CN101219377A - Precious metal/one-dimensional titanium dioxide nanostructure composite material and method for producing the same - Google Patents
Precious metal/one-dimensional titanium dioxide nanostructure composite material and method for producing the same Download PDFInfo
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- CN101219377A CN101219377A CNA2008100137511A CN200810013751A CN101219377A CN 101219377 A CN101219377 A CN 101219377A CN A2008100137511 A CNA2008100137511 A CN A2008100137511A CN 200810013751 A CN200810013751 A CN 200810013751A CN 101219377 A CN101219377 A CN 101219377A
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Abstract
The invention relates to a preparation method of a noble metal/ one-dimensional titanium dioxide nano structural compound material, belonging to preparation field of inorganic nano material, and the main components of the compound material are one-dimensional titanium dioxide nano material and nano noble metal particles. The invention contains the following detailed steps: 1) 0.01 to 0.1g one-dimensional titanium dioxide material is dispersed into 10 to 100ml water or alcohol and forms into a suspension; 2) the suspension is added with soluble noble metal salt and forms into a solution of 0.001 to 0.1M noble metal salt; 3) the mixed solution obtained by step 2) is radiated for 1 to 30min in an ultraviolet or high voltage mercury lamp or a fluorescent lamp; 4) the product obtained by the step 3) is centrifuged and cleaned, and the noble/ one-dimensional titanium dioxide nano structural compound material is prepared. The invention is characterized by no need of surfactant and simple technology.
Description
Technical field
The present invention relates to a kind of precious metal/one-dimensional titanium dioxide nanostructure composite material and preparation method thereof, belong to the inorganic nano material preparing technical field.
Background technology
Since Japanese scholar's Sumio Iijima in 1991 was found CNT, monodimension nanometer material had caused people's extensive concern.One-dimensional nano structure material, comprise nanometer rods, nano wire, nanometer band and nanotube etc., not only provide a desirable model with the size of material and the relation of dimension, and in the structure of nanoscale electronics and photoelectric device, played the part of extremely important role for we study electric transmission, mechanical performance etc.To the research of the research of low-dimension nano material, particularly one dimension or quasi-one-dimensional nanometer material, be considered to study the basis of other low-dimensional materials.Many characteristic properties that monodimension nanometer material had are found in succession and are reported that this is comprising superpower mechanical tenacity, high fluorescence efficiency, the enhancing of thermoelectricity capability and the reduction of Laser emission sudden strain of a muscle value etc.
Titanium dioxide has a multiple functional characteristic semi-conducting material as a kind of, aspect electronics, photocatalysis, opto-electronic conversion, air-sensitive and the biology sensor, solar cell etc. all has important use.In recent years, people adopt diverse ways to synthesize one-dimensional titanium dioxide nanostructure, for example: the hot method of hydrothermal/solvent, template, chemical vapour deposition technique, sol-gel process, electrochemical deposition method and microwave method.Than titania nanoparticles, one-dimensional titanium dioxide nanostructure possesses more wide application prospect.
Nanoscale precious metal (for example nanometer Au, Ag, Pt, Pd etc.) is subjected to people and more and more pays close attention to optics, electricity and the catalytic property of its uniqueness and at the application potential of biological field.The compound photocatalysis performance that can obviously improve titanium dioxide of nanometer precious metal/one-dimensional titanium dioxide nanostructure as the one-dimensional titanium dioxide nanostructure of carrier, also can improve the application of precious metal at catalytic field.Precious metal forms plasmon at the surface deposition of titanium oxide in addition, and potential application prospect will be arranged aspect solar cell.The preparation of at present relevant nanometer precious metal mainly is to utilize soluble metallic salt to adopt the method for electronation to make.And in its preparation process, often relate to additives such as organic surface active agent, reducing agent.
Summary of the invention
At present present Research, the invention provides a kind of without any need for surfactant, simple precious metal/one-dimensional titanium dioxide nanostructure composite material of technology and preparation method thereof.
Titanium dioxide is a kind of good photochemical catalyst, and under the irradiation of certain wavelength light, the electronics on the valence band will transit on the conduction band, thus (the h that on valence band, forms the hole
+), on conduction band, form electronics (e
-).The hole is a kind of strong oxidizer, and electronics is exactly a kind of good reducing agent.The reproducibility of this photo catalytic reduction technology conduction band electron is reduced into zero-valent metal with precious metal ion, and deposits to the surface of titanium dioxide.
