CN108435172A - A kind of ultraviolet optical drive nano-composite catalyst - Google Patents

A kind of ultraviolet optical drive nano-composite catalyst Download PDF

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Publication number
CN108435172A
CN108435172A CN201810353716.8A CN201810353716A CN108435172A CN 108435172 A CN108435172 A CN 108435172A CN 201810353716 A CN201810353716 A CN 201810353716A CN 108435172 A CN108435172 A CN 108435172A
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silver
nano
wolframic acid
catalyst
composite catalyst
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占明军
刘金库
王凤蕊
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SHANGHAI ZEMING ENVIRONMENTAL SCI&TECH Co Ltd
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SHANGHAI ZEMING ENVIRONMENTAL SCI&TECH Co Ltd
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    • 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
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56Platinum group metals
    • B01J23/64Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/652Chromium, molybdenum or tungsten
    • B01J23/6527Tungsten
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • 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
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/0009Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
    • B01J37/0018Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02Impregnation, coating or precipitation
    • B01J37/03Precipitation; Co-precipitation
    • B01J37/031Precipitation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/34Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
    • B01J37/341Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
    • B01J37/343Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of ultrasonic wave energy
    • 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00Manufacture or treatment of nanostructures
    • CCHEMISTRY; METALLURGY
    • 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
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/80Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804UV light
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/38Organic compounds containing nitrogen
    • CCHEMISTRY; METALLURGY
    • 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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Abstract

The invention belongs to Environmental Chemistry technical fields, and in particular to a kind of ultraviolet optical drive nano-composite catalyst, preparation method and its application in environmental area.By the present invention in that generating Nano silver grain in wolframic acid silver surface with the method for ultraviolet source irradiation, utilize the plasma resonance effect of metal Nano silver grain, nano silver/wolframic acid silver composite highly effective visible light catalyst has been prepared, can realize the fast degradation of organic matter in sewage system.Due to small-size effect and plasma resonance effect, not only so that the catalytic effect of the nano-photocatalyst is obviously improved, but also the usage amount of catalyst is substantially reduced, effectively saves use cost of the photochemical catalyst in field of environmental improvement.

