Evaluation method of oxygen-containing functional group on surface of active carbon

A technology of surface oxygen content and evaluation method, which is applied in the direction of material analysis by observing the effect on chemical indicators, and analysis by chemical reaction of materials.

Inactive Publication Date: 2015-02-18
SHANXI XINHUA CHEM
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Problems solved by technology

[0003] At present, there is no complete set of qualitative and quantitative methods and standardized operating procedures for oxygen-containing functional groups on the surface of activated carbon in China.

Method used

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Embodiment Construction

[0044] Specific embodiments of the present invention will be described in detail below.

[0045] A method for evaluating oxygen-containing functional groups on the surface of activated carbon, comprising the steps of:

[0046] (1) Using the Spectrum100 Fourier transform infrared spectrometer of the American PE company to qualitatively judge the type of oxygen-containing functional groups on the surface of the carbon samples to be tested under different process conditions; among them, the test conditions are as follows:

[0047] The mass ratio of KBr to carbon sample is 200:1;

[0048] The thickness of the sample tablet is 0.8 ~ 1.2mm;

[0049] Scanning range 4000~450cm -1 ;

[0050] Scanning speed 0.20cm / s, scanning time 1min, scanning times 4;

[0051] Ordinate unit T%;

[0052] Resolution 4.0cm -1 .

[0053] Among them, in order to obtain a clearer, more ideal, and better-quality spectrum, baseline correction and smoothing are generally performed on the spectrum.

[...

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Abstract

The invention relates to a performance research method of an active carbon material, and in particular to an evaluation method of an oxygen-containing functional group on a surface of active carbon. The method comprises the following steps: (1) qualitatively judging the type of the oxygen-containing functional groups on the surfaces of to-be-tested carbon samples under different technical conditions by adopting a Fourier transform infrared spectrometer, wherein the testing conditions are as follows: the mass ratio of KBr to the carbon samples is 200:1, the thickness of a product tablet is 0.8mm-1.2mm, the scanning range is 4000cm<-1> to 450cm<-1>, the scanning speed is 0.20cm / s, the scanning time is 1min, the scanning times is 4, the unit of longitudinal coordinates is T% and the resolution ratio is 4.0cm<-1>; judging whether the surfaces of the to-be-tested carbon samples have the oxygen-containing functional groups such as carboxyl, lactone groups and phenolic hydroxyl groups or not according to a spectral peak, if so, executing step (2).

Description

technical field [0001] The invention relates to a performance research method of activated carbon materials, in particular to an evaluation method of oxygen-containing functional groups on the surface of activated carbon. Background technique [0002] Activated carbon has a high specific surface, rich pore structure and easy-to-modulate surface functional groups. Its surface chemical properties have a great influence on the surface reaction, hydrophilicity (repellency), catalytic properties and surface charge of activated carbon. These characteristics It affects the dispersion and activity of the catalyst, the adsorption behavior of the adsorbent, etc. The surface chemical properties of activated carbon are largely determined by the type and quantity of surface functional groups, and the most common functional groups are oxygen-containing functional groups. [0003] At present, there is no complete set of qualitative and quantitative methods and standardized operating proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/79
Inventor 温宇慧张金凤黄英齐嘉豪金彦任宋雯李爱叶邢浩洋范斌杰郭军军赵婷钟海霞朱健娣
Owner SHANXI XINHUA CHEM
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