CN106391010A - Ag/BaTiO3 nanotube array heterogeneous photocatalysis structure and preparation method thereof - Google Patents

Ag/BaTiO3 nanotube array heterogeneous photocatalysis structure and preparation method thereof Download PDF

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CN106391010A
CN106391010A CN201610847532.8A CN201610847532A CN106391010A CN 106391010 A CN106391010 A CN 106391010A CN 201610847532 A CN201610847532 A CN 201610847532A CN 106391010 A CN106391010 A CN 106391010A
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preparation
barium
batio
nano
solution
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CN106391010B (en
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陈智慧
李志伟
杨亚
邱建华
丁建宁
袁宁
袁宁一
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Changzhou University
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Changzhou 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
    • B01J23/38Catalysts 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
    • B01J23/66Silver or gold
    • 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

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Abstract

The invention discloses a Ag/BaTiO3 nanotube array heterogeneous photocatalysis structure and a preparation method thereof. The method comprises the steps that dual-pass porous anodized aluminum is adopted as a template, silver nitrate is adopted as a stabilizer of Ti(OC4H9)4, and a barium titanate nanotube array is prepared; a solvent evaporation method is adopted for loading silver nanoparticles on the surface of the barium titanate nanotube array. The barium titanate nanotube array structure is adopted, a charge carrier dispersion path is lengthened, and light induced electron-hole recombination are reduced; meanwhile, by means of the unique surface plasma resonance effect and good electrical conductivity of the Ag nanometer material, the Ag/BaTiO3 nanotube array heterogeneous photocatalysis material is constructed, and the light induced electron-hole separation efficiency is improved.

