Method for preparing ZnO and CdO heterogeneous nanostructured oxide material

A nanostructure and oxide technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the problems of inability to form composites, and the catalytic activity is not improved. To achieve the effect of improving photocatalytic activity and simple method

Inactive Publication Date: 2009-08-12
JILIN UNIV
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalytic activity of CdS-CdO is lower than that of CdS, indicating that the binary composite system CdS and CdO prepared by ordinary co-precipitation cannot form an effective composite, and the catalytic activity has

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing ZnO and CdO heterogeneous nanostructured oxide material
  • Method for preparing ZnO and CdO heterogeneous nanostructured oxide material
  • Method for preparing ZnO and CdO heterogeneous nanostructured oxide material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1: Preparation and characterization of ZnO / CdO with heterogeneous nanostructures

[0026] Weigh 2.616g of Zn powder and add 400cm of dilute sulfuric acid solution 3 ,Heat in a water bath to maintain the reaction temperature at 60~65℃ until no more hydrogen is produced, and Zn and ZnSO are obtained. 4 Solution. Discard the clear liquid, add Cd(NO 3 ) 2 Solution 200cm3 , Na slowly dripping under stirring 2 CO 3 Solution 250cm 3 , The dripping speed is 2 to 3 drops / sec. At the end of the reaction, the precipitate was filtered with suction, washed with water and ethanol, and dried at 60°C for 8-12 hours to obtain a homogeneous mixture of Zn-CdCO3. Then, it is placed in a muffle furnace to program a temperature (5-10°C / min) to 600°C, and then kept for 1.5 hours to prepare an oxide with a particle size of 60-80 nm and a ZnO / CdO heterogeneous nanostructure.

[0027] XRD analysis of the obtained product shows that the product is composed of ZnO and CdO phases, see Figure 5 ...

Example Embodiment

[0028] Example 2: Preparation and characterization of ZnO / CdO with heterogeneous nanostructures

[0029] The amount of raw materials and the preparation process are the same as in Example 1, except that the heat treatment process is: Zn-CdCO 3 The homogeneous mixture is placed in a muffle furnace to program a temperature (5-10°C / min) to 700°C, and then kept for 3h to prepare an oxide with a particle size of 300-400nm and a ZnO / CdO heterogeneous nanostructure.

[0030] image 3 TEM picture of ZnO / CdO prepared by heat treatment at 700℃ for 3h, Figure 4 For corresponding image 3 The EDS spectrum. EDS was used to analyze the composition of the micro-regions where the particles were connected (atomic percentages were O: 22.40%, Cd: 51.60%, Zn: 26.00%, respectively), indicating that the product was a ZnO / CdO heterostructure.

Example Embodiment

[0031] Example 3: Preparation of ZnO / CdO with heterogeneous nanostructures

[0032] The preparation process is the same as in Example 1 or Example 2, except that the Na in Example 1 or 2 2 CO 3 The solution is changed to add dilute ammonia solution, the result is Zn-Cd(OH) 2 Homogeneous mixture; after heat treatment, the same product as in Example 1 or 2 can be prepared. XRD analysis shows that the product is also composed of ZnO and CdO phases.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for preparing a ZnO and CdO heterogeneous nano structural oxide material, and belongs to the technical field of inorganic material preparation. Dilute sulphuric acid and metal zinc powder are reacted to form loose and porous spongy metal zinc, then CdCO3 or Cd(OH)2 is evenly precipitated on the surface of the loose and porous spongy metal zinc, finally the metal zinc is oxidized to form ZnO, and the CdCO3 or the Cd(OH)2 is decomposed into CdO so as to form a ZnO/CdO heterogeneous nano structural oxide. The method is simple and convenient, and does not need a template agent; the size of oxide particles can be controlled by thermal treatment temperature or time; and the photocatalysis activity of a product is remarkably improved compared with the ZnO-CdO prepared by the prior coprecipitation method.

Description

technical field [0001] The invention belongs to the technical field of inorganic material preparation technology, and relates to a preparation method of an oxide material with a ZnO / CdO heterogeneous nanostructure that can be used in the field of photocatalysis. Background technique [0002] Nanophotocatalytic materials have broad application prospects in the fields of solving environmental pollution, photo-splitting water to produce hydrogen and so on. However, currently used photocatalysts such as TiO 2 , ZnO, etc. have the disadvantages of low catalytic efficiency and low utilization rate of sunlight. By synthesizing composite oxide photocatalytic materials, there will be great improvements in prolonging the lifetime of photogenerated electrons and holes and improving the absorption and utilization of visible light by catalysts. As reported by Y. Bessekhouad et al. 2 S 3 / TiO 2 and CdS / TiO 2 Research on the preparation of composite oxide photocatalysts and the degra...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J23/06B01J37/02B01J37/12H01L31/0336
Inventor 庞广生孙尚梅冯守华
Owner JILIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap