CN101856611A - Novel high-activity indium borate photo-catalyst - Google Patents
Novel high-activity indium borate photo-catalyst Download PDFInfo
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- CN101856611A CN101856611A CN 201010196377 CN201010196377A CN101856611A CN 101856611 A CN101856611 A CN 101856611A CN 201010196377 CN201010196377 CN 201010196377 CN 201010196377 A CN201010196377 A CN 201010196377A CN 101856611 A CN101856611 A CN 101856611A
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Abstract
The invention discloses a novel high-activity indium borate photo-catalyst, which has a chemical formula of InBO3. The high-activity indium borate photo-catalyst which is a hexagonal system is prepared by using an indium salt, a boron-containing compound and an alkaline compound as precursors, adding a diluent and adopting a co-precipitation method. The high-activity indium borate photo-catalyst has the characteristics of high dispersibility, high stability, high photo-catalytic activity and the like and has photo-catalytic efficiency far beyond pure TiO2. The research achievement creates a new way for the design and preparation of the novel high-efficiency photo-catalyst and the application of the novel high-efficiency photo-catalyst in the field of environment purification.
Description
[technical field]
The present invention finds and develops a kind of " novel high-activity indium borate photo-catalyst ", and this catalyst has excellent photocatalysis performance, and its photocatalysis efficiency far surpasses pure TiO
2The invention belongs to the photocatalysis technology field, be mainly used in depollution of environment field, provide a kind of novel high-activity indium borate photo-catalyst for utilizing the pollutant in photocatalysis technology degradation water and the atmosphere.
[background technology]
World today's energy crisis and ecological deterioration force people to seek the more new method of cleaning, reproducible new forms of energy and improvement environment.In recent years, the research to catalysis material has obtained remarkable progress.Fujishima and Honda found titanium dioxide (TiO in 1972
2) electrode can make water decompose at normal temperatures under the effect of black light and produce hydrogen and oxygen, started the heterogeneous light-catalysed research of semiconductor.Compare TiO with other catalyst
2Have better relative higher characteristics of stability with photocatalysis efficiency, but for degraded atmosphere and water pollutant, TiO
2Photocatalysis efficiency do not reach requirement of actual application as yet, still exist problems such as the low and depollution of environment effect difference of photocatalysis efficiency.
Boric acid indium (InBO
3) be a kind of wide bandgap semiconductor of excellent performance, energy gap is 3.26eV, owing to its good physics and chemical characteristic are widely studied and applied.The boric acid indium of doped with rare-earth elements has good fluorescent characteristic, as Eu
3+Doping InBO
3At cathode-ray and the ultraviolet ray excited fluorescence of launching redness down, die-away time, 10ms was mainly used in television picture tube; Tb
3+Doping InBO
3At cathode-ray and the ultraviolet ray excited yellow-green fluorescence that issues, luminous peak wavelength 550nm, die-away time, (10%) 15ms mainly was used as monochromatic display tube, as the terminal display.Relevant patent is as: cathode-ray tube (application number: 85102041, Dutch N.V. Philips' optical lamp manufacturing company); Cathode-ray tube (application number: 86100953, authorize Dutch N.V. Philips' optical lamp manufacturing company) with luminous ortho-boric acid indium.
While InBO
3Also be a kind of photochemical catalyst, be with a wide range of applications in depollution of environment field.But, present InBO
3Research work at photocatalytic degradation atmosphere and water pollutant does not appear in the newspapers as yet.The present invention finds in the research of photocatalytic degradation atmosphere and water pollutant, InBO
3Have excellent photocatalysis performance, and develop " novel high-activity indium borate photo-catalyst ".This catalyst is a hexagonal crystal system, has characteristics such as good dispersion, stability are strong, photocatalytic activity height, and its photocatalysis efficiency has surpassed pure TiO
2, this achievement in research will be for designing, prepare new and effective photochemical catalyst and opening up new direction in the application in depollution of environment field.
