Method for preparing silver/cadmium sulfide/titanium dioxide composite photocatalytic material

A technology of composite photocatalysis and titanium dioxide, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limiting TiO2 photocatalytic activity and application prospects, and achieve stable physical and chemical properties, photo The effect of high catalytic activity and high refractive index

Inactive Publication Date: 2016-03-02
江西农人园林开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the photosensitive reaction of TiO2 is limited to the ultraviolet region, which only occupies 5% of the solar spectrum. In addition, due to the high recombination rate of photogenerated electrons and hole pairs, the photocatalytic activity and application prospects of TiO2 are limited.

Method used

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  • Method for preparing silver/cadmium sulfide/titanium dioxide composite photocatalytic material
  • Method for preparing silver/cadmium sulfide/titanium dioxide composite photocatalytic material
  • Method for preparing silver/cadmium sulfide/titanium dioxide composite photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) CdO / TiO 2 Preparation of:

[0023] Weigh 1.0 g of triblock copolymer Pluronic P123, dissolve it in 15 ml of absolute ethanol, stir at room temperature for 0.5 h, then sonicate for 10 min to form a P123 / EtOH mixed solution, and at the same time, dissolve 3.2 ml of concentrated Hydrochloric acid was added dropwise in 4.0g of tetra-n-butyl titanate, and 0.0225g of Cd(NO 3 ) 2 4H 2 O, making the prepared CdO / TiO 2 The mass ratio of P123 / EtOH was 1%, and the P123 / EtOH mixed solution was stirred for 0.5 h and mixed with the above solution, and stirred at room temperature for at least 3 h. Pour the synthesized sol solution into an open petri dish, keep the surrounding humidity at 50%-60%, and let it stand at room temperature for 2-4 weeks. After it becomes a wet powder, calcinate it at 200°C for 4 hours and then grind it. , reflux the powder in an aqueous solution of ethylenediamine with a pH of 11-12 for 48 hours, keep the temperature at 125°C, adjust the pH at 11-12...

Embodiment 2

[0029] CdO / TiO 2 The preparation is the same as step (1) in Example 1, adding 0.0451g of Cd(NO 3 ) 2 4H 2 O, making the prepared CdO / TiO 2 The mass ratio is 2%; weigh 0.6g of prepared CdO / TiO 2 , CdS / TiO 2 The preparation method of the intermediate composite powder is the same as that of step (2) in Example 1, with 0.0224g of Na 2 S·9H2 O is made into 100ml of 0.2mol / L Na 2 S solution to prepare CdS / TiO 2 Intermediate composite powder, take 50mgCdS / TiO 2 It is used to degrade 50ml10PPm methyl orange solution under simulated sunlight, and the degradation rate reaches 98.6% after 75min.

[0030] All the other are with embodiment 1.

Embodiment 3

[0032] CdO / TiO 2 The preparation is the same as step (1) in Example 1, adding 0.0902g of Cd(NO 3 ) 2 4H 2 O, making the prepared CdO / TiO 2 The mass ratio is 4%; weigh 0.6g of prepared CdO / TiO 2 , CdS / TiO 2 The preparation method of the intermediate composite powder is the same as that of step (2) in Example 1, with 0.0449g of Na 2 S·9H 2 O is made into 100ml of 0.2mol / L Na 2 S solution to prepare CdS / TiO 2 Intermediate composite powder, take 50mgCdS / TiO 2 It is used to degrade 50ml10PPm methyl orange solution under simulated sunlight, and the degradation rate reaches 73.7% after 75min.

[0033] All the other are with embodiment 1.

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Abstract

The invention discloses a method for preparing a silver/cadmium sulfide/titanium dioxide composite photocatalytic material. According to the method, TBOT and Cd(NO3)2.4H2O are taken as raw materials to prepare CdO/TiO2 with the evaporation-induced self-assembly (EISA) method firstly, then CdO/TiO2 and Na2S.9H2O are taken as the raw materials to prepare CdS/TiO2, and finally CdS/TiO2 and AgNO3 are taken as raw materials to prepare the silver/cadmium sulfide/titanium dioxide ternary composite photocatalytic material with the photodeposition method. The composite material is an inorganic photocatalytic material, is stable in performance, quite high in photocatalytic activity and resistant to chemical corrosion and photocorrosion, and has important significance in photolysis of water, sterilization, preparation of solar sensitization batteries, environment protection and other fields.

Description

technical field [0001] The invention relates to a method for preparing a silver / cadmium sulfide / titanium dioxide composite photocatalytic material, belonging to the field of photocatalytic composite material preparation. Background technique [0002] TiO 2 It is a catalyst for heterogeneous catalytic reactions, with deep valence band energy levels, non-toxic, corrosion resistance, high stability, mild reaction conditions, non-selective degradation of organic matter in water pollutants, complete mineralization, and no secondary pollution , cheap and other advantages, it is recognized as the most practical photocatalyst. It is widely used in sewage treatment, improvement of drinking water quality, control of air pollutants, indoor air purification, hydrogen production by catalytic hydrolysis, sterilization and preparation of solar sensitized batteries. Especially in terms of environmental protection, TiO 2 As a photocatalyst, it shows a broad application prospect. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/047
Inventor 谢宇周盼盼胡冬生宋健华凌云
Owner 江西农人园林开发有限公司
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