CN106311209B - The application of Al and Ce codope raising ZnO micro-powder photocatalysis performance - Google Patents
The application of Al and Ce codope raising ZnO micro-powder photocatalysis performance Download PDFInfo
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- 229910052684 Cerium Inorganic materials 0.000 title claims abstract description 34
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 34
- 239000000843 powder Substances 0.000 title claims abstract description 30
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 27
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 24
- 239000011701 zinc Substances 0.000 claims abstract description 34
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 14
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000002708 enhancing effect Effects 0.000 claims abstract description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 6
- 238000010348 incorporation Methods 0.000 claims description 4
- 239000002243 precursor Substances 0.000 claims description 4
- 230000001007 puffing effect Effects 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 abstract description 11
- 238000006731 degradation reaction Methods 0.000 abstract description 11
- 230000003197 catalytic effect Effects 0.000 abstract description 10
- 239000003054 catalyst Substances 0.000 abstract description 8
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 3
- 238000000265 homogenisation Methods 0.000 abstract description 3
- 230000031700 light absorption Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 239000000376 reactant Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 abstract description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 90
- 239000011787 zinc oxide Substances 0.000 description 45
- 239000000243 solution Substances 0.000 description 35
- 239000000463 material Substances 0.000 description 19
- 238000006555 catalytic reaction Methods 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000002957 persistent organic pollutant Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000013019 agitation Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 4
- 229940012189 methyl orange Drugs 0.000 description 4
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 1
- STZCRXQWRGQSJD-UHFFFAOYSA-M sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate Chemical compound [Na+].C1=CC(N(C)C)=CC=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-UHFFFAOYSA-M 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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Abstract
The invention discloses the applications of Al and Ce codope enhancing ZnO micro-powder photocatalysis performance, and by collosol and gel standard measure cerium solution, zinc solution and aluminum nitrate solution are then mixed (Zn according to different proportion0.97‑XCe0.03AlXO, X=0.00,0.02,0.04,0.06,0.08,0.10), with the increase of Al doping concentration, Zn0.97‑XCe0.03AlXThe SEM photograph of O system analysis shows, the raising of the homogenization of sample particle size and dispersion performance is beneficial to the suspended dispersed of catalyst after doping, while also can promote catalyst to the absorption of light and the absorption of reactant molecule, keeps the photocatalysis performance of sample more preferable；It is clear that with Al3+The increase of volume, the photocatalysis efficiency of ZnO sample, which has, obviously to be improved, especially in Zn0.87Ce0.03Al0.10In the case where O, illumination 4 minutes, the catalytic efficiency of sample just reached close to 85%, and degradation rate changes with time figure close to straight line, and the figure line slope that overall light catalytic rate changes over time is very big, and photocatalysis efficiency is excellent.
Description
Technical field
The invention belongs to field of semiconductor materials, and in particular to Al and Ce codope improves ZnO micro-powder photocatalytic
The application of energy.
Background technique
The new era of 21 century, we also cause threat to environment while social development productivity energetically.With
Industrialization, modernization are constantly accelerated, and a large amount of toxic organics have been discharged in water and air, have been enriched in human body
Seriously threaten people's health.And majority of organic pollutants is difficult to be degraded with common method, therefore, developing a kind of simplicity has
It is one urgent problem to be solved of human society that the method for effect, which carrys out degradable organic pollutant,.It semiconductor light-catalyst and its is urged in light
The application in change field is the most viable scheme of current degradable organic pollutant.As a kind of method of novel process pollutant, light
Catalytic degradation technology due to easy to operate, nontoxic, energy saving, the service life is long, reaction condition is mild, secondary pollution will not be generated and by
It is widely used.Wide bandgap semiconductor materials such as ZnSe and GaN are active in always forefront in recent years.Recently, another broad-band gap half
Conductor material oxidation zinc (ZnO) similarly causes the concern of people.
ZnO is important II-VI group conductor oxidate and one as a kind of novel third generation semiconductor material
Kind there is the direct band gap semiconductor material with wide forbidden band of piezoelectricity and photoelectric characteristic, in addition, ZnO due to cheap, plasticity is strong,
The series of advantages such as quantum effect height make it be preferably applied for organic pollutant degradation.Micron ZnO has structure abundant, this
A little nanostructures show characteristic not available for many tradition ZnO, become field of semiconductor materials often due to size is small
One of research hotspot.Forbidden bandwidth at room temperature is about 3.37eV, and the photon wavelength launched is in black light wave band,
Exciton bind energy is up to 60meV, much higher than ionization energy 26meV provided by room temperature thermal excitation, enables the exciton of ZnO in room
It is stabilized under temperature.Therefore, ZnO material low excitation threshold and greater efficiency easy to accomplish at room temperature or under higher temperature
Laser emission.
