CN102941087A - Composite silver-titanium catalyst preparation method - Google Patents
Composite silver-titanium catalyst preparation method Download PDFInfo
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- CN102941087A CN102941087A CN2012104107121A CN201210410712A CN102941087A CN 102941087 A CN102941087 A CN 102941087A CN 2012104107121 A CN2012104107121 A CN 2012104107121A CN 201210410712 A CN201210410712 A CN 201210410712A CN 102941087 A CN102941087 A CN 102941087A
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- China
- Prior art keywords
- silver
- titanium
- solution
- titanium catalyst
- urea
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The present invention discloses a composite silver-titanium catalyst preparation method, and belongs to the field of sewage treatment. The preparation method comprises: weighing a certain mass of silver nitrate, a certain mass of titanium tetranitrate and a certain mass of urea, and preparing into a solution, wherein a molar ratio of Ag<+> to Ti<4+> to urea is 2:1:10-4:1:10, and the total concentration of Ag<+> ions and Ti<4+> ions in the solution is 4-6 mol/L; pouring the solution to a hydrothermal kettle, placing the hydrothermal kettle in an oven to carry out crystallization for 24-36 h at a temperature of 120-130 DEG C; cooling to a room temperature; carrying out suction filtration washing to achieve a neutral state; drying filter cake for 8-12 h at a temperature of 80-90 DEG C to obtain silver-titanium type hydrotalcite; and carrying out calcination on the silver-titanium type hydrotalcite for 3-4 h at a temperature of 450-550 DEG C to prepare the layered composite silver-titanium catalyst with characteristics of nanometer effect and absorption promotion.
Description
Technical field
The present invention relates to a kind of preparation method of composite silver titanium catalyst, belong to technical field of sewage in the environmental protection.
Background technology
Traditional method for treating water efficient is low, cost is high, have secondary pollution problems, the solution that waste water control can not get always.The development of nanometer technology and application probably thoroughly solve this difficult problem.Began to find TiO in 1972
2Oxidation activity is higher, and chemical stability is good, and to the human body nonhazardous, cost is low, and is pollution-free, applied range, thereby paid attention to most, but TiO
2Large (the anatase TiO for example of energy gap
2Energy gap Eg=3.2 eV), only can absorb the light of ultraviolet region (wavelength is less than 387 nm), lower to the utilization ratio of solar energy.
Nano-noble metal has broad application prospects in fields such as chemical catalysis, the energy, electronics and biologies as an important component part of nano material, has obtained paying attention to more and more widely.Utilize nanometer Ag
2O is to TiO
2Nano particle carries out modification, as at its area load, just might pass through to affect TiO
2The electronic behavior of conduction band and affect the efficient of sensitization photocatalytic process.Utilize TiO
2The noble-metal-cluster on surface is injected into TiO with the excitation state dye molecule
2Then the reaction of electronics and adsorb oxygen occurs in the electron capture on the conduction band on the surface of noble-metal-cluster, what this process had promoted conduction band electron and dyestuff radical cation separates and suppresses charge recombination, thus the photocatalysis efficiency of raising dyestuff.
Traditional complex method is take certain material as matrix, and then passes through another kind of material in the physical contact load at this matrix, and two kinds of materials easily separate in conjunction with defective tightness, can not give full play to degradation efficiency.
Hydrotalcite-based compound (LDHs) is to pile up the compound that forms by interlayer anion and positively charged laminate.The hydrotalcite chemical structure of general formula is: [M
2+ 1-xM
3+X (OH)
2]
X+[(A
N-)
X/nMH
2O], M wherein
2+And M
3+Be respectively the divalence and the trivalent metal cation that are positioned on the main body laminate, such as Mg
2+, Ni
2+, Zn
2+, Mn
2+, Cu
2+, Co
2+, Pd
2+, Fe
2+Deng bivalent cation and Al
3+, Cr
3+, Co
3+, Fe
3+All can form hydrotalcite Deng Tricationic; A
N –Be interlayer anion, can comprise inorganic anion, organic anion, complex anion, same many and heteropolyanion; X is M
3+/ (M
2++ M
3+) molar ratio, approximately be that 4:1 is to 2:1; M is the number of intermediary water molecule.Its structure is similar to shepardite Mg (OH)
2, share seamed edge and form the main body laminate by octahedron.Be positioned at the divalent metal M on the laminate
2+Can be by the close trivalent metal cation M of ion half price in certain proportion
3+The isomorphous replaces so that laminate is positively charged, interlayer exist can exchange anion and the positive charge balance on the laminate so that the overall structure of LDHs is electroneutral.The anion of interlayer can be exchanged, and through a series of modifications, hydrotalcite material can obtain the many kinds of materials that performance is different.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of preparation method of composite silver titanium catalyst is proposed, silver oxide and titanium oxide be prepared into nanoscale twins is interlaced is in the same place, be beneficial to absorption, not only can keep its nano effect but also can be beneficial to precipitate and separate.
