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Magnetic nano-Turnbull's blue and its preparation method and use

A magnetic nano and Teng's blue technology, applied in magnetic liquids, material analysis by electromagnetic means, measurement devices, etc., can solve the problems of prone to side reactions, reduced life, limited monitoring sensitivity, etc., and achieve excellent electrochemical activity, The preparation method is simple and the preparation cycle is short.

Inactive Publication Date: 2013-05-01
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcomings of the electrochemical method are that the electrode selectivity is not high, and side reactions are prone to occur, which reduces the current efficiency; the electrode is easy to form an adsorption layer and an oxide film and is fouled, and the service life is reduced; the monitoring sensitivity is limited; it is difficult to detect pollutants in real time. , online and in situ analysis, etc.
At present, there have been reports at home and abroad using sensing technology to monitor target objects such as arsenic and sulfide, pesticide residues, wastewater quality, biochemical oxygen demand, ammonia nitrogen, phenolic pollutants, and odorous compounds (Ferdinando F , Luigia M, Giovanni PCM, et al. Thermostable esterase from alicyclobacillus acidocaldarius as biosensor for the detection of organophosphate pesticides. Anal. Chem., 2011, 83 (5): 1530–1536), but they are all at a very weak initial stage, Especially facing problems such as poor response stability, short service life, and high cost

Method used

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  • Magnetic nano-Turnbull's blue and its preparation method and use
  • Magnetic nano-Turnbull's blue and its preparation method and use
  • Magnetic nano-Turnbull's blue and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 10 mL of double distilled water, add sufficient potassium hexacyanoferrate, and ultrasonically disperse for 2 minutes to obtain a saturated potassium hexacyanoferrate solution.

[0042] Take 30mL of acetone in a 250mL round bottom flask, add 4mL [bmim]FeCl 4 , Under magnetic stirring, add the saturated potassium hexacyanoferrate solution dropwise until the solution turns dark green, continue to stir for 2h, stand for 28h, separate the clear liquid, transfer the lower layer mixture into the centrifuge tube and centrifuge for 10min at 8000r / min , Pour out the upper layer of liquid, ultrasonically wash the synthetic material with acetone and secondary water, until the supernatant is colorless. Dry at room temperature (25°C) for 12h, transfer it to a test tube and vacuum dry at 130°C for 4h, take it out and place it in a desiccator for storage.

[0043] Use Al for glassy carbon electrode with a diameter of 2mm 2 O 3 After polishing, ultrasonic cleaning was performed with ac...

Embodiment 2

[0045] Take 15 mL of twice distilled water, add sufficient potassium hexacyanoferrate, and ultrasonically disperse for 4 minutes to obtain a saturated potassium hexacyanoferrate solution.

[0046] Take 20mL of acetone in a 250mL round bottom flask, add 3mL [bmim]FeCl 4 , Under magnetic stirring, add the saturated potassium hexacyanoferrate solution dropwise until the solution turns dark green, continue to stir for 2h, stand for 24h, separate the clear liquid, transfer the lower mixture to a centrifuge tube and centrifuge at 6000r / min for 15min, pour Take out the upper layer of liquid, and ultrasonically wash the synthetic substance with acetone and secondary water until the supernatant is colorless. Dry at room temperature (20°C) for 24h, transfer it to a test tube and vacuum dry at 120°C for 5h, take it out and place it in a desiccator for storage.

[0047] Use Al for 3mm diameter glassy carbon electrode 2 O 3 After polishing, ultrasonic cleaning was performed with acetone, ethano...

Embodiment 3

[0049] Take 20 mL of twice distilled water, add sufficient potassium hexacyanoferrate, and ultrasonically disperse for 5 minutes to obtain a saturated potassium hexacyanoferrate solution.

[0050] Take 40mL acetone into a 500mL round bottom flask, add 5mL [bmim]FeCl 4 , Under magnetic stirring, add the saturated potassium hexacyanoferrate solution dropwise until the solution turns dark green, continue to stir for 3h, stand for 36h, separate the clear liquid, transfer the lower layer mixture into a centrifuge tube and centrifuge at 10000r / min for 8min, pour Take out the upper layer of liquid, and ultrasonically wash the synthetic substance with acetone and secondary water until the supernatant is colorless. Dry at room temperature (23°C) for 14h, transfer it to a test tube at 140°C and vacuum dry for 3.5h, take it out and place it in a desiccator for storage.

[0051] Use Al for 4mm diameter glassy carbon electrode 2 O 3 After polishing, ultrasonic cleaning was performed with aceton...

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Abstract

The invention belongs to the technical field of Turnbull's blue synthesis and nano-materials and relates to a magnetic nano-Turnbull's blue and its preparation method and use. The preparation method of the magnetic nano-Turnbull's blue comprises that an iron imidazole magnetic ion-containing liquid and a potassium ferricyanide aqueous solution undergo a reaction in a solvent with magnetic stirring; and reaction products are separated and purified so that the magnetic nano-Turnbull's blue is obtained. The preparation method has simple processes and strong controllability, is suitable for large-scale production and has good application prospects.

Description

Technical field [0001] The invention belongs to the technical field of Ten's blue synthesis and nano materials, and particularly relates to a magnetic nano Ten's blue and a preparation method and application thereof. Background technique [0002] With the development of the world economy, environmental protection, food safety and other issues have become an important part of the national economy and people’s livelihood. Reasonable and effective monitoring technology can timely, accurately and comprehensively reflect the current situation and changing trends of environmental quality and food safety. The key and restrictive factors of control and governance. [0003] Traditional methods such as GC, GC-FTIR, GC-MS, HPLC, LC-MS-MS, ICP-MS, GC-atomic fluorescence, atomic absorption, microwave plasma, etc. (Lee C, Yoon J, Von GU, et al . Oxidative degradation of nitrosodimethyl amine by conventional ozonation and the advanced oxidation process ozone / hydrogenperoxide. Water Research, 200...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C3/14G01N27/30G01N27/416H01F1/44
Inventor 屈建莹康世平屈建航娄同芳杜学萍朱专赢
Owner HENAN UNIVERSITY
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