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Porous titanium-based photocatalytic material and preparing method thereof

A technology of photocatalytic materials and porous titanium, applied in chemical instruments and methods, separation methods, physical/chemical process catalysts, etc., can solve the problems of limited improvement of photocatalytic activity, difficult industrialization, and low specific surface area, and achieve pore formation High efficiency, easy process control, and large specific surface area

Inactive Publication Date: 2017-04-26
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the source of the template, the state of pore formation, and the strength and activity of the catalyst, there are still deficiencies, and it is difficult to industrialize
[0004] The Chinese patent application whose publication number is CN 101032684A discloses a method for preparing macroporous / mesoporous TiO 2 method, but the specific surface area of ​​the obtained material is low, the pore volume is small, and the improvement of photocatalytic activity is limited.

Method used

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  • Porous titanium-based photocatalytic material and preparing method thereof
  • Porous titanium-based photocatalytic material and preparing method thereof
  • Porous titanium-based photocatalytic material and preparing method thereof

Examples

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Embodiment 1

[0042] weigh β - Put 6.0 g of cyclodextrin in a three-necked flask with mechanical stirring, add 10 mL of NaOH solution with a mass fraction of 20%, and stir homogeneously with ultrasonic waves. Slowly add an appropriate amount of epichlorohydrin dropwise at 30°C under constant stirring to allow the reaction to proceed for a certain period of time. Under high-speed stirring, add an appropriate amount of oil phase containing emulsifier (Span-80: Tween-20 = 3:1) 60 mL, reduce the stirring speed after 10 min, raise the system to 70 °C, and continue stirring for 7 h . After the reaction is over, let it stand still, filter the microsphere product with suction, and wash thoroughly with dilute hydrochloric acid, absolute ethanol, ultrapure water, and acetone in sequence to remove various impurities. Place in a fume hood to dry at room temperature, and then dry to constant weight in a vacuum oven at 50 °C to obtain β - Cyclodextrin microspheres spherical particles. After drying, i...

Embodiment 2

[0046] 4.2 mL of TBOT and 15 mL of anhydrous EtOH were fully stirred in a beaker until uniformly mixed, and a light yellow transparent solution A was obtained. Weighing 0.8868 g β - Put the CD microspheres in 10 mL of absolute ethanol, add 55 mL of deionized water, 2 mL of glacial acetic acid, and wash with concentrated HNO 3 Adjust the pH value of the solution to 2-3 to obtain a transparent solution B. Under the condition of sufficient stirring, slowly drop the A solution into the B solution. After the dropwise addition, continue to stir for 2 h to obtain a transparent light yellow wet gel, seal it with plastic wrap, and age for several days to obtain TiO 2 gel, put it in a constant temperature drying oven at 100 o C dried for 12 h to obtain xerogel. Place the xerogel in a crucible. Set muffle furnace heating rate 2 o C / min, 400 o Under the condition of C, after calcination for 2 h, the ground porous TiO 2 photocatalytic material. The resulting TiO 2 Photocatalytic ...

Embodiment 3

[0048] 4.2 mL of TBOT and 15 mL of anhydrous EtOH were fully stirred in a beaker until uniformly mixed, and a light yellow transparent solution A was obtained. Weighing 0.8346 g β - Put the CD microspheres in 10 mL of absolute ethanol, add 55 mL of deionized water, 2 mL of glacial acetic acid, and wash with concentrated HNO 3 Adjust the pH value of the solution to 2-3 to obtain a transparent solution B. Under the condition of sufficient stirring, slowly drop the A solution into the B solution. After the dropwise addition, continue to stir for 2 h to obtain a transparent light yellow wet gel, seal it with plastic wrap, and age for several days to obtain TiO 2 gel, put it in a constant temperature drying oven at 100 o C dried for 12 h to obtain xerogel. Place the xerogel in a crucible. Set muffle furnace heating rate 2 o C / min, 400 o Under the condition of C, after calcination for 2 h, the ground porous TiO 2 photocatalytic material.

[0049] The porous TiO prepared abo...

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Abstract

The invention relates to a porous titanium-based photocatalytic material and a preparing method thereof. The preparing method of the porous material includes the following steps that beta-cyclodextrin (beta-CD) is used as a raw material, and beta-CD microspheres uniform in size are synthesized through an inverse emulsion polymerization; with the beta-CD microspheres as the template, a gel-shaped titanium-based catalytic material precursor is prepared through a sol-gel method, and the porous material is prepared through aftertreatment technologies such as drying, calcining and grinding. The porous titanium-based photocatalytic material prepared through the method is loose in structure and has a great number of pores. The method is simple in process and easy to operate, the preparing process is clean, and the obtained photocatalytic material represents good photocatalytic degradation capacity to printing and dyeing wastewater and volatile organic compounds and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a porous titanium-based photocatalytic material and a preparation method thereof, in particular to a β -Titanium-based photocatalytic material with porous structure prepared by CD microspheres, preparation method and application thereof. Background technique [0002] Since the discovery of photocatalytic water splitting by Fujishima and Hondn in 1972, titanium dioxide material has attracted extensive attention in its application research in the field of photocatalytic technology. Currently, TiO 2 And their complexes often exist in the form of powder and film, which is not only expensive, but also difficult to recycle. However, porous TiO with rich pore structure and larger specific surface area 2 , in many aspects such as improving mass transfer efficiency, increasing surface active sites, enhancing light absorption, shortening the diffusion distance of photogenerated charges ...

Claims

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Application Information

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IPC IPC(8): B01J21/06C02F1/32B01D53/86B01D53/72C02F101/30
CPCB01D53/007B01D53/8668C02F1/32B01J21/063C02F2101/308B01D2259/804B01J35/60B01J35/39
Inventor 李金龙贾帅强隋国哲杜丽娟
Owner QIQIHAR UNIVERSITY
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