Efficient formaldehyde-removing spraying agent and preparation method and application thereof

A formaldehyde and spray technology, which is applied in the field of high-efficiency formaldehyde removal spray and its preparation, can solve the problem of low formaldehyde removal efficiency and achieve long-term effective and high-efficiency removal of formaldehyde

Inactive Publication Date: 2017-06-23
SHANGHAI NAT ENG RES CENT FORNANOTECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to aim at the shortcoming that the existing photocatalyst formaldehyde removal efficiency is not high, provide a kind of ternary nano-composite powder of three kinds of photocatalysts of zinc oxide, titanium oxide and iron oxide by adopting the supercritical method, and utilize this Preparation method of novel high-efficiency formaldehyde-removing spray prepared by nano-powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh zinc nitrate, titanium tetrachloride, ferric chloride and ethanol (the molar ratio of titanium tetrachloride to zinc nitrate is 1:0.5; the molar ratio of titanium tetrachloride to ferric chloride is 1:1; tetrachloride The molar ratio of titanium to ethanol is 1:40), first add titanium tetrachloride, zinc nitrate and ferric chloride into ethanol, adjust PH=2~3 by adding acetic acid dropwise, and stir to make it fully dissolved; then mix The solution is added to the supercritical reactor, and the temperature (70°C) and pressure (20MPa) are controlled, and the pressure is maintained for a certain period of time (12 hours). Zinc oxide, titanium oxide and iron oxide ternary nano-composite powder can be obtained after the pressure is relieved; the prepared ternary nano-composite powder is mixed with a certain amount of dispersant and deionized water (ternary nano-composite powder and dispersant The mass of the ternary nanocomposite powder and deionized water is 1:0.2, an...

Embodiment 2

[0021] Weigh zinc nitrate, titanium tetrachloride, ferric chloride and ethanol (the molar ratio of titanium tetrachloride to zinc nitrate is 1:1; the molar ratio of titanium tetrachloride to ferric chloride is 1:3; tetrachloride The molar ratio of titanium to ethanol is 1:50), first add titanium tetrachloride, zinc nitrate and ferric chloride to ethanol, adjust PH=2~3 by dripping acetic acid, and stir to make it fully dissolved; then mix The solution is added to the supercritical reactor, the temperature (80°C) and pressure (30MPa) are controlled, and the pressure is maintained for a certain period of time (36 hours). Zinc oxide, titanium oxide and iron oxide ternary nano-composite powder can be obtained after the pressure is relieved; the prepared ternary nano-composite powder is mixed with a certain amount of dispersant and deionized water (ternary nano-composite powder and dispersant The quality of the ternary nanocomposite powder and deionized water is 1:0.3, and the qualit...

Embodiment 3

[0023] Weigh zinc nitrate, titanium tetrachloride, ferric chloride and ethanol (the molar ratio of titanium tetrachloride to zinc nitrate is 1:55; the molar ratio of titanium tetrachloride to ferric chloride is 1:3; tetrachloride The molar ratio of titanium to ethanol is 1:60), first add titanium tetrachloride, zinc nitrate and ferric chloride to ethanol, adjust PH=2~3 by dripping acetic acid, and stir to make it fully dissolved; then mix The solution is added to the supercritical reactor, and a certain temperature (60°C) and pressure (25MPa) are controlled, and the pressure is maintained for a certain period of time (24 hours). Zinc oxide, titanium oxide and iron oxide ternary nano-composite powder can be obtained after the pressure is relieved; the prepared ternary nano-composite powder is mixed with a certain amount of dispersant and deionized water (ternary nano-composite powder and dispersant The quality of the ternary nanocomposite powder and deionized water is 1:0.4, and...

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PUM

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Abstract

The invention discloses a preparation method of an efficient formaldehyde-removing spraying agent. The method comprises the following steps of (1) weighing zinc nitrate, titanium tetrachloride, ferric chloride and ethyl alcohol, adding the titanium tetrachloride, the zinc nitrate and the ferric chloride into the ethyl alcohol, adjusting PH to 2 to 3 by dropwise adding acetic acid, and stirring to fully dissolve the materials; (2) adding an obtained mixed solution into a supercritical reaction still, controlling certain temperature and pressure, keeping the pressure for a certain time, and after decompression, obtaining zinc oxide, titanium oxide and ferric oxide ternary nanometer composite powder; and (3) mixing the powder, a dispersant and deionized water, adding an obtained mixture into a grinder, and controlling appropriate grinding conditions, wherein finally prepared dispersion liquid is the efficient formaldehyde-removing spraying agent disclosed by the invention. The efficient formaldehyde-removing spraying agent prepared by the method provided by the invention is efficient in removing formaldehyde; the formaldehyde-removing spraying agent is effective for a long time in removing the formaldehyde, and in a formaldehyde-removing process, environment friendliness is realized, and toxic and harmful substances are not generated.

Description

Technical field [0001] The invention belongs to the field of environmental protection, and specifically relates to a high-efficiency formaldehyde removal spray and a preparation method and application thereof. Background technique [0002] Formaldehyde is a colorless, irritating and easily soluble gas in water. It is a highly toxic substance, and formaldehyde ranks second on the priority control list of toxic chemicals in my country. [0003] The renovated room always has a pungent smell. If you stay for a longer time, people will experience dizziness, glare, sore throat, chest tightness and other adverse reactions. This is mostly an intuitive manifestation of the harm of formaldehyde. According to the analysis of indoor air testing data across the country, there are varying degrees of air pollution in the indoor air after renovation, of which formaldehyde pollution is the most serious. The main sources of indoor formaldehyde are indoor decoration materials and furniture, especia...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01D53/86B01D53/72
CPCB01D53/8668B01J23/80B01D2255/802B01D2255/20792B01D2255/20738B01D2255/20707B01J35/39
Inventor 何丹农徐少洪张春明林琳陈超王艳丽金彩虹黄钢莫国民
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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