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Nano titanium dioxide/copper sulphide nano composite material

A nano-composite material and nano-titanium dioxide technology, applied in nanotechnology, nanotechnology, chemical/physical process and other directions, can solve the problems of low photocatalytic efficiency and low utilization rate of solar energy, and achieve simple preparation equipment, enhanced light absorption range, The effect of improving the photocatalytic efficiency

Inactive Publication Date: 2017-08-18
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure titanium dioxide nanomaterials have many defects, such as: on the one hand, its wide band gap (3.2eV), so that it can only absorb in the ultraviolet region, and the utilization rate of solar energy is low; on the other hand, titanium dioxide is in Electron-hole pairs generated under light conditions are easier to recombine, resulting in low photocatalytic efficiency

Method used

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  • Nano titanium dioxide/copper sulphide nano composite material
  • Nano titanium dioxide/copper sulphide nano composite material
  • Nano titanium dioxide/copper sulphide nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1, (1) Hydrothermal treatment was performed on a titanium sheet to obtain titanium dioxide nanowires on the surface of the titanium sheet; (2) The titanium sheet treated in step 1 was immersed in a mixed aqueous solution of copper chloride and sodium thiosulfate, and passed Hydrothermally heated at 110℃ for 10 hours, then the CuS nanosheet composite TiO is obtained 2 Nanocomposite materials. Wherein, in the mixed solution of copper chloride and sodium thiosulfate, the concentration of copper chloride and sodium thiosulfate is 0.05 mol / L. Such as figure 1 The SEM picture shows that the copper sulfide nanosheets are uniformly grown on the surface of the titanium dioxide nanowires. figure 2 The XRD pattern shows that the nanocomposite contains copper sulfide, and the energy spectrum shows that the composite contains various elements ( Image 6 ),Such as Figure 5 For CuS@TiO 2 TEM characterization of NW nanocomposites shows that the successful combination of copper ...

Embodiment 2

[0015] Example 2: (1) Hydrothermal treatment was performed on the titanium sheet to obtain titanium dioxide nanowires on the surface of the titanium sheet; (2) The titanium sheet treated in step 1 was immersed in a mixed aqueous solution of copper chloride and sodium thiosulfate, By changing the hydrothermal temperature under 10h hydrothermal conditions, different morphologies can be obtained. Such as image 3 Shown as CuS@TiO 2 The SEM image of the NW nanocomposite material shows that after 10 hours of hydrothermal time, the nanocomposite material obtained at a hydrothermal temperature of 110°C has a good morphology, and copper sulfide is well distributed on the surface of the nanowire.

Embodiment 3

[0016] Example 3, (1) Hydrothermal treatment was performed on the titanium sheet to obtain titanium dioxide nanowires on the surface of the titanium sheet; (2) The titanium sheet treated in step 1 was immersed in a mixed aqueous solution of copper chloride and sodium thiosulfate, and Under the hydrothermal temperature of 110℃, the CuS@TiO with different morphologies can be obtained by changing the hydrothermal reaction time 2 NW nanocomposite materials. Such as Figure 4 The SEM image shows that the nanocomposite material obtained under the hydrothermal temperature of 110℃ and the hydrothermal time of 10h has a good morphology, and the two are well dispersed, avoiding the aggregation of copper sulfide on the surface of the titanium dioxide nanowire .

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Abstract

The invention discloses a nano titanium dioxide / copper sulphide nano composite material. Titanium dioxide nanowires are prepared by a hydrothermal method and are used as a reaction substrate, a compound structure of copper sulphide nanosheets and titanium dioxide nanowires is prepared successfully by a secondary hydrothermal method under the conditions that the temperature is 100 DEG C and the reaction time is 10 hours, meanwhile, influence of hydrothermal temperature and hydrothermal time to photocatalytic performance of the composite structure is researched. Copper sulphide is prepared into a sheet structure, the compound quantity of the copper sulphide and the titanium dioxide nanowires is increased, the copper sulphide nanosheets and the titanium dioxide nanowires form a heterostructure, the light absorption range of titanium dioxide is expanded, and finally, the photocatalytic efficiency of the composite structure is improved. In the method, equipment is simple, process parameters are controllable, and the repeatability is high. The prepared nano composite material has important application in the field of photocatalysts.

Description

Technical field [0001] The invention relates to a nano composite material, in particular to a CuS@TiO 2 A preparation method of NW nanocomposite material, and the application of the nanocomposite material in the field of photocatalysis. Background technique [0002] In recent years, visible light catalysts have become a research hotspot in the field of catalysts due to their high photocatalytic efficiency and quantum yield. Titanium Dioxide (TiO 2 ) In addition to the characteristics of general nano materials, nano materials also have good photocatalytic activity and can effectively degrade organic pollutants; in addition, nano titanium dioxide can also convert solar energy into electrical energy. Therefore, titanium dioxide nanomaterials have broad application prospects in environmental pollution control, solar cells and other fields. However, pure titanium dioxide nanomaterials have many disadvantages. For example, on the one hand, its band gap is relatively wide (3.2eV), whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J21/06B82Y30/00
CPCB82Y30/00B01J21/063B01J27/04B01J35/39
Inventor 李小云祝文豪
Owner ZHEJIANG SCI-TECH UNIV
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