Cysteine modified SBA-15 mesoporous material and preparation method thereof

A technology of NH2-SBA-15 and cysteine, applied in chemical instruments and methods, silicate, aluminum silicate, etc., can solve secondary pollution and other problems, achieve strong adsorption capacity and good environmental compatibility , highly controllable effect

Active Publication Date: 2013-10-02
江苏先进无机材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, most of the existing modified materials with high adsorption capacity for Hg(II) are modified by organic mercaptan / ether, phosphine groups, etc., which inevitably have certain toxicity, and may lead to Secondary pollution

Method used

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  • Cysteine modified SBA-15 mesoporous material and preparation method thereof
  • Cysteine modified SBA-15 mesoporous material and preparation method thereof
  • Cysteine modified SBA-15 mesoporous material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Weigh 4.0g of triblock copolymer surfactant P123 and dissolve it in 120mL of 2mol / L hydrochloric acid and 30mL of deionized water. Place the mixed solution in a 38℃ water bath and stir until the solution is clear. Then slowly add TEOS and continue. Stir for 10 minutes and then stand for 24 hours. Hydrothermal treatment at 100°C for 24 hours. After cooling, it was repeatedly filtered and washed with deionized water. After drying treatment at 100°C, the powder was placed in a muffle furnace and slowly heated to 550°C for 5 hours to remove surfactants. Obtain white mesoporous material SBA-15;

[0054] Activate the obtained SBA-15 in boiling water for 3 hours, filter, and dry; dissolve 2.2 g of the above product and 5 mL of APTES in 250 mL of dry toluene, reflux for 20 hours at 110°C under a nitrogen atmosphere, and repeatedly filter with dry toluene and absolute ethanol Wash the powder; finally weigh the above dry powder 3.9g, cysteine ​​2.0g, DCC: 3.4g, DMAP: 2.0g, using 25...

Embodiment 2

[0056] Weigh 4.0g of triblock copolymer surfactant P123 and dissolve it in 120mL of 2mol / L hydrochloric acid and 30mL of deionized water. Place the mixed solution in a 38℃ water bath and stir until the solution is clear. Then slowly add TEOS and continue. Stir for 24 hours. Hydrothermal treatment at 100°C for 24 hours. After cooling, it was repeatedly filtered and washed with deionized water. After drying treatment at 100°C, the powder was placed in a muffle furnace and slowly heated to 550°C for 5 hours to remove surfactants. Obtain white mesoporous material SBA-15;

[0057] Activate the obtained SBA-15 in boiling water for 3 hours, filter, and dry; dissolve 1 g of the above product and 5 mL APTES in 100 mL of dry toluene, reflux for 20 hours at 110°C under a nitrogen atmosphere, and repeatedly filter and wash with dry toluene to obtain a powder; Finally, weigh 2.0g of the above powder, 1.0g of cysteine, 2.02g of DCC, 0.12g of DMAP, 200mL of dry DMF (dimethylformamide) as a sol...

Embodiment 3

[0059] Weigh 4.0g of triblock copolymer surfactant P123 and dissolve it in 120mL of 2mol / L hydrochloric acid and 30mL of deionized water. Place the mixed solution in a 38℃ water bath and stir until the solution is clear. Then slowly add TEOS and stir. 24 hours. Hydrothermal treatment at 100°C for 24 hours. After cooling, it was repeatedly filtered and washed with deionized water. After drying treatment at 100°C, the powder was placed in a muffle furnace and slowly heated to 550°C for 5 hours to remove surfactants. Obtain white mesoporous material SBA-15;

[0060] Activate the obtained SBA-15 in boiling water for 3 hours, filter, and dry; dissolve 1.5 g of the above product and 8 mL APTES in 150 mL dry toluene, reflux for 20 hours at 110°C under a nitrogen atmosphere, and repeatedly filter and wash with dry toluene to obtain a powder ; Finally, weigh the above powder 1.6g, cysteine ​​0.8g, DCC: 0.8g, DMAP: 0.015g, with 160mL dry DMF (dimethylformamide) as the solvent, reflux at 1...

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Abstract

The invention relates to a cysteine modified SBA-15 mesoporous material and a preparation method thereof. Hydrogen of hydroxy on the surface of SBA-15 is functionalized by a group which is shown in the specification of the invention, and therefore the cysteine modified SBA-15 mesoporous material is obtained. According to the invention, since cysteine is introduced to a sulfydryl functional group, Hg(II) can be absorbed efficiently and quickly with high selectivity.

Description

Technical field [0001] The invention belongs to the field of chemical modification of mesoporous materials, and relates to a new type of mesoporous material with high-efficiency, rapid and highly selective adsorption of Hg(II), and specifically relates to a cysteine ​​modified SBA -15 mesoporous material and its preparation method. Background technique [0002] In recent years, environmental pollution has become increasingly severe, and the discharge of heavy metal ions has caused serious harm to humans and other organisms. Among them, Hg 2+ (Hg(Ⅱ)) is particularly harmful to the environment, and belongs to highly toxic heavy metals that can be accumulated in human and animal tissues. Inorganic mercury in polluted water can be transformed into more toxic organic mercury under the action of microorganisms. In addition to causing serious harm to the nervous system, organic mercury can also cause various types of genetic mutations. Hg(Ⅱ) is highly volatile, toxic, and bioaccumulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/30
Inventor 汪正李青方冬梅朱燕屈海云邹慧君陈奕睿
Owner 江苏先进无机材料研究院
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