JP7273337B2 - 合金ナノ粒子を担持した網目状構造体の製造方法 - Google Patents
合金ナノ粒子を担持した網目状構造体の製造方法 Download PDFInfo
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Description
本発明に係る別の合金ナノ粒子を担持した網目状構造体の製造方法は、鉄と銅の金属イオンを溶解させた溶液にタンパク質鋳型を加えてタンパク質鋳型内に前記金属イオンを導入する工程と、前記タンパク質鋳型と前記タンパク質鋳型に取り込まれなかった金属イオンを分離する工程と、分離する工程の後に、前記タンパク質鋳型に取り込まれた前記金属イオンを還元し、合金ナノ粒子を内包するタンパク質鋳型を得る工程と、前記合金ナノ粒子を内包するタンパク質鋳型の分散液と網目状構造体の前駆体であるゾルまたはゲルとを混合する工程と、前記ゾルまたはゲルを凍結させる工程と、凍結させた前記ゾルまたはゲルを真空中で乾燥させる工程と、乾燥させた前記ゾルまたはゲルを熱処理して前記タンパク質鋳型を除去する工程と、を有することを特徴とする。
図1Aおよび図1Bを参照し、合金ナノ粒子内包タンパク質の製造方法について説明する。
図3を参照し、合金ナノ粒子を担持した網目状構造体の製造方法について説明する。
図4を参照し、合金ナノ粒子を担持した網目状構造体の別の製造方法について説明する。
図5を参照し、合金ナノ粒子を担持した網目状構造体のさらに別の製造方法について説明する。
次に、鉄と銅の合金ナノ粒子を内包したタンパク質の作製例について説明する。ここでは、鋳型となるタンパク質に市販アポフェリチン溶液(東京化成工業製)を用い、金属イオンとして鉄イオンと銅イオンを用いて、図1Aの製造方法により合金ナノ粒子内包タンパク質を作製した例を示す。アポフェリチンを他の材料によるタンパク質鋳型に変えることで、目的の合金ナノ粒子の粒径を調製することができる。
次に、上記の合金ナノ粒子内包タンパク質の実施例で作製した合金ナノ粒子内包タンパク質を用いて、製造方法1-3により合金ナノ粒子を担持した網目状構造体を作製した実施例1-5について説明する。
実施例1は、製造方法1の実施例である。ここでは、代表として、グラフェンをナノシートとして使用した実施例を示す。グラフェンを他の材料によるナノシートに変えることで、網目状構造体を調製することができる。
比較例1は、実施例1の凍結工程及び乾燥工程を行わずに、通常乾燥でカーボン材を作製した比較例である。
実施例2は、製造方法1の実施例であり、ゾルまたはゲルを水熱合成により生産した実施例である。ここでは、代表として、酸化チタンを用いた例を示す。網目状構造体を他の材料によるナノファイバーに変えることで、三次元ネットワーク構造を有する共連続体を調製することができる。
実施例3は、製造方法1の実施例であり、ゾルまたはゲルをゾルゲル法(金属アルコキシドの加水分解)により生産した実施例である。ここでは、代表として、酸化チタンを用いた例を示す。網目状構造体を他の材料によるナノファイバーに変えることで、三次元ネットワーク構造を有する共連続体を調製することができる。
実施例4は、製造方法2の実施例である。ここでは、代表として、酢酸菌であるアセトバクター・キシリナム(Acetobacter xylinum)が産生したセルロースゲルによるナノファイバーから網目状構造体を作製した場合について示す。用いるバクテリアを任意のバクテリアに変えることで、酸化鉄や酸化マンガンによるナノファイバーから成る網目状構造体を調製することができる。
実施例5は、製造方法3の実施例である。ここでは、ゾルまたはゲルとしてバクテリア産生ゲルを用いる。
比較例2は、ナノ粒子担持にタンパク質を用いず、塩化鉄でナノ粒子を担持した比較例である。
102…合金ナノ粒子の前駆体
Claims (4)
