CN111204804A - BiVO4Preparation method of nano material - Google Patents

BiVO4Preparation method of nano material Download PDF

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CN111204804A
CN111204804A CN202010043902.9A CN202010043902A CN111204804A CN 111204804 A CN111204804 A CN 111204804A CN 202010043902 A CN202010043902 A CN 202010043902A CN 111204804 A CN111204804 A CN 111204804A
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bivo
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mixed solution
nano material
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CN111204804B (en
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聂秋林
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Hangzhou Dianzi University
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    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G31/00Compounds of vanadium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/002Mixed oxides other than spinels, e.g. perovskite
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/20Vanadium, niobium or tantalum
    • B01J23/22Vanadium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/20Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
    • B01J35/23Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39Photocatalytic properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00Nanotechnology for materials or surface science, e.g. nanocomposites
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    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/60Particles characterised by their size
    • C01P2004/64Nanometer sized, i.e. from 1-100 nanometer
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
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    • C02F2101/308Dyes; Colorants; Fluorescent agents
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    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/10Photocatalysts
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    • Y02W10/00Technologies for wastewater treatment
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    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

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Abstract

The invention discloses a BiVO4A method for preparing nano material. The invention adopts hydrophilic high molecular polymer sodium polyacrylate and a crosslinking agent in aqueous solution to form a hydrophilic nano reactor with a network structure, thereby limiting BiVO4The crystal growth preparation method can obtain BiVO with the size of 12-18 nm and good dispersibility4The nano crystal has excellent performance of catalyzing and degrading rhodamine B.

