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Preparation method of activated carbon fiber membrane loaded TiO2/ZnO photocatalyst

A technology of activated carbon fiber and photocatalyst, which is applied in the field of porous nanomaterials, can solve the problems of increased preparation cost, catalyst shedding, and low loading capacity, and achieve the effects of simple preparation method, large specific surface area, and high porosity

Inactive Publication Date: 2017-07-21
武夷学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the following disadvantages: 1) the activated carbon fiber is expensive, which greatly increases the preparation cost; 2) the semiconductor oxide is not firmly loaded on the fiber, and catalysts often fall off during use; 3) the amount of semiconductor oxide loaded on the fiber Low, in order to increase the loading capacity, it usually needs to be loaded multiple times, which further increases the preparation cost

Method used

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  • Preparation method of activated carbon fiber membrane loaded TiO2/ZnO photocatalyst
  • Preparation method of activated carbon fiber membrane loaded TiO2/ZnO photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A kind of active carbon fiber loaded TiO that this embodiment relates to 2 / ZnO photocatalyst preparation method, such as figure 1shown, including the following steps:

[0039] 1. Add 5g of cellulose acetate into 55g of dimethylformamide solvent, stir magnetically for 3 hours to dissolve completely, add 1.5g of zinc acetate to the cellulose acetate / dimethylformamide solution, stir magnetically for 3 hours at room temperature to make it completely dissolve. Add 1.2 g of tetrabutyl titanate into a mixed solvent of 30 g of dimethylformamide and 2 g of glacial acetic acid, and dissolve under magnetic stirring at room temperature. The two solutions prepared above were mixed together, and magnetically stirred for 3 hours at room temperature to obtain a quenching solution.

[0040] 2. Pour the above-mentioned quenching solution into a petri dish with a diameter of 7.5 cm, and put it into a preset -20°C low-temperature refrigerator for quenching for 60 minutes. After quench...

Embodiment 2

[0047] A kind of active carbon fiber loaded TiO that this embodiment relates to 2 The preparation method of / ZnO photocatalyst comprises the steps:

[0048] 1. Add 7g of cellulose acetate into 60g of dimethylformamide solvent, stir magnetically for 3 hours to make it completely dissolved, add 0.8g of zinc acetate to the cellulose acetate / dimethylformamide solution, stir magnetically for 3 hours at room temperature to make it completely dissolve. 1 g of tetrabutyl titanate was added into a mixed solvent of 34 g of dimethylformamide and 2 g of glacial acetic acid, and dissolved by magnetic stirring at room temperature. The two solutions prepared above were mixed together, and magnetically stirred for 3 hours at room temperature to obtain a quenching solution.

[0049] 2. Pour the above quenching solution into a petri dish with a diameter of 7.5 cm, and put it into a preset -30°C refrigerator for quenching for 60 minutes. After quenching, quickly take out the Petri dish, add 30...

Embodiment 3

[0056] A kind of active carbon fiber loaded TiO that this embodiment relates to 2 The preparation method of / ZnO photocatalyst comprises the steps:

[0057] 1. Add 7g of cellulose acetate to 60g of dimethylformamide solvent, stir magnetically for 3 hours to dissolve completely, add 1g of zinc acetate to the cellulose acetate / dimethylformamide solution, stir magnetically for 3 hours at room temperature to dissolve completely . 1 g of tetrabutyl titanate was added into a mixed solvent of 34 g of dimethylformamide and 2 g of glacial acetic acid, and dissolved by magnetic stirring at room temperature. The two solutions prepared above were mixed together, and magnetically stirred for 3 hours at room temperature to obtain a quenching solution.

[0058] 2. Pour the above quenching solution into a petri dish with a diameter of 7.5 cm, and put it into a preset -30°C refrigerator for quenching for 60 minutes. After quenching, quickly take out the Petri dish, add 300mL ethanol to the P...

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Abstract

The invention discloses a preparation method of an activated carbon fiber membrane loaded TiO2 / ZnO photocatalyst. The preparation method comprises the following steps: respectively preparing a cellulose acetate solution and a precursor solution; evenly mixing the cellulose acetate solution and the precursor solution to obtain a quenching solution; carrying out thermally induced phase separation on the quenching solution at the temperature of minus 50-0 DEG C to obtain CA / TiO2 / ZnAc composite fibers; and after hydrolyzing the CA / TiO2 / ZnAc composite fibers in an ethanol solution of sodium hydroxide, soaking and activating the CA / TiO2 / ZnAc composite fibers in an ammonium chloride solution at the temperature of 80 DEG C, and finally carbonizing the CA / TiO2 / ZnAc composite fibers in a nitrogen atmosphere at the temperature of 400-500 DEG C to obtain the activated carbon fiber membrane loaded TiO2 / ZnO photocatalyst. The preparation method has the beneficial effects that a thermally induced phase separation method and an activating and carbonizing method are used together, the various raw materials are easily obtained, and the preparation method is simple.

Description

technical field [0001] The invention relates to an activated carbon fiber loaded TiO 2 The invention relates to a preparation method of ZnO photocatalyst, which belongs to the technical field of porous nanometer materials. Background technique [0002] Semiconductor materials such as TiO 2 ZnO and ZnO have been widely used in the photocatalytic degradation of organic pollutants in water due to their size-tunable physical and chemical properties, high activity, and low cost. However, as a bulk semiconductor material, its photocatalytic activity is greatly reduced due to the rapid recombination of photogenerated electron-hole pairs. In order to improve its photocatalytic activity, TiO was chemically or physically 2 Composite with ZnO to prepare TiO 2 / ZnO composite nanocatalyst. The recombination is mainly to improve the following two purposes: 1) broaden the light absorption band and improve the light utilization rate; 2) inhibit the photogenerated electron-hole recombin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J23/002B01J23/06C02F2305/10C02F2101/34C02F2101/345C02F2101/36C02F2101/38C02F2101/40C02F2101/308B01J35/59B01J35/39
Inventor 胡家朋赵瑨云刘瑞来穆寄林郭绍英
Owner 武夷学院
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