Technical scheme of the present invention is to adopt following steps: take by weighing first silver nitrate, four Titanium Nitrates and the urea wiring solution-forming of certain mass, make Ag
+, Ti
4+, urea mol ratio be 2:1:10～4:1:10, Ag in the solution
+, Ti
4+Total ion concentration is 4 ~ 6mol/L, then this solution is poured in the water heating kettle, and water heating kettle is placed 120 ~ 130 ℃ of crystallization 24 ~ 36 h of baking oven, is cooled to room temperature, and filtering and washing is to neutral, and 80 ~ 90 ℃ of drying 8 ~ 12 h of filter cake obtain silver-colored titanium type houghite; The silver-colored titanium type houghite that will obtain at last makes stratiform composite silver titanium catalyst at 450 ~ 550 ℃ of lower roasting 3 ~ 4h.
The invention has the beneficial effects as follows:
1. this body structure of catalyst is stratiform, and specific area is large, macroscopic particles arrives between millimeter at micron, but microcosmic is nano material.
2. catalyst forms the nanometer layer structure, has nano effect, is conducive to bring into play catalytic effect.
3. layer structure is conducive to form larger specific area, can promote absorption, and then make catalytic effect better.
4. titanium and silver mix between both mutually, combine closely, and can effectively bring into play mutual synergy.
Embodiment 1
Take by weighing silver nitrate, four Titanium Nitrates and the urea wiring solution-forming of certain mass, make Ag
+, Ti
4+, urea mol ratio be 2:1:10, the Ag of configuration
+, Ti
4+Total ion concentration is 6mol/L, then the solution for preparing is poured in the water heating kettle, and water heating kettle is placed 130 ℃ of crystallization 36 h of baking oven.Be cooled to room temperature, filtering and washing is to neutral, and 80 ℃ of drying 12 h of filter cake obtain silver-colored titanium hydrotalcite; The solid that obtains at 550 ℃ of lower roasting 3h, is made the composite silver titanium catalyst of stratiform.
The composite silver titanium catalyst 0.5g that obtains is joined in the acid red waste water that 500 mL concentration are 40 mg/L, under the irradiation of 500w Metal halogen lamp, react 25 min, percent of decolourization is 97.6%, can reuse after the catalyst separation.
Embodiment 2
Take by weighing silver nitrate, four Titanium Nitrates and the urea wiring solution-forming of certain mass, make Ag
+, Ti
4+, urea mol ratio be 4:1:10, the Ag of configuration
+, Ti
4+Total ion concentration is 4mol/L, then the solution for preparing is poured into respectively in the water heating kettle, and water heating kettle is placed 120 ℃ of crystallization 24 h of baking oven.Be cooled to room temperature, filtering and washing is to neutral, and 90 ℃ of drying 8 h of filter cake obtain silver-colored titanium hydrotalcite; The solid that obtains at 450 ℃ of lower roasting 4h, is made the composite silver titanium catalyst of stratiform.
The composite silver titanium catalyst 0.5g that obtains is joined in gold orange 7 waste water that 500 mL concentration are 40 mg/L, under the irradiation of 500w Metal halogen lamp, react 25 min, percent of decolourization is 98.3%, can reuse after the catalyst separation.
Embodiment 3
Take by weighing silver nitrate, four Titanium Nitrates and the urea wiring solution-forming of certain mass, make Ag
+, Ti
4+, urea mol ratio be 3:1:10, the Ag of configuration
+, Ti
4+Total ion concentration is 5mol/L, then the solution for preparing is poured into respectively in the water heating kettle, and water heating kettle is placed 125 ℃ of crystallization 28 h of baking oven.Be cooled to room temperature, filtering and washing is to neutral, and 85 ℃ of drying 10 h of filter cake obtain silver-colored titanium hydrotalcite; The solid that obtains at 500 ℃ of lower roasting 4h, is made the composite silver titanium catalyst of stratiform.
The composite silver titanium catalyst 0.5g that obtains is joined in the rose red b waste water that 500 mL concentration are 40 mg/L, under the irradiation of 500w Metal halogen lamp, react 25 min, percent of decolourization is 96.9%, can reuse after the catalyst separation.
