CN103599807A - TiO2-BaTaO2N composite photocatalyst and preparation method thereof - Google Patents
TiO2-BaTaO2N composite photocatalyst and preparation method thereof Download PDFInfo
- Publication number
- CN103599807A CN103599807A CN201310644491.9A CN201310644491A CN103599807A CN 103599807 A CN103599807 A CN 103599807A CN 201310644491 A CN201310644491 A CN 201310644491A CN 103599807 A CN103599807 A CN 103599807A
- Authority
- CN
- China
- Prior art keywords
- batao
- tio2
- tio
- mixed solution
- batao2n
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Catalysts (AREA)
Abstract
The invention discloses a TiO2-BaTaO2N composite photocatalyst and a preparation method thereof, and belongs to the field of inorganic functional materials. The technical scheme of the invention comprises that the TiO2-BaTaO2N composite photocatalyst is formed by compositing TiO2 and BaTaO2N, wherein the molar ratio of TiO2 to BaTaO2N is 5-16:1. The invention also discloses the preparation method of the TiO2-BaTaO2N composite photocatalyst. Compared with the prior art, the TiO2-BaTaO2N composite photocatalyst and the preparation method thereof have the following advantages that the composite of TiO2 and BaTaO2N can greatly broaden the spectral response scope of TiO2, so that TiO2 has good absorption in a visible region, and the solar energy utilization rate of TiO2 is improved; the composite of TiO2 and BaTaO2N can effectively reduce the recombination probability of photoproduced electrons and holes, and thus the TiO2 photocatalytic activity is improved; and the method is simple, and is easy to control.
Description
Technical field
The invention belongs to inorganic environment-friendly catalysis material technical field, be specifically related to a kind of TiO
2-BaTaO
2n composite photo-catalyst and preparation method thereof.
Background technology
Along with the raising of social development and people's living standard, the pollution of indoor and outdoor water, air pollution, soil pollution etc. have influence on people's health day by day, and environmental pollution more and more receives people's concern.In numerous environmental contaminants, industrial wastewater because its toxicity is large, concentration is high, the feature such as complicated, biological degradability be poor, general method for treating wastewater is difficult to reach economy and the specification requirement of its purified treatment, and the processing problem of industrial wastewater has become the important problem that current urgent need solves.The photocatalysis technology that the semiconductors such as titanium dioxide of take are catalyst is one of focus of Environmental Studies over nearly 20 years, much research shows its organic wastewater and some inorganic pollution waste water such as degradation of dye waste water, agricultural chemicals waste water, chloride, oily waste water preferably, aspect the improvement of industrial wastewater, is having broad application prospects.
Yet, TiO
2energy gap is 3.2 eV, only under wavelength is less than the ultraviolet ray of 387 nm, just can excite its catalytic activity, and in arriving the solar energy on ground, the energy of this wave band is less than 5% still, has seriously affected its application.In addition TiO,
2photochemical catalyst in photocatalytic process light induced electron and hole easily compound, catalytic efficiency is low.If the nano material of being made into, because its photocatalytic activity of the effects such as quantum size increases really, but blue shift has occurred to the absorption of light, the utilization rate of luminous energy especially solar energy is further reduced.Therefore, how to widen TiO
2photochemical catalyst spectral response range, improve the Focal point and difficult point that its photo-quantum efficiency becomes photocatalysis scientific research.
