Preparation method of cobalt sulfide nanomaterial and method for detecting hydrogen peroxide with cobalt sulfide nanomaterial

A technology of nanomaterials and hydrogen peroxide, which is applied in the direction of cobalt sulfide, chemical instruments and methods, and analysis by making materials undergo chemical reactions, can solve the problems of low detection limit, high detection limit, easy inactivation, etc., and achieve detection The effect of fast speed, high accuracy and good sensitivity

Inactive Publication Date: 2016-06-22
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] In the method of colorimetric analysis to detect hydrogen peroxide, the earliest catalyst used is hydrogen peroxide bioenzyme (HRP), which has good catalytic performance, high sensitivity and strong specificity. Extremely high and easily deactivated, coupled with high price, thus limiting its further application
In 2007, Gao et al. found that Fe 3 o 4 Magnetic nanomaterials have catalase activity, but Fe 3 o 4 Need to react at 40°C for 10-30min to get the result, and the detection limit is high
Although Co 3 o 4 Nanoflower, WS 2 Nanosheets and FeHPO 4 The stability and specificity o...

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  • Preparation method of cobalt sulfide nanomaterial and method for detecting hydrogen peroxide with cobalt sulfide nanomaterial
  • Preparation method of cobalt sulfide nanomaterial and method for detecting hydrogen peroxide with cobalt sulfide nanomaterial
  • Preparation method of cobalt sulfide nanomaterial and method for detecting hydrogen peroxide with cobalt sulfide nanomaterial

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[0022] Such as figure 1 As shown, add 12-18 ml of o-dichlorobenzene, 0.1-0.2 ml of oleic acid, and 0.1-0.3 g of trioctylphosphine oxide in the closed reaction bottle, and then pass through the argon to exhaust the air in the device, and then slowly raise the temperature To 187°C, quickly add 2-5mL o-dichlorobenzene solution containing 0.4-0.6 g of cobalt carbonyl to the reaction bottle with a pipette gun. The molecular formula of cobalt carbonyl is Co 2 (CO) 8 , maintaining the reaction temperature at 182° C. for 30 minutes to obtain a nano-cobalt colloidal solution. Then add 2-5mL o-dichlorobenzene solution containing a certain amount of sulfur into the nano-cobalt colloid solution, the amount of sulfur added here is based on the amount of cobalt carbonyl added, so that the molar ratio of cobalt to sulfur is 3:4, After continuing to react for 2.5 hours, a nanoparticle cobalt sulfide dispersion solution was obtained. After the reaction solution is cooled to room temperature...

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Abstract

The invention relates to the field of food detection, in particular to a preparation method of a cobalt sulfide nanomaterial and a method for detecting hydrogen peroxide with the cobalt sulfide nanomaterial. O-dichlorobenzene, oleic acid and trioctyl phosphine oxide react with an o-dichlorobenzene solution containing carbonyl cobalt, then reaction products react with an o-dichlorobenzene solution containing sulfur, the reaction products are sequentially washed and centrifuged with methanol and distilled water repeatedly, and cobalt sulfide nanomaterial powder is obtained. According to the method for detecting hydrogen peroxide with the cobalt sulfide nanomaterial, to be specific, a phosphate buffer solution of cobalt sulfide is added to a Tirs-Hcl buffer solution, then a to-be-detected solution and a TMB color developing agent are added, and whether the to-be-detected solution contains hydrogen peroxide or not is judged through observation of color reaction. The method is high in detection speed and accuracy and has better specificity to detection of hydrogen peroxide.

Description

technical field [0001] The invention relates to the field of food detection, in particular to a method for preparing a cobalt sulfide nanometer material and detecting hydrogen peroxide. Background technique [0002] At present, the detection methods of hydrogen peroxide in food include titration analysis method (Huang Weikun. Food Inspection and Analysis [M]. Beijing: China Light Industry Press, 1989.171), high performance liquid chromatography-ultraviolet detection method (Chen Yihui, Liu Yan, Zhou Jianli , Zhu Haiwei, Xiang Lixia. Determination of hydrogen peroxide in food by high performance liquid chromatography-ultraviolet detection. Spectroscopic Laboratory Journal. 2009.26), spectrophotometry (Fan Huafeng, Zhang Zhongyi, Liu Zhenlin. Spectrophotometry for the determination of hydrogen peroxide in food [J]. Chinese Journal of Health Inspection. 2006.16), fluorescence method (Zhang Dexin, Cheng Luping, Yao Qunfeng. Fluorescence determination of residual hydrogen peroxid...

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Application Information

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IPC IPC(8): C01G51/00G01N21/78
CPCC01G51/30C01P2002/72C01P2002/84C01P2002/85C01P2004/04C01P2004/64C01P2006/22G01N21/78
Inventor 张冰吕佳韩兵李慧高文超李兴常宏宏魏文珑
Owner TAIYUAN UNIV OF TECH
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