Description

BiVO4Preparation method of nano material
Technical Field
The invention belongs to the technical field of environmental photocatalysis, relates to preparation of visible light response photocatalyst, and particularly relates to BiVO4A method for preparing nano material.
Background
The photocatalysis technology for degrading organic pollutants by utilizing the semiconductor photocatalyst under the action of sunlight has the characteristics of high efficiency, energy conservation and cleanness, and is widely concerned in the aspects of environmental management and the like. Semiconductor photocatalysts such as TiO2ZnO and the like are widely applied to catalytic degradation of organic matters, but can only absorb ultraviolet light accounting for less than 5% of sunlight due to high forbidden energy level, and has poor response to visible light. Monoclinic phase BiVO4The catalyst is a semiconductor material with stable performance, has the forbidden band width of about 2.4eV, has the characteristics of no toxicity, no harm, stable property, safety, environmental protection and the like, and can be used as a novel inorganic nonmetal semiconductor catalyst with high visible light activity to be applied to removing organic pollutants. Yanjianji et al (Yulin academy of education (Nature science) at 5 th stage of 2018, pages 55-64]With Bi (NO)3)3·5H2O and NH4VO3Adopts a hydrothermal method as a raw material, and prepares BiVO by regulating and controlling the pH value of a reaction solution and adding a surfactant sodium dodecyl sulfate4A visible light photocatalyst. BiVO4The visible light catalyst is a dendritic structure formed by agglomeration of a plurality of nanocrystals with the average grain size of 27.7nm, and the visible light catalyst is BiVO4In the presence of the dye, the decomposition of the methylene blue dye is accelerated, and the highest degradation rate is 89% after 2 hours of visible light irradiation. Lijie et al (inorganic materials journal, 164-172 p 2 2019) of Henan university of science and technology adopts a microwave hydrothermal method to produce BiVO3·5H2O and NH4VO3As a raw material, and a visible light catalyst BiVO with a monoclinic system structure can be controllably synthesized by regulating and controlling the pH of a precursor solution to be 94The crystal size is about 1-2 mu, and the degradation rate of methylene blue is 84.6%. The former has serious agglomeration, and the crystals obtained by the latter are all micron-sized large crystals, which affects the catalytic performance of the catalyst.
Disclosure of Invention
The invention aims to provide a BiVO (BiVO) aiming at the defects of the prior art4The preparation method of the nano material adopts hydrophilic high molecular polymer sodium polyacrylate and a cross-linking agent to form a hydrophilic nano reactor with a network structure in aqueous solution, so that BiVO is limited4The crystal growth preparation method can obtain BiVO with the size of 12-18 nm and good dispersibility4The nano crystal has excellent performance of catalyzing and degrading rhodamine B.
BiVO of the invention4The preparation method of the nano material comprises the following specific steps:
0.01 to 0.03mol of Bi (NO)3)3·5H2Dissolving O in 30-50 ml of ethylene glycol to obtain Bi (NO)3)3A glycol solution;
adding 0.01 to 0.03mol NH4VO3Dissolving the mixture in 30-50 ml of deionized water to obtain NH4VO3A solution;
reacting NH4VO3Slowly adding Bi (NO) into the solution3)3Stirring uniformly in the ethylene glycol solution to obtain a mixed solution; sequentially adding 0.4-1.0 g of sodium polyacrylate and0.01-0.03 g of cationic polyacrylamide, then placing the mixture into a stainless steel reaction kettle with a polytetrafluoroethylene lining, reacting for 12-24 hours at 120-150 ℃, and naturally cooling to room temperature after the reaction is finished; separating and washing the obtained precipitate, and drying at 60-80 ℃ to obtain BiVO4And (4) crystals.
The molecular formula of the cationic polyacrylamide is ([ CH)2CH(CONH2)]m[(CH2CH)COO-CH2CH2N+(CH3)3Cl]n) The molecular weight is 100-300 ten thousand;
the molecular weight of the sodium polyacrylate is 500-700 ten thousand.
The invention has the beneficial effects that:
the invention adopts hydrophilic high molecular polymer sodium polyacrylate and cross-linking agent cationic polyacrylamide in aqueous solution to form a hydrophilic nano-reactor with a network structure, thereby limiting BiVO4The crystal growth preparation method can obtain BiVO with the size of 12-18 nm and good dispersibility4The nano crystal has excellent performance of catalyzing and degrading rhodamine B.
Detailed Description
The present invention is further analyzed with reference to the following specific examples.
Comparative example 1
0.01mol of Bi (NO)3)3·5H2Dissolving O in 30ml of ethylene glycol to obtain Bi (NO)3)3A glycol solution;
adding 0.01mol NH4VO3Dissolved in 30ml of deionized water to obtain NH4VO3A solution;
reacting NH4VO3Slowly adding Bi (NO) into the solution3)3Stirring uniformly in the ethylene glycol solution to obtain a mixed solution; placing the mixed solution in a stainless steel reaction kettle with a polytetrafluoroethylene lining, reacting for 24 hours at 120 ℃, and naturally cooling to room temperature after the reaction is finished; separating and washing the obtained precipitate, and drying at 60 ℃ to obtain BiVO4And (4) crystals.
Example 1:
will be 0.01mol of Bi (NO)3)3·5H2Dissolving O in 30ml of ethylene glycol to obtain Bi (NO)3)3A glycol solution;
adding 0.01mol NH4VO3Dissolved in 30ml of deionized water to obtain NH4VO3A solution;
reacting NH4VO3Slowly adding Bi (NO) into the solution3)3Stirring uniformly in the ethylene glycol solution to obtain a mixed solution; sequentially adding 0.4g of sodium polyacrylate and 0.01g of cationic polyacrylamide into the mixed solution, then placing the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, reacting for 24 hours at 120 ℃, and naturally cooling to room temperature after the reaction is finished; separating and washing the obtained precipitate, and drying at 60 ℃ to obtain BiVO4And (4) crystals.
Example 2:
0.03mol of Bi (NO)3)3·5H2Dissolving O in 50ml of ethylene glycol to obtain Bi (NO)3)3A glycol solution;
0.03mol NH4VO3Dissolved in 50ml of deionized water to give NH4VO3A solution;
reacting NH4VO3Slowly adding Bi (NO) into the solution3)3Stirring uniformly in the ethylene glycol solution to obtain a mixed solution; sequentially adding 1.0g of sodium polyacrylate and 0.03g of cationic polyacrylamide into the mixed solution, then placing the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, reacting for 12 hours at 150 ℃, and naturally cooling to room temperature after the reaction is finished; separating and washing the obtained precipitate, and drying at 80 ℃ to obtain BiVO4And (4) crystals.
Example 3:
0.02mol of Bi (NO)3)3·5H2Dissolving O in 40ml of ethylene glycol to obtain Bi (NO)3)3A glycol solution;
0.02mol NH4VO3Dissolved in 40ml of deionized water to give NH4VO3A solution;
reacting NH4VO3Slowly adding Bi (NO) into the solution3)3Stirring in glycol solutionUniformly obtaining a mixed solution; sequentially adding 0.6g of sodium polyacrylate and 0.02g of cationic polyacrylamide into the mixed solution, then placing the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, reacting for 18 hours at 140 ℃, and naturally cooling to room temperature after the reaction is finished; separating and washing the obtained precipitate, and drying at 70 ℃ to obtain BiVO4And (4) crystals.
Example 4:
0.02mol of Bi (NO)3)3·5H2Dissolving O in 45ml of ethylene glycol to obtain Bi (NO)3)3A glycol solution;
0.02mol NH4VO3Dissolved in 45ml of deionized water to give NH4VO3A solution;
reacting NH4VO3Slowly adding Bi (NO) into the solution3)3Stirring uniformly in the ethylene glycol solution to obtain a mixed solution; sequentially adding 0.8g of sodium polyacrylate and 0.02g of cationic polyacrylamide into the mixed solution, then placing the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, reacting for 16 hours at 140 ℃, and naturally cooling to room temperature after the reaction is finished; separating and washing the obtained precipitate, and drying at 75 ℃ to obtain BiVO4And (4) crystals.
Photocatalytic degradation experiment
A300W xenon lamp is used as a light source, and an optical filter is arranged between the light source and the reactor to filter ultraviolet light below 420 nm. 20mg of the catalyst BiVO prepared in comparative example 1 and examples 1 to 4 were weighed out4Adding the solution into 100mL of 5mg/L rhodamine B solution, placing a light source above a reaction kettle, and fixing the distance between the light source and the liquid level of the RhB solution in the reaction kettle to be 6.5 cm. Stirring for 30min in dark to ensure that the sample is dispersed uniformly and fully absorbed. The light source was then turned on and the magnetic stirring was continued, maintaining the temperature at 25 ℃. Detecting the change of the RhB concentration in the solution by adopting an ultraviolet-visible spectrometer, and calculating the degradation rate of RhB according to the formula: (Co-C)/Co 100%.
Table 1 catalyst BiVO4Catalytic degradation rate of rhodamine B under visible light
Degradation Rate/illumination 100Min (%) Degradation/illumination of RhB 180Min (%)
Example 1 73.5 97.5
Example 2 76.2 98.3
Example 3 70.5 95.4
Example 4 70.7 95.5
Comparative example 1 55.5 83.5

