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Preparation method of adsorbent material as well as analytical method

An analysis method and adsorbent technology, applied in the field of analysis, can solve problems such as complex calculation process, complex sampler structure, and cumbersome production

Active Publication Date: 2015-03-25
SHENZHEN INST OF BUILDING RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multi-component polluted gas passive sampler in this patent is to place different adsorbents in a sampler, and each adsorbent collects a gas pollutant; at the same time, different adsorbent materials are placed to make the sampler structure It is more complex, more cumbersome to make, and requires a variety of analysis methods to process different gas samples, and the calculation process is more complicated

Method used

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preparation example Construction

[0028] The embodiment of the invention discloses a preparation method of an adsorbent material, which includes the following steps:

[0029] A) Immerse activated carbon fiber in hydrogen peroxide and rinse;

[0030] B) Immerse the activated carbon fiber obtained in step A) in an alkaline solution, and then rinse, the alkaline solution being potassium hydroxide solution or sodium hydroxide solution;

[0031] C) The activated carbon fiber obtained in step B) is aged under the protection of nitrogen to obtain an adsorption material.

[0032] This application first uses hydrogen peroxide to modify the surface of the activated carbon fiber to increase its adsorption capacity for formaldehyde, and then uses an alkaline solution to modify the activated carbon fiber to improve its NO 2 And SO 2 Adsorption capacity; Finally, nitrogen is used for aging to increase alkalinity and further increase formaldehyde and NO 2 , SO 2 , Benzene and toluene adsorption performance.

[0033] Activated carbon f...

Embodiment 1

[0053] Put the commercially available activated carbon fiber (ACF) into ultrapure water and boil twice for 20 minutes each time; at a temperature of 55°C to 65°C, the ACF is heated to 30wt% 50ml of H 2 O 2 After immersing in medium for 5h, rinse with ultrapure water in small amounts for several times; immerse in 2.5mol / L 50ml KOH solution for 1h at 50℃, rinse with ultrapure water in small amounts until the cleaning solution is neutral, and finally in N 2 Under protection, aging at 300°C for 30 min to obtain adsorbent material.

Embodiment 2

[0055] Put the commercially available activated carbon fiber (ACF) into ultrapure water and boil twice for 20 minutes each time; at a temperature of 25°C, the ACF is added to 0.3wt% 50ml H 2 O 2 After immersing in medium for 1h, rinse with ultrapure water in small amounts for several times; immerse in 2.5mol / L 50ml KOH solution for 10h at 25℃, rinse with ultrapure water in small amounts until the cleaning solution is neutral, and finally in N 2 Under protection, aging at 300°C for 30 min to obtain adsorbent material.

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Abstract

The invention provides a preparation method of an adsorbent material. The preparation method comprises the following steps: A), activated carbon fiber is impregnated in hydrogen peroxide and then washed; B), the activated carbon fiber obtained in the step A) is impregnated in an alkaline solution and washed, and the alkaline solution adopts a potassium hydroxide solution or a sodium hydroxide solution; and C), the activated carbon fiber obtained in the step B) is aged under protection of nitrogen to obtain the adsorbent material. According to the preparation method, hydrogen peroxide and the alkaline solution are adopted sequentially to modify the activated carbon fiber, so that basic groups in the activated carbon fiber are increased, and the adsorbability of the activated carbon fiber for formaldehyde, NO2, SO2, benzene and toluene is reinforced. The invention further provides an analytical method for pollutants in air by using the adsorbent material. With adoption of the analytical method, formaldehyde, NO2, SO2, benzene and toluene in the air can be analyzed simultaneously, and the accuracy is higher.

Description

Technical field [0001] The invention relates to the technical field of analysis methods, in particular to an adsorbent material and an analysis method. Background technique [0002] At present, environmental pollution is becoming more and more serious, and the composition and concentration of harmful substances in the air are becoming more and more serious. With the improvement of people's quality of life, the requirements for indoor air quality in homes and offices are also increasing. [0003] Passive air sampler is an auxiliary instrument for detecting air quality. It is a sampling method for collecting gaseous or vapor pollutants in the air based on the principle of gas molecule diffusion or permeation. It does not have an absorption pump and an air flow metering device. The adsorbent is exposed to the air for a certain period of time (sampling time), so that part of the gaseous pollutants in the air are adsorbed in the adsorbent attached. When the passive air sampler is in us...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30G01N30/96
CPCB01J20/20B01J20/28023B01J20/3204G01N30/96
Inventor 高峣朱珍崔九思曹罡钟伟通
Owner SHENZHEN INST OF BUILDING RES
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