Studies on the Protein- Chlorophyll Artificial Complexes Bearing Hydrogen-Evolving Function

具有放氢功能的蛋白质-叶绿素人工复合物的研究

• 批准号: 15550017
• 负责人: KUSUMOTO Yoshihumi
• 金额: $ 2.24万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15550017/
• 关键词: polypeptide; chlorophyll; artificial photosynthesis; hydrogen production; photocatalyst; titanium oxide; graphite silica; carbon nanotube; 水素ガス; クロロフィル; ポルフィリン; 白金コロイド; 二次構造; 電子移動

In this work, the photoinduced hydrogen production with systems containing water insoluble chlorophyll a (Chla) or Co(II)tetraphenylporphyrin (CoTPP), and also methylviologen, platinum colloidal catalyst and ethylenediaminetetraacetic acid was investigated. Chla and CoTPP were dissolved in aqueous poly (L-glutamate) and decylammonium chloride (DeAC) surfactant solutions.The systems were characterized in the absence and presence of methylviologen using spectroscopic methods such as circular dichroism, absorption spectroscopy, Fourier-transformed infra-red spectroscopy, steady state fluorescence spectroscopy and fluorescence lifetime measurements.The spectroscopic studies indicate that Chla and CoTPP are incorporated into poly(L-glutamate)-surfactant complexes accompanying a conformation change from the random coil to the α-helix of poly(L-glutamate). A conformation- dependent electron transfer also occurs between Chla or CoTPP and methylviologen.A drastic increase in the evolution rate of hydrogen occurred for both photocatalysts (Chla and CoTPP) under the visible-light irradiation in the presence of the poly (L-glutamate)-DeAC complex than in the absence of the complex.We also observed the drastic synergy effect of titanium oxide (a typical semiconductor photocatalyst) and graphite silica (one of natural minerals) or single-walled carbon nanotube for the production of hydrogen gas in water-alcohol mixtures.We are now challenging to the practical hydrogen production on the basis of the present results.

本文研究了不溶性叶绿素a （Chla）或Co（II）四苯基卟啉（CoTPP）、甲基紫素、铂胶体催化剂和乙二胺四乙酸的光诱导制氢反应。Chla和CoTPP分别溶于聚谷氨酸和十二烷基氯化铵（DeAC）表面活性剂水溶液中。利用圆二色、吸收光谱、傅里叶变换红外光谱、稳态荧光光谱和荧光寿命测量等光谱方法对甲基紫素的存在和不存在进行了表征。光谱研究表明，Chla和CoTPP被纳入聚l -谷氨酸-表面活性剂配合物中，并伴随着聚l -谷氨酸的构象从随机螺旋形转变为α-螺旋形。构象依赖的电子转移也发生在Chla或CoTPP和甲基紫蛋白之间。光催化剂（Chla和CoTPP）在聚l -谷氨酸-DeAC配合物存在的可见光照射下，氢的析出速率比不存在该配合物时显著增加。我们还观察到氧化钛（一种典型的半导体光催化剂）和石墨二氧化硅（一种天然矿物）或单壁碳纳米管在水-酒精混合物中产生氢气的巨大协同效应。在现有成果的基础上，对实际制氢提出了挑战。

项目成果

Spectroscopic studies of pyrene adsorbed to titanium dioxide

• DOI: 10.1016/s0009-2614(03)01240-5
• 发表时间: 2003-08
• 期刊: Chemical Physics Letters
• 影响因子: 2.8
• 作者: Xing Jin;Y. Kusumoto

Drastic Synergy Effect of Graphite Silica and Titanium Dioxide on Photocatalytic Hydrogen Production from Water-Methanol Mixtures

石墨二氧化硅和二氧化钛对水-甲醇混合物光催化制氢的巨大协同作用

• 发表时间: 2005
• 期刊: Proceedings of the World Hydrogen Technologies Convention 2005
• 作者: K.H.Kurniawan;M.Ikeda
• 通讯作者: M.Ikeda

光触媒及びその製造方並びにそれを用いた水素の製造方法

光催化剂、其制造方法以及使用其制造氢的方法

• 发表时间: 2004

Thermodynamic and Spectroscopic Studies of Pyrene Adsorbed to Titanium Dioxide from Water-Alcohol Mixtures

水-醇混合物中二氧化钛吸附芘的热力学和光谱研究

• 发表时间: 2004
• 期刊: Research Journal of Chemistry and Environment 8
• 作者: K.H.Kurniawan;M.Ikeda;B.Ahmmad;P.Ngweniform;M.Ikeda;M.Ikeda;P.Ngweniform;B.Ahmmad;K.H.Kurniawan;Y.Kusumoto;X.Jin
• 通讯作者: X.Jin

光触媒及びその製造方法並びにそれを用いた水素の製造方法

光催化剂、其制造方法以及使用其制造氢的方法

• 发表时间: 2004