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Method for preparing nano-porous ceramic material having high specific surface area and obtained product and application

A high specific surface area, nanoporous technology, applied in the preparation and application of porous materials, can solve the problems of small heavy metal ion capacity and low specific surface area, and achieve the effect of low preparation cost, high specific surface area, and good industrial application

Inactive Publication Date: 2016-11-30
GUANGDONG PHARMA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the micron-scale pore structure leads to a low specific surface area of ​​the material, and the material has a small capacity to adsorb heavy metal ions.

Method used

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  • Method for preparing nano-porous ceramic material having high specific surface area and obtained product and application
  • Method for preparing nano-porous ceramic material having high specific surface area and obtained product and application
  • Method for preparing nano-porous ceramic material having high specific surface area and obtained product and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation of the nanoporous ceramic material with high specific surface area, the steps are as follows:

[0031] ① Take 35W% of nano-alumina, 50W% of fumed silica, 5W% of binder, and 10W% of pore-forming agent, mix and shape.

[0032] ②Procedural heating to 1200°C for sintering and solidification, removing the pore-forming agent, and cooling down to obtain a nanoporous ceramic material with a high specific surface area. For the pore distribution of nanoporous ceramic materials with high specific surface area, see figure 2 shown.

Embodiment 2

[0034] The preparation method of the nanoporous ceramic material with high specific surface area, the steps are as follows:

[0035] ① Take 20W% nano-alumina, 65W% fumed white carbon black, 4W% binder, 1W% magnesia, and 10W% pore-forming agent, mix and shape.

[0036] ②Procedural heating to 1000°C for sintering and solidification, removal of the pore-forming agent, and cooling to obtain a nanoporous ceramic material with a high specific surface area. The porosity and specific surface area of ​​different magnesium oxide additives are shown in image 3 shown.

Embodiment 3

[0038] The preparation and application process of the nanoporous ceramic material with high specific surface area, the steps are as follows:

[0039] ① Take 20W% aluminum sol, 66W% fumed white carbon black, 3W% binder, 1W% sintering aid, and 10W% pore-forming agent, mix and shape;

[0040] ②Procedurally raise the temperature to 1000°C for sintering and solidification, remove the pore-forming agent, and cool down to obtain a nanoporous ceramic material.

[0041] ③Use 2% hydrogen peroxide and 1% nitric acid at 60°C to pre-treat the nanoporous ceramic material with high specific surface area for 0.5h, and then dry it at 120°C for later use.

[0042] ④The nanoporous ceramic material with high specific surface area obtained in step ③ is modified by ethanol, KH560 and catalyst to obtain a porous ceramic material rich in mercapto groups. The porous ceramic ball modified by mercapto group has the characteristics that the surface and the interior of the ceramic ball are not easily wet...

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PUM

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Abstract

The invention provides a method for preparing a nano-porous ceramic material having a high specific surface area. The method comprises a step (1) of taking 5-50W% of nanometer aluminum oxide, 50-80W% of gas phase white carbon black, 1-10W% of additive and 5-50W% of pore-forming agent to perform uniform mixing, and performing forming; a step (2) of performing warming to 900-1300 DEG C to remove the pore-forming agent, performing sintering and curing, and obtaining the nano-porous ceramic material. The preparation cost is low, the prepared nano-porous ceramic material has the high specific surface area, the mechanical strength is higher, and a better basis is provided for further application of the product.

Description

technical field [0001] The invention relates to the field of preparation and application of porous materials, in particular to a method for preparing porous ceramic materials with a large specific surface area. The invention also relates to porous ceramic materials with a large specific surface area and applications thereof. Background technique [0002] Compared with ordinary materials, porous materials are more and more recognized and developed by people because of their excellent physical and chemical properties such as light weight, relatively small density, and large specific surface area. The porous materials mentioned here are generally divided into macroporous materials, mesoporous materials (with a pore size of 2-50nm) and micro-nanoporous materials according to their pore size distribution. Designing a porous material rich in nanopore structure through a specific process can greatly increase the specific surface area of ​​the material, enable the material to obtain...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B38/06C04B41/80B01J35/10B01J31/22C02F1/28C02F11/00C02F101/20
CPCC02F1/281C02F11/00C04B35/14C04B38/06C04B41/80B01J31/2265C02F2101/20C04B2235/3218C04B2235/3217C04B2235/5454C04B2235/96B01J35/60C04B38/007
Inventor 郭鹏峰蔡鹤欢
Owner GUANGDONG PHARMA UNIV