CN1297484C - Process for preparing one-dimensional nano tin dioxide material - Google Patents
Process for preparing one-dimensional nano tin dioxide material Download PDFInfo
- Publication number
- CN1297484C CN1297484C CNB2005100211198A CN200510021119A CN1297484C CN 1297484 C CN1297484 C CN 1297484C CN B2005100211198 A CNB2005100211198 A CN B2005100211198A CN 200510021119 A CN200510021119 A CN 200510021119A CN 1297484 C CN1297484 C CN 1297484C
- Authority
- CN
- China
- Prior art keywords
- preparing
- solution
- gel
- sncl
- dimensional structure
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention discloses a method for preparing nanometer SnO2 materials with a one-dimensional structure. The present invention has the preparation process flow that SnC1<4>*5H2O is prepared into solution and is added with ammonia water for forming deposition; chloride ions are removed by washing in a centrifugal mode; oxalic acid is added to the solution so as to form sol which forms gel by aging; a target product is finally obtained by drying and sintering the gel. The present invention has the technical scheme that nanometer SnO2 materials with a one-dimensional structure and high purity are prepared by controlling kinetics factors of chemical reaction. The invention has the advantages of simple preparing technology, mild reaction condition, low cost of raw materials and equipment, etc. The nanometer SnO2 materials with a one-dimensional structure prepared by the method of the present invention have an application prospect in the aspects of gas sensors with high sensitivity, transparent electrodes, etc.
Description
Technical Field
The invention belongs to the technical field of nano oxide semiconductor materials, and particularly relates to a method for preparing one-dimensional SnO2The method of (1).
Background
SnO2The semiconductor material is a wide-bandgap semiconductor material, is widely used as a gas sensor, and has some unique properties, such as high conductivity, high transmittance, good chemical and thermal stability, etc., which can be applied to many technical fields, including solar cells, liquid crystal displays, photodetectors, protective coatings, etc. Due to the nano SnO2Because of having larger specific surface area and higher activity, the nano-silver particles have wide application prospect in the aspects of gas sensitivity, electric conduction and photosensitive absorption. Recently, SnO with one-dimensional structure is concerned due to unique physical properties and potential application prospect2(nanowires or nanobelts) are favored. It has been shown that SnO has a one-dimensional structure2Has extremely high gas-sensitive property and good thermal stability, and not only has high gas-sensitive property to CO and NO as environmental pollution gases2The method has very high sensitivity, can analyze ethanol, and can be used for food control and breath atmosphere detection. For example, with a single SnO under UV irradiation2The sensor made of the nanobelt can detect NO with ppm level at room temperature2And has the advantages of small volume, rapidness, sensitivity and the like.
Reported preparation of SnO2Methods for nanomaterials are numerous, but mainly involve molten salt methods and gas phase evaporation methods.
Molten salt method with nano SnO2The powder is used as a precursor, KCl is used as a molten salt medium, and the nano wire rod can be obtained by annealing treatment at 800 ℃. The limitation of this approach is that the precursor particles must be small enough that nanowires are not available if the particle size exceeds 100 nm.
The vapor phase evaporation method uses Sn, SnO and SnO2Or their mixture as starting material, the tube furnace is first evacuated to 1X 10-3About torr, argon and oxygen are filled according to a certain proportion, and thenThe raw material is vaporized at high temperature in a tube furnace, the vaporization temperature is different according to the raw material, if pure SnO is used2As raw material, the evaporation temperature is above 1300 ℃. The raw material vapor is carried by argon gas and deposited on the single crystal Al2O3Single crystal LaAlO3Or a single crystal Si substrate, the substrate temperature being maintained at 900 deg.C-950 deg.C. The method can obtain nano SnO with various structures such as nano wires, nano belts, nano particles and the like2A material. The vapor phase evaporation method requires high temperature, vacuum and other process conditions, requires a raw material with a purity of 99.9% or more, and requires a single crystal substrate, so that the equipment and production costs are expensive.
