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A kind of manganese molybdate carbon composite nanosphere and preparation method thereof
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A nanosphere and carbon composite technology, which is applied in the preparation/purification of carbon, manganese compounds, nanotechnology, etc., can solve the problems of high temperature and high pressure, complex process, and low product purity, and achieve the effect of overcoming harsh reaction conditions and simple process
Active Publication Date: 2021-09-24
SHAANXI UNIV OF SCI & TECH
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The manganese molybdate micronano disclosed in the above invention requires high temperature and high pressure, complicated process, and a large amount of surfactant (such as CTAB) is added in the preparation process, and the product purity is generally not high
Chinese invention patent CN20110347506.6 discloses the preparation method of manganese molybdate nanospheres, but the microwave radiation method used is not conducive to large-scale industrial preparation
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Embodiment 1
[0027] 1) Prepare a manganese nitrate aqueous solution with a concentration of 0.01mol / L and a sodium molybdate aqueous solution with a concentration of 0.3mol / L respectively, and mix them at a volume ratio of 1:0.1 to obtain a reaction solution;
[0028] 2) The reaction solution was left to stand for 10 minutes, stirred at room temperature for 3 hours, and the precursor was obtained after washing and drying;
[0029] 3) Disperse 10 mg of the precursor in 50 mL of 2-hydroxyacetylacetamide aqueous solution with a concentration of 0.1 mol / L to obtain the reaction solution A, stir at room temperature for 1 h to react, after the reaction is completed, filter, wash and dry to obtain the product A ;
[0030] 4) The product A was calcined at 550° C. for 2 h under an argon atmosphere to obtain manganese molybdate-carbon composite nanospheres.
[0031] see figure 1 , figure 1 It is the scanning electron micrograph of the manganese molybdate carbon composite nanosphere that embodimen...
Embodiment 2
[0035] 1) Prepare a manganese acetate aqueous solution with a concentration of 0.05mol / L and an ammonium molybdate aqueous solution with a concentration of 0.5mol / L respectively, and mix them according to the volume ratio of 1:0.5 to obtain a reaction solution;
[0036] 2) The reaction solution was left to stand for 10 minutes, stirred at room temperature for 5 hours, and the precursor was obtained after washing and drying;
[0037] 3) Disperse 10 mg of precursor in 50 mL of 2-amino-4-nitrophenol aqueous solution with a concentration of 0.2 mol / L to obtain reaction solution A, stir at room temperature for 5 h for reaction, filter, wash and dry after the reaction After obtaining product A;
[0038] 4) Calcining the product A at 400° C. for 2 h under an argon atmosphere to obtain manganese molybdate-carbon composite nanospheres.
Embodiment 3
[0040] 1) Prepare a manganese sulfate aqueous solution with a concentration of 0.03mol / L and a sodium molybdate aqueous solution with a concentration of 0.4mol / L respectively, and mix them according to a volume ratio of 1:0.3 to obtain a reaction solution;
[0041] 2) Stir the reaction solution at room temperature for 4 hours to react, and after the reaction is completed, wash and dry to obtain the precursor;
[0042] 3) Disperse 10 mg of the precursor in 50 mL of 2-amino-4-chlorophenol aqueous solution with a concentration of 0.5 mol / L to obtain the reaction solution A, stir at room temperature for 3 h for reaction, and filter, wash and dry after the reaction Product A is obtained;
[0043] 4) The product A was calcined at 450° C. for 3 h under an argon atmosphere to obtain manganese molybdate-carbon composite nanospheres.
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Abstract
The invention discloses a manganese molybdate-carbon composite nanosphere and a preparation method thereof, belonging to the field of preparation of inorganic micro-nano materials. The preparation method of the manganese molybdate-carbon composite nanosphere of the present invention uses cheap and easy-to-obtain molybdenum salt and manganese salt to prepare the manganese molybdate precursor in an aqueous solution at normal temperature and pressure, and then utilizes the amino group and hydroxyl group contained in the aminophenol derivative The coordination between active functional groups and manganese molybdate can control its structure to form a nanosphere shape, and then obtain manganese molybdate carbon composite nanospheres by calcination; different from the prior art from molybdate and manganese ions Starting from the bottom-up construction of manganese molybdate nano-morphology and structure, the preparation method of the present invention adopts the opposite preparation method, starting from the simple and easy-to-obtain manganese molybdate precursor, and tailoring its structure from top to bottom , and the preparation method is green, energy-saving and simple in process, which overcomes the problems of harsh reaction conditions and complicated process in the prior art.
Description
technical field [0001] The invention belongs to the field of preparation of inorganic micro-nano materials, in particular to a manganese molybdate-carbon composite nanosphere and a preparation method thereof. Background technique [0002] With the depletion of fossil fuels, global warming and the enhancement of people's awareness of environmental protection, the development and utilization of new green energy has become more urgent. As a kind of electrochemical energy storage device, lithium-ion battery is favored in the research of new energy development because of its safety, high efficiency and environmental friendliness. Manganese molybdate (MnMoO 4 ) Due to rich molybdenum resources, strong structure adjustability and many active sites, it is widely used in energy storage, luminescence, catalysis and other fields. [0003] However, the micro-nano structure of manganese molybdate is unstable, and there are still some difficulties and challenges in low-cost and large-sc...
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