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A kind of sol-gel preparation bi 2 moo 6 /A method of halloysite composite photocatalytic material

A composite photocatalysis and sol-gel technology, which is applied in the field of development and preparation of porous mineral composite photocatalytic materials, can solve the problems of high consumption of alkaline materials, pollution of alkaline wastewater, poor response to visible light, etc., and achieve less equipment requirements and easy operation , Ease of industrial production

Active Publication Date: 2020-04-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the above problems, the invention provides a sol-gel preparation of Bi 2 MoO 6 / A method for halloysite composite photocatalytic materials to solve the poor visible light response of existing halloysite nanotube composite photocatalytic materials and prepare Bi 2 MoO 6 Insufficient consumption of alkaline materials, inconvenient operation and pollution of alkaline wastewater

Method used

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  • A kind of sol-gel preparation bi <sub>2</sub> moo <sub>6</sub> /A method of halloysite composite photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Weigh 0.5821g Bi(NO 3 ) 3 ·5H 2 O, 0.931g halloysite nanotubes, 1g ethylene glycol and 8.73g absolute ethanol were ultrasonically stirred and mixed to obtain a mixture A;

[0028] (2) Weigh 1.1642g tartaric acid, 0.1054g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 8.73g deionized water to obtain solution B;

[0029] (3) Slowly add the solution B obtained in step (2) to the suspension A obtained in step (1), stir for 10 minutes to obtain the mixed solution C, and then place it in a 97°C water bath and stir for 8 hours to generate sol D;

[0030] (4) Put the sol D obtained in step (3) in a drying oven at 130°C for 18 hours, and then calcined in a muffle furnace at 600°C for 3 hours to obtain Bi 2 MoO 6 / Halloysite composite photocatalytic material.

[0031] combine figure 1 It can be seen that the Bi in the composite material 2 MoO 6 Good crystallinity.

Embodiment 2

[0033] (1) Weigh 0.7762g Bi(NO 3 ) 3 ·5H 2 O, 1g halloysite nanotubes, 0.831g ethylene glycol and 14g absolute ethanol are ultrasonically stirred and mixed to obtain a mixture A;

[0034] (2) Weigh 0.7762g tartaric acid, 0.1397g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 7.762g deionized water to obtain solution B;

[0035] (3) Slowly add the solution B obtained in step (2) to the suspension A obtained in step (1), stir for 30 minutes to obtain a mixed solution C, and then place it in a water bath at 90°C and stir for 5 hours to generate sol D;

[0036] (4) After drying the sol D obtained in step (3) in a 130°C drying oven for 10h, and then calcining in a muffle furnace at 400°C for 3h, Bi 2 MoO 6 / Halloysite composite photocatalytic material.

Embodiment 3

[0038] (1) Weigh 0.9832g Bi(NO 3 ) 3 ·5H 2 O, 1.31g halloysite nanotubes, 1.573g ethylene glycol and 16.5g absolute ethanol were ultrasonically stirred and mixed to obtain a mixture A;

[0039] (2) Weigh 1.47g tartaric acid, 0.178g (NH 4 ) 6 Mo 7 o 24 4H 2O was dissolved in 11.8g deionized water to obtain solution B;

[0040] (3) Slowly add the solution B obtained in step (2) to the suspension A obtained in step (1), stir for 15 minutes to obtain a mixed solution C, and then place it in a water bath at 95°C and stir for 7 hours to generate sol D;

[0041] (4) Dry the sol D obtained in step (3) in a 130°C drying oven for 12 hours, and then calcinate in a muffle furnace at 500°C for 2 hours to obtain Bi 2 MoO 6 / Halloysite composite photocatalytic material.

[0042] Performance test experiment:

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Abstract

The invention discloses a sol-gel preparation of Bi 2 MoO 6 / halloysite composite photocatalytic material, the preparation method of the present invention does not use an alkaline precipitant, is easy to operate, does not produce waste water, has a short process flow, requires less equipment, and is easy for industrial production; the Bi prepared by the present invention 2 MoO 6 / halloysite composite photocatalytic material has visible light catalytic properties and can be used for the photocatalytic degradation of organic dye wastewater and pharmaceutical wastewater.

Description

[0001] (1) Technical field [0002] The present invention relates to a kind of sol-gel preparation Bi 2 MoO 6 The invention discloses a method for a halloysite composite photocatalytic material, which belongs to the technical field of development and preparation of a porous mineral composite photocatalytic material. [0003] (2) Background technology [0004] The natural nanotubular mineral halloysite has the advantages of large specific surface area, high porosity and strong adsorption. Currently, halloysite is widely developed and studied as a photocatalyst carrier material. However, one of the shortcomings is that the halloysite carrier is mainly compounded with ultraviolet light-responsive photocatalytic materials, resulting in the inability to make full use of sunlight for photocatalytic degradation of pollutants; see the following references: ①The name of the Chinese invention patent is "Helloysite Preparation method of stone nanotube / nano-titanium dioxide composite mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28C02F1/30C02F101/30
CPCC02F1/30B01J23/28C02F2305/10C02F2101/308B01J35/39
Inventor 孙青盛嘉伟张俭吴坤
Owner ZHEJIANG UNIV OF TECH
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