CN102294211A - Preparation method for TaOx@Ta2O5 core-shell nanometer particle - Google Patents
Preparation method for TaOx@Ta2O5 core-shell nanometer particle Download PDFInfo
- Publication number
- CN102294211A CN102294211A CN2011102364723A CN201110236472A CN102294211A CN 102294211 A CN102294211 A CN 102294211A CN 2011102364723 A CN2011102364723 A CN 2011102364723A CN 201110236472 A CN201110236472 A CN 201110236472A CN 102294211 A CN102294211 A CN 102294211A
- Authority
- CN
- China
- Prior art keywords
- core
- tao
- taox
- ta2o5
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a preparation method for TaOx@Ta2O5 core-shell nanometer particles. The method comprises the following steps: immersing a simple tantalum target material in anhydrous ethanol, and ablating the simple tantalum target material for half an hour by using Nd:YAG pulsed laser so as to obtain a colloidal solution of TaOx@Ta2O5; carrying out centrifugation and drying to obtain TaOx@Ta2O5. The method provided in the invention has the following advantages: the short preparation period is short, experimental equipment is simple, the prepared colloidal solution is very stable, etc. The unnormal method enables a stably existing TaOx@Ta2O5 core-shell structure nanometer granular material to be obtained, and the material with the core-shell structure is more favorable for separation between photoinduced electrons and photoinduced holes and enables composition of the two to be reduced, thereby effectively improving photocatalytic activity of the material.
Description
Technical field
The present invention relates to a kind of TaO
xTa
2O
5The preparation method of core-shell nano particle.
Background technology
Because Ta
2O
5Have good chemical stability and heat endurance, and characteristics such as fusing point height, have wide practical use in the fields such as degraded, sewage disposal and photolysis water hydrogen of pigment.Yet, because semi-conductor type metal oxide Ta
2O
5In the light-catalyzed reaction process, have bigger energy gap (3.9 eV), photocatalysis response only can be arranged in the ultra-violet (UV) band, to sunshine to absorb efficient lower.Given this, people have adopted a lot of methods to Ta
2O
5Carry out modification to promote its performance.Mainly contain following three kinds: one, regulate shape, pattern have influenced its performance to a great extent, by the regulation and control of pattern, and then improve its performance.Two, mix, mix and reduced its energy gap on the one hand, improved absorption and utilization, can promote separating of light induced electron and photohole effectively on the other hand, reduce their recombination probability, improve photocatalytic activity visible light.Three, modify, modification mainly can make photohole-duplet effectively separate, thereby improves its performance.To Ta
2O
5Mix and modify report mainly contain solid reaction process and cold plasma treatment technology.
Summary of the invention
The object of the present invention is to provide a kind of TaO
xTa
2O
5The preparation method of core-shell nano particle.
The present invention adopts following technical scheme to achieve these goals:
TaO
xTa
2O
5The preparation method of core-shell nano particle is characterized in that may further comprise the steps:
Tantalum simple substance target is immersed in the absolute ethyl alcohol, adopts the Nd:YAG pulse laser, wavelength is 1064 nm, and energy is 85-95 mJ, and ablation tantalum simple substance target 25-35 minute obtains TaO
XTa
2O
5Colloidal solution; Centrifugal, drying obtains TaO
xTa
2O
5
Described TaO
xTa
2O
5The preparation method of core-shell nano particle is characterized in that: described Nd:YAG pulse laser wavelength is 1064 nm, and energy is 90 mJ.
Described TaO
xTa
2O
5The preparation method of core-shell nano particle is characterized in that: the rotation that target does not stop together with bottom support bracket in the process of ablating.
Beneficial effect of the present invention:
The inventive method has advantages such as manufacturing cycle is short, and experimental provision is simple, and the colloidal solid of preparation is highly stable; By XRD material phase analysis, SEM and TEM Electronic Speculum and electron spectrum structure, constituent analysis, proved that synthetic product is the TaO of nucleocapsid structure
xTa
2O
5Nano composite material, and have the Ta of photocatalytic activity
2O
5Shell has only 2-3 nm thick, moves to the catalyst granules surface apace thereby more help light induced electron, and TaO
xExistence also can reduce light induced electron-hole to compound probability, therefore be expected to obtain with respect to pure Ta
2O
5The photocatalysis efficiency that nano particle is higher.
Description of drawings
Fig. 1 TaO
xTa
2O
5Core-shell nano structure building-up process schematic diagram.
The XRD figure of sample behind Fig. 2 laser ablation.
Fig. 3 TaO
xTa
2O
5The scanning electron microscopy of nuclear shell structure nano particle (SEM) picture (a), transmission electron microscopy (TEM) picture (b), the high-resolution TEM picture (c) of single nucleocapsid structure and corresponding to the partial enlarged drawing (d) of (c) figure.
Fig. 4 TaO
xTa
2O
5The surperficial phenetic analysis of the x-ray photoelectron spectroscopy of nuclear shell structure nano particle (XPS).