Description

A kind of Ag/BaTiO3Heterogeneous photocatalyst structure of nano-tube array and preparation method thereof
Technical field
The present invention relates to a kind of Ag/BaTiO3Heterogeneous photocatalyst structure of nano-tube array and preparation method thereof, belongs to nanometer Technical field of material and photocatalysis technology field.
Background technology
Barium metatitanate. is a kind of typical Ferroelectrics, BaTiO for many years3Applied research focus primarily upon transducing The fields such as device, sensing element and capacitor.Preparation to nm-class barium titanate material is predominantly nanocrystalline, and in addition also Barium metatitanate. is received Rice rod, thin film etc..In recent years it has been found that BaTiO3It is also a class photocatalyst as perofskite type oxide, in ultraviolet light Or equally can produce light induced electron and photohole under radiation of visible light, this makes it before photocatalysis field has a wide range of applications Scape, Barium metatitanate. proposes new requirement in the application of photocatalysis field to its pattern.Nano-tube array structure can make electric charge carry Flow sub- the evolving path to be elongated, overcome conventional metal oxides light induced electron and hole easily occurs compound shortcoming.Anodic oxygen Changing aluminum alloy pattern plate method is to prepare the common method of nano-tube array, but this method is subject to the confinement of template to act on, and ion is in mould Board channel internal diffusion speed is slow, path length, and the response time is long, and the response time is long to be easily caused template deformation, fracture, reactant Hydrolyze.
Content of the invention
The invention aims to overcoming the deficiencies in the prior art, a kind of Ag/BaTiO is proposed3Nano-tube array is heterogeneous Photocatalyst structure and preparation method thereof, to promoting, Barium metatitanate. is significant in the application of photocatalysis field.
Realizing the technical solution that the object of the invention adopted is:A kind of Ag/BaTiO3The heterogeneous light of nano-tube array is urged Change structure and preparation method thereof, its step is:
A, by anodic oxidation aluminium formwork 5wt% phosphoric acid dip, removes the fine and close alumina barrier layer in bottom, obtains bilateral Porous alumina formwork;Bilateral porous alumina formwork is inserted vertically into reactor central authorities and fixes, so that template will be reacted Device is isolated into equal two parts and forms two-way reaction device it is ensured that the reactant of both sides only passes through bilateral porous alumina formwork phase Counterdiffusion;Add Ti (OC in the side of two-compartment reactor4H9)4And silver nitrate solution;Two-compartment reactor opposite side add with Ti(OC4H9)4Isoconcentration, isopyknic barium nitrate solution, the pH value of both sides solution all controls in 4-6;Stand 4-10 in atmosphere Hour;Take out template, by clean for surface wipes and drying under infrared lamp, then with 5 DEG C of intensifications per minute in Muffle furnace Ramp is incubated 1 hour to 750 DEG C, is made annealing treatment.Remove unnecessary anode in product with the NaOH solution of 2mol/L Characterization of Barium Titanate Nanotubes array is obtained after alumina formwork (AAO template);
Characterization of Barium Titanate Nanotubes array powder prepared by step a is dissolved in deionized water by b, and ultrasonic agitation 30min forms concentration Barium metatitanate. suspension for 0.5g/L-2g/L;
Barium metatitanate. suspension is mixed by c with silver nitrate solution, 1 hour post-heating of ultrasonic agitation to moisture evaporating completely, and At 450 DEG C, calcining obtains Ag/BaTiO3The heterogeneous photocatalyst structure of nano-tube array.
Wherein, the aperture of the anodic oxidation aluminium formwork described in step a is 50-200nm, described Ti (OC4H9)4And nitric acid The concentration of barium solution is 0.01M, silver nitrate solution and Ti (OC4H9)4The mol ratio of solution is 1:10;
Silver nitrate described in step c is (0.1-1) with the mol ratio of Barium metatitanate.:100.
The present invention compared with prior art has the advantage that:The present invention with the ordered porous alumina of bilateral as template, Bilateral porous alumina formwork is inserted vertically into reactor central authorities and fixes, make template that reactor is isolated into equal two Divide and form two-way reaction device it is ensured that the reactant of both sides only passes through bilateral porous alumina formwork phase counterdiffusion;In dual chamber reaction Device both sides each lead into Ti (OC4H9)4And barium nitrate, achieve mutual expansion in template duct for the ion in the short period of time Dissipate it is therefore prevented that alumina formwork caves in, ruptures.Using silver nitrate as stabilizer, add Ti (OC4H9)4Solution, delay gelating Time, obtain colloidal sol steady in a long-term it is ensured that reaction terminates front Ti (OC4H9)4Presented in colloidal sol, do not flocculate, not water Solution.
In addition, the present invention considers Ti (OC4H9)4Hold with the difference of viscosity in aqueous medium for the barium nitrate and diffusion rate Easily make product nonstoichiometry ratio, adopt concentration offsets method first, add Ti (OC4H9)4While add silver nitrate molten Liquid, controls final product to realize preferable stoichiometric proportion it is achieved that multiple cation is equal in duct in same time Even diffusion, thus ensure that the microstructure of product, electric property and photocatalysis characteristic.
The Characterization of Barium Titanate Nanotubes array structure of present invention preparation can elongate the evolving path of electric charge carrier, reduces photoproduction Electronics and hole-recombination;Simultaneously present invention utilizes the unique surface plasma resonance effect that has of Ag nano material and Good electric conductivity, builds Ag/BaTiO3The heterogeneous catalysis material of nano-tube array, improves the separation of photo-generate electron-hole Efficiency.