Therefore, we are badly in need of exploring a kind of simple process for improving ZnO photocatalysis performance, at the same can guarantee it is at low cost,
Easy to operate, time-consuming short, efficient characteristic.
Summary of the invention
For the defects in the prior art and insufficient, Ce and Al codope is entered ZnO microns by research discovery by the present invention
The raising of the homogenization and dispersion performance of sample particle size is conducive to the suspended dispersed of catalyst after in powder, while can also promote
Into catalyst to the absorption of light and the absorption of reactant molecule, realize the photocatalysis performance of sample more preferably to organic pollutant
Degradation rapidly and efficiently.
The technical scheme adopted by the invention is as follows:
The application of Al and Ce codope enhancing ZnO micro-powder photocatalysis performance.
Specifically, the photocatalysis performance that will enhance ZnO micro-powder in Al and Ce incorporation ZnO micro-powder, it is micro- that Ce accounts for ZnO
The mole percent of rice flour body is that the mole percent that 3%, Al accounts for ZnO micro-powder is 0~10%.
The photocatalysis performance of ZnO micro-powder will be enhanced in Al and Ce incorporation ZnO micro-powder, Ce accounts for ZnO micro-powder
Mole percent be the mole percent that 3%, Al accounts for ZnO micro-powder be 2~10%.
Further, by Al and Ce incorporation ZnO micro-powder in method include: by cerium solution, zinc solution, aluminum solutions and
Colloidal sol is formed after citric acid solution mixing；Precursor is formed after colloidal sol dehydration, precursor is obtained by sintering doped with Al and Ce
ZnO micro-powder.
Specifically, cerium solution, zinc solution and aluminum solutions are according to Zn0.97-XCe0.03AlXO, X=0.00,0.02,0.04,
0.06,0.08 or 0.10 molar ratio mixing, concentration of the citric acid in colloidal sol is 0.3mol/L.
In addition, the sintering temperature is 400 DEG C, sintering time 2h.
In addition, the colloidal sol forms xerogel in 80 DEG C of drying 13h, xerogel keeps the temperature 9h dewatering and puffing at 130 DEG C
Obtain presoma；Presoma pulverize it is last at 400 DEG C be sintered 2h obtain ZnO micro-powder.
The advantages and positive effects of the present invention are as follows:
(1) zinc solution and aluminum nitrate solution are mixed (Zn according to different proportion by the present invention0.97-XCe0.03AlXO, X=0.00,
0.02,0.04,0.06,0.08,0.10), with the increase of Al doping concentration, Zn0.97-XCe0.03AlXThe SEM photograph of O system point
Analysis shows that the homogenization of sample particle size and the raising of dispersion performance after doping are beneficial to the suspended dispersed of catalyst, together
When also can promote catalyst to the absorption of light and the absorption of reactant molecule, keep the photocatalysis performance of sample more preferable；
(2) it is clear that with Al3+The photocatalysis efficiency of the increase of volume, ZnO sample has obviously
It improves, especially in Zn0.87Ce0.03Al0.10In the case where O, illumination 4 minutes, the catalytic efficiency of sample just reached close
85%, and degradation rate changes with time figure close to straight line, and the figure line slope that overall light catalytic rate changes over time is very
Greatly, photocatalysis efficiency is excellent；
(3) the features such as sol-gal process of the present invention has easy to operate, at low cost, reacts and is easy to carry out, and required temperature is low,
It is this to realize the quickly and effectively degradation to organic pollutant methyl orange by two kinds of element codope zinc oxide of Ce and Al
Simple and effective photocatalytic degradation method is expected to push the research and application of catalysis material.
Detailed description of the invention
FIG. 1 to FIG. 6 is successively the X ray diffracting spectrum of the zinc oxide micrometer material of embodiment one to six；
Fig. 7~Figure 12 is successively that the zinc oxide micrometer material of embodiment one to six amplifies 5000 times (left sides) and 10000 times
The scanning electron microscope diagram on (right side)；
Figure 13~Figure 15 is the zinc oxide micrometer material light catalysis agent section degradation rate figure at any time of embodiment one to six；
Figure 16 is the zinc oxide micrometer material light catalysis agent section degradation rate figure at any time of comparative example one；
The present invention is illustrated below in conjunction with Figure of description and specific implementation formula.
Specific embodiment
The purpose of the present invention is intended to provide a kind of controllable growth technique for enhancing ZnO optical property, mainly uses colloidal sol
The aluminium doping of various concentration is entered ZnO nano material by gel method, and the doping concentration by adjusting aluminium effectively controls ZnO light
Catalytic performance, the shortcomings that overcoming the prior art and difficulty, this method that can simply and effectively enhance optical property are expected to
Push the research and application of catalysis material.
