Hollow molybdenum disulfide/molybdenum trioxide flower-like spherical heterostructure nano material, preparation method and application

A molybdenum trioxide flower, molybdenum disulfide technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of affecting catalyst performance, weak cycle stability, low conductivity, etc. Easy batch preparation, excellent electrochemical performance, less environmental pollution

Inactive Publication Date: 2017-09-15
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its low conductivity and weak cycle s

Method used

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  • Hollow molybdenum disulfide/molybdenum trioxide flower-like spherical heterostructure nano material, preparation method and application
  • Hollow molybdenum disulfide/molybdenum trioxide flower-like spherical heterostructure nano material, preparation method and application
  • Hollow molybdenum disulfide/molybdenum trioxide flower-like spherical heterostructure nano material, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of hollow MoS 2 / MoO 3 A method for preparing a spherical heterostructure nanomaterial, comprising the steps of:

[0033] 1) In a 100mL beaker, add 22mg of ammonium tetrathiomolybdate and 22mg of urea, add 35ml of N,N-dimethylformamide, and sonicate in an ultrasonic cleaner for 50min to form a homogeneous solution. Then add 0.1ml hydrazine hydrate, and sonicate again for 30min in an ultrasonic cleaner;

[0034] 2) Transfer the solution obtained in step 1) into a 100ml reaction kettle, put it into an electric constant temperature blast drying oven for solvothermal reaction, keep at 200°C, and react for 10h;

[0035]3) After the reaction, cool down to room temperature naturally, centrifuge the reaction solution, wash the precipitate, and dry it in vacuum to obtain hollow MoS 2 / MoO 3 Flower spherical heterostructure nanomaterials.

[0036] The resulting target product is hollow MoS 2 / MoO 3 The transmission electron microscope TEM image of flower spherical h...

Embodiment 2

[0048] A calcined MoS 2 / MoO 3 The preparation method of nanometer material, it comprises the steps:

[0049] 1) Add ammonium tetrathiomolybdate, urea, and hydrazine hydrate into DMF: same as Step 1 of Example 1);

[0050] 2) Solvothermal reaction: same as step 2 of Example 1);

[0051] 3) Washing, drying, and collecting the product are the same as Step 3) of Example 1.

[0052] 4) Carbonize at 350°C for 2h, cool naturally to room temperature, and the obtained black powder is calcined MoS 2 / MoO 3 nanomaterials.

Embodiment 3－6

[0054] A kind of hollow MoS 2 / MoO 3 A method for preparing a spherical heterostructure nanomaterial, comprising the steps of:

[0055] 1) Add ammonium tetrathiomolybdate, urea, and hydrazine hydrate into DMF: same as Step 1 of Example 1);

[0056] 2) Solvothermal reaction, the difference is that the reaction time is 2, 4, 6, 8h respectively: other steps are the same as step 2 of Example 1);

[0057] Washing, drying, and collecting the product are the same as Step 3 of Example 1).

[0058] Examples 3 to 6 prepare the obtained hollow MoS 2 / MoO 3 Transmission electron microscope TEM image of flower spherical heterostructure nanomaterials Figure 7 shown. In the first stage, within 2 h, solid MoS was grown 2 / MoO 3 Ball flowers, the product does not have a cavity structure ( Figure 7 Middle a). With the increase of reaction time, after 6 h of reaction, the bulb flower gradually formed a cavity structure, and the cavity structure gradually became larger in the subseque...

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Abstract

The invention relates to a preparation method for a hollow molybdenum disulfide/molybdenum trioxide flower-like spherical heterostructure nano material. The preparation method comprises the following steps: 1) dispersing ammonium tetrathiomolybdate, urea and hydrazine hydrate into N,N-dimethyl formamide so as to form a homogeneous solution; 2) transferring the solution obtained in the step 1) into a reaction kettle, and performing reaction for 8-10 hours at 160-240 DEG C; 3) after the reaction is completed, naturally cooling to the room temperature, performing solid-liquid separation, and washing and drying precipitate, thereby obtaining the hollow MoS2/MoO3 flower-like spherical heterostructure nano material. By adopting the hollow MoS2/MoO3 flower-like spherical heterostructure nano material provided by the invention, the hydrogen evolution(HER) performance of a catalyst is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanomaterial chemistry and electrochemistry, and specifically relates to a hollow molybdenum disulfide / molybdenum trioxide (MoS 2 / MoO 3 ) Flower spherical heterostructure nanomaterials, preparation methods and their application in improving the hydrogen evolution performance of catalysts. Background technique [0002] Since the 21st century, energy and environmental issues have become increasingly prominent, and the development of clean new energy has attracted more and more attention. Hydrogen energy is known as the clean energy with the most development potential due to its advantages such as high combustion calorific value, wide application, and environmental friendliness. Therefore, unremitting efforts have been made to find sustainable and efficient methods for producing hydrogen. Electrocatalytic hydrogen evolution reaction and photocatalytic hydrogen evolution reaction are considered ...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/08B01J37/08C25B1/04C25B11/06
CPCB01J27/051B01J35/0033B01J35/08B01J37/08C25B1/04C25B11/04Y02E60/36
Inventor 张佳楠孙健薛晓艺尚佩许群
Owner ZHENGZHOU UNIV
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