CN105664950B - A kind of porous nano ZnFe2O4Preparation method - Google Patents

A kind of porous nano ZnFe2O4Preparation method Download PDF

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CN105664950B
CN105664950B CN201610008270.6A CN201610008270A CN105664950B CN 105664950 B CN105664950 B CN 105664950B CN 201610008270 A CN201610008270 A CN 201610008270A CN 105664950 B CN105664950 B CN 105664950B
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znfe
zinc
stirring
template
ferric
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CN105664950A (en
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刘福生
曹佳伟
陈佳鑫
王小庆
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Nanjing Forestry University
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Nanjing Forestry University
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    • 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
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/80Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with zinc, cadmium or mercury
    • B01J35/39
    • B01J35/60

Abstract

The invention discloses a kind of porous nano ZnFe2O4Preparation method, this method mixes molysite, zinc salt with deionized water, stirring and dissolving obtains the mixed solution of molysite and zinc salt, alkali is mixed with deionized water, stirring and dissolving obtains aqueous slkali, the mixed solution of molysite and zinc salt is added dropwise in aqueous slkali under stirring, to the reaction was complete, product is washed and is centrifugally separating to obtain ZnFe for stirring after dripping2O4Colloidal sol;By ZnFe2O4Colloidal sol is mixed with deionized water, after being disperseed with ultrasonic wave, add organic solvent and sublimable compound template, by the hot method of aqueous organic solvent mixed solvent after the reaction was complete, product is through being distilled off mixed solvent, fired again, cooling, grinding, washing, filtering, dry and grinding technics process, that is, obtain porous nano ZnFe2O4Powder.This method is simple for process, and investment is small, is conducive to promote and apply.