BaTaO
2n is a kind of transition metal oxynitride, and because divalence oxygen element part is replaced by the less trivalent nitrogen element of electronegativity, metal cation is more or less reduced, and crystal structure changes, BaTaO
2optical, electrical, magnetic that N thereby performance make new advances, mechanical property.Research shows, BaTaO
2the energy gap of N is 2.0 eV, and energy absorbing wavelength is less than the visible ray of 620 nm, is a kind of catalysis material with visible light-responded ability.In order to widen TiO
2spectrum ring scope, by itself and the BaTaO with ideal bandgap
2n is mutually compound, utilizes two kinds of energy level differences between semiconductor can make the photoproduction son that dams be injected on another kind of semi-conductive energy level by a kind of energy level of semiconductive particles, makes electric charge effectively separated, is to improve TiO
2the effective way of solar energy utilization ratio and photo-quantum efficiency.TiO
2the conduction band potential E of photochemical catalyst
cB=-0.29 eV, valence band electromotive force E
vB=2.91 eV, and BaTaO
2the conduction band potential E of N photochemical catalyst
cB=-0.44 eV, valence band electromotive force E
vB=1.56 eV.At TiO
2/ BaTaO
2in N composite semiconductor, BaTaO
2the conduction band potential of N is more negative, and light induced electron is easily from the low BaTaO of energy level
2n conduction band moves to the TiO that energy level is high
2on conduction band, meanwhile, TiO
2valence band electromotive force corrigendum, photohole is easily from the high TiO of energy level
2valence band moves to the BaTaO that energy level is low
2in N valence band, thereby the separation rate of raising photogenerated charge has been expanded TiO
2spectral response range.
Summary of the invention
The technical problem that the present invention solves has been to provide the TiO that a kind of solar energy utilization ratio is high, photocatalytic activity is good
2-BaTaO
2n composite photo-catalyst.
Another technical problem that the present invention solves has been to provide a kind of simple to operate and TiO of being easy to control
2-BaTaO
2the preparation method of N composite photo-catalyst.
Technical scheme of the present invention is: a kind of TiO
2-BaTaO
2n composite photo-catalyst, it is characterized in that by TiO
2with BaTaO
2compound and the TiO that forms of N powder
2-BaTaO
2n composite photo-catalyst, wherein TiO
2with BaTaO
2the mol ratio of N is 5-16:1.
TiO of the present invention
2-BaTaO
2the preparation method of N composite photo-catalyst, it is characterized in that comprising the following steps: (1) by tantalum pentoxide, brium carbonate and acetone in molar ratio the ratio of 1:2:15 join in agate mortar and to grind evenly, then sample is evenly laid on corundum boat, pack in tube-type atmosphere furnace, under ammonia atmosphere, 1000 ℃ of calcinings obtain BaTaO for 20 hours
2n powder; (2) under the condition stirring by the BaTaO of butyl titanate and step (1) gained
2the ratio that N powder is 5-16:1 according to mol ratio joins in absolute ethyl alcohol and forms mixed solution A, and wherein the volume ratio of butyl titanate and absolute ethyl alcohol is 1:2; (3) by red fuming nitric acid (RFNA), water and absolute ethyl alcohol by volume the ratio of 1:2:10 be made into mixed solution B; (4) under the condition stirring, the ratio that is 1:1 according to the volume ratio of absolute ethyl alcohol in mixed solution A and mixed solution B is added drop-wise to mixed solution A by mixed solution B, and hydrolysis forms colloidal sol, continues to stir obtaining gel, and gel is dried to obtain xerogel through 110 ℃; (5) step (4) gained xerogel is transferred in Muffle furnace and after 2 hours, obtained having the TiO of high catalytic activity 450-500 ℃ of maintenance
2-BaTaO
2n composite photo-catalyst.
The present invention compared with prior art has following remarkable advantage: 1, TiO
2with BaTaO
2the compound of N can have been widened TiO greatly
2spectral response range, make TiO
2in visible region, there is good absorption, improved the utilization rate of solar energy; 2, TiO
2with BaTaO
2the compound probability of recombination that can effectively reduce light induced electron and hole of N, improves TiO
2photocatalytic activity; 3, TiO of the present invention
2-BaTaO
2the preparation method of N composite photo-catalyst is simple, easy to control.
Accompanying drawing explanation
Fig. 1 is under the high voltage mercury lamp radiation of 300 W, the TiO that the embodiment of the present invention 1 is prepared
2-BaTaO
2n composite photo-catalyst and commercial TiO
2(P25) correlation curve (operating condition: catalytic amount: 0.5 g/L to methylene blue degraded situation; The concentration of methylene blue: 50 mg/L).
The specific embodiment
Below in conjunction with embodiment, further describe the present invention.Be noted that the present invention is not limited to following each embodiment.
