Preparing method of TiO2/MoS2 ultra-thin nanosheet array composite
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A technology of nanosheet array and composite material, which is applied in the field of preparation of TiO2/MoS2 ultrathin nanosheet array composite material, can solve the problem of few reduction reports, achieve green synthesis route, good practical value and development prospect, and method repeatability Good results
Active Publication Date: 2019-08-09
WENZHOU UNIVERSITY
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Looking for a cheap and highly active CO 2 The reduction of catalysts has become the research direction of many scholars, and MoS 2 Electrocatalyst
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Embodiment 1
[0029] A kind of TiO 2 / MoS 2 A method for preparing an ultrathin nanosheet array composite material, comprising the following steps:
[0030] S1. Sonicate a 1*4cm molybdenum mesh in acetone solution, ethanol solution, hydrochloric acid solution and high-purity water for 1 hour respectively, take out the molybdenum mesh, and dry it in a vacuum drying oven;
[0031] S2. Weigh 10 mg of ammonium tetrathiomolybdate, add it to the reaction kettle, measure 30 mL of N,N-dimethylformamide with a graduated cylinder, pour it into the reaction kettle, and pipette 50 uL of hydrazine monohydrate, Add to the reaction kettle and stir for 15min;
[0032] S3. Put the molybdenum mesh treated in step S1 into the reaction kettle with tweezers, tighten the reaction kettle, put it into an oven, and conduct a hydrothermal reaction at 200° C. for 15 hours;
[0033] S4. After cooling to room temperature, use clean tweezers to take out the molybdenum mesh after step S3, ultrasonically wash it with d...
Embodiment 2
[0044] This example aims at TiO 2 / MoS 2 Ultrathin nanosheet array composites and MoS 2 Experimental comparison of the difference in electrocatalytic activity, in order to further understand the TiO prepared by the method of Example 1 2 / MoS 2 Properties of ultrathin nanosheet array composites.
[0045] TiO 2 / MoS 2 Ultrathin nanosheet array composites and MoS 2 The electrocatalytic LSV curve of Figure 9 shown.
[0046] TiO 2 / MoS 2 Ultrathin nanosheet array composites and MoS 2 Each piece is properly cut as the working electrode, the reference electrode is Ag / AgCl electrode, and the counter electrode is platinum electrode. The electrode is scanned by linear cyclic voltammetry, the scanning range is -0.61V--1.81V, and the scanning speed is 50mV / s . Through the above experimental method, get in 0.5M KHCO 3 The LSV curve in the electrolyte is as Figure 9 shown. The figure shows that loaded TiO 2 After TiO 2 / MoS 2 The hydrogen evolution activity of ultrathin ...
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Abstract
The invention discloses a preparing method of a TiO2/MoS2 ultra-thin nanosheet array composite. The method includes the steps of S1, conducting ultrasonic processing on a molybdenum net in an acetonesolution, an ethanol solution, a hydrochloric acid solution and high-purity water sequentially, taking out the molybdenum net, and drying the molybdenum net in a vacuum drying box; S2, adding ammoniumtetrathiomolybdate, N,N-dimethylformamide and hydrazine monohydrate into a reaction still to be stirred; S3, putting the molybdenum net into the reaction still, screwing down the reaction still, putting the reaction still into an oven, and conducting hydrothermal reaction for 15 hours at 200 DEG C; S4, conducting cooling until the room temperature is reached, taking out the molybdenum net, ultrasonically washing the molybdenum net with distilled water and absolute ethyl alcohol sequentially, drying the molybdenum net in the drying box at 65 DEG C, and depositing TiO2 on an atom layer of the obtained molybdenum net to obtain the TiO2/MoS2 ultra-thin nanosheet array composite. The preparing method is rich in raw material source, green in synthesis route and high in repeatability; the composite can be used for electro-catalytically reducing CO2, is high in catalytic activity and easy to operate and has high application value and practical value and broad development prospects.
Description
technical field [0001] The invention relates to the technical field of inorganic nanomaterials, in particular to a TiO 2 / MoS 2 Preparation method of ultrathin nanosheet array composite material. Background technique [0002] Since the development of modern social economy is inseparable from the use of energy materials, fossil fuels, as energy resources that human beings rely on daily, are forced to seek other ways to meet human energy needs due to their non-renewability, so the development of a Recyclable green energy has become a research hotspot. Among them, electrocatalytic reduction technology can convert CO 2 Converting to fuels such as hydrocarbons provides a new method for utilizing energy. Its products, such as alcohols, have the advantages of easy storage, easy transportation, and high combustion value, so they have become a research hotspot for researchers. Based on electrocatalytic reduction of CO 2 The reaction of is being more and more researched because o...
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