CN1332065C - Production of quantum point nanometer titanium dioxide composite membrane - Google Patents
Production of quantum point nanometer titanium dioxide composite membrane Download PDFInfo
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- CN1332065C CN1332065C CNB2005100181883A CN200510018188A CN1332065C CN 1332065 C CN1332065 C CN 1332065C CN B2005100181883 A CNB2005100181883 A CN B2005100181883A CN 200510018188 A CN200510018188 A CN 200510018188A CN 1332065 C CN1332065 C CN 1332065C
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- titanium dioxide
- quantum dot
- nanometer titanium
- composite membrane
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Abstract
The present invention discloses a method for preparing a quantum dot nanometer titanium dioxide complex film, which comprises the following steps: firstly, respectively synthesizing a nanometer titanium dioxide film and quantum dots; then modifying the quantum dots with small molecules which can modify the surfaces of the quantum dots and comprises carboxyl functional groups; finally, preparing a quantum dot nanometer titanium dioxide complex film by a self-assembly method. The quantum dot nanometer titanium dioxide complex film prepared by the method has excellent visible-light catalysis capability and good stability, so the quantum dot nanometer titanium dioxide complex film can be widely applied to the field of sterilization, etc.
Description
Technical field
The present invention relates to a kind of preparation method of quantum point nanometer titanium dioxide composite membrane.
Background technology
At present, the preparation method of quantum point nanometer titanium dioxide composite membrane normally makes nanometer titanium dioxide composite membrane earlier, then nanometer titanium dioxide composite membrane is placed the reaction vessel of preparation quantum dot, in the process of preparation quantum dot, quantum dot is deposited on the nanometer titanium dioxide composite membrane, can not get better controlled owing to be deposited on the particle diameter of the quantum dot on the nanometer titanium dioxide composite membrane, therefore the particle diameter of the quantum dot on the quantum point nanometer titanium dioxide composite membrane is at random, and quantum point nanometer titanium dioxide composite membrane uses under the visible light condition usually, the wavelength of visible light scope is a fixed, so the particle diameter of the quantum dot catalytic capability that can influence quantum point nanometer titanium dioxide composite membrane at random.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of quantum point nanometer titanium dioxide composite membrane, a kind of preparation method of quantum point nanometer titanium dioxide composite membrane is provided, the quantum point nanometer titanium dioxide composite membrane that makes by this method has the excellent visible light catalytic capability, stability is also fine, therefore, can be applied to fields such as sterilization and disinfection widely.
Technical scheme provided by the invention is: a kind of preparation method of quantum point nanometer titanium dioxide composite membrane, and its step is as follows:
(1) method by liquid deposition prepares nano titanium dioxide film;
(2) the CdSe/ZnS core/shell type quantum dot with 4nm-8nm is dissolved in the non-polar solvent, makes the solution that concentration range is the 0.5-2.5mg/ml quantum dot;
(3) get the solution that contains quantum dot in right amount, use the small molecules that to modify the quantum dot surface and contain carboxyl function group to modify, make the quantum dot surface be with carboxyl by ordinary method;
(4) quantum dot after will modifying is dissolved in and makes the quantum dot solution of concentration range at 0.1-1mg/ml in the suitable quantity of water, the nano titanium dioxide film that will make immerses in the solution of this quantum dot then, placed 6-24 hour down at 1-30 ℃, taking-up dries up with big water gaging flushing, promptly obtains quantum point nanometer titanium dioxide composite membrane.
Wherein used non-polar solvent is normal hexane, toluene, chloroform.The small molecules that can modify quantum dot surface and contain carboxyl function group is Thiovanic acid, halfcystine, sulfydryl undeeanoic acid.
The present invention adopts the stepwise synthesis method of self-assembly then, elder generation is synthesis of nano titanium dioxide film and core/shell type quantum dot respectively, choosing required particle diameter quantum dot then modifies with small molecules, method by self-assembly makes quantum point nanometer titanium dioxide composite membrane at last, the quantum point nanometer titanium dioxide composite membrane of this method preparation is concentrated because of quantum point grain diameter, so have the excellent visible light catalytic capability, make for self-assembly because of it again, stability is also fine, and this preparation method is workable, and is simple.
