CN112403467A - TiO2Co-doped composite photocatalyst, preparation method thereof and application thereof in treating phenol-containing wastewater - Google Patents
TiO2Co-doped composite photocatalyst, preparation method thereof and application thereof in treating phenol-containing wastewater Download PDFInfo
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 56
- 239000002131 composite material Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000002351 wastewater Substances 0.000 title abstract description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 title abstract description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 19
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 18
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910001981 cobalt nitrate Inorganic materials 0.000 claims abstract description 13
- 239000011259 mixed solution Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000007864 aqueous solution Substances 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229960000583 acetic acid Drugs 0.000 claims abstract description 9
- 239000012362 glacial acetic acid Substances 0.000 claims abstract description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 8
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001354 calcination Methods 0.000 claims abstract description 7
- 229910021642 ultra pure water Inorganic materials 0.000 claims abstract description 5
- 239000012498 ultrapure water Substances 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 3
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical group CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 claims description 33
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims description 31
- 230000015556 catabolic process Effects 0.000 claims description 21
- 238000006731 degradation reaction Methods 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002957 persistent organic pollutant Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims description 4
- 239000000356 contaminant Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000001699 photocatalysis Effects 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 2
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000002835 absorbance Methods 0.000 description 4
- 230000000593 degrading effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000004408 titanium dioxide Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000000975 co-precipitation Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000003760 magnetic stirring Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000006552 photochemical reaction Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- ZCYXXKJEDCHMGH-UHFFFAOYSA-N nonane Chemical compound CCCC[CH]CCCC ZCYXXKJEDCHMGH-UHFFFAOYSA-N 0.000 description 1
- BKIMMITUMNQMOS-UHFFFAOYSA-N normal nonane Natural products CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- -1 oxygen free radical Chemical class 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 238000001782 photodegradation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
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- B01J35/39—
-
- 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
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
- B01J23/75—Cobalt
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention discloses TiO2Co-doped composite photocatalyst, preparation method thereof and application thereof in treating phenol-containing wastewater. The method comprises the following steps: slowly dripping tetrabutyl titanate into absolute ethyl alcohol, and violently stirring for 30-60 min at room temperature to obtain a mixed solution A; taking absolute ethyl alcohol, glacial acetic acid, concentrated nitric acid and cobalt nitrate aqueous solution, and uniformly stirring to obtain a mixed solution B; dropwise adding the mixed solution B into the mixed solution A, stirring, standing for precipitation, washing the obtained solid with ultrapure water and absolute ethyl alcohol, drying at 100-120 ℃, grinding the obtained solid particles into powder, calcining in a muffle furnace, cooling, and grinding again to obtain TiO2Co-doped compositesAnd (3) synthesizing the photocatalyst. TiO prepared by the invention2The Co-doped composite photocatalyst has strong electron obtaining capacity, changes the motion conditions of electrons and holes, and greatly improves the photocatalytic activity.
Description
Technical Field
The invention relates to the technical field of synthesis and photocatalytic degradation of nano materials, in particular to TiO2A preparation method of a Co-doped composite photocatalyst and application of the Co-doped composite photocatalyst in degrading nonyl phenol.
Background
In recent years, due to the increasing energy consumption and the problem of water pollution, the photocatalytic technology has attracted much attention to the degradation of some organic pollutants, and in the photocatalytic technology, titanium dioxide has become a catalyst material commonly used in the field of water pollution treatment because of its advantages of good chemical stability and low cost. However, titanium dioxide itself has certain defects, such as unsuitability for treating wastewater with high concentration, difficulty in secondary recovery, high requirement of external light source, and easy electron recombination with excited electrons, which results in reduction of photocatalytic efficiency.
Disclosure of Invention
One of the purposes of the invention is to utilize TiO to solve the problem of low efficiency of titanium dioxide photocatalyst in degrading organic matters2Co doping and the characteristic of coprecipitation method are combined to provide TiO2A preparation method of a Co-doped composite photocatalyst.
Another object of the present invention is to provide a TiO compound2A method for degrading organic pollutants by using a Co-doped composite photocatalyst.
The technical scheme adopted for realizing the purpose of the invention is as follows: TiO 22The preparation method of the Co-doped composite photocatalyst comprises the following steps:
1) slowly dripping tetrabutyl titanate into absolute ethyl alcohol, and violently stirring for 30-60 min at room temperature to obtain a mixed solution A;
2) taking absolute ethyl alcohol, glacial acetic acid, concentrated nitric acid and cobalt nitrate aqueous solution, and uniformly stirring to obtain a mixed solution B;
3) dropwise adding the mixed solution B into the mixed solution A, stirring for 1-2 h, standing for 24-72 h, and filtering to obtain a solid substance;
4) washing the solid obtained in the step 3) with ultrapure water and absolute ethyl alcohol, and drying at 100-120 ℃ to obtain solid particles;
5) grinding the solid particles obtained in the step 4) into powder, putting the powder into a muffle furnace for calcining, cooling and grinding again to obtain TiO2And doping the Co composite photocatalyst.
