Alpha-molybdenum trioxide@molybdenum disulfide material as well as preparation method and application thereof
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A technology of molybdenum disulfide and molybdenum trioxide, which is applied in the field of photocatalytic materials, can solve problems such as efficiency limitations, achieve the effects of reducing the band gap value, strong photocatalytic effect, and improving photocatalytic activity
Active Publication Date: 2019-11-22
陕西华钼实业有限公司
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MoS 2 As a co-catalyst has good catalytic activity, however, MoS 2 Tends to exhibit multilayer stacking state, its catalytically active sites are mainly located at the edge which limits its efficiency
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Embodiment 1
[0038] A preparation method of α-molybdenum trioxide@molybdenum disulfide material, comprising the following steps:
[0039] S1. Add 1.7g of sodium molybdate dihydrate into 140mL of water, ultrasonically dissolve, then add 10mL of concentrated nitric acid, and stir for 1 hour at 30°C to obtain molybdate nitric acid solution;
[0040] S2. The molybdate nitric acid solution is subjected to hydrothermal reaction, cooled after the end, and the supernatant is removed to obtain a precipitate, which is washed twice with water, washed twice with ethanol, and dried to obtain α-MoO 3 Precursor;
[0041] S3, 1g of α-MoO 3 The precursor, 5g of P123, 0.2g of sodium molybdate dihydrate and 0.1g of thiourea were added to 340mL of acetonitrile, and the reaction was stirred at 30°C for 2h to obtain α-MoO 3 slurry;
[0042] S4. Under the condition of 180°C, the α-MoO 3 The slurry was subjected to solvothermal reaction for 10 hours, cooled after the end, and the supernatant was removed to ob...
Embodiment 2
[0054] In this example, except 1g of α-MoO in S3 3 The precursor was replaced with 2g, P123 was 5g, sodium molybdate dihydrate was 3g, thiourea was 0.5g, acetonitrile was 500mL, the temperature of the hydrothermal reaction was 190°C, and the rest were the same as in Example 1.
Embodiment 3
[0056] In this embodiment, except that 1.7g of sodium molybdate dihydrate in S1 is replaced by 1g, the water is 100mL, the concentrated nitric acid is 5mL, the temperature of the hydrothermal reaction in S3 is 170°C, and the time is 9h, the rest are the same as in Example 1. same.
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Abstract
The invention discloses an alpha-molybdenum trioxide@molybdenum disulfide material as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The alpha-molybdenum trioxide@molybdenum disulfide material is of a rod-like shell-core structure, a core is composed of alpha-MoO3 of a rod-like structure, and a shell is a film composed of MoS2.The preparation method comprises the following steps: adding sodium molybdate dihydrate into water, carrying out ultrasonic dissolution, adding concentrated nitric acid, carrying out a stirring reaction, and carrying out a hydrothermal reaction to obtain an alpha-MoO3 precursor; adding an alpha-MoO3 precursor, a surfactant, sodium molybdate dihydrate and thiourea into acetonitrile, and stirring for reaction to obtain alpha-MoO3 slurry; subjecting the alpha-MoO3 slurry to a hydrothermal reaction to obtain the alpha-MoO3@MoS2 material. The alpha-MoO3@MoS2 material has the advantages of accessible raw materials, low cost and simple preparation technique, and has great popularization and application values in the fields of photocatalytic materials and the like.
Description
technical field [0001] The invention belongs to the technical field of photocatalytic materials, and specifically relates to an α-molybdenum trioxide@molybdenum disulfide material, a preparation method and an application thereof. Background technique [0002] Pollutants in water include organic pollutants and inorganic pollutants. Organic pollutants mainly include oxygen-consuming non-toxic organic substances (such as protein, fat and carbohydrates, etc.) and toxic organic substances (such as phenolic compounds, organic pesticides and polycyclic aromatic hydrocarbons, dyes and food additives, etc.). Inorganic pollutants mainly include heavy metal ions such as lead, chromium, platinum, mercury and copper. Among them, chromium ion, namely Cr(VI), is more easily absorbed by the human body, and accumulates in the human body, which is more toxic, even has a lethal effect on aquatic organisms, and cannot be decomposed by microorganisms. It is listed as one of the most harmful con...
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