JP5970638B2 - 銀ナノ粒子の製造方法 - Google Patents
銀ナノ粒子の製造方法 Download PDFInfo
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- JP5970638B2 JP5970638B2 JP2014526309A JP2014526309A JP5970638B2 JP 5970638 B2 JP5970638 B2 JP 5970638B2 JP 2014526309 A JP2014526309 A JP 2014526309A JP 2014526309 A JP2014526309 A JP 2014526309A JP 5970638 B2 JP5970638 B2 JP 5970638B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
- B22F1/0545—Dispersions or suspensions of nanosized particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
- B22F1/0551—Flake form nanoparticles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
- B22F2009/245—Reduction reaction in an Ionic Liquid [IL]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/25—Noble metals, i.e. Ag Au, Ir, Os, Pd, Pt, Rh, Ru
- B22F2301/255—Silver or gold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Description
第1の工程では、出発溶液として、晶癖制御剤を含む銀イオン水溶液を調整する。具体的には、水(好ましくは純水、より好ましくは超純水)をよく攪拌しながら、これに銀塩と晶癖制御剤を加えることよって晶癖制御剤を含む銀イオン水溶液を調整する。
続く第2の工程では、上述した手順で調整した出発溶液をよく攪拌しながら、これに還元剤を添加する。添加された還元剤により、出発溶液中の銀イオンが還元され、非常に微小な銀の結晶が形成される。本実施形態における還元剤は、銀イオンを金属銀に還元することができる化合物であればよく、銀の酸化還元電位(+0.799)に見合った適切な還元剤を用いることができる。本実施形態で用いる還元剤の好適な例としては、水素化ホウ素金属塩を挙げることでき、さらにその好適な例としては、テトラヒドロホウ酸ナトリウム(NaBH4)を挙げることができる。なお、還元剤は、氷温で適切な濃度に調整した水溶液の形で晶癖制御剤を含む銀イオン水溶液に添加することが好ましい。
続く第3の工程では、上述した手順で得られた微小な銀結晶を含む水分散液をよく攪拌しながら、これに酸化剤を添加する。本実施形態における酸化剤は、金属銀を酸化して再イオン化することができる化合物であればよく、銀の酸化還元電位(+0.799)に見合った適切な酸化剤を用いることができる。本実施形態で用いる酸化剤の好適な例としては、過酸化水素(H2O2)を挙げることができる。なお、酸化剤は、適切な濃度に調整した水溶液の形で微小な銀結晶を含む水分散液に添加することが好ましい。
以下の手順で銀ナノ粒子を作製した。なお、使用した全ての試薬は、和光純薬工業社製の特級グレードのものである。
分光光度計(V-570UV/Vis/NIR,日本分光社製)を用いて、上述した手順で作製したサンプル1〜4の吸収スペクトルを測定した。なお、測定において、セル長を2mmとし、超純水をリファレンスとして、サンプルを希釈せずに測定を行った。図3は、サンプル1〜4の吸収スペクトル測定結果をまとめて示す。
12…晶癖制御剤
20…銀ナノ粒子
Claims (5)
- 出発溶液として銀結晶の(111)面に選択的に吸着する晶癖制御剤を含む銀イオン水溶液を調整する第1の工程と、
前記出発溶液を攪拌しながら還元剤を添加して銀結晶の水分散液を得る第2の工程と、
前記水分散液を攪拌しながら酸化剤を添加して銀結晶を再イオン化する第3の工程と、
を含み、
前記第3の工程における前記酸化剤の添加によって、前記水分散液中における金属銀の溶解度を銀結晶のオスワルド熟成が進行するように適時最適化することを特徴とする、
銀ナノ粒子の製造方法。 - 前記晶癖制御剤は、クエン酸またはその塩を含む、請求項1に記載の製造方法。
- 前記還元剤は、テトラヒドロホウ酸ナトリウムである、請求項1または2に記載の製造方法。
- 前記酸化剤は、過酸化水素である、請求項1〜3のいずれか一項に記載の製造方法。
- 前記第3の工程において、前記水分散液中にプレート状の銀ナノ粒子を選択的に残存させる、請求項1〜4のいずれか一項に記載の製造方法。
Applications Claiming Priority (1)
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---|---|---|---|
PCT/JP2014/000316 WO2015111095A1 (ja) | 2014-01-23 | 2014-01-23 | 銀ナノ粒子の製造方法 |
Publications (2)
Publication Number | Publication Date |
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JP5970638B2 true JP5970638B2 (ja) | 2016-08-17 |
JPWO2015111095A1 JPWO2015111095A1 (ja) | 2017-03-23 |
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JP2014526309A Active JP5970638B2 (ja) | 2014-01-23 | 2014-01-23 | 銀ナノ粒子の製造方法 |
Country Status (3)
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US (1) | US20170021426A1 (ja) |
JP (1) | JP5970638B2 (ja) |
WO (1) | WO2015111095A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2017156104A (ja) * | 2016-02-29 | 2017-09-07 | 西松建設株式会社 | 光増強素子とその製造方法ならびに分光分析用キットおよび分光分析方法 |
JPWO2019065316A1 (ja) | 2017-09-29 | 2020-09-10 | 日本ペイントホールディングス株式会社 | 塗料組成物及び塗膜 |
CN112091233B (zh) * | 2020-11-19 | 2021-02-19 | 西安宏星电子浆料科技股份有限公司 | 一种银纳米粒子的合成方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009269935A (ja) * | 2008-04-30 | 2009-11-19 | Sumitomo Metal Mining Co Ltd | 金色系金属光沢を有する銀膜 |
JP2012036481A (ja) * | 2010-08-11 | 2012-02-23 | Mitsui Mining & Smelting Co Ltd | 扁平銀粒子及びその製造方法 |
WO2012067706A1 (en) * | 2010-11-17 | 2012-05-24 | E. I. Du Pont De Nemours And Company | Reactor and continuous process for producing silver powders |
WO2013146447A1 (ja) * | 2012-03-27 | 2013-10-03 | 富士フイルム株式会社 | 銀粒子含有膜およびその製造方法、ならびに、熱線遮蔽材 |
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2014
- 2014-01-23 JP JP2014526309A patent/JP5970638B2/ja active Active
- 2014-01-23 WO PCT/JP2014/000316 patent/WO2015111095A1/ja active Application Filing
- 2014-01-23 US US15/111,998 patent/US20170021426A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009269935A (ja) * | 2008-04-30 | 2009-11-19 | Sumitomo Metal Mining Co Ltd | 金色系金属光沢を有する銀膜 |
JP2012036481A (ja) * | 2010-08-11 | 2012-02-23 | Mitsui Mining & Smelting Co Ltd | 扁平銀粒子及びその製造方法 |
WO2012067706A1 (en) * | 2010-11-17 | 2012-05-24 | E. I. Du Pont De Nemours And Company | Reactor and continuous process for producing silver powders |
WO2013146447A1 (ja) * | 2012-03-27 | 2013-10-03 | 富士フイルム株式会社 | 銀粒子含有膜およびその製造方法、ならびに、熱線遮蔽材 |
Also Published As
Publication number | Publication date |
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WO2015111095A1 (ja) | 2015-07-30 |
JPWO2015111095A1 (ja) | 2017-03-23 |
US20170021426A1 (en) | 2017-01-26 |
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