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Preparation method for 3D morphological silver/silver bromide/titanium dioxide photocatalyst and product and application thereof

A photocatalyst and morphology technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems that the large specific surface area 3D morphology Ag/AgBr/TiO2 preparation method has not been reported. , to achieve the effect of broadening the visible light response range, increasing the specific surface area, and increasing the specific surface area

Inactive Publication Date: 2018-12-21
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the large specific surface area 3D morphology Ag / AgBr / TiO for visible light catalytic degradation 2 The preparation method has not been reported

Method used

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  • Preparation method for 3D morphological silver/silver bromide/titanium dioxide photocatalyst and product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, mix isopropyl titanate or tetrabutyl titanate and concentrated hydrochloric acid and stir evenly, the molar ratio of titanate and hydrochloric acid is 1:50; add cetyltrimethylammonium bromide in deionized water (CTAB), mix and stir well. The CTAB aqueous solution was added dropwise to the titanate solution and stirred for 1 h. The molar ratio of titanate and CTAB is 1:0.5, and the molar ratio of titanate and water is 1:2000. A certain amount of ethylene glycol and urea were respectively added to the above mixed solution of titanate and CTAB, and stirred evenly. The molar ratio of titanate and ethylene glycol is 1:1000, and the molar ratio of titanate and urea is 1:20. The above mixed solution was added into a 100mL hydrothermal kettle, and subjected to a hydrothermal reaction at 150°C for 24 hours to generate titanium dioxide with a 3D morphology. Add silver nitrate and 2mL ammonia water to the suspension containing 3D titanium dioxide obtained by hydrothermal...

Embodiment 2

[0037]First, titanate (isopropyl titanate or tetrabutyl titanate) and concentrated hydrochloric acid are mixed and stirred evenly. The molar ratio of titanate and hydrochloric acid is 1:100. Add cetyltrimethylammonium bromide (CTAB) to deionized water, mix and stir well. The CTAB aqueous solution was added dropwise to the titanate solution and stirred for 1 h. The molar ratio of titanate and CTAB is 1:1, and the molar ratio of titanate and water is 1:1000. A certain amount of ethylene glycol and urea were respectively added to the above mixed solution of titanate and CTAB, and stirred evenly. The molar ratio of titanate and ethylene glycol is 1:2000, and the molar ratio of titanate and urea is 1:20. The above mixed solution was added into a 100mL hydrothermal kettle, and subjected to a hydrothermal reaction at 150°C for 24 hours to generate titanium dioxide with a 3D morphology. Add silver nitrate and 2mL ammonia water to the suspension containing 3D titanium dioxide obtain...

Embodiment 3

[0040] First, titanate (isopropyl titanate or tetrabutyl titanate) and concentrated hydrochloric acid are mixed and stirred evenly. The molar ratio of titanate and hydrochloric acid is 1:200. Add cetyltrimethylammonium bromide (CTAB) to deionized water, mix and stir well. The CTAB aqueous solution was added dropwise to the titanate solution and stirred for 1 h. The molar ratio of titanate and CTAB is 1:1, and the molar ratio of titanate and water is 1:2000. A certain amount of ethylene glycol and urea were respectively added to the above mixed solution of titanate and CTAB, and stirred evenly. The molar ratio of titanate and ethylene glycol is 1:2000, and the molar ratio of titanate and urea is 1:40. The above mixed solution was added into a 100mL hydrothermal kettle, and subjected to a hydrothermal reaction at 150°C for 12h to generate titanium dioxide with a 3D morphology. Add silver nitrate and 2mL ammonia water to the suspension containing 3D titanium dioxide obtained b...

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Abstract

The invention relates to a preparation method for a 3D morphological silver / silver bromide / titanium dioxide photocatalyst and a product and application thereof. The 3D morphological Ag / AgBr / TiO<2> photocatalyst is prepared with titanate, concentrated hydrochloric acid, CTAB (cetyltrimethyl ammonium bromide), water, glycol, urea, silver nitrate and ammonia water as materials by the method of carrying silver under a high-temperature and high-pressure environment. Titanate and concentrated hydrochloric acid are first mixed, the aqueous solution of CTAB is then dripped into the titanate solution,a certain amount of glycol and a certain amount of urea are respectively added into the mixed solution of titanate and CTAB and uniformly mixed, hydrothermal reaction is then carried out under 150 DEGC, silver nitrate and ammonia water are added into suspension obtained by the hydrothermal reaction and agitated for 24 hours, centrifugal washing and drying are then carried out, roasting is carriedout under 400 DEG C for 2 hours, and after roasting, the sample is reduced under ultraviolet light for 3 hours. The process of the method is simple, the requirement on equipment is low, and the prepared composite photocatalyst has strong response to tetracycline hydrochloride under the condition of visible light.

Description

technical field [0001] The present invention relates to a preparation method of silver-loaded titanium dioxide photocatalyst under high temperature and high pressure environment, and its product and application, especially to the preparation of a 3D morphology silver / silver bromide / titanium dioxide photocatalyst and its product and application . Background technique [0002] As a wide-bandgap semiconductor, titanium dioxide is widely used in the fields of atmospheric and water environment pollutant degradation, antibacterial, deodorization and self-cleaning due to its stable chemical properties and efficient photocatalytic activity. However, the photoresponse range of titanium dioxide is in the ultraviolet region, and the utilization rate of sunlight is low; and the electrons generated by excitation are easy to recombine with holes, and the photon quantum efficiency is low, which seriously restricts its practical application in photocatalysis and other aspects. In recent ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135B01J37/10B01J37/03B01J37/34B01J37/08C02F1/30C02F101/38C02F101/36C02F101/34
CPCC02F1/30B01J27/135B01J37/031B01J37/082B01J37/10B01J37/343C02F2305/10C02F2101/38C02F2101/36C02F2101/34B01J35/39
Inventor 何丹农林琳邬淑红王敬锋徐少洪金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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