Electrodeposition preparation method of carbon nanotube/transition metal compound composite material

A technology of carbon nanotubes and transition metals, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the limitations of practical applications, catalyst performance is not ideal, catalyst particles are small and easy to agglomerate, etc. problems, to achieve the effects of easy mass production, improved application value, and high current density

Active Publication Date: 2016-01-20
WENZHOU UNIVERSITY
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Problems solved by technology

For example, molybdenum sulfide, although it has some potential catalytic value, its poor bulk conductivity and extremely low micron-scale activity limit its practical application in catalysis.
In recent years, some researchers have used methods such as chemical vapor deposition, hydrothermal or solvothermal, and chemical exfoliation to obtain catalysts for hydrogen evolution with better performance. However, these methods have harsh high

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  • Electrodeposition preparation method of carbon nanotube/transition metal compound composite material
  • Electrodeposition preparation method of carbon nanotube/transition metal compound composite material
  • Electrodeposition preparation method of carbon nanotube/transition metal compound composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1: prepare carbon nanotube / molybdenum sulfide composite material (MoS 4 / CNTs)

[0048] (1) Electrode pretreatment: take a glassy carbon electrode (Shanghai Chenhua, CHI104, 3mm in diameter), and perform polishing, water washing, and 20KHz ultrasonic pretreatment for 60s in sequence;

[0049] (2) Preparation of carbon nanotube-modified glassy carbon electrodes: Add arrayed carbon nanotubes (1mg) to a mixture (1mL) of ethanol and water with a volume ratio of 1:1, and form a suspension by ultrasonication at 40KHz for 2h. The suspension is added dropwise on the surface of the glassy carbon electrode pretreated in step (1), and dried naturally to form a uniform thin layer of carbon nanotubes (the thin layer is about 40 μg of carbon nanotubes), to obtain carbon nanotube-modified Glassy carbon electrode;

[0050] (3) Preparation of electroplating solution: Add precursor ammonium tetrathiomolybdate (0.104g), ammonium molybdate (0.392g), supporting electrolyte sodi...

Embodiment 2

[0054] Embodiment 2: prepare carbon nanotube / molybdenum sulfide composite material (MoS 3 / CNTs)

[0055] (1) Electrode pretreatment: take a glassy carbon electrode (Shanghai Chenhua, CHI104, 3mm in diameter), and perform polishing, water washing, and 20KHz ultrasonic pretreatment for 60s in sequence;

[0056] (2) Preparation of carbon nanotube-modified glassy carbon electrodes: Add arrayed carbon nanotubes (1mg) to a mixture (1mL) of ethanol and water with a volume ratio of 1:1, and form a suspension by ultrasonication at 40KHz for 2h. The suspension is added dropwise on the surface of the glassy carbon electrode pretreated in step (1), and dried naturally to form a uniform thin layer of carbon nanotubes (the thin layer is about 40 μg of carbon nanotubes), to obtain carbon nanotube-modified Glassy carbon electrode;

[0057] (3) Preparation of electroplating solution: Add precursor ammonium tetrathiomolybdate (0.5g), ammonium molybdate (0.392g), supporting electrolyte sodium...

Embodiment 3

[0060] Embodiment 3: prepare carbon nanotube / molybdenum selenide composite material (MoSe 2 / CNTs)

[0061] (1) Electrode pretreatment: take a glassy carbon electrode (Shanghai Chenhua, CHI104, 3mm in diameter), and perform polishing, water washing, and 20KHz ultrasonic pretreatment for 60s in sequence;

[0062] (2) Preparation of carbon nanotube-modified glassy carbon electrodes: Add single-walled carbon nanotubes (1mg) to ethanol (1mL), form a suspension at 40KHz for 2h, and add the suspension dropwise to the step ( 1) The surface of the pretreated glassy carbon electrode is naturally dried to form a uniform thin layer of carbon nanotubes (the thin layer is about 40 μg of carbon nanotubes), to obtain a carbon nanotube-modified glassy carbon electrode;

[0063] (3) Preparation of electroplating solution: Add precursor ammonium molybdate (3.9g), selenium oxide (2.2g), supporting electrolyte sodium perchlorate (1.2g), sodium citrate (0.7g) in deionized water (250mL) ), adjust...

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Abstract

The invention provides an electrodeposition preparation method of a carbon nanotube/transition metal compound composite material. The method comprises the following steps: adding carbon nanotubes into a solvent, carrying out ultrasonic treatment to obtain a suspension, adding the suspension to a preprocessed glassy carbon electrode surface in a dropwise manner, and naturally air-drying to form a uniform carbon nanotube thin layer in order to obtain a carbon nanotube modified glassy carbon electrode; adding a precursor A and a support electrolyte into deionized water, adding a precursor B when necessary, and adjusting the pH value to 0-13 by boric acid and/or sodium hypophosphite to obtain an electroplating solution; and electroplating the carbon nanotube modified glassy carbon electrode in the electroplating solution, cleaning with water, naturally drying at normal temperature, and scrapping a carbon nanotube/transition metal compound composite material off the surface of the glassy carbon electrode by using a blade to obtain the carbon nanotube/transition metal compound composite material. The method has the advantages of simple operation and easy large scale production; and the prepared composite material has great advantages in catalytic hydrogen evolution and energy conversion, and can be applied in the fields of production of hydrogen through photocatalytic water decomposition, and photoelectric conversion.

Description

(1) Technical field [0001] The invention belongs to the field of nanocomposite materials research, in particular to an electrodeposition preparation method of a carbon nanotube / transition metal compound composite material with controllable particle size, and the carbon nanotube / transition metal compound composite material is M2Yx / CNTs or M1- M2Yx / CNTs, wherein, M1=Fe, Co, Ni, Cu or Zn, M2=Mo, W or a mixture of the two in any proportion, Y=S, Se or a mixture of the two in any proportion, x=2, 3 or 4. (2) Background technology [0002] The energy crisis and the environmentally harmful gases produced by fossil fuels force us to seek clean and renewable energy to replace traditional fuels, and hydrogen energy will surely become an ideal energy carrier. Electricity is produced at a high rate without any polluting exhaust, and water is the only reaction product. However, although hydrogen is one of the most abundant elements on earth, molecular hydrogen only exists in trace amou...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J27/057B01J27/047B01J37/34C25D9/04
Inventor 杨植李萍聂华贵沈娟霞黄少铭顾灿灿
Owner WENZHOU UNIVERSITY
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