[summary of the invention]
The present invention is a presoma with indium salt, boron-containing compound and alkali compounds, adds diluent, adopts coprecipitation to prepare high-activity indium borate photo-catalyst.The invention has the advantages that: find and develop a kind of " novel high-activity indium borate photo-catalyst ", this catalyst good dispersion, stability is strong, has excellent photocatalysis performance, and its photocatalysis efficiency far surpasses pure TiO
2This is because the energy gap of boric acid indium is 3.26eV, can effectively utilize the ultraviolet degradation organic pollutant molecule, show that indium borate photo-catalyst has remarkable efficacy aspect the depollutions of environment such as degradation of organic substances pollution, will be for designing, prepare new and effective photochemical catalyst and opening up new direction in the application in depollution of environment field.
[description of drawings]
The X ray diffracting spectrum of Fig. 1 embodiment 1,2,3;
The ultraviolet catalytic degraded parachlorophenol curve of Fig. 2 embodiment 1,2,3 is (with no photochemical catalyst, pure TiO
2Relatively).
Below in conjunction with specific embodiments and the drawings the present invention is described further, and specifies photocatalysis effect of the present invention.
[specific embodiment]
Concrete preparation method of the present invention is as follows: 1. at normal temperatures, a certain amount of indium salting liquid is added diluent, stirred 15 minutes; The volume ratio of diluent and indium salting liquid is 2: 1--10: 1; 2. a certain amount of boron-containing compound is added above-mentioned reaction system, fully stir and it was dissolved fully in 15 minutes; The mol ratio of indium salt and boron-containing compound is 1: 5--1: 1; 3. add a certain amount of alkaline compound solution to system, the mol ratio of indium salt and alkali compounds is 1: 15--1: 3; At room temperature vigorous stirring 2--8 hour, obtain white depositions, left standstill under the room temperature 1-5 days; 4. with this sediment through 70 ℃--120 ℃ of oven dry, grind into powder, in air atmosphere 400 ℃--1100 ℃ of calcinings 2.0--5.0 hour; 5. with high purity water washing 3--5 time, through 70 ℃--grind once more after 120 ℃ of oven dry, promptly make high-activity indium borate photo-catalyst.
In the above preparation process, described indium salt can be any in inidum chloride, indium nitrate or the indium acetate.
Described boron-containing compound can be any in boric acid, borax, Boratex, potassium borate, ammonium borate, metaboric acid, kodalk, potassium metaborate, tetraboric acid, sodium tetraborate or the dipotassium tetraborate.
Described alkali compounds can be any in NaOH, potassium hydroxide or the ammoniacal liquor.
Described diluent can be any or several mixing in high purity water, methyl alcohol, ethanol, propyl alcohol, isopropyl alcohol, ethylene glycol, four butanols; Preferred high purity water and absolute ethyl alcohol.
The evaluation method of photocatalytic activity: as outer irradiation source, radiation wavelength is λ＞320nm with the Philips HPA 400/30S lamp of 400W; Catalyst amount is 10mg; Reactor is apart from light source 15cm; 40mL concentration is 50 * 10
-6The parachlorophenol solution of mol/L is as the target degradation product; Logical O in the parachlorophenol solution
2Amount is 6mL/min; Solution concentration and temperature balance in the magnetic agitation maintenance system, the air-cooled maintenance reaction temperature of fan is in [(25 ± 2) ℃]; Get the centrifugation of 1.5mL reactant liquor every 15min, get supernatant liquor, replace the pyrrole quinoline as developer, measure the parachlorophenol solution concentration, demarcate the photocatalytic activity of catalyst with ultraviolet-visible spectrophotometer (UV-16PC, Tianjin, island company) with 4-amino ammonia.
For a better understanding of the present invention, the present invention is described in further detail, but the scope of protection of present invention is not limited to the represented scope of embodiment below in conjunction with embodiment.
