CN106040211A - Preparation method of yellow TiO2 photocatalytic material capable of absorbing visible light - Google Patents

Preparation method of yellow TiO2 photocatalytic material capable of absorbing visible light Download PDF

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Publication number
CN106040211A
CN106040211A CN201610368560.1A CN201610368560A CN106040211A CN 106040211 A CN106040211 A CN 106040211A CN 201610368560 A CN201610368560 A CN 201610368560A CN 106040211 A CN106040211 A CN 106040211A
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preparation
tio
water
ethanol
ethylene glycol
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CN106040211B (en
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刘媛媛
姜在勇
黄柏标
张晓阳
秦晓燕
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Shandong University
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Shandong University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/06Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • B01J21/063Titanium; Oxides or hydroxides thereof
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/10Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by subjecting to electric or wave energy or particle or ionizing radiation
    • A62D3/17Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by subjecting to electric or wave energy or particle or ionizing radiation to electromagnetic radiation, e.g. emitted by a laser
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39Photocatalytic properties
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/20Organic substances
    • A62D2101/28Organic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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Abstract

The invention discloses a preparation method of yellow TiO2 photocatalytic material capable of absorbing visible light and belongs to the technical field of preparation of photocatalytic materials. The method comprises: stirring and mixing well ethanol and ethylene glycol monomethyl ether at room temperature, dropping deionized water into a mixed solution of the ethanol and ethylene glycol monomethyl ether, continuing to stir, dropping tetrabutyl titanate into the above mixed solution, stirring to evenly disperse the solution, placing a reaction product in a closed reactor, reacting at 180 DEG C for 12-24 h, and cooling, suction-filtering, washing and vacuum-drying to obtain yellow TiO2. The yellow TiO2 photocatalytic material prepared herein can effectively absorb visible light and photocatalytically degrade organic pollutants in the visible light; the preparation method is simple, reaction materials are widely sourced, experimental steps are easy to perform, and the preparation method is available for batch production.

