JP6092435B2 - 水系分散液とそれを用いた塗料、および光触媒膜の製造方法 - Google Patents
水系分散液とそれを用いた塗料、および光触媒膜の製造方法 Download PDFInfo
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- JP6092435B2 JP6092435B2 JP2016007881A JP2016007881A JP6092435B2 JP 6092435 B2 JP6092435 B2 JP 6092435B2 JP 2016007881 A JP2016007881 A JP 2016007881A JP 2016007881 A JP2016007881 A JP 2016007881A JP 6092435 B2 JP6092435 B2 JP 6092435B2
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- fine particles
- aqueous dispersion
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Images
Classifications
-
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Description
まず、原料粉末として平均粒径が0.5μmの三酸化タングステン粉末を用意した。この原料粉末をキャリアガス(Ar)と共にRFプラズマに噴霧し、さらに反応ガスとしてアルゴンを40L/min、酸素を40L/minの流量で流した。このようにして、原料粉末を昇華させながら酸化反応させる昇華工程を経て、酸化タングステン粉末を作製した。酸化タングステン粉末は大気中にて900℃×1.5hの条件で熱処理した。酸化タングステン粉末はその濃度が10質量%となるように水中に分散させた。このようにして、酸化タングステン微粒子を含む第1の分散液を調製した。
実施例1と同様の方法で作製した酸化タングステン粉末を用いて、実施例1と同様にして第1の分散液を作製した。酸化タングステン粉末の平均一次粒径(D50粒径)を実施例1と同様にして測定したところ、平均一次粒径は25nmであった。酸化タングステン粉末をその濃度が10質量%となるように水中に分散させた後、塩化ルテニウム水溶液を酸化タングステンに対してルテニウムの割合が0.02質量%となるように混合した。この混合液にアンモニアを滴下しながらpHを6に調整した。
実施例1と同様の方法で作製した酸化タングステン粉末を用いて、実施例1と同様にして第1の分散液を作製した。酸化タングステン粉末の平均一次粒径(D50粒径)を実施例1と同様にして測定したところ、平均一次粒径は25nmであった。酸化タングステン粉末をその濃度が10質量%となるように水中に分散させた後、Pt粒子を酸化タングステンに対して白金の割合が2質量%となるように混合した。
比較例1の水系分散液として、実施例1で酸化タングステン粉末のみを分散させた水系分散液を用意した。
Claims (17)
- 酸化タングステン微粒子と酸化ジルコニウム微粒子とを含み、波長が380nm以上830nm以下の可視光の照射下で光触媒性能を示す可視光応答型の光触媒複合微粒子と、前記光触媒複合微粒子が分散された水系分散媒とを具備する水系分散液であって、
前記光触媒複合微粒子における前記酸化タングステン微粒子の質量に対する前記酸化ジルコニウム微粒子の質量の割合が10%以上200%以下の範囲であり、
前記光触媒複合微粒子の粒度分布におけるD50粒径が20nm以上10μm以下の範囲であり、
前記酸化ジルコニウム微粒子は、結晶構造を有する棒状の一次粒子を有し、前記酸化タングステン微粒子は2.7nm以上75nm以下の範囲の平均一次粒径を有し、前記酸化ジルコニウム微粒子の前記棒状の一次粒子の平均長径の前記酸化タングステン微粒子の平均一次粒径に対する比が0.05以上20以下の範囲であり、
前記水系分散液のpHが2.5以上7.5以下の範囲であることを特徴とする水系分散液。 - 前記酸化ジルコニウム微粒子は単斜晶系の結晶構造を有する、請求項1に記載の水系分散液。
- 前記酸化タングステン微粒子の質量に対する前記酸化ジルコニウム微粒子の質量の割合が10%以上150%以下の範囲である、請求項1または請求項2に記載の水系分散液。
- 前記光触媒複合微粒子は、前記水系分散媒中に0.001質量%以上50質量%以下の範囲で分散されている、請求項1ないし請求項3のいずれか1項に記載の水系分散液。
- 前記光触媒複合微粒子は、タングステンおよびジルコニウム以外の金属元素を、前記酸化タングステンに対して0.001質量%以上50質量%以下の範囲で含む、請求項1ないし請求項4のいずれか1項に記載の水系分散液。
- 前記金属元素は、タングステンおよびジルコニウム以外の遷移金属元素であり、
前記光触媒複合微粒子は、前記金属元素を前記酸化タングステンに対して0.005質量%以上2質量%以下の範囲で含む、請求項5に記載の水系分散液。 - 前記金属元素は、ニッケル、チタン、マンガン、鉄、パラジウム、白金、ルテニウム、銅、銀、アルミニウム、およびセリウムから選ばれる少なくとも1種であり、
前記光触媒複合微粒子は、前記金属元素を前記酸化タングステンに対して0.005質量%以上2質量%以下の範囲で含む、請求項5に記載の水系分散液。 - 前記金属元素は、前記金属元素の単体、前記金属元素の化合物、および前記金属元素とタングステンまたはジルコニウムとの複合化合物から選ばれる少なくとも1つの形態で、前記光触媒複合微粒子に含まれる、請求項5ないし請求項7のいずれか1項に記載の水系分散液。
- 酸化タングステン微粒子と酸化ジルコニウム微粒子とを含み、波長が380nm以上830nm以下の可視光の照射下で光触媒性能を示す可視光応答型の光触媒複合微粒子と、前記光触媒複合微粒子が分散された水系分散媒とを具備する水系分散液であって、