By changing the doping concentration with aluminium element, the aluminium for realizing various concentration adulterates the preparation of ZnO micro-powder, with
Al3+The increase of volume, the photocatalytic speed of ZnO sample, which has, obviously to be reinforced, and overall degradation rate is at any time
For variation diagram close to straight line, the figure line slope that overall light catalytic rate changes over time is very big, light-catalyzed reaction occur rapidly and
Obviously, and with Al3+The increase of volume does not have a declining tendency, so it is pole that visible Al and Ce, which are co-doped with ZnO micro-powder,
For ideal catalysis material.
The present invention is illustrated with reference to embodiments:
Embodiment one:
The preparation method of the nano zinc oxide material of the present embodiment includes:
Step 1: the Zn (NO that molar concentration is 0.1mol/L is prepared respectively3)2·6H2O, molar concentration is 0.1mol/L's
Al(NO3)2·6H2O, concentration is the Ce (NO of 0.1mol/L3)3·12H2O, molar concentration is the C of 0.3mol/L6H8O7·H2O is molten
Liquid distinguishes three kinds of solution magnetic agitation 30 minutes；
Step 2: quantitative cerous nitrate solution, then by zinc nitrate solution and aluminum nitrate solution according to Zn0.97Ce0.03The ratio of O
Example mixing, mixes magnetic agitation 3 hours with prepared citric acid solution for mixed solution, to form colloidal sol, colloidal sol
The concentration of middle citric acid is 0.3mol/L.
Step 3: colloidal sol is put into 80 DEG C of drying boxes and keeps the temperature 13 hours, to form xerogel.Xerogel is put into
9 hours are kept the temperature in 130 DEG C of drying boxes, obtains presoma to dewatering and puffing；
Step 4: presoma is fully ground in the agate mortar to powder, is finally putting into 400 DEG C of Muffle furnaces and is sintered 2
Hour, powder sample is obtained, it is to be measured.
Embodiment two:
The present embodiment is unlike embodiment one: quantitative cerium solution, then by zinc solution with 95% and cerous nitrate solution
3% proportionally mixes (Zn0.95Ce0.03Al0.02O)。
Embodiment three:
The present embodiment is unlike embodiment one: quantitative cerium solution, then by zinc solution with 93% and aluminum nitrate solution
4% proportionally mixes (Zn0.93Ce0.03Al0.04O)。
Example IV:
The present embodiment is unlike embodiment one: quantitative cerium solution, then by zinc solution with 91% and aluminum nitrate solution
6% proportionally mixes (Zn0.91Ce0.03Al0.06O)。
Embodiment five:
The present embodiment is unlike embodiment one: quantitative cerium solution, then by zinc solution with 89% and aluminum nitrate solution
8% proportionally mixes (Zn0.89Ce0.03Al0.08O)。
Embodiment six:
The present embodiment is unlike embodiment one: quantitative cerium solution, then by zinc solution with 87% and aluminum nitrate solution
10% proportionally mixes (Zn0.87Ce0.03Al0.10O)。
Zinc oxide micrometer piece difference structure, pattern and the photocatalysis that embodiment one, two, three, four, five and six is prepared
Performance is tested, the methyl orange solution that photocatalysis is 20mg/L using photocatalytic degradation concentration, with Al3+Volume is successively
For 0%, 2%, 4%, 6%, 8%, 10% ZnO sample as photochemical catalyst, the dosage of methyl orange is 20ml, uses xenon source
Prolonged exposure, light application time are to differ within one to six minutes every time, are taken four times, methyl orange concentration 20mg/L.
(1) X ray diffracting spectrum (see Fig. 1-Fig. 6) of the zinc oxide micrometer material of various concentration aluminium of the present invention doping and
The local contrast figure (Fig. 7) of six groups of characteristic peaks shows that the sample products prepared are the oxidation of hexagonal crystal system wurtzite structure
The peak type of zinc, these peaks is sharp, and half-peak breadth is relatively narrow, shows that sample has very high crystallinity, while going out before three strongest peak
The weaker impurity peaks of intensity are showed, still, with the increase of Al element doping concentration, impurity peak intensity gradually weakens, when Al mixes
When miscellaneous concentration reaches 10%, impurity peaks disappear.
Fig. 8-Figure 12 is the scanning electron microscope diagram that sample amplifies 5000 times of (left sides) and 10000 times (right side) respectively, comprehensive
The SEM photograph of the above sample analysis shows, doping has an impact to the pattern of ZnO, with the increase of Al doping concentration, the shape of sample
Looks gradually become the laminated structure with hole by graininess, in addition, the dispersibility of sample also improves.