Embodiment 1
(1) tantalum pentoxide, brium carbonate and the acetone that amount of substance is respectively to 0.005mol, 0.01mol, 0.075mol joins in agate mortar and grinds evenly, then sample is evenly laid on corundum boat, pack in tube-type atmosphere furnace, under ammonia atmosphere, 1000 ℃ of calcinings obtain BaTaO for 20 hours
2n powder;
(2) under stirring condition by 17.6mL(0.05mol) butyl titanate and the BaTaO of step (1) gained 0.01mol
2n powder joins in 35.2mL absolute ethyl alcohol and forms mixed solution A;
(3) 3.5mL red fuming nitric acid (RFNA), 7.0mL water and 35.2mL absolute ethyl alcohol are made into mixed solution B;
(4) under the condition stirring, mixed solution B is added drop-wise in mixed solution A, hydrolysis forms colloidal sol, continues to stir obtaining gel, and gel is dried to obtain xerogel through 110 ℃;
(5) step (4) gained xerogel is transferred in Muffle furnace and after 2 hours, obtained having the TiO of high catalytic activity 450 ℃ of maintenances
2-BaTaO
2n composite photo-catalyst.The TiO preparing as seen from Figure 1
2-BaTaO
2n composite photo-catalyst and TiO
2photochemical catalyst is compared has higher degradation rate under identical degradation time, so TiO
2-BaTaO
2n composite photo-catalyst has not only improved photocatalytic activity, has good photocatalysis effect, has also improved the utilization ratio to solar energy simultaneously.
Embodiment 2
(1) tantalum pentoxide, brium carbonate and the acetone that amount of substance is respectively to 0.005mol, 0.01mol, 0.075mol joins in agate mortar and grinds evenly, then sample is evenly laid on corundum boat, pack in tube-type atmosphere furnace, under ammonia atmosphere, 1000 ℃ of calcinings obtain BaTaO for 20 hours
2n powder;
(2) under stirring condition by 35.2mL(0.1mol) butyl titanate and the BaTaO of step (1) gained 0.01mol
2n powder joins in 70.4mL absolute ethyl alcohol and forms mixed solution A;
(3) 7mL red fuming nitric acid (RFNA), 14mL water and 70.4mL absolute ethyl alcohol are made into mixed solution B;
(4) under the condition stirring, mixed solution B is added drop-wise in mixed solution A, hydrolysis forms colloidal sol, continues to stir obtaining gel, and gel is dried to obtain xerogel through 110 ℃;
(5) step (4) gained xerogel is transferred in Muffle furnace and after 2 hours, obtained having the TiO of high catalytic activity 450 ℃ of maintenances
2-BaTaO
2n composite photo-catalyst.
Embodiment 3
(1) tantalum pentoxide, brium carbonate and the acetone that amount of substance is respectively to 0.005mol, 0.01mol, 0.075mol joins in agate mortar and grinds evenly, then sample is evenly laid on corundum boat, pack in tube-type atmosphere furnace, under ammonia atmosphere, 1000 ℃ of calcinings obtain BaTaO for 20 hours
2n powder;
(2) under stirring condition by 56.4mL(0.16mol) butyl titanate and the BaTaO of step (1) gained 0.01mol
2n powder joins in 112.8mL absolute ethyl alcohol and forms mixed solution A;
(3) 11.3mL red fuming nitric acid (RFNA), 22.6mL water and 112.8mL absolute ethyl alcohol are made into mixed solution B;
(4) under the condition stirring, mixed solution B is added drop-wise in mixed solution A, hydrolysis forms colloidal sol, continues to stir obtaining gel, and gel is dried to obtain xerogel through 110 ℃;
(5) step (4) gained xerogel is transferred in Muffle furnace and after 2 hours, obtained having the TiO of high catalytic activity 500 ℃ of maintenances
2-BaTaO
2n composite photo-catalyst.
Above embodiment has described basic principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; do not departing under the scope of the principle of the invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the scope of protection of the invention.
Claims (2)
1. a TiO
2-BaTaO
2n composite photo-catalyst, it is characterized in that by TiO
2with BaTaO
2compound and the TiO that forms of N powder
2-BaTaO
2n composite photo-catalyst, wherein TiO
2with BaTaO
2the mol ratio of N is 5-16:1.
2. a TiO claimed in claim 1
2-BaTaO
2the preparation method of N composite photo-catalyst, it is characterized in that comprising the following steps: (1) by tantalum pentoxide, brium carbonate and acetone in molar ratio the ratio of 1:2:15 join in agate mortar and to grind evenly, then sample is evenly laid on corundum boat, pack in tube-type atmosphere furnace, under ammonia atmosphere, 1000 ℃ of calcinings obtain BaTaO for 20 hours
2n powder; (2) under the condition stirring by butyl titanate and step (1) gained BaTaO
2the ratio that N powder is 5-16:1 according to mol ratio joins in absolute ethyl alcohol and forms mixed solution A, and wherein the volume ratio of butyl titanate and absolute ethyl alcohol is 1:2; (3) by red fuming nitric acid (RFNA), water and absolute ethyl alcohol by volume the ratio of 1:2:10 be made into mixed solution B; (4) under the condition stirring, the ratio that is 1:1 according to the volume ratio of absolute ethyl alcohol in mixed solution A and mixed solution B is added drop-wise to mixed solution A by mixed solution B, and hydrolysis forms colloidal sol, continues to stir obtaining gel, and gel is dried to obtain xerogel through 110 ℃; (5) step (4) gained xerogel is transferred in Muffle furnace and after 2 hours, obtained having the TiO of high catalytic activity 450-500 ℃ of maintenance
2-BaTaO
2n composite photo-catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310644491.9A CN103599807B (en) | 2013-12-05 | 2013-12-05 | A kind of TiO 2-BaTaO 2n composite photo-catalyst and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310644491.9A CN103599807B (en) | 2013-12-05 | 2013-12-05 | A kind of TiO 2-BaTaO 2n composite photo-catalyst and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103599807A true CN103599807A (en) | 2014-02-26 |
| CN103599807B CN103599807B (en) | 2016-03-16 |
Family
ID=50118105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310644491.9A Expired - Fee Related CN103599807B (en) | 2013-12-05 | 2013-12-05 | A kind of TiO 2-BaTaO 2n composite photo-catalyst and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103599807B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004230306A (en) * | 2003-01-31 | 2004-08-19 | Japan Science & Technology Agency | Method for improving activity of photocatalyst consisting of visible light responsive metal nitride and metal oxynitride |
| CN1542998A (en) * | 2003-11-05 | 2004-11-03 | 南京大学 | Porous membrane semiconductor optical electrode having visible light response and photoelectrochemical reaction equipment and preparation thereof |
| CN102698809A (en) * | 2012-05-11 | 2012-10-03 | 沈阳化工大学 | Preparation method of H3PW12O40/ nanometer TiO2 composite photocatalyst |
| CN102947247A (en) * | 2010-03-02 | 2013-02-27 | 特洁安科技有限公司 | Photocatalyst composition of matter |
| US20130213462A1 (en) * | 2012-02-21 | 2013-08-22 | California Institute Of Technology | Axially-integrated epitaxially-grown tandem wire arrays |
-
2013
- 2013-12-05 CN CN201310644491.9A patent/CN103599807B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004230306A (en) * | 2003-01-31 | 2004-08-19 | Japan Science & Technology Agency | Method for improving activity of photocatalyst consisting of visible light responsive metal nitride and metal oxynitride |
| CN1542998A (en) * | 2003-11-05 | 2004-11-03 | 南京大学 | Porous membrane semiconductor optical electrode having visible light response and photoelectrochemical reaction equipment and preparation thereof |
| CN102947247A (en) * | 2010-03-02 | 2013-02-27 | 特洁安科技有限公司 | Photocatalyst composition of matter |
| US20130213462A1 (en) * | 2012-02-21 | 2013-08-22 | California Institute Of Technology | Axially-integrated epitaxially-grown tandem wire arrays |
| CN102698809A (en) * | 2012-05-11 | 2012-10-03 | 沈阳化工大学 | Preparation method of H3PW12O40/ nanometer TiO2 composite photocatalyst |