Description

A kind of yellow TiO with visible absorption performance2The preparation method of catalysis material
Technical field
The invention belongs to the preparing technical field of catalysis material, relate to a kind of yellow with visible absorption performance TiO2Preparation method.
Background technology
Energy and environment problem is the two big subject matters that human social is faced, and photocatalysis technology is solving Certainly the aspect such as environmental pollution and energy shortage has potential application prospect.From Japanese scholars Fujishima in 1972 etc. first Find TiO under action of ultraviolet light2Since Single Crystalline Electrodes can make the phenomenon of water decomposition, photocatalysis technology causes extensive concern.Mesh Before, a lot of catalysis materials are in the news and have good photocatalysis performance, such as TiO2、ZnO、CdS、Fe2O3, BiOCl etc..
TiO2There is nontoxic, good stability, cheap, the ultraviolet light photocatalysis high performance of activity, thus make it research The most extensively with the most common catalysis material of application, and tentatively realize industrialized production.In recent decades, scientific research both domestic and external Worker is to TiO2Based on photocatalyst carried out substantial amounts of research, and achieve huge progress, but still exist Problem, TiO2It is wide band gap semiconducter (band gap is 3.2eV), therefore TiO2Only with the ultraviolet light portion accounting for sunlight about 4% Point, this greatly reduces the utilization rate of sunlight.
Expand TiO2Light absorb, it is achieved the full light of sunlight is absorbed and utilizes by TiO2, is TiO2Catalysis material is in reality A significant challenge in the application of border.So far, various method has been had to be suggested expansion TiO2Light absorb, As: metal or nonmetal doping TiO2、TiO2Auto-dope (Ti3+), dye sensitization TiO2、TiO2The organic titanium photocatalysis material of base Material etc..Wherein, TiO2The organic titanium catalysis material of base causes the extensive concern of researcher it is considered to be realize TiO2Can See the method the most promising that light absorbs.But, it is little about the synthetic method of this respect and the report of the mechanism of action, How to excavate and new simple efficient synthetic method is provided, being still emphasis and the difficult point of this area research.
Summary of the invention
For prior art TiO2The present situation of catalysis material research and the problem of above-mentioned existence, inventor grinds through overtesting Study carefully, disclose a kind of yellow TiO with visible absorption2The preparation method of catalysis material, utilizes colourless organic molecule second two Alcohol methyl ether has synthesized yellow TiO by one step hydro thermal method2, this yellow TiO2The absorption band edge of catalysis material extends from 406nm To 605nm, this material list reveals the catalytic performance of good Visible Light Induced Photocatalytic organic pollution, thus for preparing visible absorption TiO2Catalysis material provides a new approach.
An object of the present invention is to provide a kind of yellow TiO with visible absorption2The preparation of catalysis material Method.
The two of the purpose of the present invention are to provide a kind of yellow TiO with visible absorption2Catalysis material.
Another object of the present invention is to provide yellow TiO with visible absorption obtained2Catalysis material Application.
For achieving the above object, the present invention relates to techniques below scheme:
First, the invention discloses a kind of yellow TiO with visible absorption2The preparation method of catalysis material, institute The method of stating includes:
The presoma of titanium is joined in water/organic two-phase system, carries out hydrothermal synthesis reaction, prepare have visible Yellow TiO that light absorbs2Catalysis material;
The presoma of described titanium is butyl titanate;
Described water/organic two-phase system is water, ethanol and the mixed system of ethylene glycol monomethyl ether (methyl cellosolve).
The present invention uses presoma and the hydrothermal synthesis reaction in water/organic two-phase system of titanium, has prepared and has had The TiO of visible absorption2Catalysis material, it is provided that a kind of new TiO2The preparation method of catalysis material.
In preferred embodiment, ethanol, ethylene glycol monomethyl ether and the consumption of water in water of the present invention/organic two-phase system Mol ratio is (10-20): (5-15): 1.Different alcohol and alcohol replacement amount synthesize TiO to the present invention2The purity of catalysis material and shape Looks produce impact, experiment proves that under the conditions of this preferred proportion, the TiO of synthesis2Catalysis material best performance, for Yellow TiO2, the absorption band edge of catalysis material expands to 605nm from 406nm, and band gap is 2.1eV.It is furthermore preferred that ethanol, second two The consumption mol ratio of alcohol methyl ether and water is 15:10:1.
In preferred embodiment, butyl titanate of the present invention is 1:45-55 with the volume ratio of water/organic two-phase system.
In highly preferred embodiment, the TiO with visible absorption of the present invention2The preparation side of catalysis material Method, step is as follows:
(1) ethanol and ethylene glycol monomethyl ether are mixed by a certain percentage, be sufficiently stirred for 3-10min;
(2) a certain amount of deionized water is instilled in the mixed solution of above-mentioned ethanol and ethylene glycol monomethyl ether, be sufficiently stirred for 5- 20min;
(3) a certain amount of butyl titanate is added dropwise in above-mentioned mixed solution, stirs 10-30min so that it is mix homogeneously;
(4) mixed solution is transferred in teflon-lined reactor, the baking oven of 160-200 DEG C reacts 12- 24h, natural cooling, washing, dried product;
