CN1954908A - Optical catalyst capable of magnetic separated and its preparation method - Google Patents
Optical catalyst capable of magnetic separated and its preparation method Download PDFInfo
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- CN1954908A CN1954908A CN 200510114653 CN200510114653A CN1954908A CN 1954908 A CN1954908 A CN 1954908A CN 200510114653 CN200510114653 CN 200510114653 CN 200510114653 A CN200510114653 A CN 200510114653A CN 1954908 A CN1954908 A CN 1954908A
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Abstract
A photocatalyst able to be magnetically separated is prepared from ferromagnetic high-molecular microballs as magnetic carrier and the semiconductor nanoparticles with high photocatalytic activity through sol-gel method for carrying said nanoparticles by said microballs.
Description
Technical field
Technical field under the present invention is a photochemical catalyst, particularly belongs to photochemical catalyst capable of magnetic separating and preparation method thereof.
Background technology
As everyone knows, along with industrial expansion, problem of environmental pollution is very serious, and the contaminated solution problem is important content and the task when previous scientific research.
The conductor photocatalysis technology is that the semi-conducting material that utilizes ultraviolet light irradiation to have photocatalytic activity causes light-catalyzed reaction.TiO
2Catalysis material is a kind of conductor photocatalysis material that is subjected to extensive concern in recent years.Studies show that in a large number dyestuff, surfactant, organohalogen compounds, agricultural chemicals, oils, cyanide etc. can both be by TiO
2Finish photocatalytic degradation effectively, decolouring, detoxification, mineralising are the inorganic molecules material, thereby eliminate the pollution to environment.In addition, TiO
2That light-catalyzed reaction also has is nontoxic, catalytic activity is high, oxidability is strong, good stability, reaction condition gentleness, use that equipment needed thereby is simple, secondary pollution is little, easy operating, to low concentration pollutant and vapor phase contaminants also have good effect of removing, catalysis material to be easy to get, operating cost is low, to be expected with sunshine be to react advantage such as light source.Thereby, TiO
2Catalysis material is a kind of very promising material of curbing environmental pollution, and passes through TiO
2The work that the preparation of catalysis material and modification further improve its photocatalytic activity also just becomes the emphasis that people study.
But the semi-conductor nano particles dispersion that extensively adopts exists a very big problem to be badly in need of solving at present: how nano particle is separated from reacted solution and repeated application.Because semiconductor nano photocatalyst particles very little (being generally a few to tens of nanometers), use separation technology such as centrifugation or hyperfiltration will greatly increase equipment investment and running expense, some researchers adopt the semiconductor nano photochemical catalyst are loaded on method on the glass sheet surface, this type of document has " physical chemistry magazine ", 1995,99, " surfactant is at TiO for the article of delivering on the 8244-8248
2Optical Electro-Chemistry on the/TCO membrane electrode is decomposed " (H.Hidaja, Y.Asai, J.Zhao, K.Nohara, E.Pelizzetti, N.Serpone, Photoelectrochemical Decomposition of Aurfactants on a TiO
2/ TCOParticulate Film Electrode Assembly, J.Phys.Chem..) or the semiconductor nano photochemical catalyst is loaded on the method on glass fabric surface, this type of document has " water and air cleaning and processing ", 1993, the article that pp783-788 delivers above " chloroform is at the photocatalytic degradation that scribbles titanium dioxide glass fabric surface " (M.Murabaysshi, K.Itoh, K.Kawashima, R.Masuda, S.Suzuki, Photocatalytic degradation of chloroform with TiO
2Coated glass fiber cloth ， Yang hotocatalyticPurification and Treatment of water and air Ed.F.F.Ollis and H.Al-Ekabi; Elsevier).Though these methods have been avoided the separation difficult problem of Nano semiconductor photochemical catalyst, also greatly reduce effective contact area on reactant and semiconductor nano photocatalyst granular surface, influenced the efficient of light-catalyzed reaction.