A kind of precious metal/one-dimensional titanium dioxide nanostructure composite material, its key component are one-dimensional titanium dioxide nano material and nanometer precious metal particle.
A kind of preparation method of precious metal/one-dimensional titanium dioxide nanostructure composite material, concrete step of preparation process is as follows:
1) 0.01～0.1g one-dimensional titanium dioxide nano material is dispersed in 10～100ml water or the ethanol, forms monodimension nanometer material suspension;
2) in above-mentioned one-dimensional titanium dioxide nano material suspension, add solubility precious metal salt, form 0.001～0.1M precious metal salting liquid;
3) with step 2) in resultant mixed solution be placed on uviol lamp or high-pressure sodium lamp or fluorescent lamp irradiation 1～30min down;
4) with resultant product in the step 3), centrifugal, washing promptly can be arrived precious metal/one-dimensional titanium dioxide nanostructure composite material.
One-dimensional titanium dioxide nano material described in the step 1) is titanium dioxide nano thread, titania nanotube, titanium dioxide nano-belts, titanium dioxide nano-rod, ions doped titanium dioxide nano wire, ions doped titanium dioxide nanotube, ions doped titanium dioxide nanometer band or ions doped titanium dioxide nanometer rods.
Step 2) the solubility precious metal salt described in is silver nitrate or gold chloride or nitric acid gold or chloroplatinic acid or platinum nitrate or palladium bichloride or palladium nitrate.
Precious metal/the one-dimensional titanium dioxide nanostructure composite material that obtains in the step 4) is silver/titanium dioxide or gold/titanium dioxide or platinum/titanium dioxide or palladium/titanium dioxide and any two kinds or two or more alloy/one-dimensional titanium dioxide nanostructure composite material.
Utilize this method to prepare the method for precious metal/one-dimensional titanium dioxide nanostructure composite material, preparation technology is simple, without any need for outer doping, surfactant.Therefore pollution-free with the composite material surface cleaning of this kind method preparation.
This composite can be used widely in fields such as photocatalysis, catalysis and solar cells.
The present invention relates to the preparation method of a kind of precious metal/nanometer belt composite, also be applicable to the compound of some other conductor oxidate nanometer band and precious metal.
Description of drawings
Fig. 1 is titanium dioxide (TiO
2) the XRD figure spectrum of nanometer band.
Fig. 2 is ESEM (SEM) photo of typical titanium dioxide nano-belts
Fig. 3 is Nano Silver (Ag)/titanium dioxide (TiO
2) ESEM (SEM) photo.
Fig. 4 is nm of gold (Au)/titanium dioxide (TiO
2) ESEM (SEM) photo.
The specific embodiment
Embodiment 1:
The 0.17g silver nitrate is dissolved in 10 ml deionized water, adds the 0.01g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; At 20 watts of ultra violet lamp 1min, centrifugal at last, washing can obtain silver/titanium dioxide nanometer belt composite with resultant mixed solution.
Embodiment 2:
The 0.017g silver nitrate is dissolved in 10 ml deionized water, adds the 0.01g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; Resultant mixed solution is centrifugal at last at 20 watts of ultra violet lamp 1min., washing can obtain silver/titanium dioxide nanometer belt composite.
Embodiment 3:
The 0.034g silver nitrate is dissolved in 10 ml deionized water, adds the 0.01g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; At 20 watts of ultra violet lamp 1min, centrifugal at last, washing can obtain silver/titanium dioxide nanometer belt composite with resultant mixed solution.
Embodiment 4:
The 0.017g silver nitrate is dissolved in 10 milliliters of ethanol, adds the 0.01g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; At 20 watts of ultra violet lamp 1min, centrifugal at last, washing can obtain silver/titanium dioxide nanometer belt composite with resultant mixed solution.
Embodiment 5:
The 0.017g silver nitrate is dissolved in 10 milliliters of ethanol, adds the 0.05g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; At 20 watts of ultra violet lamp 1min, centrifugal at last, washing can obtain silver/titanium dioxide nanometer belt composite with resultant mixed solution.