Therefore, how to develop a method for preparing nano SnO with one-dimensional structure, which has the advantages of simple equipment requirement, mild reaction condition,cheap and easily-obtained raw materials and capability of realizing large-scale production2The method of material is an urgent problem to be solved.
The sol-gel method is a wet chemical method, and compared with other methods, the method has the advantages of simple equipment, good chemical uniformity of the product, high purity, convenient doping or co-doping, and capability of preparing large-area films.
So far, the sol-gel method for preparing nano SnO with one-dimensional structure is not seen2And (5) research reports of materials.
Disclosure of Invention
The invention aims to provide a method for preparing one-dimensional nano SnO, which has the advantages of simple equipment requirement, mild reaction condition, cheap and easily obtained raw materials and capability of realizing large-scale production2A method of making a material.
The specific technical scheme of the invention is to prepare high-purity nano SnO with a one-dimensional structure by controlling the kinetic factors of chemical reaction2A material.
The specific preparation steps are shown in figure 1:
first, prepare SnCl4An aqueous solution. Using SnCl4·5H2Dissolving O as raw material in distilled water to obtain SnCl with certain concentration4Solution and adjusting the P of the solution with a weak acidH value, and the PH value of the mixture is controlled to be between 1 and 2. In order to obtain high purity SnO2High purity SnCl should be used4·5H2O starting material, preferably analytically pure SnCl4·5H2O; the purpose of adjusting pH with weak acid is to prevent SnCl4And (4) hydrolyzing.
Secondly, adding ammonia water until the pH value of the solution is between 7 and 8, and reacting to generate Sn (OH)4And (4) precipitating. The ammonia water is preferably added in a slow dropwise manner while stirring, and the whole reaction process is preferably carried out at a temperature of about 50 ℃.
Third, take out Sn (OH)4The precipitate was washed by centrifugation. Using a centrifugal device, mixing Sn (OH)4The precipitate was washed centrifugally to remove Sn (OH)4The chloride ions adsorbed on the precipitate can be washed with AgNO3The solution was checked and no new precipitate (AgCl) was produced, and the centrifugation wash process could be terminated.
The three steps can be summarized as preparing Sn (OH)4Raw materials, in the actual production process, other direct or indirect methods can also be adopted to prepare Sn (OH)4。
Fourthly, preparation of Sn (OH)4And (3) sol. A reaction product of Sn (OH)4Adding into oxalic acid solution, controlling pH value at 1-2, controlling temperature at about 50 deg.C, ultrasonically dispersing, and stirring to form Sn (OH)4And (3) sol.
And fifthly, forming gel. And aging the sol prepared in the fourth step for 24-48h to form gel.
Sixthly, drying and grinding. And (4) drying the gel obtained in the fifth step for 5-8h at the temperature of more than 100 ℃, removing adsorbed water, and grinding the obtained product into powder.
And seventhly, drying and sintering. Mixing the powder obtained in the sixth step (Sn (OH)1) Sintering at 250-500 deg.C to make it lose water content, recrystallizing to obtain target product (SnO)2). The chemical reaction that takes placetherein is:
the essence of the invention is thatPreparing nano SnO with one-dimensional structure by sol-gel method under environment2A material.
The invention has the beneficial effects that:
the rutile type SnO can be successfully prepared by a sol-gel method2One-dimensional structure, fig. 2 is the X-ray diffraction pattern of the sample obtained through the above steps, all the diffraction peaks correspond to the rutile phase, no diffraction peak of the hetero-phase is found, which shows that the purity of the sample obtained by the present invention is very high. Nano SnO prepared by the invention2Has abundant morphological structure, which is similar to the structure obtained by a gas phase evaporation method. It not only contains nano-rods and spherical nano-particles (as shown in FIG. 3), but also contains SnO with one-dimensional structure2(as shown in fig. 4). The nano-rod has a diameter of about 40nm, a length of about 400nm, a nano-particle size of about 10nm, and a one-dimensional structure of SnO2The width is about 40 nanometers and the length is at least in the micrometer range.
The sol-gel method provided by the invention is used for preparing SnO with one-dimensional structure2The method has the advantages of simple preparation process, mild reaction conditions and low cost of raw materials and equipment, so the method has great popularization and application values.