Non-Patent Citations (2)
| Title |
|---|
| YOUNG-IL KIM，ET AL: "Characterization of the Structural, Optical, and Dielectric Properties of Oxynitride Perovskites AMO2N(A＝Ba, Sr, Ca; M＝Ta, Nb)", 《CHEM. MATER.》, vol. 16, no. 7, 9 March 2004 (2004-03-09), pages 1267 - 1276 * |
| 蒋士芹等: "钙钛矿型 LaFeO3/TiO2复合光催化剂的制备和表征", 《广州化工》, vol. 39, no. 23, 8 December 2011 (2011-12-08), pages 85 - 86 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103599807B (en) | 2016-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Facile fabrication of direct Z-scheme MoS2/Bi2WO6 heterojunction photocatalyst with superior photocatalytic performance under visible light irradiation | |
| Zhao et al. | Facile preparation of dual Z-scheme Bi2O3/g-C3N4/Ag6Si2O7 photocatalyst for highly efficient visible-light photocatalytic degradation of organic pollutants | |
| Shafafi et al. | Carbon dots and Bi4O5Br2 adhered on TiO2 nanoparticles: impressively boosted photocatalytic efficiency for removal of pollutants under visible light | |
| Tian et al. | Mixed-calcination synthesis of CdWO4/g-C3N4 heterojunction with enhanced visible-light-driven photocatalytic activity | |
| Dai et al. | Synthesis of micro-nano heterostructure AgBr/ZnO composite for advanced visible light photocatalysis | |
| CN103212392A (en) | Method for preparing TiO2/kieselguhr composite photocatalytic material by using sol-gel method | |
| Zhang et al. | Enhanced photocatalytic activity of Bi2WO6 doped with upconversion luminescence agent | |
| CN103301833B (en) | Yb<3+>-Tm<3+>-Li<+> triple-doped Bi2WO6/CNTs (carbon nanotubes) upconversion photocatalytic material | |
| CN101502795B (en) | Photocatalysis nano material with energy conversion and preparation method thereof | |
| Hojamberdiev et al. | Er3+-doping induced formation of orthorhombic/monoclinic Bi5O7I heterostructure with enhanced visible-light photocatalytic activity for removal of contaminants | |
| Zhang et al. | CuPc sensitized Bi2MoO6 with remarkable photo-response and enhanced photocatalytic activity | |
| CN103861578A (en) | Rare earth doped nanometer TiO2 photocatalyst emulsion | |
| CN105195131A (en) | Preparation method of graphene quantum dot/vanadium-doped mesoporous titanium dioxide composite photocatalyst | |
| CN104511293A (en) | Bismuth oxychloride-iron bismuth titanate composite photocatalyst and preparation method thereof | |
| CN104096558A (en) | Bi2MoO6-ZnO composite photocatalyst and preparation method thereof | |
| CN104084241A (en) | Titanium dioxide/polyaniline photocatalyst with 3D pattern structure and preparation method of titanium dioxide/polyaniline photocatalyst | |
| CN101791562B (en) | Method for preparing ferrum-fluorine-codoped nano-titanium dioxide visible light photocatalyst | |
| Dhull et al. | An overview on InVO4-based photocatalysts: Electronic properties, synthesis, enhancement strategies, and photocatalytic applications | |
| CN101966450A (en) | High-efficiency composite photocatalyst and preparation method thereof | |
| Cheng et al. | In-situ construction of high-efficiency phase-transition induced m-Bi2O4/Bi4O7 surface heterojunction photocatalysts and mechanism investigation | |
| CN103611560B (en) | TiO2-CaTaO2N composite photocatalyst and preparation method thereof | |
| CN105854912A (en) | BiPO4-WO3 composite photocatalyst and preparation method thereof | |
| CN105771953A (en) | Preparation method of zinc titanate and titanium dioxide composite nano material | |
| CN103191713A (en) | Sn/Ce co-doped TiO2 catalyst and preparation method thereof | |
| Li et al. | Surface-sulfurized Ag2O nanoparticles with stable full-solar-spectrum photocatalytic activity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160316 Termination date: 20161205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |