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Bar-shaped ordered mesopore silicon dioxide nano material and preparation method thereof

A technology of mesoporous silica and nanomaterials, applied in the direction of silica, silicon oxide, chemical instruments and methods, etc., can solve the problem of low yield, achieve simple process, suitable for large-scale production, and broad application prospects Effect

Inactive Publication Date: 2009-08-26
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, Linda F.Nazar reported the synthesis of SBA-15 nanorods (500×100nm) using a dilute solution method. Scale-controlled rod-like ordered mesoporous silica nanomaterials have not been reported

Method used

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  • Bar-shaped ordered mesopore silicon dioxide nano material and preparation method thereof
  • Bar-shaped ordered mesopore silicon dioxide nano material and preparation method thereof
  • Bar-shaped ordered mesopore silicon dioxide nano material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] First 2gZnCl 2 Add 200mL of 2mol / L hydrochloric acid solution, stir at 35°C to dissolve completely, and then add 2.5g of P123 to the system. After stirring at constant temperature for 3 hours, 5.6 mLTEOS was added dropwise, and stirring was continued for 24 hours, then centrifuged and washed. Finally, it was refluxed for 6 hours in 300 mL of ethanol solution of hydrochloric acid (0.5% by volume), centrifuged and dried. The obtained rod-shaped ordered mesoporous silica nanomaterials have good dispersion and a pore volume of 0.6 cm 3 g -1 , BET specific surface area is 648m 2 g -1 , with an average pore size of 4.5nm, a diameter of 300nm, and a length of 800nm.

Embodiment 2

[0034] First add 0.3gZnCl 2 Add 100mL of 2mol / L hydrochloric acid solution, stir at 35°C to dissolve completely, and then add 2.5g of P123 to the system. After stirring at constant temperature for 3 hours, 5.6 mLTEOS was added dropwise, and stirring was continued for 24 hours, then centrifuged and washed. Finally, it was calcined at 550° C. for 6 hours. The obtained rod-shaped ordered mesoporous silica nanomaterials have good dispersion and a pore volume of 0.8 cm 3 g -1 , BET specific surface area is 750m 2 g -1 , the average pore size is 5.3nm, the diameter is 180nm, and the length is 1200nm.

Embodiment 3

[0036] First, 4gFe(NO 3 ) 3 9H 2 O was added to 200mL of 2mol / L nitric acid solution, stirred at 38°C to dissolve completely, and then 3g of F127 was added to the system. After stirring at constant temperature for 6 hours, 5.6 mL of methyl orthosilicate (TMOS) was added dropwise, and stirring was continued for 24 hours, then centrifuged and washed. Finally, it was refluxed for 6 hours in 300 mL of ethanol solution of nitric acid (0.5% by volume), centrifuged and dried. The obtained rod-shaped ordered mesoporous silica nanomaterials have good dispersion and a pore volume of 0.8 cm 3 g -1 , BET specific surface area is 790m 2 g -1 , with an average pore size of 6.0nm, a diameter of 300nm, and a length of 1000nm.

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Abstract

The invention relates to a bar-shaped ordered mesopore silicon dioxide nano material and a preparation method thereof, belonging to the technical field of inorganic porous nano material. The bar-shaped ordered mesopore silicon dioxide nano material prepared by a method of chemical surface active agent has the bar length of 100-2000nm, the bar diameter of 60-800nm, the pore diameter of 3-30nm, the pore volume of being larger than 0.6cmg and the specific surface of being more than 600mg. The invention has large controllable pore diameter, controllable bar length and bar diameter with in nano scale and simple technique, so as to be suitable for mass production and used for carrying DNA molecule, antineoplastic molecule, biological enzyme molecule, organic fluorescence molecule, quantum dot, nano crystalloid, etc.

Description

technical field [0001] The invention relates to a rod-shaped ordered mesoporous silicon dioxide nanometer material and a preparation method thereof, belonging to the technical field of inorganic porous nanometer materials. Background technique [0002] Since Mobil first synthesized mesoporous molecular sieves using long-chain alkyl ammonium halide salts as structure-directing agents in 1992, mesoporous materials have been used in industrial catalysis, environmental protection, optics, electromagnetics, microreactors, sensors, biomedicine and other fields. aroused great attention. A large number of ordered mesoporous silica nanomaterials with various morphologies have been synthesized by using CTAB plasma surfactant as the structure-directing agent and taking the alkaline route. [0003] CN1618735A discloses the use of cationic long-chain quaternary ammonium halide salts as structure-directing agents, tri-block polyether non-ionic surface active as co-structure-directing age...

Claims

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Application Information

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IPC IPC(8): C01B33/18C01B37/00C01B39/00
Inventor 何前军施剑林郭利民崔方明
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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