Description

A kind of porous nano ZnFe2O4Preparation method
Technical field
The present invention relates to a kind of porous nano ZnFe2O4Preparation method, belong to field of photocatalytic material.
Background technology
With the quickening of process of industrialization, energy crisis and environmental crisis getting worse, the exploitation of renewable new energy is standby It is concerned.Solar energy is inexhaustible, nexhaustible, pollution-free, cheap, world community can as a kind of clean energy resource The energy freely utilized peacefully, and various regenerative resources for example biomass energy, wind energy, ocean energy, water can etc. other energy it This.National governments all attach great importance to the exploitation of regenerative resource, and regenerative resource is the hot research field that various countries invest energetically.
Photochemical catalyst is the semi-conducting material of a kind of utilization solar energy indispensability.At present, by scientists study Semiconductor light-catalyst species is various, such as TiO2、CdS、SrTiO3、RuO2, ZnO and Fe2O3Deng.ZnFe2O4Partly led as one kind Body photochemical catalyst, has the characteristics that good stability, indissoluble, environmental-friendly, band gap is narrow, aboundresources and application cost are low, especially When being with other semiconductors couplings, photocatalytic activity can be effectively improved, is one of the photochemical catalyst that application prospect is had an optimistic view of.
The structure of material and performance are closely related, structures shape performance, and the controllable preparation of material structure is material science neck The hot research direction in domain, is the important means for preparing high performance material.Grinding on nano material controllable method for preparing at present It is many to study carefully report.Since Penner in 1987 et al. proposes the template synthesis method of nano material, template is because having work Skill is simple and convenient to operate, low power consumption and other advantages, is had received widespread attention.Using template, by varying template diameter and Other technological parameters can obtain the controllable nano material of shapes and sizes.Nanocrystalline, nano thin-film is had been used at present, is partly led The preparation of the materials such as body, nanotube and nano wire, has consequence in field of nano material preparation, becomes preparation high-performance The important means of nano material.
ZnFe2O4Nanosizing and porous are to improve ZnFe2O4One of effective ways of photocatalysis efficiency.Prepare porous receive Rice ZnFe2O4Can use template, template mainly have microemulsion template, emulsion template, ionic surfactant template, it is non-from Subtype surfactant templates, block copolymer template, composition template (such as polyoxyethylene lauryl ether and polyethylene glycol) With monodisperse polymer particles template etc..Pass through solgel reaction, ZnFe2O4Colloidal sol forms bone with secondary bond and template action Frame structure, then takes solvent extraction or high-temperature roasting method to remove template, so as to obtain the hole suitable with template size.But It is to prepare porous nano ZnFe using above-mentioned traditional template2O4When, template is either removed using roasting method or extraction All there are major defect.When roasting method removes template, since the temperature of template to be eliminated is high, caving in for duct can be caused, makes system Into porous nano ZnFe2O4Semiconductor light-catalyst surface defect is too many, becomes the complex centre of electron-hole, reduces light and urges Change efficiency.Extraction rule is difficult to thoroughly eliminate template so that porous nano ZnFe2O4The purity of semiconductor light-catalyst reduces, and leads Photocatalysis performance is caused to decline.Therefore, how to prepare duct without cave in, surface zero defect, template noresidue and high-specific surface area Porous nano ZnFe2O4Semiconductor light-catalyst is an important topic.
Easily removed since sublimate easily distils, the present invention is by using the appropriate compound of sublimation temperature Template prepares ZnFe2O4Colloidal sol, reheating make template distillation removing can be prepared by porous nano ZnFe2O4.With traditional template Compare, the present invention use sublimate for template can preparation structure is controllable, duct without cave in, surface zero defect, template noresidue and The big porous nano ZnFe of specific surface area2O4Semiconductor light-catalyst.At present, on being prepared by template of sublimable compound Porous nano ZnFe2O4The method of semiconductor light-catalyst is there is not yet document report, is porous nano ZnFe2O4Preparation open up One new way, has an important practical significance.
The content of the invention
A kind of porous nano ZnFe of the present invention2O4Preparation method, there is provided it is a kind of with molysite, zinc salt, alkali, go from Sub- water is raw material, and ZnFe is prepared by stirring reaction2O4Colloidal sol;ZnFe2O4Colloidal sol is after ultrasonic disperse, by certain ratio Example adds organic solvent and sublimable compound template, and after the hot method reaction of water-organic solvent mixed solvent, product is through steaming Distillation removes mixed solvent, heats removing sublimable compound template, cooling, washing, drying and grinding technics process, i.e., Obtain porous nano ZnFe2O4