Further, in the above preparation method, step 1), the ratio by volume of the absolute ethyl alcohol to tetrabutyl titanate is 4: 1.
Further, in the preparation method, in the step 2), the concentration of the cobalt nitrate aqueous solution is 0.3-0.5 mol/L.
Further, in the above preparation method, step 2), the volume ratio of the anhydrous ethanol to the glacial acetic acid to the concentrated nitric acid to the cobalt nitrate aqueous solution is 2:1:1: 0.2-0.6.
Furthermore, in the above preparation method, in step 2), the volume ratio of the anhydrous ethanol to the glacial acetic acid to the concentrated nitric acid to the cobalt nitrate aqueous solution is 2:1:1: 0.4.
Further, in the preparation method, in the step 5), the raw materials are calcined in a muffle furnace at 500 ℃ for 5 hours, and the heating rate is 20 ℃/min.
TiO prepared according to the above process2Application of the Co-doped composite photocatalyst in degradation of organic pollutants.
Further, the organic contaminant is nonylphenol.
Further, the method is as follows: adding the TiO prepared by the method into a solution containing nonyl phenol2And doping the Co composite photocatalyst, and performing photocatalytic degradation for 300 min.
Further, the initial concentration of the nonyl phenol is adjusted to be 15-25 mg/L.
Further, in the above-mentioned case,adding 0.05-0.25 g of TiO into every 100mL of nonylphenol solution with initial concentration of 15-25 mg/L2And doping the Co composite photocatalyst.
The invention has the beneficial effects that:
(1) TiO prepared by the invention2The Co-doped composite photocatalyst is beneficial to the degradation of organic pollutants, saves the cost and is environment-friendly.
(2) TiO prepared by the invention2The Co-doped composite photocatalyst has uniform and stable chemical components and good dispersibility.
(3) TiO prepared by the invention2The Co-doped composite photocatalyst is prepared by a coprecipitation method, and is prepared by mixing substances with different components in a solution state, appropriately standing and precipitating the mixed solution to obtain a precursor precipitate, and drying and calcining the precipitate to obtain the photocatalyst. The preparation condition of the invention is easy to control, the operation method is simple, the cost is low, and the invention is environment-friendly.
(4) TiO prepared by the invention2The Co-doped composite photocatalyst has good catalytic effect on the photodegradation process of nonyl phenol in sewage. The TiO of the invention2Adding Co-doped composite photocatalyst into nonyl phenol solution in a certain amount, and irradiating TiO under illumination at certain intensity for a certain time2The Co-doped composite photocatalyst has strong electron obtaining capability and changes the motion condition of electron holes, so that the TiO compound photocatalyst has high activity2The Co-doped composite photocatalyst has enhanced oxidizability and can react with OH-or H adsorbed on the surface of the Co-doped composite photocatalyst2O reacts to generate active oxygen free radical, which can destroy the bond, C-N bond, C-H bond, O-H bond and unsaturated bond in organic matter to generate nonhazardous H2O、CO2And the like, thereby achieving the purpose of degrading organic matters.
Drawings
FIG. 1 shows the effect of composite photocatalysts prepared by different Co doping amounts in example 2 on the catalytic degradation performance of nonyl phenol.
FIG. 2 shows the effect of different amounts of composite photocatalyst on the catalytic degradation performance of nonyl phenol in example 2.
Detailed Description
Example 1
TiO2The preparation method of the Co-doped composite photocatalyst comprises the following steps:
1. 10ml of tetrabutyl titanate is slowly dropped into 40ml of absolute ethyl alcohol, and is vigorously stirred for 40min at room temperature to obtain light yellow liquid.
2. 10ml of absolute ethyl alcohol, 5ml of glacial acetic acid, 5ml of concentrated nitric acid and 5ml of cobalt nitrate aqueous solution with the concentration of 0.4mol/L are taken and stirred uniformly to obtain light red solution.
3. And (3) dropwise adding the light red solution obtained in the step (2) into the light yellow liquid obtained in the step (1), stirring for 1h, standing at room temperature for precipitation for 48h, and filtering to obtain a solid.
4. And (3) washing the solid obtained in the step (3) with ultrapure water and absolute ethyl alcohol, and then putting the washed solid into a drying oven at the temperature of 110 ℃ for drying to obtain solid particles.
5. Grinding the solid particles obtained in the step 4 into powder in a mortar, moving to a crucible, putting into a muffle furnace, heating to 500 ℃ at a heating rate of 20 ℃/min, calcining for 5h, taking out the calcined sample, grinding again to obtain TiO2And doping the Co composite photocatalyst.