The specific embodiment
Embodiment 1:TaO
xTa
2O
5The preparation method of core-shell nano particle may further comprise the steps:
Tantalum simple substance target is immersed in the 13-18 mL absolute ethyl alcohol, adopts the Nd:YAG pulse laser, wavelength is 1064 nm, and energy is 90 mJ, and ablation tantalum simple substance target 30 minutes obtains TaO
XTa
2O
5Colloidal solution; Centrifugal, drying obtains TaO
xTa
2O
5, the rotation that target does not stop together with bottom support bracket in the process of ablating.
Embodiment 2:As shown in Figure 1, Fig. 1 is TaO
xTa
2O
5Core-shell nano structure building-up process schematic diagram; Fig. 2 is the X-ray material phase analysis diffraction pattern (XRD) of products therefrom, can see that from scheming to go up us most XRD diffraction maximum comes from TaO, has only a peak to belong to Ta
2The O phase.Fig. 3 a be the SEM figure of product, product is made up of the nano particle of a large amount of even size distribution as can be seen, Fig. 3 b is low power TEM figure, by Fig. 3 b as can be known, product is spherical nano particle, particle size is about 30 nm, can see that particle is a nucleocapsid structure, Fig. 3 c is the high-resolution electron micrograph image (HRTEM) of typical single particle, and clearly, products therefrom is the nano spherical particle of nucleocapsid structure, and inside is that the surface of crystallization then is amorphous amorphous, Fig. 3 d is the partial enlarged drawing of single particle, and by calculating, interplanar distance 0.256 nm and 0.240 nm value be (111) face and the Ta of corresponding TaO respectively
2(220) interplanar distance of O in order further to determine surface-element and electronics valence state thereof, has been carried out the surperficial phenetic analysis of x-ray photoelectron spectroscopy (XPS) to products therefrom, as shown in Figure 4, Fig. 4 a is the full spectrogram of photoelectron spectroscopy, has clearly demonstrated Ta, O, the binding energy of C element.Binding energy 26.01 eV and 28.02 eV belong to Ta4f respectively among Fig. 4 b
7/2And Ta4f
5/2Electron orbit, can determine it is the tantalum ion of pentavalent by looking into the xps energy spectrum handbook, the O1s valence band spectrum clearly is made up of three peaks among Fig. 4 c, handle by swarming, binding energy belongs to the binding energy of Ta-O key at 530.38 eV, two other binding energy can be owing to the binding energy of surface contamination and C-O key, and the atomic ratio of O and Ta is near 2.5:1, thus we to draw the surface be that composition is Ta
2O
5We draw the TaO that product is a nucleocapsid structure comprehensive XRD, TEM and XPS
xTa
2O
5Nano composite material.For TaO
xTa
2O
5The core-shell nano material formation mechanism, we think, in the liquid laser ablation process, after beam of laser and the interaction of solid tantalum target, will cause the material surface evaporation, produce superhigh temperature, the super-pressure plasma, this plasma that comprises various high density free radicals just can form at laser action 60 ns, its temperature can be up to 6000K, its local pressure can be up to 1GPa, the local plasmon body is with ultrasonic outside adiabatic expansion then, while and surrounding environment take place to interact and violent chemical reaction, thus cooling fast, cohesion, until burying in oblivion of plasma.Under this extreme condition, various physics, chemical reaction will take place in induced with laser various atoms, molecule, ion, group that produce and that liquid medium provided at a terrific speed, thereby cause the growth and the assembling of novel metastable nanostructured.
TaO
xTa
2O
5The formation of core-shell nano structure can simply be divided into 4 steps: 1) at first after a branch of pulsed laser irradiation is to the simple substance tantalum target, moment produces the plasma of HTHP high density tantalum on solid/liquid interfaces; 2) plasma of tantalum because of the confinement effect of its HTHP and ethanol medium with adiabatic expansion, simultaneously the temperature of its edge begins to reduce, and causes the generation of tantalum cluster; 3) in the process that plasma is buried in oblivion, after tantalum cluster and ethanol interact, form TaO and Ta with metastable phase
2O; 4) because the oxide TaO of low price tantalum
xUnstable meeting continues dissolved oxygen or oxidation of ethanol, thereby has formed stable Ta on the surface
2O
5Shell, chemical reaction related in this process is:
The localized regions of elevated temperature high pressure extreme environment that produces in the liquid laser ablation process provides unique reaction condition for the interaction of tantalum cluster and ethanol molecule.
Claims (3)
1.TaO
xTa
2O
5The preparation method of core-shell nano particle is characterized in that may further comprise the steps:
Tantalum simple substance target is immersed in the absolute ethyl alcohol, adopts the Nd:YAG pulse laser, wavelength is 1064 nm, and energy is 85-95 mJ, and ablation tantalum simple substance target 25-35 minute obtains TaO
XTa
2O
5Colloidal solution; Centrifugal, drying obtains TaO
xTa
2O
5
2. TaO according to claim 1
xTa
2O
5The preparation method of core-shell nano particle is characterized in that: described Nd:YAG pulse laser wavelength is 1064 nm, and energy is 90 mJ.