A kind of porous nano ZnFe of the present invention2O4Preparation method, obtained porous nano ZnFe2O4, can Light and sunlight are seen under conditions of light source, to can be directly used for photocatalysis degradation organic contaminant and photocatalytic hydrogen production by water decomposition, Also the photochemical catalyst of active higher by the method with other semiconductors couplings, can further be made, in visible ray and sunlight Under conditions of light source, for photocatalysis degradation organic contaminant and photocatalytic hydrogen production by water decomposition;
A kind of porous nano ZnFe of the present invention2O4Preparation method, adopt the following technical scheme that:
1st, it is by the mass percent of molysite, zinc salt, alkali, deionized water, organic solvent and sublimable compound template (0.001%~70%): (0.00001%~70%): (0.001%~75%): (0.001%~90%): (0.001%~ 90%): the ratio of (0.001%~90%), by a meromict of molysite, zinc salt and the total dosage of deionized water, stirring and dissolving obtains To molysite and the mixed solution of zinc salt, by another meromict of alkali and the total dosage of deionized water, stirring and dissolving obtains aqueous slkali, stirs The lower mixed solution by molysite and zinc salt is mixed to be added dropwise in aqueous slkali, continue after dripping stirring reaction 1~24h, product pass through from The heart separates and washing operation and in triplicate, then is centrifugally separating to obtain ZnFe2O4Colloidal sol;By ZnFe2O4Colloidal sol and deionized water After the ratio mixing that mass ratio is 1: 2~20, disperseed with the ultrasonic wave that frequency is 20KHz~1MHz, power is 30W~15KW 0.1h~24h, adds organic solvent and sublimable compound template, by water-hot method of organic solvent mixed solvent 100 0.5~24h is reacted at~250 DEG C, product heats up after mixed solvent is distilled off by 0.5~3 DEG C per minute of programming rate To 400~650 DEG C, heat 0.5~24h and remove sublimable compound template, then through cooling down, grinding, washing, filtering, Dry and grinding technics process, that is, obtain porous nano ZnFe2O4Powder.
2nd, a kind of porous nano ZnFe of the present invention2O4Preparation method, its outstanding feature is:Using traditional Microemulsion template, emulsion template, ionic surfactant template, nonionic surface active agent template, block copolymer mould Plate, composition template (such as polyoxyethylene lauryl ether and polyethylene glycol) and monodisperse polymer particles template template, lead to Crossing solgel reaction makes ZnFe2O4Colloidal sol forms skeleton structure with secondary bond and template action, then take solvent extraction or When high-temperature roasting method removes template, all there are major defect, duct is such as caused to cave in, surface defect, specific surface area are low and template The problems such as residual, reduce photocatalysis efficiency;Compared with traditional template, during using sublimate as template, sublimate easily distils and holds Easily eliminate, therefore, ZnFe is prepared for template by using the appropriate compound of sublimation temperature2O4Colloidal sol, reheats processing and removes liter Magnificent thing template can be prepared by structure-controllable, duct without cave in, surface zero defect, template noresidue and specific surface area are big porous receives Rice ZnFe2O4, be conducive to improve photocatalysis efficiency.
3rd, a kind of porous nano ZnFe of the present invention2O4Preparation method, the molysite for reacting used be ferric trichloride, Any of ferric bromide, ferric sulfate, ferric nitrate, ferric formate, ferric acetate, ironic citrate and tartaric acid iron are a variety of.
4th, a kind of porous nano ZnFe of the present invention2O4Preparation method, the zinc salt for reacting used is zinc chloride, bromine Change any of zinc, zinc sulfate, zinc nitrate, zinc formate and zinc acetate or a variety of.
5th, a kind of porous nano ZnFe of the present invention2O4Preparation method, the alkali for reacting used is lithium hydroxide, hydrogen Any of sodium oxide molybdena, potassium hydroxide, ammonium hydroxide and barium hydroxide are a variety of.
6th, a kind of porous nano ZnFe of the present invention2O4Preparation method, react sublimable compound mould used Plate is in 1,4-benzoquinone, melamine, iodine, hexa, camphor, anthraquinone, naphthalene, anthracene, metaformaldehyde and triethylamine hydrochloride It is any one or more.
7th, a kind of porous nano ZnFe of the present invention2O4Preparation method, the organic solvent for reacting used be methanol, Ethanol, isopropanol, ether, isopropyl ether, formic acid, acetic acid, dichloromethane, chloroform, carbon tetrachloride, acetone, cyclohexanone, Methylethyl Any of ketone, benzene, toluene, methyl acetate, ethyl acetate, propyl acetate and isopropyl acetate are a variety of.
8th, a kind of porous nano ZnFe of the present invention2O4Preparation method, porous nano ZnFe2O4Preparation process In used ultrasonic disperser frequency be 20KHz~1MHz, power be 30W~15KW.
Embodiment
Here is a kind of porous nano ZnFe of the present invention2O4Preparation method non-limiting example.These examples Be only given for illustrative purposes, limitation of the invention can not be interpreted as.Because the essence of the present invention is not being departed from God can carry out many conversion with the basis of scope to the present invention.In these embodiments, unless stated otherwise, it is all Percentage is all referring to mass percent.
Embodiment 1
Porous nano ZnFe2O4Preparation:
