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Preparation method, product and application of titanium-manganese codoped nano-zinc oxide

A nano-zinc oxide, co-doping technology, applied in chemical instruments and methods, separation methods, dispersed particle separation and other directions, can solve the problem of low formaldehyde removal efficiency, achieve long-term effective formaldehyde removal, improve formaldehyde removal efficiency, and remove formaldehyde. Efficient effect

Inactive Publication Date: 2018-01-16
SHANGHAI NAXU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing titanium-manganese co-doped nano-zinc oxide in view of the shortcomings of the existing photocatalyst formaldehyde removal efficiency is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take zinc nitrate, titanium tetrachloride, manganese chloride and complexing agent (the mol ratio of zinc nitrate and titanium tetrachloride is 1:0.01, the mol ratio of zinc nitrate and manganese chloride is 1:1:0.02, nitric acid The mol ratio of zinc and complexing agent is 1:0.02, and the mol ratio of zinc nitrate and distilled water is 1:300, and complexing agent is diethanolamine), at first titanium tetrachloride, zinc nitrate and manganese chloride are added in distilled water, Adjust PH=2~3 by adding acetic acid dropwise, stir to make it fully dissolved, then add complexing agent, stir well; then add the mixed solution into the supercritical reactor, control a certain temperature (70°C) and pressure (20MPa) , and keep the pressure for a certain period of time (12 hours). After the pressure is released, titanium and manganese are co-doped with zinc oxide composite powder.

Embodiment 2

[0023] Take zinc nitrate, titanium tetrachloride, manganese chloride and complexing agent (the mol ratio of zinc nitrate and titanium tetrachloride is 1:0.02, the mol ratio of zinc nitrate and manganese chloride is 1:1:0.03, nitric acid The mol ratio of zinc and complexing agent is 1:0.05, and the mol ratio of zinc nitrate and distilled water is 1:300, complexing agent is diethylene triamine pentacarboxylate), at first titanium tetrachloride, zinc nitrate and chlorine Add manganese chloride into distilled water, adjust PH=2~3 by dropwise adding acetic acid, stir to make it fully dissolved, then add complexing agent, stir well; then add the mixed solution into the supercritical reaction kettle, control a certain temperature (80°C ) and pressure (30MPa), and keep the pressure for a certain period of time (36 hours). After the pressure is released, titanium and manganese are co-doped with zinc oxide composite powder.

Embodiment 3

[0025] Take zinc nitrate, titanium tetrachloride, manganese chloride and complexing agent (the mol ratio of zinc nitrate and titanium tetrachloride is 1:0.02, the mol ratio of zinc nitrate and manganese chloride is 1:1:0.01, nitric acid The mol ratio of zinc and complexing agent is 1:0.01, and the mol ratio of zinc nitrate and distilled water is 1:100, and complexing agent is disodium edetate), at first titanium tetrachloride, zinc nitrate and chloride Add manganese into distilled water, adjust PH=2~3 by dropping acetic acid, stir to make it fully dissolved, then add complexing agent, stir well; then add the mixed solution into the supercritical reactor, control a certain temperature (60°C) And pressure (25MPa), and keep the pressure for a certain period of time (24 hours). After the pressure is released, titanium and manganese are co-doped with zinc oxide composite powder.

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PUM

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Abstract

The invention discloses a preparation method, a product and application of titanium-manganese codoped nano-zinc oxide. The preparation method comprises the following steps: putting titanium tetrachloride, zinc nitrate and manganese chloride into water, dropping acetic acid to adjust the pH value to 2-3, adding a complexing agent, and sufficiently stirring; putting a mixed solution into a supercritical reaction kettle, controlling certain temperature and pressure, keeping the pressure for a certain time, and releasing the pressure, thereby obtaining titanium-manganese codoped nano-zinc oxide composite powder. The titanium-manganese codoped nano-zinc oxide composite powder prepared by using the method is high in formaldehyde removal efficiency, is capable of relatively well removing formaldehyde in a visible light zone, has a long-lasting formaldehyde removal effect, is green and environmental-friendly in the formaldehyde removal process and is free of toxic or harmful substance.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a preparation method of titanium-manganese co-doped nano-zinc oxide and its product and application. Background technique [0002] Formaldehyde is a colorless, irritating, water-soluble gas. It is a highly toxic substance, and formaldehyde ranks second on the list of priority control of toxic chemicals in my country. [0003] Toxic effect of formaldehyde on human body. It is mainly toxic to the eyes, respiratory system, lung function, nervous system function and immune system. Carcinogenic effect of formaldehyde on human body. Formaldehyde is also a strong mutagenic and carcinogenic substance, and is one of the risk factors for tumor death. Various animal experiments have proved that formaldehyde is both a carcinogen and a cancer accelerator. More reports have shown that the tumor mortality rate of people exposed to formaldehyde was significantly higher tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72
Inventor 何丹农徐少洪王敬锋林琳陈超张现金彩虹
Owner SHANGHAI NAXU IND
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