CN1112238C - Composite nanometer titanium dioxide/iron powder catalyst and its preparation - Google Patents
Composite nanometer titanium dioxide/iron powder catalyst and its preparation Download PDFInfo
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- CN1112238C CN1112238C CN 00125300 CN00125300A CN1112238C CN 1112238 C CN1112238 C CN 1112238C CN 00125300 CN00125300 CN 00125300 CN 00125300 A CN00125300 A CN 00125300A CN 1112238 C CN1112238 C CN 1112238C
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- titanium dioxide
- iron
- titanate
- catalyst
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Abstract
The present invention relates to a titanium dioxide/iron nano composite powder catalyst. Titanate and iron nitrate are used as raw materials, a sol-gel technological method is adopted, namely that while hydrolysis forms a titanium dioxide network by the titanate, the soluble salt of iron is added, and thereby, titanium dioxide/iron oxide gel is firstly prepared. Then, gel is reduced by using hydrogen gas at certain temperature, iron oxides are reduced into nano metallic iron, and finally, the titanium dioxide/iron nano catalyst is prepared. Because of the existence of the nano metallic iron, the nano titanium dioxide/iron powder catalyst is easy to suck up by a magnet after the photocatalysis treatment of waste water, and thereby, the present invention solves a problem that the nano powder catalyst is difficult to recover after waste water treatment.
Description
Technical field:
The present invention relates to a kind of preparation technology of nano powder catalyst, relate in particular to a kind of composite nanometer titanium dioxide/iron powder catalyst and preparation technology thereof who very easily reclaims, belong to catalyst class new material technology field.
Background technology:
Along with industrial expansion, human basis limited water resource is subjected to serious day by day pollution, removes the poisonous and hazardous chemical substance in the water body, becomes an important process in environmental protection field as halogenated hydrocarbons, agricultural chemicals, surfactant etc.The photocatalytic degradation technology that development in recent years is got up is for addressing these problems the approach that provides good.As everyone knows, in the catalyst of being useful on photocatalytic degradation environmental contaminants, because of titanium dioxide active high, good stability, harmless and become the most valued a kind of photochemical catalyst.Yet, as the pretty peak of Chongqing Univ. of Architecture beans etc. at " nano-TiO
2Photochemical properties and the application in environmental science " introduce in the paper, titanium dioxide generally all is that the form with nano-powder directly is dispersed in and carries out catalytic degradation in the solution, although the efficient height, because of powder superfine, so reclaim very difficult.
Summary of the invention:
The objective of the invention is to propose a kind of brand-new composite nanometer titanium dioxide/iron powder catalyst and preparation method thereof, make this catalyst not only have good stability, harmless advantage can also effectively improve the rate of recovery to this powder catalyst.
For realizing such purpose, the present invention is in technical scheme, adopt the sol gel process method, prepare the novel nano powder catalyst of nano-titanium dioxide coated nano iron, promptly by titanate when hydrolysis forms the titanium dioxide network, the soluble-salt that adds iron, thereby at first make titanium dioxide/iron oxide gel, then at a certain temperature with gel, utilize hydrogen to reduce, iron oxide reduction is become nanometer metallic iron, finally prepare nano powder catalyst, i.e. the nanometer titanium dioxide/iron catalyst by titanium dioxide parcel atomic state iron.
Catalyst of the present invention is a raw material with titanate and ferric nitrate, TiO in the final catalyst powder
2With the weight ratio scope of Fe be 1: 1-6: 1.
Preparation of catalysts technology mainly comprises the steps:
1, titanate is dissolved in a certain amount of alcoholic solution stirred for several minute;
2, in the titanate alcoholic solution, add the mixed liquor of hydrochloric acid, water and the ethanol of configuration according to a certain ratio, vigorous stirring half an hour, obtain TiO
2Colloidal sol;
3, certain amount of ferric nitrate is joined in the ethanolic solution, treat that ferric nitrate dissolves the back fully and with dropper it joined TiO lentamente
2In the colloidal sol, leave standstill after continue stirring, treat that colloidal sol forms gel after, put in the drying box dry;
4, the gel powder reduces in 350 ℃ of-500 ℃ of hydrogen and obtains TiO
2/ Fe composite granule.
The titanate that the present invention adopts can be butyl titanate, titanium tetrachloride or isopropyl titanate etc.
The present invention has adopted sol gel process, can guarantee that two kinds of components mix at molecular level.Because nanometer iron is wrapped up by titanium dioxide, so the existence of nanometer iron does not have influence on the catalytic performance of titanium dioxide powder, has also increased the specific area of titanium dioxide simultaneously, so can improve its catalytic efficiency.The existence of nanometer metallic iron makes nano titanium oxide/iron powder body catalyst behind photocatalysis treatment of waste water, is easy to be picked up by magnet, thereby has solved extremely difficult this problem that reclaims of nano powder catalyst after the wastewater treatment.Material of the present invention can be used for the purification of waste water, and has solved the difficult problem that reclaims of catalyst.
The specific embodiment:
Further specify technical scheme of the present invention below by specific embodiment.
Embodiment carries out according to the following steps:
1, the 5ml butyl titanate is dissolved in the ethanolic solution of 15ml, stirred 15 minutes;
2, in the butyl titanate alcoholic solution, dropwise add in advance the mixed liquor (HCl: H of hydrochloric acid, water and the ethanol of configuration by volume
2O: CH
3CH
2OH=1: 3: 50), vigorous stirring half an hour;
3, the 0.1g ferric nitrate is dissolved in the 2ml ethanolic solution, treats that ferric nitrate dissolves the back fully and with dropper it joined in the butyl titanate mixed liquor lentamente, continue to stir after 2 hours and leave standstill.
