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Multivariate controllable synthesis method of BiOCl photocatalyst

A technology of photocatalyst and synthesis method, which is applied in the direction of light water/sewage treatment, energy wastewater treatment, etc., can solve the problems of short preparation cycle, achieve the effects of short preparation cycle, in-situ repair, and mild reaction conditions

Inactive Publication Date: 2014-09-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the present invention, polyhydric alcohol diethylene glycol is used as a solvent and a template at the same time, and the controllable preparation of particle crystal plane and morphology can be conveniently realized by controlling the reaction parameters. The method is easy to operate, the preparation cycle is short, and the surface The use of active agents can effectively degrade typical drugs in water and solve the problem of environmental pollution

Method used

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  • Multivariate controllable synthesis method of BiOCl photocatalyst
  • Multivariate controllable synthesis method of BiOCl photocatalyst
  • Multivariate controllable synthesis method of BiOCl photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0023] BiCl 3 Add it into diethylene glycol, stir at room temperature for 1.5h, and form a concentration of 0.06mol L -1 Bismuth precursor, add urea and water, where urea and BiCl 3 The molar ratio is 10:1, the ratio of diethylene glycol and water is 1:1, continue to stir for 1.5h to obtain a milky white cloudy liquid; transfer the formed cloudy liquid into a Teflon high-pressure reactor, and perform a solvothermal reaction at a temperature of 120°C 0.5h; wash the obtained precipitate with distilled water and ethanol, and dry to obtain BiOCl photocatalyst powder.

[0024] The obtained photocatalyst is used for oxidation treatment of carbamazepine aqueous solution. The reaction conditions are: the amount of drug treatment in water is 2.5 mg L -1 , under the irradiation of ultraviolet lamp or simulated solar xenon lamp, the catalyst dosage is 0.5g L -1 , air was blown in from the bottom of the reactor. Samples were taken at intervals of 5 to 30 minutes, and the absorbance o...

Embodiment approach 2

[0026] BiCl 3 Add it into the diethylene glycol solvent, stir at room temperature for 1.5h, and form a concentration of 0.06mol L -1 Bismuth precursor; add urea, wherein urea and BiCl 3 The molar ratio is 10:1, continue to stir to obtain a transparent sol; transfer the formed sol into a Teflon high-pressure reactor, and conduct a solvothermal reaction at a temperature of 120°C for 0.5h; wash the obtained precipitate with distilled water and ethanol, and dry to obtain BiOCl photocatalyst powder.

[0027] The obtained photocatalyst is used for oxidation treatment of carbamazepine aqueous solution. The reaction conditions are: the amount of drug treatment in water is 2.5 mg L -1 , under the irradiation of ultraviolet lamp or simulated solar xenon lamp, the catalyst dosage is 0.5g L -1 , air was blown in from the bottom of the reactor. Samples were taken at intervals of 5 to 30 minutes, and the absorbance of the carbamazepine solution was measured by UV-visible spectrophotome...

Embodiment approach 3

[0029] BiCl 3 Join in diethylene glycol solvent, ultrasonic (40kHz, 90W / cm 2 ) to help dissolve, forming a concentration of 0.06mol L -1 Bismuth precursor; add urea, wherein urea and BiCl 3 The molar ratio was 10:1, and a transparent sol was obtained by ultrasonication; continue ultrasonication for 5 minutes, intermittently for 2 minutes, and perform 6 cycles; transfer the formed sol into a Teflon autoclave, and perform a solvothermal reaction at a temperature of 120°C for 0.5h; The precipitate was washed with distilled water and ethanol, and dried to obtain BiOCl photocatalyst powder.

[0030] The obtained photocatalyst is used for oxidation treatment of carbamazepine aqueous solution. The reaction conditions are: the amount of drug treatment in water is 2.5 mg L -1 , under the irradiation of ultraviolet lamp or simulated solar xenon lamp, the catalyst dosage is 0.5g L -1 , air was blown in from the bottom of the reactor. Samples were taken at intervals of 5 to 30 minut...

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Abstract

The invention discloses a multivariate controllable synthesis method of a BiOCl photocatalyst, and belongs to the technical field of photocatalytic water treatment of environmental chemical engineering. The multivariate controllable synthesis method is characterized by comprising the following steps: adding BiCl3 with proper concentration to diethylene glycol or a mixed solvent of diethylene glycol and water; adding a urea precipitation agent, directly transferring sol or transferring sol subjected to ultrasonic pretreatment into a Teflon high-pressure reaction kettle to carry out solvothermal reaction at certain temperature to generate sediments after evenly mixing; and baking the sediments at 80 DEG C after washing with water and ethanol, so as to obtain BiOCl photocatalyst powder with different morphologies. The synthesis method disclosed by the invention has the characteristics that the preparation cycle of BiOCl is short, use of a surfactant is avoided, grains with controllable crystal faces (110 and 102) and controllable morphologies (two-dimensional flakes, three-dimensional flowers or spheres) can be conveniently achieved by controlling and ultrasonic pretreatment on the solvent. The catalyst is applied to photocatalytic degradation of carbamazepine medicine wastewater, displays the photocatalytic activity superior to that of TiO2(P25) under ultraviolet light and simulated sunlight, and has a practical application prospect.

Description

technical field [0001] The invention discloses a multi-element controllable synthesis method of BiOCl photocatalyst, which belongs to the technical field of photocatalytic water treatment in environmental chemical industry, and specifically relates to a method of using the solvent and template agent of polyalcohol to prepare crystal plane and morphology by controlling reaction parameters BiOCl photocatalyst with multiple controllability and high efficiency degradation ability for typical drugs in water. Background technique [0002] For a long time in the past, research in the field of water treatment in the world has focused on certain priority pollutants, such as persistent organic pollutants, pesticides, industrial chemicals and heavy metals. However, with the continuous advancement of scientific and technological means, the production and consumption of pharmaceuticals and personal care products (PPCPs) are increasing day by day. Since PPCPs are difficult to be complete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C02F1/32C02F1/30
CPCY02W10/37
Inventor 王雅文高晓亚金州洋温亚龙张小超樊彩梅岳斌
Owner TAIYUAN UNIV OF TECH
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