Embodiment 1
At normal temperatures, measure the 50mL high purity water and place on the magnetic stirring apparatus and stir, add 5mL indiumchloride solution (5 * 10
-3Mol), stirred 15 minutes; With 720mg boric acid (1.16 * 10
-2Mol) adding system fully stirs and it was dissolved fully in 15 minutes; Adding 3mL concentration is 25% ammoniacal liquor (4 * 10
-2Mol); At room temperature vigorous stirring is 4 hours, obtains white depositions, leaves standstill under the room temperature 1 day; This sediment is placed in the baking oven 100 ℃ of bakings 10 hours with evaporating solvent, use the agate mortar grind into powder, put into crucible and calcined 2.5 hours at 450 ℃ of air atmospheres of Muffle furnace; With high purity water washing 3 times, after 100 ℃ of oven dry, grind once more, promptly obtain high-activity indium borate photo-catalyst Y1.In this catalyst, InBO
3Mass crystallization also is hexagonal crystal system, and average grain diameter is 16.2nm, and specific area is 4.8m
2/ g.With above-mentioned photocatalytic activity evaluation method, under ultraviolet excitation, the degradation rate of parachlorophenol is 72% after 1 hour.
Embodiment 2
At normal temperatures, measure the 50mL high purity water and place on the magnetic stirring apparatus and stir, add 5mL indiumchloride solution (5 * 10
-3Mol), stirred 15 minutes; With 720mg boric acid (1.16 * 10
-2Mol) adding system fully stirs and it was dissolved fully in 15 minutes; Add 15mL sodium hydroxide solution (1mol/L); At room temperature vigorous stirring is 4 hours, obtains white depositions, leaves standstill under the room temperature 1 day; This sediment is placed in the baking oven 100 ℃ of bakings 10 hours with evaporating solvent, use the agate mortar grind into powder, put into crucible and calcined 2.5 hours at 650 ℃ of air atmospheres of Muffle furnace; With high purity water washing 3 times, after 100 ℃ of oven dry, grind once more, promptly obtain high-activity indium borate photo-catalyst Y2.In this catalyst, InBO
3Mass crystallization also is hexagonal crystal system, and average grain diameter is 47.3nm, and specific area is 3.9m
2/ g.With above-mentioned photocatalytic activity evaluation method, under ultraviolet excitation, the degradation rate of parachlorophenol is 67.3% after 1 hour.
Embodiment 3
At normal temperatures, measure the 50mL high purity water and place on the magnetic stirring apparatus and stir, add 5mL indiumchloride solution (5 * 10
-3Mol), stirred 15 minutes; With 720mg boric acid (1.16 * 10
-2Mol) adding system fully stirs and it was dissolved fully in 15 minutes; Add 15mL sodium hydroxide solution (1mol/L); At room temperature vigorous stirring is 4 hours, obtains white depositions, leaves standstill under the room temperature 1 day; This sediment is placed in the baking oven 100 ℃ of bakings 10 hours with evaporating solvent, use the agate mortar grind into powder, put into crucible and calcined 2.5 hours at 800 ℃ of air atmospheres of Muffle furnace; With high purity water washing 3 times, after 100 ℃ of oven dry, grind once more, promptly obtain high-activity indium borate photo-catalyst Y3.In this catalyst, InBO
3Highly crystalline also is hexagonal crystal system, and average grain diameter is 52.8nm, and specific area is 1.0m
2/ g.With above-mentioned photocatalytic activity evaluation method, under ultraviolet excitation, the degradation rate of parachlorophenol is 96% after 1 hour.And on year-on-year basis under the condition, pure TiO
2Degradation rate to parachlorophenol is 66%.This shows InBO
3Photochemical catalyst and pure TiO
2Compare, along with InBO
3The increase of calcining heat, organic pollutant molecule have significantly been improved InBO by efficient degradation
3The ultraviolet catalytic efficient of photochemical catalyst is (than pure TiO
2Ultraviolet catalytic efficient improved nearly 0.5 times).
Comparative Examples 1
For carrying out the activity contrast, in implementation process, prepared a comparative sample pure titinium dioxide (TiO
2-pure).At normal temperatures, measuring the 40mL absolute ethyl alcohol places on the magnetic stirring apparatus and stirs; Add 1mL hydrochloric acid (analyzing pure) and 1mL high purity water and fully stirring successively; Slowly splash into 12mL concentration and be 98% butyl titanate (3.46 * 10
-2Mol), vigorous stirring 4 hours under the room temperature still aging 1 day, obtains gel; This gel is placed in the baking oven 100 ℃ of bakings 10 hours with evaporating solvent, use the agate mortar grind into powder, put into crucible and calcined 2.5 hours, promptly obtain nano level pure TiO at 450 ℃ of air atmospheres of Muffle furnace
2Photochemical catalyst.In this catalyst, TiO
2Be the anatase phase, its specific area is 63.8m
2/ g.With above-mentioned photocatalytic activity evaluation method, under ultraviolet excitation, degradation rate is 66% after 1 hour.