3. TaO according to claim 1
xTa
2O
5The preparation method of core-shell nano particle is characterized in that: the rotation that target does not stop together with bottom support bracket in the process of ablating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110236472 CN102294211B (en) | 2011-08-17 | 2011-08-17 | Preparation method for TaOx@Ta2O5 core-shell nanometer particle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110236472 CN102294211B (en) | 2011-08-17 | 2011-08-17 | Preparation method for TaOx@Ta2O5 core-shell nanometer particle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102294211A true CN102294211A (en) | 2011-12-28 |
| CN102294211B CN102294211B (en) | 2013-10-09 |
Family
ID=45355027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110236472 Expired - Fee Related CN102294211B (en) | 2011-08-17 | 2011-08-17 | Preparation method for TaOx@Ta2O5 core-shell nanometer particle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102294211B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429644A (en) * | 2008-03-21 | 2009-05-13 | 中国科学院上海硅酸盐研究所 | Production method of metal or metal oxide nano particle |
| CN102134095A (en) * | 2011-04-21 | 2011-07-27 | 浙江理工大学 | Method for preparing titanium dioxide nanoparticles with core-shell structure |
-
2011
- 2011-08-17 CN CN 201110236472 patent/CN102294211B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429644A (en) * | 2008-03-21 | 2009-05-13 | 中国科学院上海硅酸盐研究所 | Production method of metal or metal oxide nano particle |
| CN102134095A (en) * | 2011-04-21 | 2011-07-27 | 浙江理工大学 | Method for preparing titanium dioxide nanoparticles with core-shell structure |
Non-Patent Citations (1)
| Title |
|---|
| PEISHENG LIU, WEIPING CAI,* AND HAIBO ZENG: "Fabrication and Size-Dependent Optical Properties of FeO Nanoparticles Induced by Laser Ablation in a Liquid Medium", 《J. PHYS. CHEM. C》, vol. 112, no. 9, 2 December 2008 (2008-12-02), pages 3261 - 3266 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102294211B (en) | 2013-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Huang et al. | Bifunctional Au@ TiO2 core–shell nanoparticle films for clean water generation by photocatalysis and solar evaporation | |
| Li et al. | Mesoporous black TiO2/MoS2/Cu2S hierarchical tandem heterojunctions toward optimized photothermal-photocatalytic fuel production | |
| Yang et al. | Graphene-based standalone solar energy converter for water desalination and purification | |
| Zou et al. | MoS2/RGO hybrids prepared by a hydrothermal route as a highly efficient catalytic for sonocatalytic degradation of methylene blue | |
| Chen et al. | Laser-synthesized rutile TiO2 with abundant oxygen vacancies for enhanced solar water evaporation | |
| Arutanti et al. | Influences of porous structurization and Pt addition on the improvement of photocatalytic performance of WO3 particles | |
| Wang et al. | Co3O4 nanoforest/Ni foam as the interface heating sheet for the efficient solar-driven water evaporation under one sun | |
| CN102189271B (en) | Method for preparing Ag/TiO2 nano composite material | |
| Lv et al. | Structure design, controllable synthesis, and application of metal-semiconductor heterostructure nanoparticles | |
| Ren et al. | Synthesis and Photo‐Thermal Conversion Properties of Hierarchical Titanium Nitride Nanotube Mesh for Solar Water Evaporation | |
| Zhang et al. | TiO2 single crystal with four‐truncated‐bipyramid morphology as an efficient photocatalyst for hydrogen production | |
| CN101239391B (en) | Method for coating metal nano granule by laser synthesizing carbon | |
| Zhao et al. | Construction and enhanced efficiency of Z-scheme-based ZnCdS/Bi2WO6 composites for visible-light-driven photocatalytic dye degradation | |
| CN107115880A (en) | A kind of MoS2/CNTs/g C3N4 composite photo-catalysts and preparation method thereof | |
| Zhao et al. | Facile synthesis and catalytic property of porous tin dioxide nanostructures | |
| An et al. | Studies on mass production and highly solar light photocatalytic properties of gray hydrogenated-TiO2 sphere photocatalysts | |
| Sun et al. | Development of novel highly stable synergistic quaternary photocatalyst for the efficient hydrogen evolution reaction | |
| Cheng et al. | Easily repairable and high-performance carbon nanostructure absorber for solar photothermoelectric conversion and photothermal water evaporation | |
| CN109012733A (en) | A kind of g-C3N4Coat the preparation method of the nuclear shell structure nano compound of metal | |
| Chakrabartty et al. | Greener nanomaterials and their diverse applications in the energy sector | |
| CN101693552A (en) | Method for preparing tin dioxide nanostructure material with floriform appearance by hydrothermal synthesis | |
| Zhao et al. | Efficient photoreduction of carbon dioxide into carbon-based fuels: a review | |
| Yang et al. | One-pot pyrolysis and enhanced efficient solar evaporation of Cu/Cu2O/biochar | |
| CN102294211B (en) | Preparation method for TaOx@Ta2O5 core-shell nanometer particle | |
| CN102515285A (en) | Preparation method of cobalt sulfide nanocrystalline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20150817 |
|
| EXPY | Termination of patent right or utility model |