Coating of Chlorophylls a and b Enhanced Photoelectrochemical Capacitor Reaction of TiO2/MnO2 Composite Electrode.

叶绿素 a 和 b 涂层增强 TiO2 / MnO2 复合电极的光电化学电容器反应。

• 发表时间: 2024 Jun 17
• 来源期刊: ACS Appl Bio Mater
• DOI: 10.1021/acsabm.4c00494
• PMID: 38817210
• 文章类型: Journal Article
• 作者列表: Usui H,Nakanishi K,Yonekawa K,Kojima H,Domi Y,Oishi N,Nitta N,Sakaguchi H

关键词: Chlorophyll a; Chlorophyll b; MnO2; Photoelectrochemical reaction; Photosynthesis; Photovoltage; TiO2

Mesh: Titanium / chemistry; Manganese Compounds / chemistry; Electrodes; Oxides / chemistry; Particle Size; Materials Testing; Chlorophyll / chemistry; Electrochemical Techniques; Surface Properties

Abstract

We prepared composite electrodes using TiO2 coated with chlorophylls a and b as photoelectric conversion material and MnO2 as energy storage material and investigated their photoelectrochemical capacitor properties. The coating with the combination of chlorophylls a and b improved the photoelectric conversion function of TiO2, compared with the coating with each alone. Na+ adsorption on MnO2 was enhanced with increasing the chlorophyll coating amount. The reason is that more chlorophylls a and b absorb visible light in different wavelengths to promote an easier photoexcited electron transfer to MnO2, just as they improve the efficiency of photosynthesis reactions in nature.

摘要

我们以叶绿素a和b包覆的TiO2作为光电转换材料，MnO2作为储能材料制备了复合电极，并研究了其光电化学电容器性能。与各自单独的涂层相比，叶绿素a和叶绿素b的组合涂层改善了TiO2的光电转换功能。Na+对MnO2的吸附随叶绿素包覆量的增加而增强。原因是更多的叶绿素a和b吸收不同波长的可见光，以促进更容易的光激发电子转移到MnO2，就像它们提高自然界中光合作用反应的效率一样。