CN105664908A - Preparation method of upconversion type photocatalyst - Google Patents
Preparation method of upconversion type photocatalyst Download PDFInfo
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- CN105664908A CN105664908A CN201410667343.3A CN201410667343A CN105664908A CN 105664908 A CN105664908 A CN 105664908A CN 201410667343 A CN201410667343 A CN 201410667343A CN 105664908 A CN105664908 A CN 105664908A
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Abstract
The invention relates to a preparation method of a nanoscale photocatalyst, in particular to a composite photocatalyst TiO2/Y2O3: Yb<3+> with visible-light response, and a preparation method of the composite photocatalyst TiO2/Y2O3: Yb<3+>. In the technology, a nanoscale TiO2 and upconversion agent Y2O3: Yb<3+> mixed nanometer powder system which is good in crystal form stability, uniform in size distribution and favorable in crystal development is obtained by a sol gel method, and degradation of organic pollutants can be performed under visible light.
Description
Technical field
The present invention relates to the preparation method of a kind of nano-scale photocatalyst, specifically relate to a kind of visible light-responded composite photo-catalyst TiO2/Y2O3:Yb3+And its preparation method, belong to inorganic field of photocatalytic material.
Background technology
In the last few years, various organic pollutant increases day by day, photocatalysis technology as a kind of advanced oxidation engineering for photochemical catalysis in dyestuff degraded application also get more and more. But material only can utilize when ultraviolet mostly, there is significant limitation for the application in reality. Therefore, the catalyzer that preparing has better effects under visible light just becomes necessary.
Nano titanium oxide is a kind of semiconductor material with photocatalytic activity, is namely a kind of semiconductor light-catalyst, and causes light-catalyzed reaction. After accepting uv irradiation, the surface reaction of semiconductor light-catalyst can produce the strong oxidizing property species such as hole (h+), hydroxyl radical free radical (.OH), superoxide anion (.O-2), almost without being selectively oxidized all organic pollutants, and complete mineralising can be made it. And it is stable, nontoxic that nano titanium oxide has wider band gap, chemical property, is the semiconductor light-catalyst generally used during current photocatalysis technology is studied.
But the band gap of titanium dioxide is 3.2eV, under the ultraviolet irradiation shorter than 400nm, only just can show activity, at indoor or the local work having ultraviolet lamp, almost can only can not utilizing visible ray, this limits the use of titanium dioxide optical catalyst greatly.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of cost low, there is nano level TiO visible light-responded, that the disposal efficiency is stable2/Y2O3:Yb3+Preparation technology, this technique can obtain the nano level TiO that stability of crystal form is better, even particle size distribution, crystal development are good2/Y2O3:Yb3+。
Preparation technology of the present invention, comprises the steps:
H2O, HCl, C2H5OH are joined in beaker in molar ratio, and under vigorous stirring, adds appropriate upper changing agent Y2O3:Yb3+ simultaneously, after ultrasonic disperse, dropwise add the mixing solutions containing tetrabutyl titanate and ethanol. Obtain transparent colloidal sol after continuing to stir 8-9h, obtain gel under room temperature after ageing, gel is placed in air dry oven 70-90 DEG C of drying to remove organic solvent. Finally, thermal treatment 1-2h at gained xerogel is placed in 500-600 DEG C, obtains sample and obtains the finished product.
Embodiment
The present invention is not limited by the following examples.
Embodiment 1
By 10mlH2O,1mlHCl,150mlC2H5OH joins in beaker, and under vigorous stirring, adds changing agent Y on 3g simultaneously2O3:Yb3+, after ultrasonic disperse 2h, dropwise add the mixing solutions 10ml containing tetrabutyl titanate and ethanol. Obtain transparent colloidal sol after continuing to stir 8h, obtain gel under room temperature after ageing, gel is placed in air dry oven 70 DEG C of dryings to remove organic solvent.Finally, thermal treatment 2h at gained xerogel is placed in 500 DEG C, obtains sample and obtains the finished product.
Embodiment 2
By 20mkH2O,2mlHCl,300mlC2H5OH joins in beaker, and under vigorous stirring, adds changing agent Y on 5g simultaneously2O3:Yb3+, after ultrasonic disperse 3h, dropwise add the mixing solutions 20ml containing tetrabutyl titanate and ethanol. Obtain transparent colloidal sol after continuing to stir 9h, obtain gel under room temperature after ageing, gel is placed in air dry oven 80 DEG C of dryings to remove organic solvent. Finally, thermal treatment 2h at gained xerogel is placed in 550 DEG C, obtains sample and obtains the finished product.
Claims (2)
1. the present invention relates to the preparation method of a kind of visible-light response type nano level photocatalyst, obtain TiO by sol-gel method2With upper changing agent Y2O3:Yb3+Mixing nanopowder systems, it may be achieved carry out mechanism of degradation pollutent under visible light.
2. the preparation process of visible-light response type nano level photocatalyst: by H2O,HCl,C2H5OH joins in beaker in molar ratio, and under vigorous stirring, adds appropriate upper changing agent Y simultaneously2O3:Yb3+, after ultrasonic disperse, dropwise add the mixing solutions containing tetrabutyl titanate and ethanol; Obtain transparent colloidal sol after continuing to stir 8-9h, obtain gel under room temperature after ageing, gel is placed in air dry oven 70-90 DEG C of drying to remove organic solvent; Finally, thermal treatment 1-2h at gained xerogel is placed in 500-600 DEG C, obtains sample and obtains the finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410667343.3A CN105664908A (en) | 2014-11-20 | 2014-11-20 | Preparation method of upconversion type photocatalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410667343.3A CN105664908A (en) | 2014-11-20 | 2014-11-20 | Preparation method of upconversion type photocatalyst |
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| CN105664908A true CN105664908A (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410667343.3A Pending CN105664908A (en) | 2014-11-20 | 2014-11-20 | Preparation method of upconversion type photocatalyst |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101642702A (en) * | 2009-09-09 | 2010-02-10 | 吉林大学 | Red light or infrared light catalytic material comprising semiconductor material and up-conversion material |
| CN101775290A (en) * | 2010-02-10 | 2010-07-14 | 西北大学 | Preparation method of visible light absorption type upper conversion luminescent material |
| US20110045204A1 (en) * | 2008-02-18 | 2011-02-24 | The Robert Gordon University | Coating process and coated products |
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2014
- 2014-11-20 CN CN201410667343.3A patent/CN105664908A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110045204A1 (en) * | 2008-02-18 | 2011-02-24 | The Robert Gordon University | Coating process and coated products |
| CN101642702A (en) * | 2009-09-09 | 2010-02-10 | 吉林大学 | Red light or infrared light catalytic material comprising semiconductor material and up-conversion material |
| CN101775290A (en) * | 2010-02-10 | 2010-07-14 | 西北大学 | Preparation method of visible light absorption type upper conversion luminescent material |
Non-Patent Citations (1)
| Title |
|---|
| YE YANXI等: "Preparation and luminescence properties of Y2O3:Er3+/TiO2 with high specific surface area", 《CHINESE SCI BULL》 * |
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Application publication date: 20160615 |