Carbon fiber/titanium dioxide photoelectric composite material and preparation method and application thereof
A technology of titanium dioxide and composite materials, which is applied in the field of electrochemical energy storage, can solve the problems of low conductivity and limited application range, and achieve the effects of improving electrochemical performance, high repeatability, and large application potential
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[0030] A carbon fiber / titanium dioxide photoelectric composite material, the preparation method of which comprises the following steps:
[0031] 1) Activation of carbon fiber:
[0032] Add carbon fiber to the 2 O 2 solution (30wt%) with H 2 SO 4 solution (95wt%) composed of H 2 O 2 / H 2 SO 4 In the mixed solution, activated by stirring at room temperature for 1-3 hours, after taking out, washed with water and ultrasonic to obtain activated carbon fibers; among which carbon fibers, H 2 O 2 solution, H 2 SO 4 The feeding ratio of the solution is 2mg:3mL:(3-9)mL;
[0033] 2) Preparation of titanium-containing precursor:
[0034] Mix Pluronic F127 and tetrahydrofuran, then add 99.5wt% acetic acid solution, 36wt% hydrochloric acid solution, 98.5wt% tetrabutyl titanate, and water to mix uniformly; then heat the resulting mixed solution at 45-60°C for 24-48h , that is, the titanium-containing precursor is obtained;
[0035] Among them, the feeding ratio of Pluronic F127...
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[0041] Example 1:
[0042] A carbon fiber / titanium dioxide photoelectric composite material, the preparation method of which comprises the following steps:
[0043] 1) Add 2mg carbon fiber to 3mL H 2 O 2 (30%), 3 mL H 2 SO 4 (95%) in the mixed solution, stirred and activated at room temperature for 1 h, taken out and washed with water and sonicated at 5Khz for 30 s to obtain activated carbon fibers;
[0044] 2) 1.5g of titanium-containing precursor, 20mL of ethanol and 10mL of glycerol were sequentially added to the 50mL hydrothermal kettle, and stirred and mixed evenly; then 2mg of activated carbon fibers were added, the hydrothermal kettle was closed, and a solvothermal reaction was carried out at 100 ° C for 15h, After taking out, washed with water, and dried at 40 °C for 4 h to obtain a solvothermal product;
[0045] 3) The solvothermal product was placed in a nitrogen atmosphere, heated to 300°C at a heating rate of 10°C / min, and calcined at a constant temperature for ...
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[0048] Example 2:
[0049] A carbon fiber / titanium dioxide photoelectric composite material, the preparation method of which comprises the following steps:
[0050] 1) Add 2mg carbon fiber to 3mL H 2 O 2 (30%), 6 mL H 2 SO 4 (95%) in the mixed solution, and stirred and activated at room temperature for 2h, then taken out and washed with water and ultrasonicated at 5Khz for 30s to obtain activated carbon fibers;
[0051] 2) Add 2.0g of titanium-containing precursor, 24mL of ethanol and 6mL of glycerol to the 50mL hydrothermal kettle in turn, and stir and mix evenly; then add 2mg of activated carbon fibers, seal the hydrothermal kettle, and carry out solvothermal reaction at 150°C for 20h, After being taken out, washed with water, and dried at 60 °C for 2 h to obtain a solvothermal product;
[0052] Wherein, the titanium-containing precursor is prepared by the following method:
[0053] Mix 1.5g of Pluronic F127 with 20mL of tetrahydrofuran; add 2.5mL of acetic acid (99.5%...
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