The consumption mol ratio of described ethanol, ethylene glycol monomethyl ether and water is 15:10:1;
Butyl titanate is 1:(1.5-2 with the volume ratio of water).
Secondly, the present invention provides yellow TiO with visible absorption that above-mentioned preparation method prepares2Photocatalysis material Material.
Additionally, the present invention provides described yellow TiO2Catalysis material application in degradable organic pollutant.
The method have the advantages that
(1) raw material sources that preparation method of the present invention relates to are extensive, decrease energy waste and environmental pollution, and Preparation cost is low;
(2) TiO of the present invention2Catalysis material synthetic method is simple, only needs a step hydro-thermal just can prepare;
(3) yellow TiO prepared by the present invention2Catalysis material, absorbs band edge and expands to 605nm from 406nm, have good The catalytic performance of good Visible Light Induced Photocatalytic organic pollution;
(4) TiO with visible absorption that prepared by the present invention2The photocatalyst mechanism of action is the effect of hydrogen bond, this machine Reason has the TiO of visible absorption for preparation2Photocatalyst provides a new approach.
Accompanying drawing explanation
Fig. 1 is the X ray picture of the embodiment of the present invention 1 product
Fig. 2 is the SEM figure of the embodiment of the present invention 1 product
Fig. 3 photocatalytic degradation has pollutant machine thing activity
The infrared spectrogram of the product of Fig. 4 embodiment 1 gained
Detailed description of the invention:
Embodiment 1 yellow TiO2Catalysis material (MES-TiO2) preparation
Measure 30ml ethanol respectively and 20ml ethylene glycol monomethyl ether joins the polytetrafluoroethyllining lining high pressure that volume is 100ml In reactor, it is stirred continuously and makes two kinds of solution be sufficiently mixed;Measure 2ml deionized water and instill above-mentioned mixed solution, continue to stir Mix and make mixed solution form uniform solution, then 1ml butyl titanate is added drop-wise to above-mentioned mixed solution slowly, continues to stir Mix 20min.Finally reactor is put in 180 DEG C of baking ovens and react 24 hours, natural cooling under room temperature, sucking filtration, use deionized water With dehydrated alcohol washing sample 3 times respectively, it is vacuum dried 6h, obtains product yellow TiO2
Embodiment 2 yellow TiO2The preparation of catalysis material
Measure 20.0ml ethanol respectively and 13.3ml ethylene glycol monomethyl ether joins the polytetrafluoroethyllining lining that volume is 100ml In autoclave, it is stirred continuously and makes two kinds of solution be sufficiently mixed;Measure 1ml deionized water and instill above-mentioned mixed solution, continue Continuous stirring makes mixed solution form uniform solution, then 0.67ml butyl titanate is added drop-wise to above-mentioned mixing slowly molten Liquid, continues stirring 20min.Finally reactor is put in 180 DEG C of baking ovens and react 18 hours, natural cooling under room temperature, sucking filtration, use Washing sample 3 times respectively of deionized water and dehydrated alcohol, are vacuum dried 6h, obtain product yellow TiO2
Embodiment 3 yellow TiO2The sign of catalysis material
Using Bruker AXS D8 X-ray diffractometer to carry out the material phase analysis of sample, using Cu K α X-ray is ray Source.Fig. 1 is the X-ray diffractogram of embodiment 1 products therefrom, as shown in Figure 1, each diffraction maximum of this product all with anatase TiO2's Standard card (JCPDS file no.21-1272) mates, and illustrates that product is anatase TiO2;The SEM of embodiment 1 product schemes such as Shown in Fig. 2.
Embodiment 4 yellow TiO2The active testing of catalysis material
By following method, catalysis material of the present invention is carried out the active testing of composite photocatalyst:
Selecting organic dyestuff rhodamine B to evaluate the visible light photocatalysis performance of prepared sample, light source is the xenon of 300W Lamp (with ultraviolet filtering sheet).The whole process of visible light photocatalysis all (transverse section 30cm in glass burns beaker2, high 5cm) carry out.Take 0.1g catalysis material and be distributed to (20mg/L) in the rhodamine B aqueous solution of 100mL.Before illumination, the most black Magnetic agitation 2h under dark condition, makes solution reach absorption/desorption equilibrium, then illumination, samples 5mL every 30min, in centrifuging and taking Layer liquid, with its absorbance of measurement of ultraviolet-visible spectrophotometer.Photocatalytic activity effect is as shown in Figure 3.
Embodiment 5TiO2Photocatalyst Study on mechanism
Use Fourier transformation infrared spectrometer that the infrared spectrum of sample is analyzed.Fig. 4 is embodiment 1 gained The infrared spectrogram of product, as shown in Figure 4, MES-TiO2-OH vibration peak relative to pure TiO2-OH vibration peak to low ripple Number moves (by 3285cm-1It is moved to 3215cm-1), this phenomenon indicates the formation of hydrogen bond.In order to explore the work of hydrogen bond With, inventor is further to MES-TiO2Structural modeling, carried out first-principles calculations, by being calculated following knot Really: MES-TiO2Visible absorption derive from O to the TiO in hydrogen bond2In Ti atom between electron transition.Meanwhile, hole Can be transmitted by O-H-O, cause electronics and hole to efficiently separate.Thus, inventor to think that this hydrogen bond causes good Visible absorption and the separation of effective electron hole be the reason that yellow titanium dioxide has effective visible ray performance.
Although above-described embodiment is made that detailed description to the present invention, but its a part of embodiment that is only the present invention, Rather than whole embodiments, people can also obtain other embodiments according to the present embodiment under without creative premise, these Embodiment broadly falls into scope.

