Preparation method for chlorine doped titanium dioxide photocatalyst

A technology of titanium dioxide and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limitation, easy photocorrosion of cadmium selenide, low solar utilization rate, etc., and achieve uniform size Effect

Inactive Publication Date: 2017-12-29
张家港市金港镇宏业海绵复合厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cadmium selenide is easily corroded by light, has poor photostability, the light absorption threshold of titanium dioxide is limited to ultraviolet light, and the solar utilization rate is low. These shortcomings greatly limit their performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation method of chlorine-doped titanium dioxide photocatalyst

[0017] (1) Mix titanium dioxide powder, sodium chloride and absolute ethanol for ball milling to obtain wet powder, the diameter of the ball is 4-6 mm, the ball-to-material ratio is (7-10): 1, and the milling speed is 500-600 rpm , the ball milling time is 5-7 hours;

[0018] The mass ratio of titanium dioxide powder and sodium chloride is 2.8:1.

[0019] (2) The wet powder is dried at 60°C for 2 hours, and then calcined at 800°C for 5 hours.

[0020] XRD and XPS characterizations showed that the synthesized nanomaterials were chlorine-doped titanium dioxide. The spherical particle size of the obtained titanium dioxide crystal is uniform.

[0021] The degradation rate of chlorine-doped titanium dioxide to ciprofloxacin wastewater reaches more than 87%.

[0022] (3), dissolving the ciprofloxacin template molecule, acrylamide functional monomer, azobisisobutylcyanide and trimethylol triacrylate in a...

Embodiment 2

[0031] Preparation method of chlorine-doped titanium dioxide photocatalyst

[0032] (1) Mix titanium dioxide powder, sodium chloride and absolute ethanol for ball milling to obtain wet powder, the diameter of the ball is 4-6 mm, the ball-to-material ratio is (7-10): 1, and the milling speed is 500-600 rpm , the ball milling time is 5-7 hours;

[0033] The mass ratio of titanium dioxide powder and sodium chloride is 2.8:1.

[0034] (2) The wet powder is dried at 50°C for 4 hours, and then calcined at 600°C for 7 hours.

[0035] (3), dissolving the ciprofloxacin template molecule, acrylamide functional monomer, azobisisobutylcyanide and trimethylol triacrylate in a mixed solution of methanol and water, and stirring evenly to obtain a precursor solution;

[0036] The volume ratio of methanol to water is 7:3;

[0037] The mass ratio of ciprofloxacin template molecule, acrylamide, azobisisobutylcyanide and trimethylol triacrylate is 1:2:5:3.

[0038] (4), adding the precursor s...

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PUM

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Abstract

The invention discloses a preparation method for a chlorine doped titanium dioxide photocatalyst. The method comprises the following steps: (1) mixing titanium dioxide powder, sodium chloride and absolute ethyl alcohol and ball-milling, thereby acquiring wet powder, wherein the mass ratio of titanium dioxide powder to sodium chloride is (2.6-3):1, and (2) drying the wet powder and calcining for 5-7 hours under the condition of 600-800 DEG C. The spherical titanium dioxide crystal particle acquired according to the invention is in uniform size. The degradation rate of the chlorine doped titanium dioxide to ciprofloxacin wastewater is above 87%.

Description

technical field [0001] The application belongs to the technical field of wastewater treatment, in particular to a method for preparing a chlorine-doped titanium dioxide photocatalyst. Background technique [0002] Cadmium selenide is a direct bandgap semiconductor material with a bandgap width of 1.7eV. It has two crystal structures of cubic sphalerite and hexagonal wurtzite. The cubic phase structure is metastable and can only exist at low temperature and high temperature. transforms into a hexagonal phase structure. Cadmium selenide can exist both cubic and hexagonal crystal phases at room temperature. Cadmium selenide nanocrystals are the most widely studied and most promising type of II-VI semiconductor nanocrystals among semiconductor nanocrystals. attention. As a very important semiconductor material, it has shown broad application prospects in various light-emitting devices, laser and infrared detection devices, infrared windows and nonlinear optical materials, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135C02F1/30
CPCB01J27/135B01J35/004C02F1/30C02F2305/10
Inventor 沙冰娟
Owner 张家港市金港镇宏业海绵复合厂
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