Preparation method of flaky semimetal MoTe2: Cu and flaky semimetal MoTe2: Cu/RGO

A semi-metallic and sheet-like technology, applied in the field of electrocatalysts, can solve problems such as complex processes, and achieve the effects of simple processes, low energy consumption, and low equipment costs

Active Publication Date: 2019-12-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the semiconductor and semi-metal structures are relatively stable, and both the semi-metal structure and the metal structure have excellent photoelectric properties, especially high electrical conductivity; in order to meet the high electrocatalytic hydrogen production performance and long-term stability, the semi-metal structure is currently selected MoTe 2 , while in order to enhance the half-metal MoTe 2 The electrical conductivity and hydrogen evolution catalytic performance are usually found in the synthesized MoTe 2 Medium-doped metal ions, the current monolayer semi-metallic MoTe doped with metal ions 2 Generally, it is necessary to first synthesize the bulk semiconductor structure MoTe doped with metal ions 2 , and then apply a variety of complex chemical and physical layering methods to layer into a sheet-like semi-metal, and its process is complex

Method used

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  • Preparation method of flaky semimetal MoTe2: Cu and flaky semimetal MoTe2: Cu/RGO
  • Preparation method of flaky semimetal MoTe2: Cu and flaky semimetal MoTe2: Cu/RGO
  • Preparation method of flaky semimetal MoTe2: Cu and flaky semimetal MoTe2: Cu/RGO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A flake semi-metallic MoTe 2 : Cu and flake semimetal MoTe 2 The preparation method of: Cu / RGO comprises the following steps:

[0029] Step 1: Add 0.004 mol of tellurium powder and 0.008 mol of potassium borohydride into 10 ml of deionized water in a sealed environment and react for 48 hours until complete reaction to obtain Te 2- Te at a concentration of 0.4mol / L 2- Precursor aqueous solution;

[0030] Step 2: Take 0.002 / 7×0.965mol of ammonium paramolybdate and 0.00001mol of copper acetate and dissolve them in 10ml of deionized water, then add 0.005mol of citric acid to obtain a molybdenum ion source precursor solution;

[0031] Step 3: Put Te 2- Precursor aqueous solution and molybdenum ion source precursor solution were placed in the reaction kettle at room temperature for 12 hours, then heated up at a heating rate of 10°C / min to 50°C for 4h, heated to 100°C for 4h, and then heated to 160°C. Thermally reacted for 16 hours, cooled to room temperature, filtered an...

Embodiment 2

[0033] A flake semi-metallic MoTe 2 : Cu and flake semimetal MoTe 2 The preparation method of: Cu / RGO comprises the following steps:

[0034] Step 1: Add 0.004 mol of tellurium powder and 0.008 mol of potassium borohydride into 10 ml of deionized water in a sealed environment and react for 48 hours until complete reaction to obtain Te 2- Te at a concentration of 0.4mol / L 2- Precursor aqueous solution;

[0035] Step 2: Take 0.002 / 7×0.965mol of ammonium paramolybdate and 0.00001mol of copper acetate and dissolve them in 10ml of graphene oxide aqueous solution, then add 0.005mol of citric acid to obtain the molybdenum ion source precursor solution; wherein the graphene oxide aqueous solution The concentration is 1mg / ml;

[0036] Step 3: Put Te 2- Precursor aqueous solution and molybdenum ion source precursor solution were placed in the reaction kettle at room temperature for 12 hours, then heated up at a heating rate of 10°C / min to 50°C for 4h, heated to 100°C for 4h, and th...

Embodiment 3

[0039] A flake semi-metallic MoTe 2 : Cu and flake semimetal MoTe 2 The preparation method of: Cu / RGO comprises the following steps:

[0040] Step 1: Add 0.002 mol of tellurium powder and 0.004 mol of potassium borohydride into 10 ml of deionized water in a sealed environment and react for 48 hours until complete reaction to obtain Te 2- Te at a concentration of 0.2mol / L 2- Precursor aqueous solution;

[0041] Step 2: Take 0.001 / 7×0.965mol of ammonium paramolybdate and 0.000005mol of copper acetate and dissolve them in 10ml of deionized water, then add 0.0025mol of citric acid to obtain a molybdenum ion source precursor solution;

[0042] Step 3: Put Te 2- Precursor aqueous solution and molybdenum ion source precursor solution were placed in the reaction kettle at room temperature for 11 hours, then heated up to 50°C at a heating rate of 20°C / min for 5h, heated to 100°C for 3h, and then heated to 160°C. Thermally reacted for 16 hours, cooled to room temperature, filtered ...

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Abstract

The invention discloses a preparation method of flaky semimetal MoTe2: Cu and flaky semimetal MoTe2: Cu / RGO. The preparation method comprises the following steps: adding tellurium powder and potassiumborohydride into deionized water, and carrying out a reaction in a sealed environment to obtain an aqueous Te2-precursor solution; adding ammonium paramolybdate and copper acetate into 10 ml of a solvent, carrying out dissolving, and adding citric acid to obtain a molybdenum ion source precursor solution; putting the aqueous Te2-precursor solution and the molybdenum ion source precursor solutioninto a reaction kettle, keeping the reaction kettle at room temperature, and then performing gradient heating to 155-165 DEG C for a hydrothermal reaction; and carrying out cooling to room temperature, performing filtering, cleaning a filtrate, and drying the filtrate to obtain Cu ion-doped flaky semimetal molybdenum ditelluride and a compound of the Cu ion-doped flaky semimetal molybdenum ditelluride and graphene. The preparation method can be directly used for preparation of metal molybdenum ditelluride of a semi-metal structure, and is simple in preparation process.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, and relates to a sheet-like semimetal MoTe 2 : Cu and flake semimetal MoTe 2 : Preparation method of Cu / RGO. Background technique [0002] Hydrogen is a kind of clean energy, which has been widely concerned at present. Electrocatalysis of water is currently one of the most efficient methods for producing hydrogen. MoTe 2 It is an ideal electrocatalyst due to its excellent photoelectric performance. MoTe 2 Generally, there are three structures: semiconductor, metal and semi-metal. Among them, the semiconductor and semi-metal structures are relatively stable, and both the semi-metal structure and the metal structure have excellent photoelectric properties, especially high electrical conductivity; in order to meet the high electrocatalytic hydrogen production performance and long-term stability, the semi-metal structure is currently selected MoTe 2 , while in order to enhance the ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J37/10C25B11/06C25B1/04
CPCB01J27/0576B01J35/0033B01J37/10C25B1/04C25B11/091Y02E60/36
Inventor 贺海燕贺祯沈清
Owner SHAANXI UNIV OF SCI & TECH
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