Claims (7)

1. yellow TiO with visible absorption2The preparation method of catalysis material, described method includes:
The presoma of titanium is joined in water/organic two-phase system, carry out hydrothermal synthesis reaction, prepare and there is visible ray suction Yellow TiO received2Catalysis material;
The presoma of described titanium is butyl titanate;
Described water/organic two-phase system is water, ethanol and the mixed system of ethylene glycol monomethyl ether (methyl cellosolve).
Method the most according to claim 1, it is characterised in that the consumption mol ratio of ethanol, ethylene glycol monomethyl ether and water is (10-20): (5-15): 1.
Method the most according to claim 2, it is characterised in that the consumption mol ratio of ethanol, ethylene glycol monomethyl ether and water is 15: 10:1。
Method the most according to claim 1 and 2, it is characterised in that butyl titanate and the volume of water/organic two-phase system Ratio is 1:45-55.
5. a TiO with visible absorption2The preparation method of catalysis material, step is as follows:
(1) ethanol and ethylene glycol monomethyl ether are mixed by a certain percentage, be sufficiently stirred for 3-10min;
(2) a certain amount of deionized water is instilled in the mixed solution of above-mentioned ethanol and ethylene glycol monomethyl ether, be sufficiently stirred for 5-20min;
(3) a certain amount of butyl titanate is added dropwise in above-mentioned mixed solution, stirs 10-30min so that it is mix homogeneously;
(4) mixed solution is transferred in teflon-lined reactor, the baking oven of 160-200 DEG C reacts 12-24h, Natural cooling, washing, dried product;
The consumption mol ratio of described ethanol, ethylene glycol monomethyl ether and water is 15:10:1;
Butyl titanate is 1:(1.5-2 with the volume ratio of water).
6. yellow TiO with visible absorption that any one of claim 1-5 preparation method prepares2Catalysis material.
7. yellow TiO described in claim 62Catalysis material application in degradable organic pollutant.
CN201610368560.1A 2016-05-27 2016-05-27 A kind of yellow TiO with visible absorption performance2The preparation method of catalysis material Expired - Fee Related CN106040211B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110790307A (en) * 2019-11-27 2020-02-14 上海纳米技术及应用国家工程研究中心有限公司 Preparation method of colored titanium dioxide, product and application thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1916235A (en) * 2006-09-06 2007-02-21 浙江大学 Method for preparing composite film of silver Nano granule / titanium dioxide
US20120270028A1 (en) * 2004-04-07 2012-10-25 Kronos International Inc. Titanium dioxide photocatalyst containing carbon and method for its production
US8513158B2 (en) * 2009-06-18 2013-08-20 University Of Central Florida Research Foundation, Inc. Method for forming thermally stable nanoparticles on supports
CN103521204A (en) * 2012-07-06 2014-01-22 中国科学院大连化学物理研究所 Preparation method of strong adsorptive mixed crystal titanium dioxide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120270028A1 (en) * 2004-04-07 2012-10-25 Kronos International Inc. Titanium dioxide photocatalyst containing carbon and method for its production
CN1916235A (en) * 2006-09-06 2007-02-21 浙江大学 Method for preparing composite film of silver Nano granule / titanium dioxide
US8513158B2 (en) * 2009-06-18 2013-08-20 University Of Central Florida Research Foundation, Inc. Method for forming thermally stable nanoparticles on supports
CN103521204A (en) * 2012-07-06 2014-01-22 中国科学院大连化学物理研究所 Preparation method of strong adsorptive mixed crystal titanium dioxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110790307A (en) * 2019-11-27 2020-02-14 上海纳米技术及应用国家工程研究中心有限公司 Preparation method of colored titanium dioxide, product and application thereof

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