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An easily recyclable and reusable nanocrystalline tio 2 Coated hollow glass micropearlescent catalyst and preparation method thereof

A hollow glass microbead and hollow glass microtechnology, which is applied in the field of sewage treatment agent and its preparation, can solve the problems of complex preparation process, poor economic benefit, etc. The effect of recyclability and reusability

Active Publication Date: 2020-07-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation process of titanium dioxide-coated hollow glass microspheres, not only the surface of the hollow glass microspheres needs to be treated, but also the subsequent high-pressure or high-temperature calcination heat treatment is required. The preparation process is complicated and the economic benefit is poor.

Method used

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  • An easily recyclable and reusable nanocrystalline tio <sub>2</sub> Coated hollow glass micropearlescent catalyst and preparation method thereof
  • An easily recyclable and reusable nanocrystalline tio <sub>2</sub> Coated hollow glass micropearlescent catalyst and preparation method thereof
  • An easily recyclable and reusable nanocrystalline tio <sub>2</sub> Coated hollow glass micropearlescent catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Disperse the hollow glass microspheres in deionized water to form a solution with a concentration of 10 g / L, and stir magnetically for 30 minutes to ensure that the hollow glass microspheres are fully dispersed in the deionized water; heat up the dispersed hollow glass microspheres solution to 30°C, and Add a certain amount of TiCl with a concentration of 1.0mol / L dropwise at a speed of 1.5mL / h 4 solution, so that the generated TiO 2 The ratio of mass to hollow glass microspheres is 1:30, and TiO is synthesized in situ on the surface of hollow glass microspheres 2 ; the TiO 2 The coated hollow glass microsphere solution was aged for 2 hours; after the aging was completed, the product was filtered, washed with water, and dried in an oven at 105°C for 24 hours.

Embodiment 2

[0027] Disperse the hollow glass microspheres in deionized water to form a solution with a concentration of 20 g / L, and stir magnetically for 30 minutes to ensure that the hollow glass microspheres are fully dispersed in the deionized water; heat up the dispersed hollow glass microspheres solution to 60°C, and A certain amount of TiCl with a concentration of 0.3mol / L was dripped at a rate of 5mL / h 4 solution, so that the generated TiO 2 The ratio of mass to hollow glass microspheres is 1:15, and TiO is synthesized in situ on the surface of hollow glass microspheres 2 ; the TiO 2The coated hollow glass microsphere solution was aged for 3 hours; after the aging was completed, the product was filtered, washed with water, and dried in an oven at 105°C for 24 hours.

Embodiment 3

[0029] Disperse the hollow glass microspheres in deionized water to form a solution with a concentration of 50 g / L, and stir magnetically for 30 minutes to ensure that the hollow glass microspheres are fully dispersed in the deionized water; heat up the dispersed hollow glass microspheres solution to 80 ° C, and Add a certain amount of TiCl with a concentration of 0.15mol / L dropwise at a speed of 10mL / h 4 solution, so that the generated TiO 2 The ratio of mass to hollow glass microspheres is 1:4, and TiO is synthesized in situ on the surface of hollow glass microspheres 2 ; the TiO 2 The coated hollow glass microsphere solution was aged for 2 hours; after the aging was completed, the product was filtered, washed with water, and dried in an oven at 105°C for 24 hours.

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Abstract

The invention relates to an easily recyclable and reusable nanocrystalline TiO 2 Coated hollow glass microbead photocatalyst is prepared by first dispersing the hollow glass microbeads in deionized water, stirring and dispersing; then, heating the solution to a certain temperature, adding TiCl 4 The solution is slowly dropped into the hollow glass bead solution as a precursor, and the photocatalyst nanocrystalline TiO is synthesized in situ on the surface of the hollow glass bead. 2 ; Then, it is aged for a certain period of time; finally, the product is filtered, washed, and dried to prepare an easily recyclable and reusable nanocrystalline TiO 2 Coated hollow glass microbeads photocatalyst. The photocatalytic sewage treatment agent of the present invention has the performance of highly efficient photodegradation of organic pollutants in waste water, and its density is smaller than that of water, which is beneficial to the recovery and reuse of photocatalytic materials and the recycling of water resources.

Description

technical field [0001] The invention belongs to the field of photocatalytic sewage treatment materials, and in particular relates to an easily recyclable and reusable sewage treatment agent and a preparation method thereof. Background technique [0002] The treatment of high-concentration organic wastewater and the recycling of water resources are important links to achieve sustainable development. With the rapid development of the economy, the amount of organic sewage generated by industries such as chemical industry, metallurgy, coal coking, pharmaceuticals, building materials, and textiles continues to increase, and the types of wastewater are complex. Therefore, the treatment of industrial wastewater pollution and the recycling of water resources have become the focus of common attention at home and abroad. [0003] Photocatalysis is an advanced oxidation technology that uses semiconductor materials as catalysts. When the semiconductor materials are irradiated by photon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J21/08C02F1/30C02F101/36C02F101/38
CPCC02F1/30B01J21/063B01J21/08B01J23/002C02F2305/10C02F2101/308C02F2101/36C02F2101/38C02F2101/40B01J35/39
Inventor 姜海波李春忠江浩沈建华吴王超崔健
Owner EAST CHINA UNIV OF SCI & TECH