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Mesoporous titania meterial containing selenium and its prepn process

A technology of mesoporous titanium oxide and inorganic oxides, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as no public reports, and achieve the goal of avoiding waste water and large specific surface area Effect

Inactive Publication Date: 2007-06-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a large number of mesoporous titanium oxides containing the above-mentioned doping elements have been successfully synthesized, there is no public report on the mesoporous titanium oxide doped with selenium.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 2.1g of P123 with 10g of absolute ethanol, stir at room temperature (25°C) for 30 minutes to fully dissolve P123 until clear; add 3.4g (0.01mol) of butyl titanate, and continue stirring for 2 to 3 hours at 25°C; under vigorous stirring, A mixed solution of sodium selenite-water-absolute ethanol (containing Na 2 SeO 3 : 0.0017g, H 2 O: 0.80g, EtOH: 15.37g) were slowly added dropwise to the above solution, pH: 6-7 during the synthesis process. The solution turned from clarification to white turbidity and the amount of precipitation gradually increased. After the addition, continue to stir for 5 hours, evaporate to dryness in a water bath at 80°C, and then place it in an oven at 80°C overnight to fully dry. After grinding, a light yellow powder is obtained. Add 100 mL of anhydrous EtOH to the obtained pale yellow powder, stir at 40°C for 3-4 hours, and centrifuge. Repeat the above operation four times. The obtained solid was dried in a drying oven at 100°C for 24 h...

Embodiment 2

[0025] Mix 1g of P123 with 10g of absolute ethanol, stir at room temperature (25°C) for 30min to fully dissolve P123 until clear; add 3.4g (0.01mol) of butyl titanate, and continue stirring for 2 to 3 hours at 25°C; A mixed solution of sodium selenate-water-absolute ethanol (containing Na 2 SeO 3 : 0.0086g, H 2 O: 0.82g, EtOH: 11.85g) were slowly added dropwise to the above solution, pH: 6-7 during the synthesis process. The solution turned from clarification to white turbidity and the amount of precipitation gradually increased. After the addition, continue to stir for 5 hours, evaporate to dryness in a water bath at 80°C, and then place it in an oven at 80°C overnight to fully dry. After grinding, a light yellow powder is obtained. Add 100 mL of anhydrous EtOH to the obtained pale yellow powder, stir at 40°C for 3-4 hours, and centrifuge. Repeat the above operation four times. The obtained solid was dried in a drying oven at 100°C for 24 hours to obtain the product. The...

Embodiment 3

[0028] Mix 1g of P123 with 10g of absolute ethanol, stir at room temperature (25°C) for 30min to fully dissolve P123 until clear; add 3.4g (0.01mol) of butyl titanate, and continue stirring for 2 to 3 hours at 25°C; A mixed solution of sodium selenate-water-absolute ethanol (containing Na 2 SeO3 : 0.017g, H 2 O: 0.79g, EtOH: 11.85g) were slowly added dropwise to the above solution, pH: 6-7 during the synthesis process. The solution turned from clarification to white turbidity and the amount of precipitation gradually increased. After the addition, continue to stir for 5 hours, evaporate to dryness in a water bath at 80°C, and then place it in an oven at 80°C overnight to fully dry. After grinding, a light yellow powder is obtained. Add 100 mL of anhydrous EtOH to the obtained pale yellow powder, stir at 40°C for 3-4 hours, and centrifuge. Repeat the above operation four times. The obtained solid was dried in a drying oven at 100°C for 24 hours to obtain the product. The Se...

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PUM

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Abstract

The present invention discloses one kind of mesoporous titania material containing selenium and its preparation process. The mesoporous titania material containing selenium as new photocatalytic material is prepared with sodium selenite as the precursor of selenium, butyl titanate as the precursor of titanium and non-ionic surfactant block polymer P123 as template agent, and through the low temperature in-situ one-step reaction in a sol-gel system to implant selenium into mesoporous titania bulk phase and the subsequent ageing and drying of the product. The mesoporous titania material includes inorganic oxide skeleton Ti-O-Ti and Ti-O-Se, and has Se / Ti molar ratio of 0-10 % and characteristic molecular expression of (TiO2)1-x(SeO2)x, where, x is 0-0.1. The preparation process is simple and environment friendly, and the synthesized mesoporous titania material has controllable selenium content, great specific surface area and wide application.

Description

1. Technical field [0001] The invention relates to a new mesoporous titanium oxide material containing selenium and a preparation method thereof. 2. Background technology [0002] Since the advent of all-silicon mesoporous materials, they have aroused great interest of researchers for their regular one-dimensional pore structure, large specific surface area, high thermal stability and hydrothermal stability. Following the successful synthesis of all-silicon mesoporous materials, the synthesis of non-silicon mesoporous materials has become a research hotspot. Among them, mesoporous titanium oxide has stable chemical properties, easy-to-obtain synthetic raw materials, ordered crystal structure, and one-dimensional adjustable Variable channels, high specific surface area and photocatalytic activity have attracted much attention. [0003] The synthesis of mesoporous titanium oxide is to use ionic or non-ionic surfactant as template in sol-gel system, titanium inorganic salt, ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06
Inventor 王英黄丽雪岷王建强朱建华邹志刚陈新益范晓星于涛李朝升祝梅
Owner NANJING UNIV
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