Using magnetic separation technique is a kind of method that can effectively separate photochemical catalyst, as Chinese patent " photochemical catalyst capable of magnetic separating and method for making thereof (patent No. 98101176.4) " and Chinese patent " photochemical catalyst capable of magnetic separating of multilayer coating and method for making thereof (patent No. 98101790.8) ", all related to the method for Magnetic Isolation.But existing technology all is to fix photochemical catalyst at magnetic inorganic particle surface or the inorganic magnetic particle surface that coated oxide by load and high-temperature roasting, metal oxide can make photochemical catalyst pollute on the one hand, metal oxide is very easily dissolved and destroy catalyst structure in acid solution on the other hand, and therefore bigger limitation is in use arranged.
Summary of the invention
The objective of the invention is to overcome the shortcoming of magnetic separated light catalyst in the past, a kind of novel photochemical catalyst is provided, it is core with the magnetic polymer material, the outer conductor photocatalysis material that coats, make it can be effectively and liquid phase separation, performance safety and stability, do not bring new pollution, need not roasting process, and kept the photocatalysis performance of semiconductor nano photochemical catalyst.
Photochemical catalyst capable of magnetic separating of the present invention and preparation method thereof.Photochemical catalyst is made up of magnetic carrier and semi-conductor nano particles.Wherein magnetic carrier is the polymer microsphere with superparamagnetism, and semiconductor particle is the semiconductor substance with photocatalytic activity.The present invention utilizes sol-gal process that solids are loaded on the magnetic macromolecular microsphere, make the semiconductor nano photochemical catalyst from reacted solution, to separate effectively and to use repeatedly, solved present light-catalyzed reaction system nano-photocatalyst and separated difficult problem by externally-applied magnetic field.
The objective of the invention is to realize by the following technical solutions:
The invention provides a kind of on magnetic macromolecular microsphere the method for cladding titanium dioxide and titania based catalysis material.Detailed process may further comprise the steps:
(1) magnetic macromolecular microsphere is disperseed in organic solution.
(2) add the titanium source, add hydrolysis inhibitor, vigorous stirring.
(3) drip deionized water, continue vigorous stirring 2h.
(4) add excessive deionized water, be heated to high temperature, under this temperature, stir for a long time.
(5) repeatedly washing after the cooling, middle hyperthermia drying can make required sample.
Magnetic macromolecular microsphere described in the above-mentioned steps (1) is that kernel is the magnetic-particle with superparamagnetism, and shell is the microballoon of macromolecular material.Wherein the grain diameter of magnetic carrier is 1um～800um, and microspherulite diameter is 5um～1000um; Wherein the magnetisable material in the kernel has the magnetisable material of superparamagnetism (tri-iron tetroxide, iron oxide etc.) for one or more; Macromolecule in the wherein said shell is macromolecule that is polymerized by hydrophobic monomer or the macromolecule that is formed by hydrophobic monomer and hydrophilic monomer copolymerization.
Organic solution described in the above-mentioned steps (1) comprises high molecular bad organic solvent in the various magnetic macromolecular microsphere shells such as methyl alcohol, ethanol.
Titanium source described in the above-mentioned steps (2) comprises butyl titanate, titanium tetrachloride, titanyl sulfate, TiOCl
2Deng.
Hydrolysis inhibitor described in the above-mentioned steps (2) comprises nitric acid, hydrochloric acid, acetic acid, isopropyl acetone etc.
High temperature described in the above-mentioned steps (4) is meant 90 ℃～100 ℃.
Middle high temperature described in the above-mentioned steps (5) is meant 60 ℃～100 ℃.
A kind of photochemical catalyst capable of magnetic separating provided by the invention and preparation method thereof, this novel catalysis material is for having coated the layer of semiconductor particle on a kind of magnetic macromolecular microsphere surface, thereby photochemical catalyst can effectively be separated by magnetic, effectively eliminated the interference of magnetic material, and made the stable more and safety of novel photocatalysis material character titania-based material photocatalysis performance.Do not have high-temperature calcination process in this preparation process, effectively protected the structure and the performance of polymer microsphere, prepared the titanium deoxid film of Detitanium-ore-type at low temperatures.
