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Preparation method of nano titanium dioxide with photocatalytic performance

A nano-titanium dioxide, photocatalytic technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low degradation rate, long photodegradation period, poor photocatalytic performance of titanium dioxide, etc. The effect of high degradation rate and short degradation time

Inactive Publication Date: 2017-08-18
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0003] The present invention mainly aims at the problems of poor photocatalytic performance, long photodegradation cycle and low degradation rate of titanium dioxide prepared by the current preparation method, and provides a preparation method of nano titanium dioxide with photocatalytic performance

Method used

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  • Preparation method of nano titanium dioxide with photocatalytic performance
  • Preparation method of nano titanium dioxide with photocatalytic performance
  • Preparation method of nano titanium dioxide with photocatalytic performance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Nanoscale titanium dioxide was prepared using ramie fiber carboxymethyl cellulose as a template.

[0015] (1), activation treatment of ramie fiber carboxymethyl cellulose:

[0016] Add 0.5g of ramie fiber carboxymethyl cellulose to 10mL of 10% sodium hydroxide solution by mass percentage, then add 0.5mL of dimethyl sulfoxide, stir at room temperature for 10h or ultrasonically react at room temperature for 0.5h, after the reaction Add 3.3g of sodium chloroacetate and 0.5g of catalyst 4-dimethylaminopyridine to the final solution, then ultrasonically react for 2 hours at 40°C in 20% sodium hydroxide solution, and then use sulfuric acid to lower the pH of the solution after the reaction is stopped. The value was adjusted to 2, and finally the activated ramie fiber carboxymethyl cellulose was obtained by suction filtration washing with absolute ethanol and distilled water and drying in air at 60°C for 5 hours.

[0017] (2), water treatment:

[0018] Weigh 0.5 g of activat...

Embodiment 2

[0024] Nano-titanium dioxide was prepared using ramie fiber as a template.

[0025] (1), activation treatment of ramie fiber:

[0026] Add 0.5g ramie fiber to 10mL of 30% sodium hydroxide solution by mass percentage, then add 1mL dimethyl sulfoxide, stir at room temperature for 20h or ultrasonically react at room temperature for 2h, add 3.3g Sodium chloroacetate and 0.5g catalyst 4-dimethylaminopyridine, then ultrasonically reacted in 20% sodium hydroxide solution at 80°C for 2h, after stopping the reaction, adjust the pH value of the solution to 3 with sulfuric acid, and finally use Activated ramie fibers were prepared by suction filtration, washing with absolute ethanol and distilled water, and drying in air at 60°C for 5 hours.

[0027] (2), water treatment:

[0028] Weigh 0.5 g of activated ramie fibers in step (1) and carry out water treatment at room temperature, so that the ramie fibers contain 15% water by mass.

[0029] (3), get the 0.5g ramie fiber that the water ...

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Abstract

The invention belongs to the technical field of preparation methods of nano titanium dioxide and particularly relates to a preparation method of the nano titanium dioxide with photocatalytic performance. The invention mainly solves the problems of poor photocatalytic performance, long photodegradation period and low degradation rate of the nano titanium dioxide prepared by the existing preparation method. The preparation method comprises the following steps: taking ramie fiber or ramie-fiber carboxymethyl cellulose and tetrabutyl titanate, dimethyl sulfoxide and absolute ethyl alcohol, carrying out ultrasonic reaction under room temperature, after ultrasonic reaction is finished, placing in the air for 8-20 hours of aging under the room temperature, then carrying out suction filtration, cleaning with the absolute ethyl alcohol, drying for 5-10 hours at the temperature of 60-70 DEG C, and thus obtaining nano titanium dioxide / ramie-fiber composite material or nano titanium dioxide / ramie-fiber carboxymethyl cellulose composite material, and then calcining the composite material for 0.5-3 hours in the air atmosphere with the temperature of 200-1000 DEG C and the heating rate of 200 DEG C / h to obtain nano titanium dioxide with photocatalytic performance.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of nano titanium dioxide, and in particular relates to a preparation method of nano titanium dioxide with photocatalytic performance. Background technique [0002] As a special transition metal oxide, titanium dioxide has high oxidation ability, photostability, high quantum yield, high surface activity, good light absorption performance and strong ability to absorb ultraviolet rays when its size reaches nanoscale. advantage. It is widely used as a catalyst material for photocatalytic degradation of organic pollutants. Today's rapid social and economic development has also brought serious problems such as environmental pollution, especially the water pollution produced by industrial industries is becoming more and more serious, which seriously threatens nature. How to solve water pollution has become an urgent problem for countries all over the world. Due to its excellent photocatalyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C02F1/30C02F101/30
CPCC02F1/30B01J21/063C02F2101/30B01J35/39
Inventor 姚树山智丽飞张敏刚
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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