4, treat that colloidal sol forms gel after, put into drying box in 80 ℃ of temperature dry 12 hours;
5,, be placed on reduction acquisition in 6 hours TiO in 450 ℃ of hydrogen atmospheres with after the gel pulverizing
2/ Fe composite granule.
Claims (3)
1, a kind of composite nanometer titanium dioxide/iron powder catalyst is characterized in that with titanate and ferric nitrate be raw material, and nanometer iron is wrapped up by titanium dioxide in the final catalyst powder, wherein TiO
2With the weight ratio scope of Fe be 1: 1-6: 1, have photocatalysis performance, and can be picked up by magnet.
2,, it is characterized in that said titanate is butyl titanate, titanium tetrachloride or isopropyl titanate as the said composite nanometer titanium dioxide/iron powder catalyst of claim 1.
3, a kind of preparation technology as claim 1 or 2 said composite nanometer titanium dioxide/iron powder catalysts is characterized in that comprising the steps:
1) titanate is dissolved in the alcoholic solution stirs;
2) in the titanate alcoholic solution, add the mixed liquor vigorous stirring of hydrochloric acid, water and ethanol, obtain TiO
2Colloidal sol;
3) ferric nitrate is joined in the ethanolic solution, after the dissolving it slowly is added to TiO fully
2In the colloidal sol, leave standstill after continue stirring, treat that colloidal sol forms drying and crushing behind the gel;
4) the gel powder reduces in 350 ℃ of-500 ℃ of hydrogen, obtains TiO
2With the Fe composite granule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00125300 CN1112238C (en) | 2000-09-21 | 2000-09-21 | Composite nanometer titanium dioxide/iron powder catalyst and its preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00125300 CN1112238C (en) | 2000-09-21 | 2000-09-21 | Composite nanometer titanium dioxide/iron powder catalyst and its preparation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1288779A CN1288779A (en) | 2001-03-28 |
| CN1112238C true CN1112238C (en) | 2003-06-25 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00125300 Expired - Fee Related CN1112238C (en) | 2000-09-21 | 2000-09-21 | Composite nanometer titanium dioxide/iron powder catalyst and its preparation |
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| CN1312061C (en) * | 2003-12-31 | 2007-04-25 | 彭云龙 | Waste water purifying method and its magnetic puddler integrated device |
| CN100335171C (en) * | 2004-10-21 | 2007-09-05 | 北京大学 | Transition metal-gamma-Fe2o3 nano material, its preparation method and application |
| CN1323752C (en) * | 2005-04-30 | 2007-07-04 | 中国地质大学（武汉） | Manufacture of Ag+-Fe+ dosed TiO2 weakly exciting catalytic luminating film |
| CN100351011C (en) * | 2005-10-10 | 2007-11-28 | 北京科技大学 | Composite photo catalytic sewage treating material and its prepn |
| CN100357021C (en) * | 2006-06-06 | 2007-12-26 | 北京科技大学 | Process of preparing photocatalyst material with concentrated ilmenite |
| CN101259423B (en) * | 2008-04-10 | 2010-06-16 | 杭州电子科技大学 | Method for preparing multicomponent co-synergistic effect synergistic effect photocatalytic material composite nano tube |
| CN101347732B (en) * | 2008-09-04 | 2010-06-02 | 上海纳米技术及应用国家工程研究中心有限公司 | Method for preparing porous iron-doped titanic oxide photocatalyst |
| CN101362092B (en) * | 2008-09-11 | 2010-06-09 | 浙江理工大学 | Preparation method of magnetic iron supported titanium dioxide nano-rod photo-catalyst |
| CN102513077A (en) * | 2011-11-28 | 2012-06-27 | 江南大学 | Preparation method of titanium dioxide composite with photo-catalytic activity under sunlight |
| CN106334560A (en) * | 2016-09-26 | 2017-01-18 | 广西科技大学 | Preparation method of high-water-dispersibility iron-doped nano-titanium dioxide, and application of high-water-dispersibility iron-doped nano-titanium dioxide to degradation of molasses waste liquid |
| CN106964352B (en) * | 2017-03-31 | 2019-06-28 | 山东师范大学 | Novel photocatalysis material TiO2@Fe2O3、SrTiO3@Fe2O3Preparation and application |
| CN106984315B (en) * | 2017-04-26 | 2020-05-08 | 安徽大学 | Titanium dioxide magnetic-supported photocatalyst Fe/TiO2Preparation method of (1) |
| CN109482242A (en) * | 2018-12-07 | 2019-03-19 | 怀化学院 | Ni adulterates TiO2/ MOF-5 photochemical catalyst and preparation method thereof |
| CN109499619B (en) * | 2018-12-07 | 2021-10-01 | 怀化学院 | TiO2MIL-101 photocatalyst and preparation method thereof |
| CN109482241B (en) * | 2018-12-07 | 2021-08-17 | 怀化学院 | TiO2/MOF-5 photocatalyst and preparation method thereof |
| CN113546625B (en) * | 2021-04-02 | 2024-04-16 | 中国科学院城市环境研究所 | Electrostatic spinning defect TiO 2 /Fe 3 O 4 Composite nanofiber material and preparation method thereof |
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| CN1288779A (en) | 2001-03-28 |
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