前記光触媒複合微粒子におけるタングステンの原子数に対するジルコニウムの原子数の割合が10%以上400%以下の範囲であり、
前記光触媒複合微粒子の粒度分布におけるD50粒径が20nm以上10μm以下の範囲であり、
前記酸化ジルコニウム微粒子は、結晶構造を有する棒状の一次粒子を有し、前記酸化タングステン微粒子は2.7nm以上75nm以下の範囲の平均一次粒径を有し、前記酸化ジルコニウム微粒子の前記棒状の一次粒子の平均長径の前記酸化タングステン微粒子の平均一次粒径に対する比が0.05以上20以下の範囲であり、
前記水系分散液のpHが2.5以上7.5以下の範囲であることを特徴とする水系分散液。 - 前記酸化ジルコニウム微粒子は単斜晶系の結晶構造を有する、請求項9に記載の水系分散液。
- 前記光触媒複合微粒子は、前記水系分散媒中に0.001質量%以上50質量%以下の範囲で分散されている、請求項9に記載の水系分散液。
- 前記光触媒複合微粒子は、タングステンおよびジルコニウム以外の金属元素を、前記酸化タングステンに対して0.001質量%以上50質量%以下の範囲で含む、請求項9ないし請求項11のいずれか1項に記載の水系分散液。
- 前記金属元素は、タングステンおよびジルコニウム以外の遷移金属元素であり、
前記光触媒複合微粒子は、前記金属元素を前記酸化タングステンに対して0.005質量%以上2質量%以下の範囲で含む、請求項12に記載の水系分散液。 - 前記金属元素は、ニッケル、チタン、マンガン、鉄、パラジウム、白金、ルテニウム、銅、銀、アルミニウム、およびセリウムから選ばれる少なくとも1種であり、
前記光触媒複合微粒子は、前記金属元素を前記酸化タングステンに対して0.005質量%以上2質量%以下の範囲で含む、請求項12に記載の水系分散液。 - 請求項1ないし請求項14のいずれか1項に記載の水系分散液と、無機バインダおよび有機バインダから選ばれる少なくとも1種のバインダ成分とを具備することを特徴とする塗料。
- 請求項1ないし請求項14のいずれか1項に記載の水系分散液を基材に塗布して光触媒膜を形成する工程を具備することを特徴とする光触媒膜の製造方法。
- 請求項15に記載の塗料を基材に塗布して光触媒膜を形成する工程を具備することを特徴とする光触媒膜の製造方法。
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JP6989421B2 (ja) * | 2018-03-13 | 2022-01-05 | 株式会社東芝 | 光触媒分散液、光触媒複合材料および光触媒装置 |
JP7115900B2 (ja) * | 2018-04-26 | 2022-08-09 | シャープ株式会社 | 光触媒層、光触媒体、及び光触媒体の製造方法 |
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JP7328165B2 (ja) * | 2020-03-11 | 2023-08-16 | シャープ株式会社 | 光触媒分散液、光触媒被覆部材、光触媒フィルタ及び光触媒層の形成方法 |
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JP2009106897A (ja) * | 2007-10-31 | 2009-05-21 | Toshiba Lighting & Technology Corp | 光触媒粒子及び光触媒塗料 |
JP5546768B2 (ja) | 2008-01-28 | 2014-07-09 | 株式会社東芝 | 可視光応答型光触媒粉末とそれを用いた可視光応答型の光触媒材料、光触媒塗料、光触媒製品 |
JP5641926B2 (ja) | 2008-03-04 | 2014-12-17 | 株式会社東芝 | 水系分散液とそれを用いた塗料 |
JP5512934B2 (ja) | 2008-05-09 | 2014-06-04 | 住友化学株式会社 | 非晶質のZr−O系粒子を分散質とするゾル、その製造方法、このゾルをバインダーとする光触媒体コーティング液、およびその光触媒体コーティング液を塗布した光触媒機能製品の製造方法 |
JP5313051B2 (ja) * | 2008-06-09 | 2013-10-09 | 住友化学株式会社 | 蓚酸ジルコニウムゾル |
US8298979B2 (en) | 2008-06-09 | 2012-10-30 | Daiichi Kigenso Kagaku Kogyo Co., Ltd. | Zirconium oxalate sol |
JP2010120805A (ja) * | 2008-11-19 | 2010-06-03 | Sumitomo Chemical Co Ltd | 光触媒体分散液 |
EP2599545B1 (en) | 2010-07-29 | 2019-09-04 | Toto Ltd. | Photocatalyst coated body and photocatalyst coating liquid |
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CN103796755A (zh) | 2014-05-14 |
KR101622055B1 (ko) | 2016-05-17 |
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CN106238036B (zh) | 2019-11-12 |
US10335771B2 (en) | 2019-07-02 |
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