Claims (5)
1. the present invention finds and develops a kind of " novel high-activity indium borate photo-catalyst ", and its chemical formula is InBO
3It is characterized in that: with indium salt, boron-containing compound and alkali compounds be presoma, to add diluent, adopt the high-activity indium borate photo-catalyst of coprecipitation preparation be hexagonal crystal system, have characteristics such as good dispersion, stability are strong, photocatalytic activity height, its photocatalysis efficiency has surpassed pure TiO
2
2. high-activity indium borate photo-catalyst according to claim 1 is characterized in that: described indium salt can be any in inidum chloride, indium nitrate or the indium acetate.
3. high-activity indium borate photo-catalyst according to claim 1 is characterized in that: described boron-containing compound can be any in boric acid, borax, Boratex, potassium borate, ammonium borate, metaboric acid, kodalk, potassium metaborate, tetraboric acid, sodium tetraborate or the dipotassium tetraborate.
4. high-activity indium borate photo-catalyst according to claim 1 is characterized in that: described alkali compounds can be any in NaOH, potassium hydroxide or the ammoniacal liquor.
5. high-activity indium borate photo-catalyst according to claim 1 is characterized in that: described diluent can be any or several mixing in high purity water, methyl alcohol, ethanol, propyl alcohol, isopropyl alcohol, ethylene glycol, four butanols; Preferred high purity water and absolute ethyl alcohol.
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| CN 201010196377 CN101856611A (en) | 2010-06-10 | 2010-06-10 | Novel high-activity indium borate photo-catalyst |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091611A (en) * | 2010-12-30 | 2011-06-15 | 南开大学 | Novel high-activity indium borate composite nitrogen-doped titanium dioxide photocatalyst |
| CN104437505A (en) * | 2014-12-28 | 2015-03-25 | 桂林理工大学 | Visible light responded photocatalyst LiFeB2O5 and preparation method thereof |
| CN104492419A (en) * | 2014-12-28 | 2015-04-08 | 桂林理工大学 | Visible light responding photocatalyst LiBi3B3O11 and preparation method thereof |
| CN104525208A (en) * | 2014-12-28 | 2015-04-22 | 桂林理工大学 | Photocatalyst LiFe2B3O8 with visible light response and preparation method thereof |
| CN104645992A (en) * | 2014-11-30 | 2015-05-27 | 桂林理工大学 | Photocatalyst Li3Cu2BO5 with visible-light response and preparation method thereof |
-
2010
- 2010-06-10 CN CN 201010196377 patent/CN101856611A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 《Acta Crystallographica Section C》 19941231 James R.Cox et al. InBO3 第1857页右栏第10行-第1858页第9行，fig.2 1-5 第50卷, 2 * |
| 《Russian Journal of Inorganic Chemistry》 20051231 E.A.Tkachenko et al. Synthesis of Nanocrystalline Indium Orthoborate through Borate Rearrangement 参见682页右栏倒数第2行-683页左栏第28行,参见684页左栏第22-25行 1-5 第50卷, 第5期 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091611A (en) * | 2010-12-30 | 2011-06-15 | 南开大学 | Novel high-activity indium borate composite nitrogen-doped titanium dioxide photocatalyst |
| CN104645992A (en) * | 2014-11-30 | 2015-05-27 | 桂林理工大学 | Photocatalyst Li3Cu2BO5 with visible-light response and preparation method thereof |
| CN104437505A (en) * | 2014-12-28 | 2015-03-25 | 桂林理工大学 | Visible light responded photocatalyst LiFeB2O5 and preparation method thereof |
| CN104492419A (en) * | 2014-12-28 | 2015-04-08 | 桂林理工大学 | Visible light responding photocatalyst LiBi3B3O11 and preparation method thereof |
| CN104525208A (en) * | 2014-12-28 | 2015-04-22 | 桂林理工大学 | Photocatalyst LiFe2B3O8 with visible light response and preparation method thereof |
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Open date: 20101013 |