According to above-mentioned mass percent, by ferric trichloride, ferric bromide, zinc sulfate, zinc bromide and the total dosage of deionized water One meromict, stirring and dissolving obtains the mixed solution of ferric trichloride, ferric bromide, zinc sulfate and zinc bromide, by potassium hydroxide with going Another meromict of the total dosage of ionized water, stirring and dissolving obtain potassium hydroxide solution, by ferric trichloride, ferric bromide, sulphur under stirring The mixed solution of sour zinc and zinc bromide is added dropwise in potassium hydroxide solution, continues stirring reaction 1h after dripping, product is through centrifugation Separation and washing operation and in triplicate, then it is centrifugally separating to obtain ZnFe2O4Colloidal sol;By ZnFe2O4The matter of colloidal sol and deionized water After amount is than the ratio mixing for 1: 10, disperse 1.5h with the ultrasonic wave that frequency is 28KHz, power is 2KW, add isopropanol, benzene, After anthraquinone and hexa, 12h is reacted at 150 DEG C by water-hot method of organic solvent mixed solvent, product is removed through distillation After removing solvent, 500 DEG C are warming up to by 1 DEG C per minute of programming rate, heats 8h at 500 DEG C, removes anthraquinone and six methylenes After the sublimable compound template of urotropine, then through cooling down, grinding, washing, filtering, dry and grinding technics process, that is, obtain Porous nano ZnFe2O4Powder.
Embodiment 2
Porous nano ZnFe2O4Preparation:
According to above-mentioned mass percent, by the one of ferric nitrate, ferric formate, zinc chloride and zinc nitrate and the total dosage of deionized water Meromict, stirring and dissolving obtain the mixed solution of ferric nitrate, ferric formate, zinc chloride and zinc nitrate, by sodium hydroxide and deionization Another meromict of the total dosage of water, stirring and dissolving obtain sodium hydroxide solution, under stirring by ferric nitrate, ferric formate, zinc chloride and The mixed solution of zinc nitrate is added dropwise in sodium hydroxide solution, continues stirring reaction 2.5h after dripping, and product is centrifuged With washing operation and in triplicate, then it is centrifugally separating to obtain ZnFe2O4Colloidal sol;By ZnFe2O4The mass ratio of colloidal sol and deionized water After 1: 8 ratio mixing, disperse 1.5h with the ultrasonic wave that frequency is 68KHz, power is 3KW, add ethanol, toluene, to benzene After quinone and camphor, 10h is reacted at 160 DEG C by water-hot method of organic solvent mixed solvent, product after solvent is distilled off, 550 DEG C are warming up to by 0.5 DEG C per minute of programming rate, heats 6h at 550 DEG C, 1,4-benzoquinone is removed and camphor is sublimable After compound template, then through cooling down, grinding, washing, filtering, dry and grinding technics process, that is, obtain porous nano ZnFe2O4 Powder.
Embodiment 3
Porous nano ZnFe2O4Preparation:
According to above-mentioned mass percent, by ferric sulfate, ironic citrate, zinc chloride and zinc acetate and the total dosage of deionized water One meromict, stirring and dissolving obtain the mixed solution of ferric sulfate, ironic citrate, zinc chloride and zinc acetate, by lithium hydroxide and hydrogen Barium monoxide and another meromict of the total dosage of deionized water, stirring and dissolving obtain lithium hydroxide and barium hydroxide mixed solution, stir Mix the lower mixed solution by ferric sulfate, ironic citrate, zinc chloride and zinc acetate be added dropwise to lithium hydroxide and barium hydroxide mixing it is molten In liquid, continue stirring reaction 3h after dripping, product is centrifuged with washing operation and in triplicate, then is centrifugally separating to obtain ZnFe2O4Colloidal sol;By ZnFe2O4With frequency it is 40KHz, work(after the ratio mixing that colloidal sol and the mass ratio of deionized water are 1: 7 The ultrasonic wave that rate is 1.5KW disperses 1.5h, after adding ethyl acetate, methyl ethyl ketone, acetone, naphthalene, metaformaldehyde and anthracene, passes through Water-hot method of organic solvent mixed solvent reacts 5h at 170 DEG C, and product is after being distilled off solvent, by 1.5 DEG C per minute of liter Warm speed is warming up to 520 DEG C, heats 7h at 520 DEG C, after removing naphthalene, metaformaldehyde and the sublimable compound template of anthracene, Again through cooling down, grinding, washing, filtering, dry and grinding technics process, that is, obtain porous nano ZnFe2O4Powder.
Embodiment 4
Porous nano ZnFe2O4Preparation:
According to above-mentioned mass percent, by ferric acetate, ferric trichloride, zinc formate and zinc sulfate and the total dosage of deionized water One meromict, stirring and dissolving obtains the mixed solution of ferric acetate, ferric trichloride, zinc formate and zinc sulfate, by sodium hydroxide with going Another meromict of the total dosage of ionized water, stirring and dissolving obtain sodium hydroxide solution, by ferric acetate, ferric trichloride, first under stirring The mixed solution of sour zinc and zinc sulfate is added dropwise in sodium hydroxide solution, continue after dripping stirring reaction 1.5h, product pass through from The heart separates and washing operation and in triplicate, then is centrifugally separating to obtain ZnFe2O4Colloidal sol;By ZnFe2O4Colloidal sol and deionized water After the mixing of ratio that mass ratio is 1: 12, disperse 1.0h with the ultrasonic wave that frequency is 50KHz, power is 2.5KW, add ethanol, After methyl acetate and anthracene, 5.5h is reacted at 180 DEG C by water-hot method of organic solvent mixed solvent, product is molten through being distilled off After agent, 560 DEG C are warming up to by 2 DEG C per minute of programming rate, heats 6h at 560 DEG C, removes the sublimable compound of anthracene After template, then through cooling down, grinding, washing, filtering, dry and grinding technics process, that is, obtain porous nano ZnFe2O4Powder.