Description

A kind of ultraviolet optical drive nano-composite catalyst
Technical field
The invention belongs to Environmental Chemistry technical fields, and in particular to a kind of ultraviolet optical drive nano silver/wolframic acid silver is compound is urged Agent, preparation method and its application in environmental area.
Background technology
The moment such as water pollution, air pollution in life are all threatening people's health.How pollution, protection ring are reduced Border becomes the problem of countries in the world are paid close attention to jointly.Therefore, how efficient process harmful organic substance becomes the heat that environmental area is studied Point.At present most study, the use of most wide photochemical catalyst is anatase titanium dioxide nano-powder, it is cheap because its is safe and non-toxic Price and photocatalysis performance outstanding and by numerous concerns.Anatase titanium dioxide is disadvantageous in that, energy gap It is wider, the ultraviolet excitation (λ with specific wavelength is needed when in use<387nm), and the energy of ultraviolet region is less than too in sunlight The 5% of sunlight gross energy, if using the direct catalytic degradation organic pollution of sunlight, the effect is unsatisfactory.In order to solve this One problem, it is seen that photochemical catalyst becomes the hot spot of photocatalysis field research.Although wolframic acid silver photochemical catalyst is that one kind is had excellent performance Visible light catalyst, but seldom about wolframic acid silver photochemical catalyst report at present, the catalytic effect of the Ag tungstate catalyst of acquisition Need to further increase, hinder such material field of environmental improvement practical application process.
It is well known that the specific surface area for improving catalyst is the most common means for promoting catalyst effect, and this Invention is directed to the existing dissatisfactory deficiency of Ag tungstate catalyst catalytic effect, creatively proposes a kind of nano silver/wolframic acid The preparation method of silver-colored composite catalyst generates the side of nano silver and micro-injection reactant by using wolframic acid silver photodecomposition Method has prepared nano silver/wolframic acid silver composite photo-catalyst.The ingenious plasma resonance that nano silver particles are utilized of this method Effect significantly improves degradation efficiency of the wolframic acid silver photochemical catalyst to organic pollution.
Invention content
It is an object of the invention to propose a kind of preparation side of new ultra-violet optical drive nano silver/wolframic acid silver composite catalyst Method, acquisition catalytic performance is superior, the novel nano photochemical catalyst of stable structure, solves existing pure titinium dioxide or load dioxy The visible light utilization efficiency of Ag tungstate catalyst that the catalyst visible light catalytic effect of change titanium is undesirable and common is low, is catalyzed The problems such as journey is slow, while the usage amount of wolframic acid silver when degradation unit volume is catalyzed object is effectively reduced, improve catalyst Service efficiency reduces the use cost of catalyst, help to realize Ag tungstate catalyst field of environmental improvement quantum jump.
The present invention proposes a kind of preparation method of ultraviolet optical drive nano silver/wolframic acid silver composite catalyst, specific to prepare Step is:1) silver nitrate solution and ammonium hydroxide is used to prepare silver ammino solution;2) prepared sodium tungstate solution is put into beaker, is added Enter proper amount of surfactant;3) sodium tungstate solution is placed in ultrasonic disperser, is added silver ammino solution using micro syringe Enter into sodium tungstate solution;4) precipitation of generation is centrifuged, it is dry after washing, then be placed under ultraviolet light and irradiate 1~3 point Clock generates Nano silver grain in wolframic acid silver surface, collects product, obtain nano silver/wolframic acid silver composite catalyst.
The specific preparation condition of nano silver/wolframic acid silver composite catalyst is in the present invention:1) the addition matter of surfactant Amount:The 0.5~10% of silver-colored source and sodium tungstate quality summation;2) template used in is polyethylene glycols or triton x-100 Or one kind of Tween 80 or Sodium Polyacrylate or neopelex.3) light source used in is ultraviolet light.
The invention has the advantages that:
1, it has been put forward for the first time a kind of method preparing nano silver/wolframic acid silver composite photo-catalyst using light sensitivity principles.
2. since the nano silver prepared by this method has plasma resonance effect, urging for wolframic acid silver can be obviously improved Change activity.Compared with single wolframic acid silver photochemical catalyst, nano silver/wolframic acid silver composite photo-catalyst is in the same amount of Luo Dan that degrades When bright B, catalytic efficiency is 10 times of existing Ag tungstate catalyst or more.
3. the present invention prepares nano silver/wolframic acid silver composite photocatalyst under the conditions of ultraviolet light by micro-injection for the first time Agent, and new pattern can be generated by changing the type of surfactant, to realize for different-shape nano silver/wolframic acid The compound controlledly synthesis of silver.It is compared compared with method, not only product catalyst performance is good, but also realizes that the artificial of morphology and size can Control, meets different application demands.
Specific implementation mode
Below by specific embodiment, the present invention is further illustrated.
Embodiment 1:
It measures 10mL 0.5mol/L wolframic acid sodium water solutions to be placed in clean beaker, beaker is placed in ultrasonic dispersers, is added 1mL 0.14g/L polyglycol solutions, after surfactant is completely dissolved, by 10mL 1.0mol/L silver ammino solutions with micro Injection is added in beaker, after complete reaction, is filtered, and spontaneously dries obtain wolframic acid aluminium powder at room temperature, then be in wavelength It is irradiated 3 minutes under the ultraviolet lamp that 265nm power is 8 watts, obtains nano silver/wolframic acid silver composite photo-catalyst.
Embodiment 2
It measures 10mL 0.05mol/L wolframic acid sodium water solutions to be placed in clean beaker, beaker is placed in ultrasonic dispersers, is added Enter 1mL 0.14g/L triton x-100 solution, after surfactant is completely dissolved, by 10mL 0.15mol/L silver ammino solutions It is added in beaker with micro-injection agent, after complete reaction, is filtered, spontaneously dried obtain wolframic acid aluminium powder at room temperature, then Wavelength is to be irradiated 2 minutes under the ultraviolet lamp that 265nm power is 10 watts, obtains nano silver/wolframic acid silver composite photo-catalyst.
Embodiment 3
It measures 10mL 0.05mol/L wolframic acid sodium water solutions to be placed in clean beaker, beaker is placed in ultrasonic dispersers, is added Enter 1mL 0.14g/L polyacrylamide solutions, after surfactant is completely dissolved, 10mL 0.15mol/L silver ammino solutions are used Micro-injection agent is added in beaker, after complete reaction, is filtered, and spontaneously dries obtain wolframic acid aluminium powder at room temperature, then in wave It is irradiated 2 minutes under the ultraviolet lamp that a length of 265nm power is 15 watts, obtains nano silver/wolframic acid silver composite photo-catalyst.
Embodiment 4
It measures 10mL 0.05mol/L wolframic acid sodium water solutions to be placed in clean beaker, beaker is placed in ultrasonic dispersers, is added Enter 1mL 2.8g/L Tween 80 solution, after surfactant is completely dissolved, by 10mL 0.15mol/L silver ammino solutions with micro Injection is added in beaker, after complete reaction, is filtered, and spontaneously dries obtain wolframic acid aluminium powder at room temperature, then be in wavelength It is irradiated 2 minutes under the ultraviolet lamp that 265nm power is 8 watts, obtains nano silver/wolframic acid silver composite photo-catalyst.
Embodiment 5
It measures 10mL 0.05mol/L wolframic acid sodium water solutions to be placed in clean beaker, beaker is placed in ultrasonic dispersers, is added Enter 1mL 2.8g/L neopelex solution, after surfactant is completely dissolved, by 10mL 0.15mol/L silver ammonia Solution is added to micro-injection agent in beaker, after complete reaction, is filtered, and spontaneously dries obtain wolframic acid aluminium powder at room temperature, It is irradiated 1 minute in the case where wavelength is the ultraviolet lamp that 265nm power is 15 watts again, obtains nano silver/wolframic acid silver composite photo-catalyst.

