Synthesis method of two-dimensional transition metal chalcogenide
A technology of transition metal chalcogenides and synthesis methods, which is applied in the fields of energy technology, physics and electronics, and can solve problems such as harsh reaction conditions, high cost, and low yield
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Embodiment 1
[0054]This embodiment provides a method of preparing a transition metal compound MX, including:
[0055]1) Etching step: The powder of the transition metal compound Max is placed in an acidic solution, and the acidic ingredient in the acidic solution is etched after etching the A element, to obtain a suspension containing the transition metal compound MX;
[0056]2) Cleaning and drying step: The suspension liquid obtained by step 1) was purified and washed with deionized water. After removing the acidic component, the dry treatment obtained the powder of the transition metal compound MX;
[0057]Among them, in the transition metallic compound MAX, M represents one or more of transition metal elements, titanium, vanadium, ruthenium, zirconium, niobium, molybdenum, hafnium, tantalum, tungsten, and A represents aluminum, silicon, One of the elements of phosphorus, sulfur, gallium, germanium, arsenic, cadmium, indium, tin, 铊, lead and other elements, represents one of carbon, silicon, boron elem...
Embodiment 2
[0060]This example is in Mo2C Nanoflakes as an example to illustrate the preparation method of MX in the present invention, including steps:
[0061]1) Etch step: Put the raw material mo2GA2C powder is placed in aqueous hydrofluoric acid solution for etching, HF is etched after etching the Ga element.2C Nanofold Suspension;
[0062]2) Cleaning and drying step: The suspension liquid obtained by step 1) is purified and cleaned with deionized water. After removing the HF component, the freeze-drying treatment results in MO.2The powder of the c nanoflakes.
[0063]Example 1 and Example 2 Methods of MX nano sheets, wherein the preferred raw material MAX, including MO2GA2C, Mo2GEC, TI3SiC2, Ti2SNC, Ti2ALC, NB2ALC, TA2Alc, Tinbalc, Mo2TIALC2Or (w2 / 3Y1 / 3)2One or more of ALCs. MX nanofrapins for the synthesis method for the present invention, including: mo, by preparing the preferred raw material Max, including: Mo2C, Ti3C2, Ti2C, NB2C, TA2C, Tinbc, Mo2TIC2Or (w2 / 3Y1 / 3)2One or more of C in C.
Embodiment 3
[0065]This embodiment provides a method of synthesizing a two-dimensional transition metal thiomide compound, such asFigure 18 As shown, including the steps:
[0066]1) Heating step: In an inert gas environment, the raw material transition metal compound Mx is heated to a reaction temperature;
[0067]2) Topological conversion reaction step: a gas containing a sulfur element, or a mixed gas containing a sulfur element and a mixed gas containing a phosphor element, and maintains the reaction temperature, set the time long, so that the sulfur Elements, or, sulfur elements, and phosphoric elements, the topology transformation reaction occurs with the transition metal compound MX, and generate two dimensional transition metal sulfide compounds.
[0068]Among them, a gas containing a sulfur element refers to one or more of highly active gaseous sulfur, selenium,, hydrogen sulfide, selenide or hydrogen or hydrogen, containing a gas, including high-active gaseous phosphorus. One or more of arsenic,...
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