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Preparation of CuS2 nanosheet and TiO2 nanowire composite photocatalyst

A nanowire and nanosheet technology is applied in the field of preparation of CuS2 nanosheets and TiO2 nanowire composite photocatalysts, which can solve the problems of semiconductor photocatalyst photocatalytic efficiency, stability and repeatability, etc., and achieve good photocatalytic activity. , the effect of improving catalytic activity

Inactive Publication Date: 2019-07-09
XINGHUA PRECISION CASTING & FORGING IND RES INST CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, TiO 2 The photocatalytic efficiency, stability and reusability of semiconductor photocatalysts in practical applications are still difficult to meet the needs of practical applications

Method used

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  • Preparation of CuS2 nanosheet and TiO2 nanowire composite photocatalyst
  • Preparation of CuS2 nanosheet and TiO2 nanowire composite photocatalyst
  • Preparation of CuS2 nanosheet and TiO2 nanowire composite photocatalyst

Examples

Experimental program
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Effect test

Embodiment example 1

[0046] CuS 2 Nanosheets and TiO 2 Preparation of Nanowire Composite Photocatalysts.

[0047] TiO 2Preparation of nanowires: Finally, put the washed titanium sheet into the pre-configured 20mL NaOH (cut the titanium sheet (1.0cm×1.0cm), put it into a beaker with acetone solution and ultrasonic for 1h, then put the titanium sheet Ultrasonic washing in deionized water three times, 15min each time. 80g / L) solution in the polytetrafluoroethylene lining, and put into a high-pressure reactor, hydrothermal reaction at 240 ℃ for 8-10h. After naturally cooling to room temperature, the titanium sheet was washed with deionized water, and then dried at 70° C. to finally obtain a titanium sheet modified with titanium dioxide nanowires on the surface.

[0048] CuS 2 Nanosheets and TiO 2 Preparation of nanowires: Pre-configure 20mL NaS respectively 2 SO 4 ·3H 2 O (9.8g / L) solution and 20mL CuCl 2 2H 2 O (8.5g / L) solution, then fully stir the two reaction precursors in the lining of ...

Embodiment example 2

[0051] CuS 2 Nanosheets and TiO 2 Nanowire composite photocatalyst degrades methylene blue under visible light irradiation.

[0052] CuS prepared by the method of implementation case 1 2 Nanosheets and TiO 2 Nanowire composite photocatalysts were used to degrade methylene blue. The concentration of the methylene blue solution is 6mg / L; take 30mg of the composite material powder, place it in 100mL of the above methylene blue solution, stir in the dark room for 60 minutes, and then place the solution in a visible light source where the ultraviolet light is filtered out, and take it every 10 minutes. 5mL methylene blue solution, measure the characteristic peak of methylene blue in the solution with a UV-visible spectrophotometer. At the same time, the same amount of P25 was used to catalyze the degradation of methylene blue for comparison.

[0053] Obtain CuS according to implementation case 2 2 Nanosheets and TiO 2 The degradation curve of nanowire composite photocatalyst...

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Abstract

The invention discloses a preparation method of a CuS2 nanosheet and TiO2 nanowire composite photocatalyst, and applications of the CuS2 nanosheet and TiO2 nanowire composite photocatalyst in environment pollutant treatment, and belongs to the field of material preparation and photocatalysis research. According to the preparation method, two step hydrothermal method is adopted to prepare the CuS2nanosheet and TiO2 nanowire composite photocatalyst. The preparation method comprises following steps: hydrothermal method is adopted to prepare titanium dioxide nanowire, wherein the linear structureis capable of providing preferable attachment points for subsequent preparation process; then a sulfur source and a copper source are adopted, mixing stirring is carried out, the titanium dioxide nanowire is immersed in a mixed solution of the sulfur source and the copper source of a same concentration; and reaction is carried out under hydrothermal method conditions so as to obtain the CuS2 nanosheet and TiO2 nanowire composite material. According to the preparation method, after modification, the obtained composite material is provided with excellent electron hole separation and optical adsorption performance. Compared with conventional TiO2 composite material, the advantages are that: the catalytic activity is better, the catalytic circulation stability is excellent, and the obtained composite material is suitable for large range popularization and applications.

Description

technical field [0001] The invention belongs to the technical field of material synthesis and photocatalysis, and mainly relates to a CuS 2 Nanosheets and TiO 2 Preparation of nanowire composite photocatalyst and its application in photocatalytic water treatment. Background technique [0002] With the development of industrialization, environmental and energy issues have become two major themes of world development. How to solve the problem of environmental pollution and find clean energy has become a hot spot and focus in the field of materials research. [0003] TiO 2 Semiconductor photocatalysts have become one of the thermoelectric materials for photocatalysis research due to their wide source of materials, low price, and no biological toxicity, and have been researched and applied in many fields, including catalysis, biology, medicine, coatings, etc. [0004] However, TiO 2 There are also some defects in semiconductor photocatalysts, for example, the specific surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/02B01J37/10C02F1/30C02F101/30
CPCB01J37/10B01J27/04C02F1/30C02F2305/10C02F2101/308B01J35/00B01J35/30B01J35/39
Inventor 张松利马开梅梁智萍
Owner XINGHUA PRECISION CASTING & FORGING IND RES INST CO LTD
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