Claims (4)

  1. A kind of 1. porous nano ZnFe2O4Preparation method, it is characterised in that:By trivalent iron salt, divalent zinc salt, alkali, deionization The mass percent of water, organic solvent and sublimable compound template is (13.0%~17.8%): (4.6%~7.7%): (8.9%~18.0%): (37.7%~50.4%): (15.0%~20.0%): the ratio of (2.0%~4.0%), by trivalent One meromict of molysite, divalent zinc salt and the total dosage of deionized water, stirring and dissolving obtain the mixing of trivalent iron salt and divalent zinc salt Solution, by another meromict of alkali and the total dosage of deionized water, stirring and dissolving obtains aqueous slkali, by trivalent iron salt and two under stirring The mixed solution of valency zinc salt is added dropwise in aqueous slkali, continues stirring 1~24h of reaction after dripping, and product is centrifuged and washes Operation and in triplicate is washed, then is centrifugally separating to obtain ZnFe2O4Colloidal sol;By ZnFe2O4Colloidal sol and the mass ratio of deionized water are 1: 2~20 ratio is by the deionized water separately taken and ZnFe2O4After colloidal sol mixing, with frequency be 20KHz~1MHz, power be 30W~ The ultrasonic wave of 15KW disperses 0.1h~24h, adds organic solvent and sublimable compound template, is mixed by water-organic solvent The hot method of bonding solvent reacts 0.5~24h at 100~250 DEG C, and product is after being distilled off mixed solvent, by per minute 0.5~3 DEG C programming rate be warming up to 400~650 DEG C, heat 0.5~24h and remove sublimable compound template, then through cooling, Grinding, washing, filtering, dry and grinding technics process, that is, obtain porous nano ZnFe2O4Powder;
    Wherein, the sublimable compound template for reacting used be 1,4-benzoquinone, melamine, iodine, hexa, camphor, Any of anthraquinone, naphthalene, anthracene, metaformaldehyde and triethylamine hydrochloride are a variety of;
    Wherein, the organic solvent for reacting used be methanol, ethanol, isopropanol, ether, isopropyl ether, formic acid, acetic acid, dichloromethane, Chloroform, carbon tetrachloride, acetone, cyclohexanone, methyl ethyl ketone, benzene, toluene, methyl acetate, ethyl acetate, propyl acetate and acetic acid Any of isopropyl ester is a variety of.
  2. 2. the preparation method described in claim 1, it is characterised in that the trivalent iron salt for reacting used be ferric trichloride, ferric bromide, Any of ferric sulfate, ferric nitrate, ferric formate, ferric acetate, ironic citrate and tartaric acid iron are a variety of.
  3. 3. the preparation method described in claim 1, it is characterised in that the divalent zinc salt for reacting used is zinc chloride, zinc bromide, sulphur Any of sour zinc, zinc nitrate, zinc formate and zinc acetate are a variety of.
  4. 4. the preparation method described in claim 1, it is characterised in that the alkali for reacting used is lithium hydroxide, sodium hydroxide, hydrogen-oxygen Change any of potassium, ammonium hydroxide and barium hydroxide or a variety of.
CN201610008270.6A 2016-01-04 2016-01-04 A kind of porous nano ZnFe2O4Preparation method Expired - Fee Related CN105664950B (en)

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TWI607032B (en) * 2017-01-18 2017-12-01 美樺興業股份有限公司 Three - dimensional porous structure of parylene
CN107486163A (en) * 2017-08-23 2017-12-19 苏州安特实业有限公司 A kind of composite type foreign smell adsorbent and preparation method thereof
KR102223471B1 (en) * 2017-12-26 2021-03-04 주식회사 엘지화학 Method for preparing zinc ferrite catalysts and zinc ferrite catalysts prepared thereof
CN108855202A (en) * 2018-06-05 2018-11-23 上海交通大学 For photocatalytic water and the composite photo-catalyst of contaminant degradation and preparation method thereof
CN108940291A (en) * 2018-07-06 2018-12-07 武汉霖泉环保科技有限公司 A kind of preparation method and applications of zinc ferrite magnetic photocatalyst
CN109292829B (en) * 2018-10-22 2021-06-29 安庆泽远化工有限公司 Porous nano CoFe2O4Process for preparing nanoparticles
CN109589984B (en) * 2018-12-12 2021-11-23 江苏大学 Preparation method and application of double-reaction-channel photocatalyst

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JPH04321522A (en) * 1991-04-18 1992-11-11 Fuji Elelctrochem Co Ltd Production of manganese-zinc-based ferrite
JP2001270701A (en) * 2000-03-28 2001-10-02 Yutaka Tamaura Decomposition method of water
CN1673098A (en) * 2005-03-24 2005-09-28 上海大学 Prepn process of nanometer spinel type ZnFe2O4
CN105126855A (en) * 2015-07-15 2015-12-09 浙江大学 ZnO/ZnFe2O4/C nano-structure hollow spheres and preparation method of same

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JPH04321522A (en) * 1991-04-18 1992-11-11 Fuji Elelctrochem Co Ltd Production of manganese-zinc-based ferrite
JP2001270701A (en) * 2000-03-28 2001-10-02 Yutaka Tamaura Decomposition method of water
CN1673098A (en) * 2005-03-24 2005-09-28 上海大学 Prepn process of nanometer spinel type ZnFe2O4
CN105126855A (en) * 2015-07-15 2015-12-09 浙江大学 ZnO/ZnFe2O4/C nano-structure hollow spheres and preparation method of same

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