A kind of preparation method of selenium/vanadium selenide composite phase material
A composite material, vanadium selenide technology, applied in the field of electrocatalytic energy material preparation, can solve the problems of small ionization energy, etc., and achieve the effects of improving catalytic activity, short preparation cycle, and easy control of reaction
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Embodiment 1
[0030] 1) Take by weighing selenium dioxide and vanadium pentoxide in a molar ratio of 5:1, that is, the quality of the two is 554.79mg and 182.00mg respectively, and it is dissolved in deionized water and anhydrous water with a volume ratio of 3:1. In a solution composed of ethanol (35 mL in total), magnetically stirred for 30 min to obtain a mixed solution;
[0031] 2) Transfer the resulting mixed solution in step 1) to a 50mL autoclave with p-polyphenyl liner, then add 0.038g of hexamethylenetetramine, 0.324g of dodecane to the reactor Sodium sulfate, 0.023g of polyvinylpyrrolidone and 0.087g of N,N-dimethylformamide morphology regulator, the reaction kettle was sealed, and placed in an oven at 220°C for 18 hours;
[0032] 3) After the reaction is finished, cool to room temperature naturally to obtain a black product, which is repeatedly centrifuged 3 times with ultrapure water and absolute ethanol;
[0033] 4) Finally, vacuum-dry the obtained sample at 50° C. to obtain a ...
Embodiment 2
[0036] 1) Take sodium selenide and ammonium metavanadate with a molar ratio of 3:1, namely the quality of the two is 374.82mg and 116.99mg respectively, and it is dissolved in deionized water and anhydrous water with a volume ratio of 4:1. In a solution composed of ethanol (35 mL in total), magnetically stirred for 30 min to obtain a mixed solution;
[0037]2) Transfer the resulting mixed solution in step 1) to a 50mL autoclave with p-polyphenyl liner, then add 0.059g of hexamethylenetetramine, 0.226g of dodecane to the reactor Sodium sulfate, 0.035g of polyvinylpyrrolidone and 0.056g of N,N-dimethylformamide morphology regulator, the reaction kettle was sealed, and placed in an oven at 200°C for 24 hours;
[0038] 3) After the reaction is finished, cool to room temperature naturally to obtain a black product, which is repeatedly centrifuged 3 times with ultrapure water and absolute ethanol;
[0039] 4) Finally, vacuum-dry the obtained sample at 120° C. to obtain a selenium / v...
Embodiment 3
[0042] 1) Take by weighing selenium powder and vanadium chloride in a molar ratio of 4:1, that is, the quality of the two is 315.84mg and 157.30mg respectively, and it is dissolved in deionized water and absolute ethanol with a volume ratio of 3:1. in the solution (totally 35mL), magnetically stirred for 30min to obtain a mixed solution;
[0043] 2) Transfer the resulting mixed solution in step 1) to a 50mL autoclave with p-polyphenyl liner, then add 0.048g of hexamethylenetetramine, 0.275g of dodecane to the reactor Sodium sulfate, 0.029g of polyvinylpyrrolidone and 0.072g of N,N-dimethylformamide morphology regulator, the reaction kettle was sealed, and placed in an oven at 210°C for 21 hours;
[0044] 3) After the reaction is finished, cool to room temperature naturally to obtain a black product, which is repeatedly centrifuged 3 times with ultrapure water and absolute ethanol;
[0045] 4) Finally, vacuum-dry the obtained sample at 90° C. to obtain a selenium / vanadium sele...
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