Embodiment 6:
The 0.017g silver nitrate is dissolved in 10 milliliters of ethanol, adds the 0.1g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; At 20 watts of ultra violet lamp 1min, centrifugal at last, washing can obtain silver/titanium dioxide nanometer belt composite with resultant mixed solution.
Embodiment 7:
The 0.017g silver nitrate is dissolved in 10 milliliters of ethanol, adds the 0.01g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; Resultant mixed solution is centrifugal at last at 20 watts of ultra violet lamp 10min., washing can obtain silver/titanium dioxide nanometer belt composite.
Embodiment 8:
The 0.017g silver nitrate is dissolved in 10 milliliters of ethanol, adds the 0.01g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; At 20 watts of ultra violet lamp 30min, centrifugal at last, washing can obtain silver/titanium dioxide nanometer belt composite with resultant mixed solution.
Embodiment 9:
The 0.105g silver nitrate is dissolved in 50 milliliters of ethanol, adds the 0.05g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; At 20 watts of ultra violet lamp 5min, centrifugal at last, washing can obtain silver/titanium dioxide nanometer belt composite with resultant mixed solution.
Embodiment 10:
The 0.105g silver nitrate is dissolved in 100 milliliters of ethanol, adds the 0.1g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; At 20 watts of ultra violet lamp 2min, centrifugal at last, washing can obtain silver/titanium dioxide nanometer belt composite with resultant mixed solution.
Embodiment 11:
The 0.017g silver nitrate is dissolved in 10 ml deionized water, adds the 0.01g titanium dioxide nano-belts then, form nanometer band silver nitrate suspension; Resultant mixed solution is shone 1min under high-pressure sodium lamp, centrifugal at last, washing can obtain silver/titanium dioxide nanometer belt composite.
Embodiment 12:
In 10 milliliters of 0.01M aqueous solution of chloraurate, add the 0.01g titanium dioxide nano-belts, form nanometer band suspension; Resultant mixed solution is shone 10min under uviol lamp, centrifugal at last, washing can obtain gold/titanium dioxide nano-belts composite.
Embodiment 13:
In 10 milliliters of 0.05M aqueous solution of chloraurate, add the 0.01g titanium dioxide nano-belts, form nanometer band suspension; With resultant mixed solution under uviol lamp, shine 10min. centrifugal at last, the washing can obtain gold/titanium dioxide nano-belts composite.
Embodiment 13:
In 10 milliliters of 0.05M gold chloride ethanolic solutions, add the 0.01g titanium dioxide nano-belts, form nanometer band suspension; Resultant mixed solution is shone 10min under uviol lamp, centrifugal at last, washing can obtain gold/titanium dioxide nano-belts composite.
Embodiment 14:
In 10 milliliters of 0.05M nitric acid Jinsui River solution, add the 0.01g titanium dioxide nano-belts, form nanometer band suspension; Resultant mixed solution is shone 10min under uviol lamp.Centrifugal at last, washing can obtain gold/titanium dioxide nano-belts composite.
Embodiment 15:
In 10 milliliters of 0.05M chloroplatinic acid aqueous solutions, add the 0.01g titanium dioxide nano-belts, form nanometer band suspension; Resultant mixed solution is shone 10min under uviol lamp, centrifugal at last, washing can obtain platinum/titanium dioxide nano-belts composite.
Embodiment 16:
In 10 milliliters of 0.05M platinum nitrate aqueous solution, add the 0.01g titanium dioxide nano-belts, form nanometer band suspension; Resultant mixed solution is shone 10min under uviol lamp, centrifugal at last, washing can obtain platinum/titanium dioxide nano-belts composite.
Embodiment 17:
In 10 milliliters of 0.05M palladium nitrate aqueous solutions, add the 0.01g titanium dioxide nano-belts, form nanometer band suspension; Resultant mixed solution is shone 10min under uviol lamp, centrifugal at last, washing can obtain palladium/titanium dioxide nano-belts composite.
Embodiment 18:
In 10 milliliters of 0.05M palladium chloride aqueous solutions, add the 0.01g titanium dioxide nano-belts, form nanometer band suspension; With resultant mixed solution under uviol lamp, shine 10min. centrifugal at last, the washing can obtain palladium/titanium dioxide nano-belts composite.
