatalysts, with hydrogen production activities decreasing in the order of: picene-13-carbaldehyde (CHO-picene) > picene-13-carboxylic acid (COOH-picene) ≈ Ethyl picene-13-carboxylate (COOEt-picene) > picene. Subsequently, the effects of the three functional groups on the hydrogen production activity in the water photolysis reaction were investigated in further detail. The effects of the functional groups were found to be in accordance with the Hammett equation, wherein a greater electron-withdrawing property led to a higher hydrogen production activity.

可见光照射下苯二烯衍生光催化剂上水的分解。
二氧化钛等无机半导体吸收紫外光促进反应。然而,太阳光主要由可见光组成,因此人们正在积极研究利用可见光的光催化剂的开发。密度泛函理论(DFT)计算表明,壬烯中引入甲酰基、羧基和羧基乙基可以吸收可见光,并通过水的分解产生氢。本研究以这些取代蒎烯衍生物为光催化剂,在可见光照射下评价了它们的水光解活性。三种蒎烯衍生物均为活性光催化剂,产氢活性依次为:蒎烯-13-甲醛(CHO-picene) >蒎烯-13-羧酸(COOH-picene)≈乙基蒎烯-13-羧酸酯(COOEt-picene) > picene。随后,进一步研究了三个官能团对水光解反应产氢活性的影响。官能团的影响与哈米特方程一致,其中更大的吸电子性导致更高的产氢活性。
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
Photochemistry and Photobiology
Photochemistry and Photobiology 生物-生化与分子生物学
CiteScore
6.70
自引率
12.10%
发文量
171
审稿时长
2.7 months
期刊介绍: Photochemistry and Photobiology publishes original research articles and reviews on current topics in photoscience. Topics span from the primary interaction of light with molecules, cells, and tissue to the subsequent biological responses, representing disciplinary and interdisciplinary research in the fields of chemistry, physics, biology, and medicine. Photochemistry and Photobiology is the official journal of the American Society for Photobiology.
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