The specific embodiment
Change the titanium source
Embodiment 1,1g magnetic polyethylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL butyl titanate, add the 5mL red fuming nitric acid (RFNA), vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Embodiment 2,1g magnetic polyethylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL titanium tetrachloride, add the 5mL red fuming nitric acid (RFNA), vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Embodiment 3,1g magnetic polyethylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15g titanyl sulfate, add the 5mL red fuming nitric acid (RFNA), vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.Change hydrolysis inhibitor
Embodiment 4,1g magnetic polyethylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add 15mL TiOCl
2Solution adds the 5mL red fuming nitric acid (RFNA), and vigorous stirring drips the 20mL deionized water, continues vigorous stirring 2h, adds the 200mL deionized water, and be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Embodiment 5,1g magnetic polyethylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL butyl titanate, add the 5mL concentrated hydrochloric acid, vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Embodiment 6,1g magnetic polyethylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL butyl titanate, add 5mL acetic acid, vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Embodiment 7,1g magnetic polyethylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL butyl titanate, add the 5mL isopropyl acetone, vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.Change the reaction system solvent
Embodiment 8,1g magnetic polyethylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in methyl alcohol, add the 15mL butyl titanate, add the 5mL concentrated hydrochloric acid, vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Embodiment 9,1g magnetic polyethylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL butyl titanate, add the 5mL concentrated hydrochloric acid, vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.Change polymer microsphere matrix
Embodiment 10,1g magnetic PVC macromolecular microballoon (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL butyl titanate, add the 5mL concentrated hydrochloric acid, vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Embodiment 11,1g magnetic polystyrene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL butyl titanate, add the 5mL concentrated hydrochloric acid, vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Embodiment 12,1g magnetic polytetrafluoroethylene (PTFE) polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL butyl titanate, add the 5mL concentrated hydrochloric acid, vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Embodiment 13,1g magnetic polypropylene polymer microsphere (kernel is a tri-iron tetroxide) is disperseed in alcohol, add the 15mL butyl titanate, add the 5mL concentrated hydrochloric acid, vigorous stirring drips the 20mL deionized water, continue vigorous stirring 2h, add the 200mL deionized water, be heated to 90 ℃～100 ℃ and stir 48h, repeatedly washing after the cooling, 60-100 ℃ of oven dry can make required sample.
Claims (8)
1, a kind of photochemical catalyst capable of magnetic separating and preparation method thereof, its step is as follows:
(1) magnetic macromolecular microsphere is disperseed in organic solution,
(2) add the titanium source, add hydrolysis inhibitor and other auxiliary agents, vigorous stirring,
(3) drip deionized water, continue vigorous stirring 2h,
(4) add excessive deionized water, be heated to high temperature, under this temperature, stir for a long time,
(5) repeatedly washing after the cooling, middle hyperthermia drying can make required sample.
2, the magnetic macromolecular microsphere described in claim 1, it is characterized in that magnetic macromolecular microsphere described in the step (1) is that kernel is a magnetisable material, shell is high molecular microballoon, and wherein between the 800um, the particle diameter of microballoon is at 5um～1000um at 1um for the particle diameter of magnetic carrier; Wherein the magnetisable material in the kernel has the magnetisable material of superparamagnetism (tri-iron tetroxide, iron oxide etc.) for one or more; Macromolecule in the wherein said shell is macromolecule that is polymerized by hydrophobic monomer or the macromolecule that is formed by hydrophobic monomer and hydrophilic monomer copolymerization.
3, the organic solution described in claim 1 is characterized in that the described organic solution of step (1) comprises high molecular bad organic solvent in the various magnetic macromolecular microsphere shells such as methyl alcohol, ethanol.