Claims (4)

1. a kind of ultraviolet optical drive nano-composite catalyst, the nano-composite catalyst is by nano silver and wolframic acid money part group At specific preparation process is:1) silver nitrate solution and ammonium hydroxide is used to prepare silver ammino solution;2) prepared sodium tungstate solution is put Enter in beaker, proper amount of surfactant is added;3) sodium tungstate solution is placed in ultrasonic disperser, will using micro syringe Silver ammino solution is added in sodium tungstate solution;4) precipitation of generation is centrifuged, it is dry after washing, then be placed under ultraviolet light Irradiation 1~3 minute makes wolframic acid silver surface generate nano silver particles, collects product, obtains nano silver/wolframic acid silver composite catalyst.
2. a kind of ultraviolet optical drive nano-composite catalyst according to claim 1, it is characterised in that the surface of addition Activating agent quality is the 0.5~10% of silver-colored source and sodium tungstate quality summation.
3. a kind of ultraviolet optical drive nano-composite catalyst according to claim 1, it is characterised in that live on the surface Property agent be polyethylene glycols or triton x-100 or Tween 80 or Sodium Polyacrylate or neopelex one kind.
4. a kind of ultraviolet optical drive nano-composite catalyst according to claim 1, it is characterised in that used light source For ultraviolet lamp, power is 8~15 watts.
CN201810353716.8A 2018-04-19 2018-04-19 A kind of ultraviolet optical drive nano-composite catalyst Pending CN108435172A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111167451A (en) * 2020-03-16 2020-05-19 上海纳米技术及应用国家工程研究中心有限公司 Preparation method of silver tungstate microcrystal ball cluster photocatalyst, product and application thereof
CN113509903A (en) * 2020-04-09 2021-10-19 石河子大学 Photostimulation response type material and preparation method and application thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106268805A (en) * 2016-08-17 2017-01-04 哈尔滨理工大学 A kind of silver wolframic acid nano silver wire and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106268805A (en) * 2016-08-17 2017-01-04 哈尔滨理工大学 A kind of silver wolframic acid nano silver wire and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WYLLAMANNEY DA SILVA PEREIRA等人: ""Elucidating the real-time Ag nanoparticle growth on a-Ag2WO4 during electron beam irradiation; experimental evidence and theoretical instghts",Phys.Chem.Chem.Phys.,2015, 17.5352-5359", 《PHYS.CHEM.CHEM.PHYS.》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111167451A (en) * 2020-03-16 2020-05-19 上海纳米技术及应用国家工程研究中心有限公司 Preparation method of silver tungstate microcrystal ball cluster photocatalyst, product and application thereof
CN113509903A (en) * 2020-04-09 2021-10-19 石河子大学 Photostimulation response type material and preparation method and application thereof
CN113509903B (en) * 2020-04-09 2022-06-28 石河子大学 Photostimulation response type material and preparation method and application thereof

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Application publication date: 20180824