Drawings
FIG. 1 is a schematic view of the process of the present invention;
FIG. 2 shows nano SnO2X-ray diffraction patterns of (a);
FIG. 3 is SnO2Transmission electron microscope photographs of nanorods and nanoparticles;
FIG. 4 is SnO2Transmission electron microscope photographs of one-dimensional structures;
Detailed Description
Will analyze pure SnCl4·5H2Dissolving O in distilled water (pH value is adjusted to 1-2 with hydrochloric acid or citric acid to prevent hydrolysis) to obtain 0.5mol/l solution, heating to about 50 deg.C, maintaining constant temperature, adding 28% ammonia water under vigorous stirringAnd controlling the dropping speed to be about 1ml/min until the pH of the solution is about 7-8 to form a precipitate. The precipitate was washed centrifugally to remove chloride ions (with 0.5mol/l AgNO)3Solution inspection), adding oxalic acid solution to adjust the pH value to 1-2, performing ultrasonic dispersion, heating to about 50 ℃ under vigorous stirring to form sol, aging the sol for 24-48h to form gel, drying the gel at 100 ℃ for 5-8h, and sintering the gel in a resistance furnace at 250-500 ℃ for 0.5-1h to obtain the target product. XRD is used for analyzing the phase of a sample, Transmission Electron Microscopy (TEM) is used for analyzing the appearance of the sample, X-ray photoelectron spectroscopy (XPS) is used for analyzing the chemical components of the sample, and ultraviolet-visible light absorption spectrum is used for measuring the forbidden bandwidth of the sample.
Claims (3)
1. A method for preparing a one-dimensional nano tin dioxide material is characterized by comprising the following steps:
1) preparing SnCl4Aqueoussolution
Using SnCl4·5H2Dissolving O as raw material in distilled water to obtain SnCl with certain concentration4Adjusting the pH value of the solution to be between 1 and 2 by weak acid;
2) adding ammonia water until the pH value of the solution is between 7 and 8, and reacting to generate Sn (OH)4Precipitating;
3) taking out Sn (OH)4Precipitating, and centrifugally washing the precipitate
Using a centrifugal device, mixing Sn (OH)4The precipitate was washed centrifugally to remove Sn (OH)4Precipitating the adsorbed chloride ions;
4) preparation of Sn (OH)4Sol gel
A reaction product of Sn (OH)4Adding into oxalic acid solution, controlling pH value between 1-2, controlling temperature at 50 deg.C, ultrasonically dispersing, and stirring to form Sn (OH)4Sol;
5) forming a gel
Aging the sol prepared in the step four for 24-48h to form gel;
6) drying and grinding
Drying the gel obtained in the fifth step for 5-8h at the temperature of more than 100 ℃, removing the adsorbed water, and grinding the obtained product into powder;
7) drying and sintering
The Sn (OH) obtained in the sixth step4Sintering the powder at 250-500 ℃, and obtaining the nano SnO with a one-dimensional structure through thermal decomposition and recrystallization2A material.
2. The method for preparing one-dimensional nano tin dioxide material according to claim 1, wherein analytically pure SnCl is adopted in the step 1)4·5H2O; the weak acid is dilute hydrochloric acid or citric acid; the concentration of the solution was 0.5 mol/l.