4, the auxiliary agent of other described in claim 1 is characterized in that described other auxiliary agents of step (2) comprise metal ion solution etc.
5, the titanium source described in claim 1 is characterized in that the titanium source described in the step (2) comprises butyl titanate, titanium tetrachloride, titanyl sulfate etc.
6, the hydrolysis inhibitor described in claim 1 is characterized in that the hydrolysis inhibitor described in (2) comprises nitric acid, hydrochloric acid, acetic acid, isopropyl acetone etc.
7, the high temperature described in claim 1 is characterized in that the high temperature described in the step (4), is meant 80 ℃～100 ℃.
8, the middle high temperature described in claim 1 is characterized in that the middle high temperature described in the above-mentioned steps (5), is meant 50 ℃～100 ℃.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103525805A (en) * | 2013-11-05 | 2014-01-22 | 吉林大学 | Renewable magnetic immobilized enzyme carrier and preparation method thereof |
| CN105944664A (en) * | 2016-05-25 | 2016-09-21 | 徐靖才 | Preparation method of magnetically separable NiFe2O4/ SBA-15 composite material |
| CN108273559A (en) * | 2018-01-11 | 2018-07-13 | 宁德师范学院 | A kind of support type Fe2O3Composite photo-catalyst |
| CN109351301A (en) * | 2018-11-13 | 2019-02-19 | 中国化学赛鼎宁波工程有限公司 | A kind of production system and its production method of nano biomedical material |
| CN113649068A (en) * | 2021-07-26 | 2021-11-16 | 电子科技大学 | Magnetic polyaryl ether nitrile composite photocatalyst and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2909531B2 (en) * | 1995-08-30 | 1999-06-23 | 工業技術院長 | Method for synthesizing photocatalyst particles |
| CN1101730C (en) * | 1998-04-10 | 2003-02-19 | 中国科学院感光化学研究所 | Photocatalyst capable of magnetic separating and preparation therefor |
| CN1103637C (en) * | 1998-05-08 | 2003-03-26 | 中国科学院感光化学研究所 | Magnet-separative photocatalyst with multi-layer dressing and manufacture thereof |
| CN1416956A (en) * | 2001-11-01 | 2003-05-14 | 中国科学院广州能源研究所 | Megnetic nano composite photocatalyst and its prepn and use |
| CN100372599C (en) * | 2004-02-19 | 2008-03-05 | 上海交通大学 | Preparation method of nucleous-shell type nanometer composite particle of magnetic micro particle and quantum point |
| CN1562464A (en) * | 2004-03-31 | 2005-01-12 | 深圳清华大学研究院 | Magnetic nano T102 composite photocatalysis and preparation method |
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2005
- 2005-10-25 CN CNB2005101146533A patent/CN100486690C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103525805A (en) * | 2013-11-05 | 2014-01-22 | 吉林大学 | Renewable magnetic immobilized enzyme carrier and preparation method thereof |
| CN105944664A (en) * | 2016-05-25 | 2016-09-21 | 徐靖才 | Preparation method of magnetically separable NiFe2O4/ SBA-15 composite material |
| CN108273559A (en) * | 2018-01-11 | 2018-07-13 | 宁德师范学院 | A kind of support type Fe2O3Composite photo-catalyst |
| CN108273559B (en) * | 2018-01-11 | 2020-09-15 | 宁德师范学院 | Load type Fe2O3Composite photocatalyst |
| CN109351301A (en) * | 2018-11-13 | 2019-02-19 | 中国化学赛鼎宁波工程有限公司 | A kind of production system and its production method of nano biomedical material |
| CN113649068A (en) * | 2021-07-26 | 2021-11-16 | 电子科技大学 | Magnetic polyaryl ether nitrile composite photocatalyst and preparation method thereof |
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| CN100486690C (en) | 2009-05-13 |
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