Example 2 TiO2Application of Co-doped composite photocatalyst in catalytic degradation of nonyl phenol
The method comprises the following steps: in a solution containing nonyl phenol, adjusting the initial concentration of the nonyl phenol to be 15-25 mg/L, and adding TiO2And doping the Co composite photocatalyst, and performing photocatalytic degradation for 300 min. Adding 0.05-0.25 g of TiO into every 100mL of nonylphenol solution with initial concentration of 15-25 mg/L2And doping the Co composite photocatalyst.
The degradation rate of the nonylphenol solution can be calculated by the following calculation formula:
Q＝(C0-Ct)/C0×100％
wherein Q is the degradation rate of the nonyl phenol solution, C0Initial concentration of nonylphenol solution, CtTo add TiO2And (3) the concentration of the nonyl phenol solution doped with the Co composite photocatalyst at t.
(one) different Co doping amountPrepared TiO2Influence of Co-doped composite photocatalyst on catalytic degradation of nonyl phenol
1. TiO with different Co doping amount2Preparation of Co-doped composite photocatalyst
The procedure was as in example 1, except that the amount of the aqueous cobalt nitrate solution added was adjusted to 0.4 mol/L.
Adjusting the addition amounts of the cobalt nitrate aqueous solution with the concentration of 0.4mol/L to be 1mL, 1.5mL, 2mL, 2.5mL and 3mL respectively, and correspondingly preparing TiO with Co doping amounts of 1%, 2%, 3%, 4% and 5% respectively2And doping the Co composite photocatalyst.
2. Catalytic degradation of nonyl phenol
The method comprises the following steps: dividing into 5 groups, taking 5 quartz tubes in each group, respectively adding 100mL of nonylphenol solution with initial concentration of 20mg/L, and respectively adding 0.05g of prepared TiO with Co doping amounts of 1%, 2%, 3%, 4% and 5%2Placing the Co-doped composite photocatalyst in a photochemical reaction instrument, stirring and adsorbing for 30min in the dark, performing illumination for 5h and keeping magnetic stirring after the dark adsorption time is finished, taking a sample every 1h, placing the sample in a centrifugal machine for separation, taking out supernatant liquid after the centrifugal separation is finished, performing absorbance test at 235nm by using an ultraviolet spectrophotometer, taking out 5 times in total, and recording different TiO compounds2And (3) calculating the degradation rate of the nonyl phenol by using the absorbance of the Co-doped composite photocatalyst. The results are shown in FIG. 1.
As can be seen from fig. 1, with the increase of the Co doping amount, the degradation capability of the composite photocatalyst on nonylphenol increases firstly and then decreases, when the Co doping amount is 3%, the degradation effect is the best, and when the Co doping amount is 4% and 5%, the degradation effect is reduced, so that the invention is preferred, and the optimum Co doping amount is 3%.
(II) different TiO2Influence of Co-doped composite photocatalyst addition amount on catalytic degradation of nonylphenol
1、TiO2Preparation of Co-doped composite photocatalyst
1) 10ml of tetrabutyl titanate is slowly dropped into 40ml of absolute ethyl alcohol, and is vigorously stirred for 40min at room temperature to obtain light yellow liquid.
2) 10ml of absolute ethyl alcohol, 5ml of glacial acetic acid, 5ml of concentrated nitric acid and 2ml of aqueous solution of cobalt nitrate with the concentration of 0.4mol/L are taken and evenly stirred to obtain light red solution.
3) Dropwise adding the light red solution obtained in the step 2) into the light yellow liquid obtained in the step 1), stirring for 1h, standing and precipitating at room temperature for 48h, and filtering to obtain a solid.
4) Washing the solid obtained in the step 3) with ultrapure water and absolute ethyl alcohol, and drying in a drying oven at 110 ℃ to obtain solid particles.
5) Grinding the solid particles obtained in the step 4) into powder in a mortar, moving the powder into a crucible, putting the crucible into a muffle furnace, heating the powder to 500 ℃ at a heating rate of 20 ℃/min, calcining the powder for 5 hours, taking out the calcined sample, and grinding the calcined sample again to obtain TiO with the Co doping amount of 3 percent2And doping the Co composite photocatalyst.
2. Catalytic degradation of nonyl phenol
The method comprises the following steps: dividing into 5 groups, taking 5 quartz tubes in each group, respectively adding 100mL of nonylphenol solution with initial concentration of 20mg/L, and respectively adding 0.05g, 0.10g, 0.15g, 0.20g and 0.25g of TiO with Co doping amount of 3%2The method comprises the steps of doping a Co composite photocatalyst, placing the Co composite photocatalyst in a photochemical reaction instrument, stirring and adsorbing for 30min in the dark, illuminating for 5h and keeping magnetic stirring after dark adsorption time is finished, taking a sample every 1h, placing the sample in a centrifugal machine for separation, taking out supernatant liquor after centrifugal separation is finished, carrying out absorbance test at 235nm by using an ultraviolet spectrophotometer for 5 times, recording the absorbance of the composite photocatalyst when different composite photocatalyst addition amounts are added, and calculating the degradation rate of nonyl phenol. The results are shown in FIG. 2.