Specific embodiment
The present invention is described in further detail with reference to embodiment:
Embodiment 1:
By the aperture 5wt% phosphoric acid dip of the anodic oxidation aluminium formwork for 50nm, remove the fine and close aluminium oxide barrier in bottom Layer, obtains the porous alumina formwork of bilateral;Bilateral porous alumina formwork is inserted vertically into reactor central authorities and fixes, make Reactor is isolated into equal two parts and forms two-way reaction device by template;Add the Ti of 0.01M in the side of two-compartment reactor (OC4H9)4Silver nitrate solution with 0.001M;Add 0.01M and Ti (OC in the opposite side of two-compartment reactor4H9)4Isopyknic Barium nitrate solution, the pH value of both sides solution all controls in 4-6;Stand 4-10 hour in atmosphere;Take out template, by surface wipes Dry totally and under infrared lamp, then in Muffle furnace, rise to 750 DEG C of temperature with 5 DEG C of heating rates per minute and be incubated 1 hour, Made annealing treatment.Removed with the NaOH solution of 2mol/L and after unnecessary AAO template in product, obtain Characterization of Barium Titanate Nanotubes array;Institute The Characterization of Barium Titanate Nanotubes array powder of preparation is dissolved in deionized water, and ultrasonic agitation 30min forms the Barium metatitanate. that concentration is 1.0g/L Suspension;According to Ag and BaTiO3Mol ratio be 0.1:100 ratio, Barium metatitanate. suspension is mixed with silver nitrate solution, 1 hour post-heating of ultrasonic agitation is to moisture evaporating completely, and calcining obtains Ag/BaTiO at 450 DEG C3Nano-tube array is heterogeneous Photocatalyst structure.
Embodiment 2:
By the aperture 5wt% phosphoric acid dip of the anodic oxidation aluminium formwork for 50nm, remove the fine and close aluminium oxide barrier in bottom Layer, obtains the porous alumina formwork of bilateral;Bilateral porous alumina formwork is inserted vertically into reactor central authorities and fixes, make Reactor is isolated into equal two parts and forms two-way reaction device by template;Add the Ti of 0.01M in the side of two-compartment reactor (OC4H9)4Silver nitrate solution with 0.001M;Add 0.01M and Ti (OC in the opposite side of two-compartment reactor4H9)4Isopyknic Barium nitrate solution, the pH value of both sides solution all controls in 4-6;Stand 4-10 hour in atmosphere;Take out template, by surface wipes Dry totally and under infrared lamp, then in Muffle furnace, be warming up to 750 DEG C with 5 DEG C of heating rates per minute and be incubated 1 hour, Made annealing treatment.Removed with the NaOH solution of 2mol/L and after unnecessary AAO template in product, obtain Characterization of Barium Titanate Nanotubes array;Institute The Characterization of Barium Titanate Nanotubes array powder of preparation is dissolved in deionized water, and ultrasonic agitation 30min forms the Barium metatitanate. that concentration is 1.0g/L Suspension;According to Ag and BaTiO3Mol ratio be 0.5:100 ratio, Barium metatitanate. suspension is mixed with silver nitrate solution, 1 hour post-heating of ultrasonic agitation is to moisture evaporating completely, and calcining obtains Ag/BaTiO at 450 DEG C3Nano-tube array is heterogeneous Photocatalyst structure.
Embodiment 3:
By the aperture 5wt% phosphoric acid dip of the anodic oxidation aluminium formwork for 50nm, remove the fine and close aluminium oxide barrier in bottom Layer, obtains the porous alumina formwork of bilateral;Bilateral porous alumina formwork is inserted vertically into reactor central authorities and fixes, make Reactor is isolated into equal two parts and forms two-way reaction device by template;Add the Ti of 0.01M in the side of two-compartment reactor (OC4H9)4Silver nitrate solution with 0.001M;Add 0.01M and Ti (OC in the opposite side of two-compartment reactor4H9)4Isopyknic Barium nitrate solution, the pH value of both sides solution all controls in 4-6;Stand 4-10 hour in atmosphere;Take out template, by surface wipes Dry totally and under infrared lamp, then in Muffle furnace, be warming up to 750 DEG C with 5 DEG C of heating rates per minute and be incubated 1 hour, Made annealing treatment.Removed with the NaOH solution of 2mol/L and after unnecessary AAO template in product, obtain Characterization of Barium Titanate Nanotubes array;Institute The Characterization of Barium Titanate Nanotubes array powder of preparation is dissolved in deionized water, and ultrasonic agitation 30min forms the Barium metatitanate. that concentration is 1.0g/L Suspension;According to Ag and BaTiO3Mol ratio be 1:100 ratio, Barium metatitanate. suspension is mixed with silver nitrate solution, surpasses Sound stirs 1 hour post-heating to moisture evaporating completely, and calcining obtains Ag/BaTiO at 450 DEG C3The heterogeneous light of nano-tube array Catalytic structure.
Comparative example 1:
By the aperture 5wt% phosphoric acid dip of the anodic oxidation aluminium formwork for 50nm, remove the fine and close aluminium oxide barrier in bottom Layer, obtains the porous alumina formwork of bilateral;And bilateral porous alumina formwork is loaded in the middle of reactor, and fixing, will react Device is isolated into two parts and forms two-compartment reactor;Add the Ti (OC of 0.01M in the side of two-compartment reactor4H9)4;Anti- in dual chamber The opposite side answering device adds 0.01M and Ti (OC4H9)4Isopyknic barium nitrate solution, the pH value of both sides solution all controls in 4-6; Stand 4-10 hour in atmosphere.Standing finds Ti (OC after 8 hours4H9)4Flocculent deposit occurs, remaining experimental procedure is with real Apply example 1.The Ag/BaTiO that will obtain after calcining3The heterogeneous photocatalyst structure of nano-tube array adopts discharge plasma atomic spectrum (ICP) measure atomic ratio, find that Ba, Ti mol ratio is more than 1, declaratives Ti4+There occurs hydrolysis, incomplete and barium ionss React, make Barium metatitanate. deviate from stoichiometric proportion, Barium metatitanate. nonstoichiometry ratio will be to the microstructure of product, electricity Learn performance and photocatalysis characteristic produces important impact.

