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Environmental cleaning material with anti-microbial and photo-catalysis functions and preparation method thereof

An environmental purification, dual-function technology, applied in the field of environmental pollution control, can solve the problems of difficult recovery of photocatalysts, unfavorable large-scale production, easy dispersion and suspension, etc., to achieve improved photocatalytic activity, low cost and improved photocatalytic performance. Effect

Active Publication Date: 2017-07-28
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In "Preparation and Performance Research of Silver-doped Nano Titanium Dioxide Montmorillonite Composite Antibacterial Agent" (Journal of Yan'an University, June 2015, Volume 34, No. 2), a silver-doped nano-titanium dioxide montmorillonite was disclosed. However, this kind of material is easy to disperse and suspend in the liquid phase, and there is a problem that the photocatalyst is difficult to recover in practical applications, and this kind of material is too much silver-doped, and the cost is too high, which is not conducive to large-scale production
[0006] TiO is ubiquitous in the prior art 2 Easy to agglomerate, low adsorption capacity and difficult to separate from solid-liquid systems

Method used

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  • Environmental cleaning material with anti-microbial and photo-catalysis functions and preparation method thereof
  • Environmental cleaning material with anti-microbial and photo-catalysis functions and preparation method thereof
  • Environmental cleaning material with anti-microbial and photo-catalysis functions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1 The preparation of the environmental purification material with antibacterial and photocatalytic dual functions of the present invention (sample F).

[0057] Measure 17ml of butyl titanate, slowly add it to 40ml of absolute ethanol, place it on a magnetic stirrer and stir at a certain speed, and finally add 3ml of glacial acetic acid to obtain solution A; take another beaker, add 0.0425g of silver nitrate, 10ml of absolute ethanol, 2ml of deionized water to obtain solution B; stir solution A at a certain rate, drop solution B into solution A at a rate of 2 drops per second, after the dropwise addition, adjust with nitric acid pH+ Ion doped nano TiO 2 / Diatomite environmental purification material.

[0058] The SEM image of the material is shown in image 3 As shown, it can be seen from the figure that most of the TiO 2 The particles are evenly distributed on the surface of the diatomite disc structure, only a small part of TiO 2 aggregated together, and m...

Embodiment 2

[0060] Example 2 The preparation of the environmental purification material with antibacterial and photocatalytic dual functions of the present invention (sample G).

[0061] Measure 17ml of butyl titanate, slowly add it to 40ml of absolute ethanol, place it on a magnetic stirrer and stir at a certain speed, and finally add 3ml of glacial acetic acid to obtain solution A; take another beaker, add 0.085g of silver nitrate, 10ml of absolute ethanol, 2ml of deionized water to obtain solution B; stir solution A at a certain rate, drop solution B into solution A at a rate of 2 drops per second, after the dropwise addition, adjust with nitric acid pH+ Ion doped nano TiO 2 / Diatomite environmental purification material.

[0062] Take the obtained sample G as the photocatalyst, methylene blue as the target degradation product, irradiate with ultraviolet light for 6 hours, take 10ml suspension every 1 hour, and take a small amount of supernatant after centrifugation to test its absor...

Embodiment 3

[0063] Example 3 The preparation of the environmental purification material with antibacterial and photocatalytic dual functions of the present invention (sample J).

[0064] Measure 17ml of butyl titanate, slowly add it to 40ml of absolute ethanol, place it on a magnetic stirrer and stir at a certain speed, and finally add 3ml of glacial acetic acid to obtain solution A; take another beaker, add 0.085g of silver nitrate, 10ml of absolute ethanol, 2ml of deionized water to obtain solution B; stir solution A at a certain rate, drop solution B into solution A at a rate of 2 drops per second, after the dropwise addition, adjust with nitric acid pH+ Ion doped nano TiO 2 / Diatomite environmental purification material.

[0065] Take the obtained sample J as the photocatalyst, methylene blue as the target degradation product, irradiate with ultraviolet light for 6 hours, take 10ml suspension every 1 hour, and take a small amount of supernatant after centrifugation to test its absor...

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Abstract

The invention relates to an environmental cleaning material with anti-microbial and photo-catalysis functions and a preparation method thereof and belongs to the technical field of environmental pollution control. According to the invention, a sol-gel method is adopted for preparing an Ag ion doped nanometer TiO2 / kieselguhr environmental cleaning material. The environmental cleaning material with anti-microbial and photo-catalysis functions prepared according to the invention can overcome the defects of TiO2, such as, easiness in agglomerating, low adsorption capacity and difficulty in separating from a solid-liquid system; the slow release and discoloring of silver ions can be prevented; the compounding of electron-hole pairs can be avoided, so that the photocatalytic activity of TiO2 can be promoted; and the functions, such as, an antibacterial effect without a light source, can be realized.

Description

technical field [0001] The invention relates to an environmental purification material with dual functions of antibacterial and photocatalysis and its preparation, which belongs to the technical field of environmental pollution control. Background technique [0002] Photocatalysis refers to the process in which materials convert light energy into chemical energy under light conditions to degrade or synthesize compounds. At present, the materials found to have photocatalytic phenomena are mainly some semiconductors, including ZnO, TiO 2 , WO 3 , SnO 2 etc., where TiO 2 Semiconductors are in a leading position in the research of photocatalytic materials due to their easy availability, stable chemical properties, strong photocorrosion resistance, and strong oxidation ability. But nano TiO 2 The band gap of the semiconductor is about 3.2eV, and its band gap directly determines that the longest wavelength for excited electrons to transition from the valence band to the condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50A01N59/16A01N59/00A01P1/00
CPCA01N59/00A01N59/16B01J23/002B01J23/50B01J35/39A01N2300/00
Inventor 邱克辉马朋朋张佩聪李峻峰周世杰
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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