VOCs separation and degradation film and preparation method thereof

A technology for degrading thin films and active components, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of high energy consumption, low separation and degradation efficiency of VOCs, etc., and achieve improved separation and degradation efficiency, excellent performance, To achieve the effect of complete degradation

Active Publication Date: 2020-04-28
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a VOCs separation and degradation film and its preparation method to solve the technical prob

Method used

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  • VOCs separation and degradation film and preparation method thereof
  • VOCs separation and degradation film and preparation method thereof
  • VOCs separation and degradation film and preparation method thereof

Examples

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preparation example Construction

[0033] as attached figure 1 As shown, the present invention provides a kind of preparation method that is used for VOCs separation degradation membrane, comprises the following steps:

[0034] Step 1, add copper nitrate, manganese nitrate and cerium nitrate in water, stir, obtain thermocatalytic system, wherein, in thermocatalytic system, Cu 2+ :Mn 2+ : Ce 2+ :H 2 The mass ratio of O is: (3-4):(3-4):(1-2):(6-9);

[0035] mixing tetrabutyl titanate and isopropanol in a volume ratio of (1-1.5): (2-3) to obtain a photocatalyst system;

[0036] Step 2, adding the photocatalytic system dropwise into the thermal catalytic system and stirring until a sol is formed to obtain the active component loading liquid;

[0037] Step 3, adding additives and precious metals to the active component loading liquid, stirring vigorously for 5-10 hours at a stirring speed of 400-600r / min; maintaining at room temperature for 5-6 hours to obtain a loaded precursor; One or more of silica sol, pho...

Embodiment 1

[0047] A method for preparing a VOCs separation and degradation film is provided in Example 1, comprising the following steps:

[0048] Step 1. Take quantitative copper nitrate, manganese nitrate and cerium nitrate reagents as required, add copper nitrate, manganese nitrate and cerium nitrate reagents to water, stir to obtain a thermocatalytic system; wherein, in the thermocatalytic system, Cu 2+ :Mn 2+ : Ce 2+ :H 2 The mass ratio of O is: 3:3:1:6; tetrabutyl titanate and isopropanol are mixed in a volume ratio of 1:2 to obtain a photocatalyst system;

[0049] Step 2, adding the photocatalytic system dropwise into the thermal catalytic system and stirring until a sol is formed to obtain the active component loading liquid;

[0050] Step 3. Add silica sol and platinum to the active component loading solution, stir vigorously for 5 hours at a stirring speed of 600r / min; maintain at room temperature for 5-6 hours to obtain a loaded precursor; silica sol and active component T...

Embodiment 2

[0060] A method for preparing a VOCs separation and degradation film is provided in Example 2, comprising the following steps:

[0061] Step 1. Weigh quantitative copper nitrate, manganese nitrate and cerium nitrate reagents as required, add copper nitrate, manganese nitrate and cerium nitrate reagents to water, stir to obtain a thermal catalytic system; wherein, in the thermal catalytic system, Cu 2+ :Mn 2+ : Ce 2+ :H 2 The mass ratio of O is: 4:4:1:8;

[0062] Tetrabutyl titanate and isopropanol are mixed in a volume ratio of 1.2:2.5 to obtain a photocatalyst system;

[0063] Step 2, adding the photocatalytic system dropwise into the thermal catalytic system and stirring until a sol is formed to obtain the active component loading liquid;

[0064] Step 3. Add phosphoric acid and palladium to the active component loading liquid, stir vigorously for 8 hours, and the stirring speed is 500r / min; at room temperature, maintain for 5-6 hours to obtain the loaded precursor; phos...

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Abstract

The invention relates to a VOCs separation and degradation film and a preparation method thereof, the preparation method comprises the following steps: adding copper nitrate, manganese nitrate and cerium nitrate into water, and stirring to obtain a thermocatalytic system; mixing tetrabutyl titanate with isopropanol to obtain a photocatalyst system; dropwise adding the photocatalytic system into the thermocatalytic system, and stirring to obtain an active component loading solution; adding an auxiliary agent and noble metal to obtain a loaded precursor; pretreating a ceramic microfiltration membrane to enable the pore size of the ceramic microfiltration membrane to be matched with the molecular size of VOCs, dipping and lifting in a load precursor to enable a thermal-photocatalyst to be naturally loaded on the ceramic microfiltration membrane, calcining and reducing to obtain the VOCs separation and degradation membrane. The thermal-photocatalyst is loaded on the ceramic microfiltrationmembrane, so that the pore diameter of the membrane is reduced, and VOCs gas separation and interception are met; and in-situ decomposition is carried out while organic pollutants are efficiently intercepted, so that the separation and degradation efficiency of VOCs molecules is effectively improved, and thorough degradation of VOCs is realized.

Description

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Claims

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Application Information

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Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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