(3) present invention is clear that by the doping concentration of change aluminium with Al3+The increase of volume, Zn0.97- XCe0.03AlXThe photocatalytic speed of O sample, which has, obviously to be improved, especially in the molar concentration 3% of Ce and Al codope
(Zn in the case where with 10%0.87Ce0.03Al0.10O), the degradation rate of 4 minutes light application time methyl orange solutions has just reached close
85%, and overall degradation rate changes with time figure close to straight line, and the figure line that overall light catalytic rate changes over time is oblique
Rate is very big, and photocatalysis efficiency is very high, and therefore, it is excellent catalysis material that Al and Ce, which are co-doped with ZnO micron chip, such as the following figure (figure
13- Figure 15).
Comparative example one:
The preparation method of the zinc oxide micrometer material of the present embodiment includes:
Step 1: the Zn (NO that molar concentration is 0.1mol/L is prepared respectively3)2·6H2O, molar concentration is 0.1mol/L's
Cu(NO3)2·3H2O, concentration is the Ce (NO of 0.1mol/L3)3·12H2O, molar concentration is the C of 0.3mol/L6H8O7·H2O is molten
Liquid distinguishes three kinds of solution magnetic agitation 30 minutes；
Step 2: copper solution accounts for 3%, then proportionally mixes zinc solution with 87% and cerous nitrate solution 10%
(Zn0.97Cu0.03O), mixed solution is mixed with prepared citric acid solution, it is magnetic agitation 3 hours, molten to be formed
Glue, the concentration of citric acid is 0.3mol/L in colloidal sol.
Step 3: colloidal sol is put into 80 DEG C of drying boxes and keeps the temperature 13 hours, to form xerogel.Xerogel is put into
Heat preservation heat preservation 9 hours, obtain presoma to dewatering and puffing in 130 DEG C of drying boxes；
Step 4: presoma is fully ground in the agate mortar to powder, is finally putting into 400 DEG C of Muffle furnaces and is sintered 2
Hour, powder sample is obtained, it is to be measured.
Photocatalysis performance the result is shown in Figure 16, Zn0.87Cu0.03Ce0.10The photocatalysis performance curve graph of O sample, result table in figure
Bright, after Cu and Ce doping, with the extension of photocatalysis time, catalytic efficiency is improved, but the ZnO sample with Al and Ce codope
The photocatalysis performance of product is compared, and efficiency does not have the good of the sample of Al and Ce codope ZnO, the sample photocatalysis 4 of Cu and Ce doping
Hour, catalytic efficiency has just reached 50% or so, and the catalysis of the ZnO micro materials of Al and Ce codope in minutes is imitated
Fruit is all better than the Cu and Ce sample adulterated.
Claims (1)
- The application of 1.Al and Ce codope enhancing ZnO micro-powder photocatalysis performance, which is characterized in that Al and Ce is mixed into ZnO Enhance the photocatalysis performance of ZnO micro-powder in micro-powder, the mole percent that Ce accounts for ZnO micro-powder is that 3%, Al is accounted for The mole percent of ZnO micro-powder is 10%；It include: to mix cerium solution, zinc solution, aluminum solutions and citric acid solution by the method in Al and Ce incorporation ZnO micro-powder Colloidal sol is formed after conjunction；Precursor is formed after colloidal sol dehydration, precursor obtains the ZnO powder and micron doped with Al and Ce by sintering Body；Cerium solution, zinc solution and aluminum solutions are according to Zn0.97-XCe0.03AlXThe molar ratio of O, X=0.10 mix, and citric acid is molten Concentration in glue is 0.3mol/L；The colloidal sol forms xerogel in 80 DEG C of drying 13h, and xerogel keeps the temperature 9h dewatering and puffing at 130 DEG C and obtains forerunner Body；Presoma pulverize it is last at 400 DEG C be sintered 2h obtain ZnO micro-powder.
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| CN104650857A (en) * | 2015-01-30 | 2015-05-27 | 长安大学 | Application of copper ions for enhancing visible light emission intensity of ZnO nanometer material |
| CN104971708A (en) * | 2015-07-03 | 2015-10-14 | 陕西科技大学 | Ce-doped spherical ZnO photocatalyst applicable to treatment of dye wastewater and preparation method thereof |
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| CN104650857A (en) * | 2015-01-30 | 2015-05-27 | 长安大学 | Application of copper ions for enhancing visible light emission intensity of ZnO nanometer material |
| CN104971708A (en) * | 2015-07-03 | 2015-10-14 | 陕西科技大学 | Ce-doped spherical ZnO photocatalyst applicable to treatment of dye wastewater and preparation method thereof |
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| Title |
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| Synthesis and characterization of Al-Y co-doped ZnO powders with high photocatalytic properties;JIA HONG ZHENG et al.;《OPTOELECTRONICS AND ADVANCED MATERIALS–RAPID COMMUNICATIONS》;20160430;第222–227页 |
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