Composite material of micro-loaded titanium oxide and silica gel and preparation method thereof

A composite material, titanium oxide technology, applied in chemical instruments and methods, separation methods, silicon compounds, etc., can solve the problems of easy desorption and instability, and achieve the effects of preventing agglomeration, improving efficiency and low process cost.

Active Publication Date: 2020-09-01
伦慧东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is not stable, and it is easy to desorb under certain conditions, that is, the adsorbed harmful gas is released back into the room, for example, the material is saturated, or the room temperature rises. At this time, the adsorption material itself becomes a source of pollution instead.

Method used

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  • Composite material of micro-loaded titanium oxide and silica gel and preparation method thereof
  • Composite material of micro-loaded titanium oxide and silica gel and preparation method thereof
  • Composite material of micro-loaded titanium oxide and silica gel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0055] Step 1. Preparation of Micro-supported Titanium Oxide Suspension

[0056] 1.1. Weigh 5g of the complexing agent ethylenediaminetetraacetic acid disodium salt (EDTA for short) and dissolve it in 100g of deionized water to prepare an EDTA aqueous solution with a concentration of 5%;

[0057] 1.2. Under stirring, weigh 146.5g of copper nitrate and dissolve it in the above EDTA aqueous solution to prepare Cu 2+ Cu at a concentration of 0.5 g / mL 2+ complexing solution;

[0058] 1.3. Add 200g nano mixed crystal titanium oxide to 1000g deionized water, stir for 5 minutes, ultrasonic for 3 minutes, ultrasonic power 200W to make mixed crystal titanium oxide suspension, in which rutile type nano titanium oxide and anatase type nano titanium oxide are mixed. The mass ratio of titanium oxide is 1:1;

[0059] 1.4. Under stirring, add 5 mL of the Cu described in step 1.2 to the 2+ The complex solution is slowly added dropwise to the mixed crystal titanium oxide suspension describ...

Embodiment 3

[0064] Step 1. Preparation of Micro-supported Titanium Oxide Suspension

[0065] 1.1. Weigh 1 g of complexing agent EDTA and dissolve it in 100 g of deionized water to prepare an EDTA aqueous solution with a concentration of 1%;

[0066] 1.2. Under stirring, weigh 29.1 g of ferric chloride and dissolve it in the above-mentioned EDTA aqueous solution to prepare Fe 3+ Fe at a concentration of 0.1 g / mL 3+ complexing solution;

[0067] 1.3. Add 200g nano mixed crystal titanium oxide to 1000g deionized water, stir for 5 minutes, ultrasonic for 3 minutes, ultrasonic power 200W to make mixed crystal titanium oxide suspension, in which rutile type nano titanium oxide and anatase type nano titanium oxide are mixed. The mass ratio of titanium oxide is 1:2;

[0068] 1.4. Under stirring, add 2 mL of Fe 3+ The complex solution is slowly added dropwise to the mixed crystal titanium oxide suspension described in step 1.3, heated to 30~40°C and stirred for 0.5~1h to prepare Fe 3+ / TiO 2...

Embodiment 4

[0078] Step 1. Preparation of Micro-supported Titanium Oxide Suspension

[0079] 1.1. Dissolve the complexing agent sodium gluconate in deionized water to prepare an aqueous solution of sodium gluconate with a concentration of 10%;

[0080] 1.2. Under stirring, dissolve silver nitrate in sodium gluconate aqueous solution to prepare Ag + Ag at a concentration of 0.01g / ml + complexing solution;

[0081] 1.3. Add 200g nano mixed crystal titanium oxide to 1000g deionized water, stir for 5 minutes, ultrasonic for 3 minutes, ultrasonic power 200W to make mixed crystal titanium oxide suspension, in which rutile type nano titanium oxide and anatase type nano titanium oxide are mixed. The mass ratio of titanium oxide is 1:10;

[0082] 1.4. Under stirring, the Ag + The complexing solution was slowly added dropwise to the mixed crystal titanium oxide suspension to make Ag + / TiO 2 The mass ratio is 1 / 1000, and the reaction is stirred at 30-35° C. for 1 hour to obtain a micro-suppor...

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Abstract

The invention discloses a composite material of micro-supported titanium oxide and silica gel and a preparation method thereof. The composite material comprises silica gel particles and micro-supported titanium oxide on the silica gel particles. The weight ratio of the silica gel particles to the micro-supported titanium oxide is 100: 0.1-10. The micro-supported titanium oxide is mixed crystal titanium oxide of which the surface is loaded with 0.01-1.0 wt% of Fe<3+>, Cu<2+> or precious metal. The mixed crystal titanium oxide is prepared from rutile-type and anatase-type nanometer titanium oxide according to a weight ratio of 10: 1 to 1: 10 through uniform mixing. The micro-supported titanium oxide is prepared from deionized water through a complexation method at the normal temperature and is free of pH adjustment to less than 7. Through combination of a photocatalyst and silica gel, harmful gas desorption caused by single use of silica gel is avoided and air purification effects of the photocatalyst are improved.

Description

technical field [0001] The invention belongs to the field of air purification materials, in particular to a titanium oxide photocatalyst, in particular to a composite material of micro-supported titanium oxide and silica gel and a preparation method thereof. Background technique [0002] Health problems caused by indoor air pollution are beginning to gain widespread attention. Indoor air pollutants mainly include formaldehyde, benzene, toluene, xylene, volatile organic compounds (VOC) and ammonia, etc., mainly from artificial boards, latex paints, wallpapers, adhesives, etc. used in interior decoration. Data shows that more than 60% of newly renovated houses in major cities in my country have formaldehyde, VOC, and benzene pollution problems, especially formaldehyde exceeding the standard, and formaldehyde is an internationally recognized strong carcinogen, which can cause chronic respiratory diseases, nasopharyngeal cancer, colon Cancer, brain tumor, neonatal chromosomal ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/30B01D53/86B01D53/72B01J21/06
CPCB01D53/8634B01D53/8668B01D2255/102B01D2255/1021B01D2255/104B01D2255/106B01D2255/20707B01D2255/20738B01D2255/20761B01D2257/406B01D2257/70B01D2257/7027B01D2257/708B01J20/103B01J21/063B01J35/004
Inventor 伦慧东
Owner 伦慧东
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