3. The method for preparing one-dimensional nano tin dioxide material according to claim 1, wherein in the reaction process of the step 2), the reaction temperature is controlled at 50 ℃, and stirring measures are taken; the ammonia water is added in a slow dropping mode, and the concentration of the ammonia water is 28 percent.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2005100211198A CN1297484C (en) | 2005-06-21 | 2005-06-21 | Process for preparing one-dimensional nano tin dioxide material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2005100211198A CN1297484C (en) | 2005-06-21 | 2005-06-21 | Process for preparing one-dimensional nano tin dioxide material |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1724383A CN1724383A (en) | 2006-01-25 |
CN1297484C true CN1297484C (en) | 2007-01-31 |
Family
ID=35924037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB2005100211198A Expired - Fee Related CN1297484C (en) | 2005-06-21 | 2005-06-21 | Process for preparing one-dimensional nano tin dioxide material |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN1297484C (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100365170C (en) * | 2005-12-01 | 2008-01-30 | 华中师范大学 | SnO2 monodisperse nano monocrystal with square structure and synthesis method thereof |
CN100386844C (en) * | 2006-03-08 | 2008-05-07 | 浙江理工大学 | Method for preparing tin dioxide quantal-point |
CN100391850C (en) * | 2006-05-16 | 2008-06-04 | 云南大学 | One dimensional Nano material of SnO2+ Nano bar doped by Zn2+ or Cd2+, and application |
CN1935666B (en) * | 2006-10-19 | 2010-05-26 | 天津大学 | Tin dioxide nano material preparing method |
CN101323463B (en) * | 2007-06-12 | 2010-11-03 | 赣州瑞德化工有限公司 | Production process of high pure superfine tin oxide |
CN101144176B (en) * | 2007-07-17 | 2010-11-17 | 北京航空航天大学 | Method for reducing metal and alloy hydroxide gel by hydrogen separated from electrochemistry cathode |
CN101306835B (en) * | 2008-04-22 | 2010-06-02 | 华东师范大学 | SnO2 complex three-dimensional nanostructure and method for preparing same |
CN101704505B (en) * | 2009-12-03 | 2012-08-22 | 中国科学院宁波材料技术与工程研究所 | Method for preparing high-thermostability tin oxide nano-powder on Ca-doped basis |
CN102080261B (en) * | 2010-12-15 | 2012-11-21 | 哈尔滨师范大学 | Method for synthesizing porous SnO2 nano-wire harness |
CN102583265A (en) * | 2012-02-09 | 2012-07-18 | 西北工业大学 | Method for preparing coralline tin oxide nanoparticles |
CN102863018A (en) * | 2012-08-30 | 2013-01-09 | 云南锡业股份有限公司 | Preparation method of nanometer tin dioxide particles |
CN103232062A (en) * | 2013-05-07 | 2013-08-07 | 安徽理工大学 | Method for recycling waste electronic pins to prepare nano-tin dioxide |
CN105645465A (en) * | 2016-01-27 | 2016-06-08 | 柳州豪祥特科技有限公司 | Process for preparing stannic oxide nano-powder through sintering method |
CN105668615A (en) * | 2016-01-27 | 2016-06-15 | 柳州豪祥特科技有限公司 | Technology for preparing SnO2 nano-powder with continuous hydrothermal method |
CN105540649B (en) * | 2016-01-27 | 2017-05-24 | 柳州豪祥特科技有限公司 | Preparation method of stannic oxide nanopowder |
CN105668614B (en) * | 2016-01-27 | 2017-08-25 | 柳州豪祥特科技有限公司 | The method for preparing stannic oxide nano powder |
CN108318542B (en) * | 2017-11-30 | 2020-10-27 | 苏州慧闻纳米科技有限公司 | Tin dioxide-based gas sensitive material, preparation method of hydrogen sulfide gas sensor chip and hydrogen sulfide gas sensor |
CN108663406A (en) * | 2018-03-29 | 2018-10-16 | 上海电机学院 | A kind of application of light excitation air-sensitive sensing testing system |
CN108609664B (en) * | 2018-05-29 | 2020-07-28 | 武汉工程大学 | N-butyl alcohol gas-sensitive material and preparation method thereof, and n-butyl alcohol gas-sensitive device and preparation method thereof |
CN108609667B (en) * | 2018-05-29 | 2020-07-28 | 武汉工程大学 | Ozone gas-sensitive material and preparation method thereof, ozone gas-sensitive device and preparation method thereof |