Claims (1)
1. the preparation method of a composite silver titanium catalyst is characterized in that adopting following steps:
1) takes by weighing silver nitrate, four Titanium Nitrates and the urea wiring solution-forming of certain mass, make Ag
+, Ti
4+, urea mol ratio be 2:1:10～4:1:10, Ag in the solution
+, Ti
4+Total ion concentration is 4 ~ 6mol/L, then this solution is poured in the water heating kettle, and water heating kettle is placed 120 ~ 130 ℃ of crystallization 24 ~ 36 h of baking oven, is cooled to room temperature, and filtering and washing is to neutral, and 80 ~ 90 ℃ of drying 8 ~ 12 h of filter cake obtain silver-colored titanium type houghite;
The silver-colored titanium type houghite that 2) will obtain makes stratiform composite silver titanium catalyst at 450 ~ 550 ℃ of lower roasting 3 ~ 4h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104107121A CN102941087A (en) | 2012-10-25 | 2012-10-25 | Composite silver-titanium catalyst preparation method |
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|---|---|---|---|
| CN2012104107121A CN102941087A (en) | 2012-10-25 | 2012-10-25 | Composite silver-titanium catalyst preparation method |
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|---|---|
| CN102941087A true CN102941087A (en) | 2013-02-27 |
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ID=47724130
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|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627174A (en) * | 2013-09-06 | 2014-03-12 | 杭州师范大学 | Preparation method and application of size-controlled silver-titanium nanoparticle composite material |
| CN107088405A (en) * | 2017-04-24 | 2017-08-25 | 太原理工大学 | A kind of preparation method of modified nano-titanium dioxide photochemical catalyst |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005254102A (en) * | 2004-03-10 | 2005-09-22 | Dainippon Printing Co Ltd | Photocatalyst-containing composition and photocatalyst-containing layer |
| CN100360227C (en) * | 2005-03-15 | 2008-01-09 | 浙江大学 | Method for preparing load type photocatalyst of titania modified by Argentine |
| US20080081758A1 (en) * | 2006-09-28 | 2008-04-03 | Taketoshi Kuroda | Photocatalytic titanium oxide sol, and coating composition and member using the same |
| CN102626622A (en) * | 2012-03-28 | 2012-08-08 | 武汉理工大学 | Preparation method of Ag/Ag (I)-TiO2 nanocrystalline visual light photochemical catalyst |
-
2012
- 2012-10-25 CN CN2012104107121A patent/CN102941087A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005254102A (en) * | 2004-03-10 | 2005-09-22 | Dainippon Printing Co Ltd | Photocatalyst-containing composition and photocatalyst-containing layer |
| CN100360227C (en) * | 2005-03-15 | 2008-01-09 | 浙江大学 | Method for preparing load type photocatalyst of titania modified by Argentine |
| US20080081758A1 (en) * | 2006-09-28 | 2008-04-03 | Taketoshi Kuroda | Photocatalytic titanium oxide sol, and coating composition and member using the same |
| CN102626622A (en) * | 2012-03-28 | 2012-08-08 | 武汉理工大学 | Preparation method of Ag/Ag (I)-TiO2 nanocrystalline visual light photochemical catalyst |
Non-Patent Citations (3)
| Title |
|---|
| MINGFEI SHAO ET AL: "The synthesis of hierarchical Zn–Ti layered double hydroxide for efficient visible-light photocatalysis", 《CHEMICAL ENGINEERING JOURNAL》, vol. 168, 31 December 2011 (2011-12-31) * |
| W.H. ZHANG ET AL: "Preparation of Ni(II)/Ti(IV) layered double hydroxide at high supersaturation", 《JOURNAL OF THE EUROPEAN CERAMIC SOCIETY》, vol. 28, 19 February 2008 (2008-02-19), XP022575002 * |
| YEOB LEE ET AL: "Titanium-embedded layered double hydroxides as highly efficient water oxidation photocatalysts under visible light", 《ENERGY & ENVIRONMENTAL SCIENCE》, vol. 4, 7 January 2011 (2011-01-07) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627174A (en) * | 2013-09-06 | 2014-03-12 | 杭州师范大学 | Preparation method and application of size-controlled silver-titanium nanoparticle composite material |
| CN103627174B (en) * | 2013-09-06 | 2015-10-28 | 杭州师范大学 | The preparation method of the silver-colored titanium nano particle composite material that a kind of size is controlled and application |
| CN107088405A (en) * | 2017-04-24 | 2017-08-25 | 太原理工大学 | A kind of preparation method of modified nano-titanium dioxide photochemical catalyst |
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Application publication date: 20130227 |