Method for preparing efficient, environment-friendly and functional meso-porous silicon ball

A mesoporous silicon sphere, functional technology, applied in chemical instruments and methods, water/sludge/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems that chromium sludge cannot be treated, the process and process are complicated, and it is difficult to realize industrialization, etc. problem, to achieve the effect of excellent adsorption effect, simple synthesis steps, and easy industrial production

Active Publication Date: 2013-06-19
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to avoid the deficiencies of the prior art, and solve the problems of complex technology and process, inability to handle chromium sludge, high processing cost, poor and unstable adsorption effect, difficulty in realizing adsorption under acidic conditions, recycling of adsorption materials and recovery of chromium resources Utilization, difficult to achieve industrialization and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) At room temperature, add 4 g of stearic acid into 100 g of distilled water, then add 40 mL of tetraethyl orthosilicate and 0.20 mol / L silane coupling agent and stir evenly, then stir at a certain temperature until the solution is milky white, the above solution The pH value in the medium is controlled between 9-10, continue to stir for 6 hours and stand still for 3 hours, and finally filter the solution with suction, and dry the filter cake at 120°C to obtain a functional mesoporous silicon sphere precursor;

[0027] (2) At room temperature, weigh 2 g of the precursor of mesoporous silicon spheres capable of adsorbing chromium ions and add them to a Soxhlet extractor, use 50 g of ethanol as a solution, and extract the template agent in the mesoporous silicon spheres at 100°C for 48 hours. Then the solution was suction-filtered, and the filter cake was obtained at 120° C. to obtain a white powder, and a functional mesoporous silicon sphere powder A was obtained, and t...

Embodiment 2

[0031] (1) At room temperature, add 4g of stearic acid into 100g of distilled water, then add 40mL of tetraethyl orthosilicate and 0.2mol / L silane coupling agent and stir evenly, then stir at a certain temperature until the solution is milky white, the above solution The pH value of the medium is controlled between 9-10, continue to stir for 12 hours and stand still for 3 hours, and finally filter the solution with suction, and dry the filter cake at 120°C to obtain a functional mesoporous silicon sphere precursor;

[0032] (2) At room temperature, weigh the precursor of mesoporous silicon spheres capable of adsorbing chromium ions and add them to a Soxhlet extractor, use 50 g of ethanol as a solution, and extract the template agent in the mesoporous silicon spheres at 100°C for 48 hours. Then the solution was suction-filtered, and the filter cake was obtained at 120° C. to obtain a white powder, and a functional mesoporous silicon sphere powder B was obtained.

[0033] (3) Ad...

Embodiment 3

[0036] (1) At room temperature, add 4g of stearic acid into 100g of distilled water, then add 40mL of tetraethyl orthosilicate and 0.2mol / L silane coupling agent and stir evenly, then stir at a certain temperature until the solution is milky white, the above solution The pH value of the medium is controlled between 9-10, continue to stir for 6 hours and stand still for 6 hours, and finally filter the solution with suction, and dry the filter cake at 120°C to obtain a functional mesoporous silicon sphere precursor;

[0037] (2) At room temperature, weigh the precursor of mesoporous silicon spheres capable of adsorbing chromium ions and add them to a Soxhlet extractor, use 50 g of ethanol as a solution, and extract the template agent in the mesoporous silicon spheres at 100°C for 48 hours. Then the solution was suction-filtered, and the filter cake was obtained at 120° C. to obtain a white powder, and a functional mesoporous silicon sphere powder C was obtained.

[0038] (3) Add...

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Abstract

The invention relates to a method for preparing an efficient, environment-friendly and functional meso-porous silicon ball. The method is characterized by comprising the steps of stirring a silane coupling agent and fatty acid, which serve as double templates, and tetraethoxysilane which serves as a silicon source, at certain temperature; and extracting the templates by using a Soxhlet extractor, and drying to obtain a meso-porous silicon ball with chromium ion adsorption functionality, wherein the grain size is about 300 nm. By introducing the coupling agent, the meso-porous silicon ball has the functionality, roasting is not required for extraction of the templates, the templates can be recycled, production cost is reduced, pollution caused by burn-off of the templates is reduced, the meso-porous silicon ball is in accordance with a green chemical standard, and is simple in preparation process, high in product purity and uniform in grain size, and large-scale industrial production is easily realized. The prepared meso-porous silicon ball is quite good in chromium ion adsorption effect particularly under the acidic condition, and requirements on treatment of acidic industrial waste chromium water are met. Meanwhile, the meso-porous silicon ball can be cyclically utilized, and an adsorption effect is not obviously weakened.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic materials, and relates to a preparation method of functional mesoporous silicon spheres, in particular to a preparation method of highly efficient and environment-friendly functional mesoporous silicon spheres. Background technique [0002] In industrial production, there is a large amount of chromium-containing wastewater that requires harmless treatment. With the development of industries such as electroplating and leather, the discharge of chromium-containing wastewater has gradually increased, causing adverse effects on the ecological environment. The traditional chemical treatment methods of electroplating chromium-containing waste liquid (mainly iron oxide method, sulfurous acid reduction method, chemical precipitation method, etc.), ion exchange method and biological method are used. [0003] The current treatment methods for chromium waste liquid are not only not effective enough, b...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 李伟朱振
Owner NANKAI UNIV
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