CN110117027B (en) * | 2019-05-28 | 2021-08-24 | 北华航天工业学院 | SnO (stannic oxide)2Nano-rod and preparation method thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5776425A (en) * | 1995-04-26 | 1998-07-07 | National Science Council | Method for preparing porous tin oxide monolith with high specific surface area and controlled degree of transparency |
JPH10273320A (en) * | 1997-03-27 | 1998-10-13 | Tokuyama Corp | Production of tin oxide powder |
CN1528671A (en) * | 2003-10-15 | 2004-09-15 | 中国科学院上海硅酸盐研究所 | Method for preparing nano tin anhydride powder |
-
2005
- 2005-06-21 CN CNB2005100211198A patent/CN1297484C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5776425A (en) * | 1995-04-26 | 1998-07-07 | National Science Council | Method for preparing porous tin oxide monolith with high specific surface area and controlled degree of transparency |
JPH10273320A (en) * | 1997-03-27 | 1998-10-13 | Tokuyama Corp | Production of tin oxide powder |
CN1528671A (en) * | 2003-10-15 | 2004-09-15 | 中国科学院上海硅酸盐研究所 | Method for preparing nano tin anhydride powder |
Also Published As
Publication number | Publication date |
---|---|
CN1724383A (en) | 2006-01-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1297484C (en) | Process for preparing one-dimensional nano tin dioxide material | |
Yin et al. | Fabrication, characterization and n-propanol sensing properties of perovskite-type ZnSnO3 nanospheres based gas sensor | |
Lei et al. | Thin films of tungsten oxide materials for advanced gas sensors | |
Peng et al. | Synthesis of oxygen-deficient indium− tin-oxide (ITO) nanofibers | |
Chang et al. | Flower-like BiOBr decorated stainless steel wire-mesh as immobilized photocatalysts for photocatalytic degradation applications | |
Geng et al. | Photon assisted room-temperature hydrogen sensors using PdO loaded WO3 nanohybrids | |
Sun et al. | Conductometric n-butanol gas sensor based on Tourmaline@ ZnO hierarchical micro-nanostructures | |
Saito et al. | Highly sensitive ethanol gas sensor using pyramid-shaped ZnO particles with (0001) basal plane | |
Lamba et al. | Sb2O3–ZnO nanospindles: A potential material for photocatalytic and sensing applications | |
Bharath et al. | Enhanced gas sensing properties of indium doped ZnO thin films | |
Huang et al. | Hydrothermal synthesis of different TiO 2 nanostructures: Structure, growth and gas sensor properties | |
Guo et al. | The enhanced ethanol sensing properties of CNT@ ZnSnO3 hollow boxes derived from Zn-MOF (ZIF-8) | |
Xie et al. | Facile synthesis and superior ethyl acetate sensing performance of Au decorated ZnO flower-like architectures | |
Dasari et al. | Nanostructured indium oxide thin films as a room temperature toluene sensor | |
Prabakaran et al. | Synergistic effect and enhanced electrical properties of TiO2/SnO2/ZnO nanostructures as electron extraction layer for solar cell application | |
Shah et al. | Decorating spherical In 2 O 3 nanoparticles onto ZnO nanosheets for outstanding gas-sensing performances | |
Zhang et al. | Effect of the sheet thickness of hierarchical SnO2 on the gas sensing performance | |
Nishi et al. | Gallium-doped zinc oxide nanoparticle thin films as transparent electrode materials with high conductivity | |
Mrabet et al. | Mechanism of wettability conversion on sprayed Zn2SnO4 thin films surfaces modified by thermal annealing in air | |
Sriram et al. | Nanostructured WO3 based gas sensors: a short review | |
Shahul Hameed et al. | Effect of silver doping on optical properties of nanoflower ZnO thin films prepared by spray pyrolysis technique | |
Choudhary et al. | Wrinkle type nanostructured Y-doped ZnO thin films for oxygen gas sensing at lower operating temperature | |
Ai et al. | Microstructure and properties of Ag-doped ZnO grown hydrothermally on a graphene-coated polyethylene terephthalate bilayer flexible substrate | |
CN102442787A (en) | Nano air-sensitive thin film and preparation method thereof | |
An et al. | Core-shell TiO2/ZnO nanorod array films on FTO: Two-step synthesis and improved ethanol sensing performance |
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 | ||
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070131 |