Claims (4)

1. a kind of Ag/BaTiO3The preparation method of the heterogeneous photocatalyst structure of nano-tube array it is characterised in that:Described preparation method Comprise the steps:
A, by the anodic oxidation aluminium formwork in 50-200nm aperture 5wt% phosphoric acid dip, removes the fine and close aluminium oxide barrier in bottom Layer, obtains the porous alumina formwork of bilateral;Bilateral porous alumina formwork is inserted vertically into reactor central authorities and fixes, make Reactor is isolated into equal two parts and forms two-way reaction device it is ensured that the reactant of both sides only passes through bilateral porous oxygen by template Change aluminum alloy pattern plate phase counterdiffusion;Add silver nitrate solution and Ti (OC in the side of two-compartment reactor4H9)4Solution;In two-compartment reactor Opposite side add with Ti (OC4H9)4Isoconcentration, isopyknic barium nitrate solution, the pH value of both sides solution all controls in 4-6;? In the air stands;After taking out template, surface wipes are dried totally and under infrared lamp, then made annealing treatment;Use 2mol/L NaOH solution remove after unnecessary alumina formwork in product to obtain Characterization of Barium Titanate Nanotubes array;
Characterization of Barium Titanate Nanotubes array powder prepared by step a is dissolved in deionized water by b, and ultrasonic agitation 30min forms concentration and is The Barium metatitanate. suspension of 0.5g/L-2g/L;
Barium metatitanate. suspension is mixed by c with silver nitrate solution, 1 hour post-heating of ultrasonic agitation to moisture evaporating completely, and 450 At DEG C, calcining obtains Ag/BaTiO3The heterogeneous photocatalyst structure of nano-tube array.
2. Ag/BaTiO as claimed in claim 13The preparation method of the heterogeneous photocatalyst structure of nano-tube array it is characterised in that: Silver nitrate solution described in step a and Ti (OC4H9)4The mol ratio of solution is 1:10, Ti (OC4H9)4Dense with barium nitrate solution Spend for 0.01M.
3. Ag/BaTiO as claimed in claim 13The preparation method of the heterogeneous photocatalyst structure of nano-tube array it is characterised in that: In the air time of repose described in step a is:4-10 hour, annealing condition is:With 5 DEG C of liters per minute in Muffle furnace Warm ramp is incubated 1 hour to 750 DEG C.
4. Ag/BaTiO as claimed in claim 13The preparation method of the heterogeneous photocatalyst structure of nano-tube array it is characterised in that: Silver nitrate described in step c is (0.1-1) with the mol ratio of Barium metatitanate.:100.
CN201610847532.8A 2016-09-26 2016-09-26 A kind of Ag/BaTiO3Heterogeneous photocatalyst structure of nano-tube array and preparation method thereof Active CN106391010B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113713813A (en) * 2021-08-31 2021-11-30 四川大学 Ag NWs@BaTiO3Core-sheath composite piezoelectric photocatalytic material and preparation method and application thereof
CN118059860A (en) * 2024-04-07 2024-05-24 重庆市鲁渝矿业发展有限公司 Preparation method and application of porous barium titanate composite material

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US20050036939A1 (en) * 2003-08-11 2005-02-17 Stanislaus Wong Hydrothermal synthesis of perovskite nanotubes
CN1690257A (en) * 2004-04-30 2005-11-02 中国科学技术大学 La1-XPbXMnO3 compound ordered nano-line array and method for preparing same
CN101279767A (en) * 2008-04-28 2008-10-08 哈尔滨工业大学 Preparation of lanthanide series rare-earth doped bismuth titanate nano-tube
CN102251232A (en) * 2011-07-18 2011-11-23 同济大学 Method for preparing silver nanowire array in ordered porous alumina template

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050036939A1 (en) * 2003-08-11 2005-02-17 Stanislaus Wong Hydrothermal synthesis of perovskite nanotubes
CN1690257A (en) * 2004-04-30 2005-11-02 中国科学技术大学 La1-XPbXMnO3 compound ordered nano-line array and method for preparing same
CN101279767A (en) * 2008-04-28 2008-10-08 哈尔滨工业大学 Preparation of lanthanide series rare-earth doped bismuth titanate nano-tube
CN102251232A (en) * 2011-07-18 2011-11-23 同济大学 Method for preparing silver nanowire array in ordered porous alumina template

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113713813A (en) * 2021-08-31 2021-11-30 四川大学 Ag NWs@BaTiO3Core-sheath composite piezoelectric photocatalytic material and preparation method and application thereof
CN118059860A (en) * 2024-04-07 2024-05-24 重庆市鲁渝矿业发展有限公司 Preparation method and application of porous barium titanate composite material

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