Embodiment
The present invention adopts the stepwise synthesis method of self-assembly then, and its specific embodiment is as follows:
(1) method by liquid deposition prepares nano titanium dioxide film;
(2) be that the core/shell type quantum dot of 4nm-8nm is dissolved in the normal hexane with the particle diameter that makes, making concentration is the hexane solution of the core/shell type quantum dot of 1mg/ml, the CdSe/ZnS core/shell type quantum dot that the core/shell type quantum dot can adopt the preparation method of ZL02139152.1 patent disclosure to make;
(3) get the above-mentioned hexane solution that contains the core/shell type quantum dot of 1ml, quantum dot is modified by ordinary method with the small molecules that can modify quantum dot surface and contain carboxyl function group, concrete operations are for adding 1ml methyl alcohol eccentric cleaning and be dispersed in 0.5mlN in solution earlier, in the dinethylformamide, on shaking table, vibrated 30 minutes after adding the 0.5ml Thiovanic acid again, make carboxyl in the quantum dot finishing, add the centrifugation of 1ml tetrahydrofuran (THF) then and go out carboxylated quantum dot;
(4) carboxylated quantum dot is dissolved in the 1ml water, then the nano titanium dioxide film that makes is immersed in this solution, placed 12 hours down at 4 ℃, taking-up dries up with big water gaging flushing, promptly obtains quantum point nanometer titanium dioxide composite membrane.
Adopt aforesaid method of the present invention also can to self-assemble on the nanometer titanium dioxide composite membrane by the quantum dot that other is carboxylated.
Claims (3)
1. the preparation method of a quantum point nanometer titanium dioxide composite membrane is characterized in that adopting following step:
(1) method by liquid deposition prepares nano titanium dioxide film;
(2) the CdSe/ZnS core/shell type quantum dot with 4nm-8nm is dissolved in the non-polar solvent, makes the solution that concentration range is the 0.5-2.5mg/ml quantum dot;
(3) get the solution that contains quantum dot in right amount, use the small molecules that to modify the quantum dot surface and contain carboxyl function group to modify, make the quantum dot surface be with carboxyl by ordinary method;
(4) quantum dot after will modifying is dissolved in and makes the quantum dot solution of concentration range at 0.1-1mg/ml in the suitable quantity of water, the nano titanium dioxide film that will make immerses in the solution of this quantum dot then, placed 6-24 hour down at 1-30 ℃, taking-up dries up with big water gaging flushing, promptly obtains quantum point nanometer titanium dioxide composite membrane.
2. the preparation method of quantum point nanometer titanium dioxide composite membrane according to claim 1, it is characterized in that: non-polar solvent is normal hexane, toluene, chloroform.
3. the preparation method of quantum point nanometer titanium dioxide composite membrane according to claim 1 and 2, it is characterized in that: small molecules is Thiovanic acid, halfcystine, sulfydryl undeeanoic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100181883A CN1332065C (en) | 2005-01-24 | 2005-01-24 | Production of quantum point nanometer titanium dioxide composite membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100181883A CN1332065C (en) | 2005-01-24 | 2005-01-24 | Production of quantum point nanometer titanium dioxide composite membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1644757A CN1644757A (en) | 2005-07-27 |
| CN1332065C true CN1332065C (en) | 2007-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100181883A Expired - Fee Related CN1332065C (en) | 2005-01-24 | 2005-01-24 | Production of quantum point nanometer titanium dioxide composite membrane |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464014B (en) * | 2013-09-25 | 2015-06-10 | 天津工业大学 | Method for inhibiting bacteria on surface of hollow fiber membrane |
| CN105388660B (en) * | 2015-12-17 | 2018-05-01 | 深圳市华星光电技术有限公司 | The preparation method of COA type array base paltes |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09102596A (en) * | 1995-10-04 | 1997-04-15 | Fujitsu Ltd | Manufacture of quantum dot and quantum dot apparatus |
| CN1188814A (en) * | 1997-11-14 | 1998-07-29 | 中国科学院固体物理研究所 | Preparing method for inlaid dimension controllable nanometre grade silver particle on barium titanate film |
| CN1386916A (en) * | 2001-05-17 | 2002-12-25 | 上海大学 | Process for preparing optically catalytic TiO2 film |
-
2005
- 2005-01-24 CN CNB2005100181883A patent/CN1332065C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09102596A (en) * | 1995-10-04 | 1997-04-15 | Fujitsu Ltd | Manufacture of quantum dot and quantum dot apparatus |
| CN1188814A (en) * | 1997-11-14 | 1998-07-29 | 中国科学院固体物理研究所 | Preparing method for inlaid dimension controllable nanometre grade silver particle on barium titanate film |
| CN1386916A (en) * | 2001-05-17 | 2002-12-25 | 上海大学 | Process for preparing optically catalytic TiO2 film |
Non-Patent Citations (1)
| Title |
|---|
| Ⅱ-Ⅵ型量子点制备及其在生物检测中应用研究进展 谢海燕，庞代文，分析化学，第32卷第8期 2004 * |
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| CN1644757A (en) | 2005-07-27 |
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