JP6452159B2 - 光化学反応装置、その製造方法および光化学反応方法 - Google Patents
光化学反応装置、その製造方法および光化学反応方法 Download PDFInfo
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- JP6452159B2 JP6452159B2 JP2015529601A JP2015529601A JP6452159B2 JP 6452159 B2 JP6452159 B2 JP 6452159B2 JP 2015529601 A JP2015529601 A JP 2015529601A JP 2015529601 A JP2015529601 A JP 2015529601A JP 6452159 B2 JP6452159 B2 JP 6452159B2
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- 239000001257 hydrogen Substances 0.000 claims description 22
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Description
光化学反応装置は、水素を生成させる光化学反応に用いられるものであり、
光化学反応装置は、多数の細孔(2)を有し、かつ、光を透過する多孔質ガラス(1)を備え、
細孔(2)内部に、少なくとも光増感剤、電子輸送体および還元反応用の触媒が配置されており、
多孔質ガラスの平均細孔径は、20〜75nmであり、
光増感剤は、金属化合物であり、
電子輸送体は、メチルビオロゲン、メチレンブルー、酸化チタンのいずれか1つであり、
多孔質ガラスは、光化学反応の際に、大気下に置かれた状態とされることを特徴としている。
(実施例1)
電子供与体としての20 mM エチレンジアミン4酢酸(EDTA)、光増感剤としての0.5 mM ルテニウム金属錯体Ru(bpy)3、電子輸送体としての3.0 mM メチルビオロゲン、触媒としての5.5 uMヒドロゲナーゼを含む100 mMトリス緩衝液(pH 8.0) 133 uLに、多孔質ガラス 10 mgを12時間以上浸漬することで、反応関連物質3を多孔質ガラス1の細孔2表面に吸着させた(図1参照)。
(比較例1)
実施例1における反応関連物質3の多孔質ガラス1への吸着時に使用した溶液と同じ溶液150 uLをゴム栓で蓋が可能なガラス容器に入れ、疑似太陽光発生装置を照射することで、光化学反応を試みた。シリンジを用いてガラス容器から気体を採取し、ガスクロマトグラフィーで発生した水素ガスを検出、定量した。その結果を図4に示す。図4の結果より、水素ガスは検出されず、光化学反応は進行していないことが確認された。
(実施例2)
光増感剤としての光合成生物から抽出したタンパク質−クロロフィル色素複合体(光捕集系タンパク質 24 uM)、電子輸送体としての3.0 mM メチルビオロゲン、触媒としての1.4 uMヒドロゲナーゼ、0.03%(w/v) n-ドデシルマルトシドを含む100 mM トリス緩衝液(pH 7.4) 133 uLに、多孔質ガラス 10 mgを12時間以上浸すことで、反応関連物質3を多孔質ガラス1の細孔2表面に吸着させた(図1参照)。
(実施例3)
光増感剤としての光合成生物から抽出したタンパク質−クロロフィル色素複合体(光化学系Iタンパク質−色素複合体)、電子輸送体としてのシトクロムc6、触媒としての白金コロイド、電子供与体としてのアスコルビン酸ナトリウムを用いての光水素発生系を示す。本実施例において、シトクロムc6(電子輸送体)は、アスコルビン酸ナトリウム(電子供与体)から、電子を受け取り、タンパク質−クロロフィル色素複合体(光増感剤)へ渡す機能を有する。
(実施例4)
実施例1における反応関連物質3をゾルゲル法で製造された粒子状の多孔質ガラスへ実施例1と同様の条件で粒子状多孔質ガラスの細孔表面に吸着させた。
(実施例5)
電子供与体としての20 mM エチレンジアミン4酢酸(EDTA)、光増感剤としての0.5 mM ルテニウム金属錯体Ru(bpy)3、電子輸送体としての3.0 mM メチレンブルー、触媒としての5.5 uMヒドロゲナーゼを含む100 mMトリス緩衝液(pH 8.0) 1.33 uLに、ゾルゲル法で製造された粒子状の多孔質ガラス 10 mgを12時間以上浸漬することで、反応関連物質3を多孔質ガラス1の細孔2表面に吸着させた(図1参照)。
(実施例6)
1.0 mg/mL 酸化チタン(粒子径約40 nm)水溶液 133 uLに多孔質ガラス 4.9 mgを12時間以上浸漬することで、電子輸送体としての酸化チタンを吸着させた。1.33 mLの蒸留水で多孔質ガラスを洗浄した後に、電子供与体としての20 mM エチレンジアミン4酢酸(EDTA)、光増感剤としての0.5 mM ルテニウム金属錯体Ru(bpy)3、触媒としての5.5 uMヒドロゲナーゼを含む100 mMトリス緩衝液(pH 8.0) 133 uLに、多孔質ガラスを12時間以上浸漬することで、反応関連物質3すべてを多孔質ガラス1の細孔2表面に吸着させた(図1参照)。
2 細孔
3 反応関連物質
Claims (3)
- 水素を生成させる光化学反応に用いられる光化学反応装置であって、
多数の細孔(2)を有し、かつ、光を透過する多孔質ガラス(1)を備え、
前記細孔(2)内部に、少なくとも光増感剤、電子輸送体および還元反応用の触媒が配置されており、
前記多孔質ガラスの平均細孔径は、20〜75nmであり、
前記光増感剤は、金属化合物であり、
前記電子輸送体は、メチルビオロゲン、メチレンブルー、酸化チタンのいずれか1つであり、
前記多孔質ガラスは、前記光化学反応の際に、大気下に置かれた状態とされることを特徴とする光化学反応装置。 - 前記光増感剤、前記電子輸送体および前記触媒を含む溶液と、前記多孔質ガラスとを用意する工程と、
前記溶液に前記多孔質ガラスを浸漬する工程とを行うことを特徴とする請求項1に記載の光化学反応装置の製造方法。 - 請求項1に記載の前記光化学反応装置を用い、
前記多孔質ガラスが大気下に置かれた状態で、前記多孔質ガラス(1)の細孔(2)内部に、原料物質を含む溶液を供給するとともに、前記多孔質ガラス(1)に前記光を照射して、水素を生成させることを特徴とする光化学反応方法。
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