Embodiment 19:
The 0.17g silver nitrate is dissolved in 10 ml deionized water, adds the 0.01g titania nanotube then, form nanotube silver nitrate suspension; At 20 watts of ultra violet lamp 1min, centrifugal at last, washing can obtain the silver/titanium dioxide nanometer tube composite materials with resultant mixed solution.
Embodiment 20:
The 0.17g silver nitrate is dissolved in 10 ml deionized water, adds the 0.01g titanium dioxide nano-rod then, form nanometer rods silver nitrate suspension; At 20 watts of ultra violet lamp 1min, centrifugal at last, washing can obtain the silver/titanium dioxide nanometer rod composite material with resultant mixed solution.
Embodiment 21:
The 0.17g silver nitrate is dissolved in 10 ml deionized water, adds the 0.01g titanium dioxide nano thread then, form nano wire silver nitrate suspension; At 20 watts of ultra violet lamp 1min, centrifugal at last, washing can obtain silver/titanium dioxide nano wire composite with resultant mixed solution.
Embodiment 22:
The 0.17g silver nitrate is dissolved in 10 ml deionized water, adds 0.01g then and mix the lanthanum ion titanium dioxide nano thread, form nano wire silver nitrate suspension; Resultant mixed solution is shone 20min at fluorescent lamp, and centrifugal at last, washing can obtain silver/doped titanium dioxide nano line composite.
Claims (5)
1. a precious metal/one-dimensional titanium dioxide nanostructure composite material is characterized in that, its key component is one-dimensional titanium dioxide nano material and nanometer precious metal particle.
2. the preparation method of a precious metal/one-dimensional titanium dioxide nanostructure composite material is characterized in that, concrete step of preparation process is as follows:
1) 0.01～0.1g one-dimensional titanium dioxide nano material is dispersed in 10～100ml water or the ethanol, forms one-dimensional titanium dioxide nano material suspension;
2) in above-mentioned one-dimensional titanium dioxide nano material suspension, add solubility precious metal salt, form 0.001～0.1M precious metal salting liquid;
3) with step 2) in resultant mixed solution be placed on uviol lamp or high-pressure sodium lamp down or fluorescent lamp irradiation 1～30min;
4) with resultant product in the step 3), centrifugal, washing promptly can be arrived precious metal/one-dimensional titanium dioxide nanostructure composite material.
3. the preparation method of a kind of precious metal/one-dimensional titanium dioxide nanostructure composite material as claimed in claim 2, it is characterized in that the one-dimensional titanium dioxide nano material described in the step 1) is titanium dioxide nano thread, titania nanotube, titanium dioxide nano-belts, titanium dioxide nano-rod, ions doped titanium dioxide nano wire, ions doped titanium dioxide nanotube, ions doped titanium dioxide nanometer band or ions doped titanium dioxide nanometer rods.
4. the preparation method of a kind of precious metal/one-dimensional titanium dioxide nanostructure composite material as claimed in claim 2, it is characterized in that step 2) described in solubility precious metal salt be silver nitrate or gold chloride or nitric acid gold or chloroplatinic acid or platinum nitrate or palladium nitrate or palladium bichloride.
5. the preparation method of a kind of precious metal/one-dimensional titanium dioxide nanostructure composite material as claimed in claim 2, it is characterized in that the precious metal/one-dimensional titanium dioxide nanostructure composite material that obtains in the step 4) is silver/titanium dioxide or gold/titanium dioxide or platinum/titanium dioxide or palladium/titanium dioxide and any two kinds or two or more alloy/one-dimensional titanium dioxide nanostructure composite material.
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| CN101780403B (en) * | 2009-01-19 | 2012-07-11 | 中国科学院化学研究所 | Method for preparing metal/titanium dioxide composite material |
| CN102642809A (en) * | 2012-04-27 | 2012-08-22 | 中国科学院理化技术研究所 | Organic nanowire/metal nano particle composite nano material and preparation method thereof |
| CN103007932A (en) * | 2012-12-11 | 2013-04-03 | 山东大学 | Method for preparing titanium dioxide nanobelt load thermometal integral catalyst |
| CN102130342B (en) * | 2010-01-19 | 2013-04-10 | 中国科学院化学研究所 | Noble metal-titanium dioxide nano fiber complex and preparation method and application thereof |
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