As can be seen from FIG. 2, with the increase of the addition amount of the composite photocatalyst, the degradation capability of the composite photocatalyst on the nonyl phenol is reduced, because the excessive catalyst can shield the solution, the utilization rate of the compound photocatalyst on photons is reduced, and the degradation effect on the nonyl phenol is further influenced. When adding TiO with the Co doping amount of 3 percent2When the amount of the Co-doped composite photocatalyst is 0.05g, the degradation rate of nonyl phenol is highest and reaches 77% after 5 hours of photocatalytic reaction. Therefore, the present invention preferably selects nonane with an initial concentration of 20mg/L per 100mLPhenol solution, 0.05g of TiO was added2And doping the Co composite photocatalyst.
Claims (10)
1.TiO2The preparation method of the Co-doped composite photocatalyst is characterized by comprising the following steps:
1) slowly dripping tetrabutyl titanate into absolute ethyl alcohol, and violently stirring for 30-60 min at room temperature to obtain a mixed solution A;
2) taking absolute ethyl alcohol, glacial acetic acid, concentrated nitric acid and cobalt nitrate aqueous solution, and uniformly stirring to obtain a mixed solution B;
3) dropwise adding the mixed solution B into the mixed solution A, stirring for 1-2 h, standing for 24-72 h, and filtering to obtain a solid substance;
4) washing the solid obtained in the step 3) with ultrapure water and absolute ethyl alcohol, and drying at 100-120 ℃ to obtain solid particles;
5) grinding the solid particles obtained in the step 4) into powder, putting the powder into a muffle furnace for calcining, cooling and grinding again to obtain TiO2And doping the Co composite photocatalyst.
2. The method of claim 1, wherein: in the step 1), the volume ratio of absolute ethyl alcohol to tetrabutyl titanate is 4: 1.
3. The method of claim 1, wherein: in the step 2), the concentration of the cobalt nitrate aqueous solution is 0.3-0.5 mol/L.
4. The production method according to claim 3, characterized in that: in the step 2), the volume ratio of the absolute ethyl alcohol to the glacial acetic acid to the concentrated nitric acid to the cobalt nitrate aqueous solution is 2:1:1: 0.2-0.6.
5. The method of claim 4, wherein: in the step 2), the volume ratio of the absolute ethyl alcohol to the glacial acetic acid to the concentrated nitric acid to the cobalt nitrate aqueous solution is 2:1:1: 0.4.
6. The method of claim 1, wherein: in the step 5), calcining the mixture for 5 hours at 500 ℃ in a muffle furnace at the heating rate of 20 ℃/min.
7. TiO prepared by the process according to any one of claims 1 to 62Application of the Co-doped composite photocatalyst in degradation of organic pollutants.
8. Use according to claim 7, characterized in that the organic contaminant is nonylphenol.
9. Use according to claim 8, characterized in that the method is as follows: adding TiO prepared according to the method of any one of claims 1 to 6 to a solution containing nonylphenol2And doping the Co composite photocatalyst, and performing photocatalytic degradation for 300 min.
10. The use according to claim 9, wherein the initial concentration of nonylphenol is adjusted to 15 to 25mg/L, and 0.05 to 0.25g of TiO is added per 100mL of nonylphenol solution having an initial concentration of 15 to 25mg/L2And doping the Co composite photocatalyst.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113550069A (en) * | 2021-08-04 | 2021-10-26 | 安徽锦鼎织造有限公司 | Preparation process of terahertz hot-air cotton |
| CN116273191A (en) * | 2023-03-28 | 2023-06-23 | 上海应用技术大学 | Cobalt ion doped TiO 2 microsphere/TCPP (Cu) photocatalyst and preparation method and application thereof |
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| 孙雪微: ""二氧化钛复合催化剂协同硫酸根自由基类Fenton体系光催化降解壬基酚的研究"", 《中国优秀博硕士学位论文全文数据库（硕士）工程科技Ⅰ辑》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113550069A (en) * | 2021-08-04 | 2021-10-26 | 安徽锦鼎织造有限公司 | Preparation process of terahertz hot-air cotton |
| CN116273191A (en) * | 2023-03-28 | 2023-06-23 | 上海应用技术大学 | Cobalt ion doped TiO 2 microsphere/TCPP (Cu) photocatalyst and preparation method and application thereof |
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