- 鉄と銅の金属イオンを溶解させた溶液にタンパク質鋳型を加えてタンパク質鋳型内に前記金属イオンを導入する工程と、
前記タンパク質鋳型と前記タンパク質鋳型に取り込まれなかった金属イオンを分離する工程と、
分離する工程の後に、前記タンパク質鋳型に取り込まれた前記金属イオンを還元し、合金ナノ粒子を内包するタンパク質鋳型を得る工程と、
網目状構造体の前駆体であるゾルまたはゲルを凍結させる工程と、
凍結させた前記ゾルまたはゲルを真空中で乾燥させて網目状構造体を得る工程と、
前記合金ナノ粒子を内包するタンパク質鋳型を前記網目状構造体に担持する工程と、
前記網目状構造体を熱処理して前記タンパク質鋳型を除去する工程と、を有する
ことを特徴とする合金ナノ粒子を担持した網目状構造体の製造方法。 - 鉄と銅の金属イオンを溶解させた溶液にタンパク質鋳型を加えてタンパク質鋳型内に前記金属イオンを導入する工程と、
前記タンパク質鋳型と前記タンパク質鋳型に取り込まれなかった金属イオンを分離する工程と、
分離する工程の後に、前記タンパク質鋳型に取り込まれた前記金属イオンを還元し、合金ナノ粒子を内包するタンパク質鋳型を得る工程と、
前記合金ナノ粒子を内包するタンパク質鋳型の分散液と網目状構造体の前駆体であるゾルまたはゲルとを混合する工程と、
前記ゾルまたはゲルを凍結させる工程と、
凍結させた前記ゾルまたはゲルを真空中で乾燥させる工程と、
乾燥させた前記ゾルまたはゲルを熱処理して前記タンパク質鋳型を除去する工程と、を有する
ことを特徴とする合金ナノ粒子を担持した網目状構造体の製造方法。 - 請求項1または2に記載の合金ナノ粒子を担持した網目状構造体の製造方法であって、
バクテリアにより前記ゾルまたはゲルを生産する工程を有する
ことを特徴とする合金ナノ粒子を担持した網目状構造体の製造方法。 - 請求項1ないし3のいずれかに記載の合金ナノ粒子を担持した網目状構造体の製造方法であって、
前記タンパク質鋳型は、フェリチンタンパク質、熱衝撃タンパク質、DpsAタンパク質、カプシドタンパク質、もしくは、これらのアミノ酸配列を改変した改変物のいずれかから構成されている
ことを特徴とする合金ナノ粒子を担持した網目状構造体の製造方法。
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WO2004110930A1 (ja) | 2003-06-12 | 2004-12-23 | Matsushita Electric Industrial Co., Ltd. | ナノ粒子含有複合多孔体およびその製造方法 |
JP2012507120A (ja) | 2008-10-24 | 2012-03-22 | ナノシス・インク. | 燃料電池用電気化学的触媒 |
CN109097978A (zh) | 2018-08-03 | 2018-12-28 | 武汉纺织大学 | 表面负载纳米金属颗粒的导电纳米纤维多孔膜材料及其制备方法 |
WO2019026404A1 (ja) | 2017-08-04 | 2019-02-07 | 日本電信電話株式会社 | セルロースナノファイバーカーボンとその製造方法 |
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JP2012507120A (ja) | 2008-10-24 | 2012-03-22 | ナノシス・インク. | 燃料電池用電気化学的触媒 |
WO2019026404A1 (ja) | 2017-08-04 | 2019-02-07 | 日本電信電話株式会社 | セルロースナノファイバーカーボンとその製造方法 |
CN109097978A (zh) | 2018-08-03 | 2018-12-28 | 武汉纺织大学 | 表面负载纳米金属颗粒的导电纳米纤维多孔膜材料及其制备方法 |
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