Claims (3)

1. BiVO4The preparation method of the nano material is characterized by comprising the following steps:
0.01 to 0.03mol of Bi (NO)3)3·5H2Dissolving O in 30-50 ml of ethylene glycol to obtain Bi (NO)3)3A glycol solution;
adding 0.01 to 0.03mol NH4VO3Dissolving the mixture in 30-50 ml of deionized water to obtain NH4VO3A solution;
reacting NH4VO3Slowly adding Bi (NO) into the solution3)3Stirring uniformly in the ethylene glycol solution to obtain a mixed solution; sequentially adding 0.4-1.0 g of sodium polyacrylate and 0.01-0.03 g of cationic polyacrylamide into the mixed solution, then placing the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, reacting for 12-24 hours at 120-150 ℃, and naturally cooling to room temperature after the reaction is finished; separating and washing the obtained precipitate, and drying at 60-80 ℃ to obtain BiVO4And (4) crystals.
2. A BiVO according to claim 14The preparation method of the nano material is characterized in that the molecular weight of the cationic polyacrylamide is 100-300 ten thousand, and the molecular formula is as follows:
([CH2CH(CONH2)]m[(CH2CH)COO-CH2CH2N+(CH3)3Cl]n)。
3. a BiVO of claim 1 or 24The preparation method of the nano material is characterized in that the molecular weight of the sodium polyacrylate is 500-700 ten thousand.
CN202010043902.9A 2020-01-15 2020-01-15 BiVO4Preparation method of nano material Active CN111204804B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103224251A (en) * 2013-05-15 2013-07-31 湛江师范学院 Preparation method of microwave-synthesized monoclinic system olivary pucherite BiVO4
CN104108753A (en) * 2013-04-22 2014-10-22 海南师范大学 Preparation for visible-light responsible BiVO4 catalyst
CN105731538A (en) * 2014-12-08 2016-07-06 青岛农业大学 High pressure-hydrothermal method for preparation of BiVO4 photocatalyst
CN106268760A (en) * 2016-08-11 2017-01-04 广西南宁胜祺安科技开发有限公司 A kind of method preparing pucherite base composite photocatalyst

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104108753A (en) * 2013-04-22 2014-10-22 海南师范大学 Preparation for visible-light responsible BiVO4 catalyst
CN103224251A (en) * 2013-05-15 2013-07-31 湛江师范学院 Preparation method of microwave-synthesized monoclinic system olivary pucherite BiVO4
CN105731538A (en) * 2014-12-08 2016-07-06 青岛农业大学 High pressure-hydrothermal method for preparation of BiVO4 photocatalyst
CN106268760A (en) * 2016-08-11 2017-01-04 广西南宁胜祺安科技开发有限公司 A kind of method preparing pucherite base composite photocatalyst

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
县涛 等: "粒径可控的纳米铁酸铋的制备及其光催化性能", 《催化学报》 *

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