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Method for preparing molybdenum disulfide nanoparticles with product form controllable

A technology for nanoparticles and molybdenum disulfide, which is applied in the field of preparing molybdenum disulfide nanoparticles, can solve the problems of single product form, inability to prepare nanoparticles, difficult product form control, etc., and achieves simple and feasible methods, rich product forms, Excellent performance

Active Publication Date: 2017-07-28
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above preparation of MoS 2 The sulfur source used in the nanoparticle method basically chooses thioacetamide, which has high toxicity and high cost, and the prepared product has a single form, and the form control of the product is relatively difficult.
At the same time, it is impossible to prepare MoS with curled flakes, fibers and loose porous structures. 2 Nanoparticles, so the prepared products cannot be better used in the technical fields of lubricants and photocatalytic materials

Method used

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  • Method for preparing molybdenum disulfide nanoparticles with product form controllable
  • Method for preparing molybdenum disulfide nanoparticles with product form controllable
  • Method for preparing molybdenum disulfide nanoparticles with product form controllable

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Dissolve 1.0g sodium molybdate and 2.6g sodium sulfide in 50mL water at the same time, add 0.79g acetamide as a form regulator, add hydrochloric acid under stirring until the pH value is less than 2, sodium molybdate and sodium sulfide immediately dissolve in strong acid The rapid reaction in the solution produces amorphous molybdenum sulfide precipitates, and then MoS is obtained after filtration, washing, drying and calcination in a nitrogen atmosphere at 480 °C. 2 nanoparticles. figure 1 is the MoS prepared in Example 1 2 Scanning electron microscope SEM image of nanoparticles, through figure 1 It can be seen that when acetamide is selected as the morphology regulator, the prepared product is in the form of a partially curled sheet with a size of 100 to 200 nm (compared with the size of about 30 nm prepared when the morphology regulator is not used in the patent CN200710019871.8). nanoflakes are much larger). Because the sheet structure is thin, and other two-dime...

Embodiment 2

[0023] Dissolve 1.0g sodium molybdate and 2.6g sodium sulfide in 100mL water at the same time, then add 1.0260g ammonium acetate as a form regulator, add hydrochloric acid under stirring until the pH value is less than 2, sodium molybdate and sodium sulfide immediately dissolve in strong acid The rapid reaction in the solution produces amorphous molybdenum sulfide precipitates, and then MoS is obtained after filtration, washing, drying and calcination in a nitrogen atmosphere at 480 °C. 2 nanoparticles. figure 2 is the MoS prepared in Example 2 2 Scanning electron microscope SEM image of nanoparticles, through figure 2 It can be seen that when ammonium acetate is selected as the morphology regulator, the prepared product is in the form of short fibers with a length of 30-100 nm. The short fiber shape is a nanostructure form that is difficult to prepare by existing preparation methods.

Embodiment 3

[0025] Dissolve 2.0g sodium molybdate and 2.0g sodium sulfide in 10mL water at the same time, then add 0.5g acetamide and 0.5g ammonium acetate as a form regulator, add hydrochloric acid under stirring until the pH value is less than 2, sodium molybdate and sulfide Sodium immediately reacts quickly in a strong acidic solution to produce amorphous molybdenum sulfide precipitates, and then MoS is obtained after filtration, washing, drying and calcination in a nitrogen atmosphere at 480 °C 2 nanoparticles. image 3 is the MoS prepared in Example 3 2 Scanning electron microscope SEM image of nanoparticles, through image 3 It can be seen that when the shape modifier is acetamide and ammonium acetate at a weight ratio of 1:1, the prepared product is in the shape of a round cake with a diameter of 50-80 nm. This disc shape is a nanostructure shape that is difficult to prepare by existing preparation methods.

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Abstract

The invention provides a method for preparing molybdenum disulfide nanoparticles with a product form controllable and relates to the technical field of lubricating agents and photocatalytic materials. The method comprises the following steps: taking sodium molybdate as a molybdenum source and sodium sulphide as a sulphur source, reacting in strong acid solution, and adding ammonium acetate and / or acetamide in a reaction system as a form regulator, so that the molybdenum disulfide nanoparticles are prepared; product forms of the prepared molybdenum disulfide nanoparticles can be changed as different form regulators are selected. By utilizing the preparation method provided by the invention, MoS2 nanoparticles which are novel in form and can not be obtained by adopting an existing method can be smoothly prepared. The invention provides a new form regulation and control method, the method is simple and feasible, and the molybdenum disulfide nanoparticles with more excellent performance and more abundant product forms can be prepared by adding different form regulators; and the sulphur source selected in the invention is sodium sulphide instead of thioacetamide with relatively high toxicity and relatively high cost, so that the preparation method provided by the invention is lower in cost and applicable to industrial production.

Description

technical field [0001] The invention relates to the technical field of lubricants and photocatalytic materials, in particular to a method for preparing molybdenum disulfide nanoparticles with controllable product form. Background technique [0002] Molybdenum disulfide (MoS 2 ) has excellent lubricating and photocatalytic properties, and has broad application prospects in the fields of solid lubrication, hydrodesulfurization and photocatalysis. When MoS 2 When the particle size reaches the nanoscale, its lubricating and catalytic performance will generally be greatly improved, so MoS 2 The preparation of nanoparticles has been MoS 2 One of the research hotspots in the field; in addition, recent studies have also shown that MoS 2 The properties of nanoparticles are closely related to their morphology, and different morphologies of MoS 2 Nanoparticles can be applied in different fields, such as spherical MoS 2 Nanoparticles are more suitable for use in the field of lubri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06B82Y40/00
CPCC01G39/06C01P2004/03C01P2004/10C01P2004/22C01P2004/62C01P2004/64
Inventor 胡坤宏曹真真陆紫嫣胡恩柱郭建华
Owner HEFEI UNIV
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