A kind of graphyne/porous titanium dioxide photocatalyst and its preparation method and application
A photocatalyst and graphdiyne technology, applied in the field of photocatalysis, can solve the problems of uneven dispersion and easy agglomeration, and achieve the effect of solving uneven dispersion and strong force
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[0023] The invention provides a graphyne / porous TiO 2 The preparation method of photocatalyst comprises the following steps:
[0024] (1) mixing titanium salt, organic ligand and organic solvent to obtain a mixed solution;
[0025] (2) the mixed solution that described step (1) obtains and graphdiyne ultrasonic dispersion, obtain reaction solution;
[0026] (3) carry out hydrothermal reaction to the reaction solution that described step (2) obtains, obtain Ti-MOF / graphyne precursor;
[0027] (4) Calcining the Ti-MOF / graphyne precursor obtained in the step (3) in an argon atmosphere to obtain graphyne / porous TiO 2 catalyst of light.
[0028] The invention mixes the titanium salt, the organic ligand and the organic solvent to obtain a mixed solution. In the present invention, the molar ratio of the titanium salt, the organic ligand and the organic solvent is preferably 1:(1~8):(550~1050), more preferably 1:(2~6.5):(650~880 ).
[0029] In the present invention, the titanium...
Embodiment 1
[0047] Dissolve 0.272g of isopropyl titanate and 0.401g of terephthalic acid in 50mL of DMF, stir for 30min; add 9mg of graphyne into the solution, and ultrasonicate for 15min to obtain a reaction solution; moles of titanium salt, organic ligand and organic solvent The ratio is: 1:2.5:650, and the concentration of graphyne is 0.18mg / mL.
[0048] Add the reaction solution into a polytetrafluoroethylene reactor, place it in a blast drying oven at 125°C for 24h (heating rate: 10°C / min), and obtain a precipitate; the precipitate is washed three times with DMF, centrifuged and placed at 120 °C in a vacuum oven for 12 hours to obtain a Ti-MOF / graphyne precursor.
[0049] The above-mentioned precursor was calcined at 600°C for 1.5h, the heating rate was 1°C / min, and the temperature was naturally cooled to room temperature to obtain a photocatalyst with a specific surface area of 495.8m 2 / g.
[0050] Fill 30mg of photocatalyst into the photocatalytic reaction tube, and react unde...
Embodiment 2
[0053] Dissolve 0.32g tetrabutyl titanate and 0.532g aminoterephthalic acid in 55mL DMF and stir for 30min; take 10.5mg graphyne and add it into the solution, and ultrasonicate for 15min to obtain a reaction solution; titanium salt, organic ligand and organic solvent The molar ratio is: 1:3.1:758.3, and the concentration of graphyne is 0.19mg / mL.
[0054] Add the reaction solution into a polytetrafluoroethylene reactor, place it in a blast drying oven at 125°C for 30h (heating rate: 10°C / min), and obtain a precipitate; the precipitate is washed three times with DMF, centrifuged and placed at 125 °C in a vacuum oven for 15 hours to obtain a Ti-MOF / graphyne precursor.
[0055] The above precursor was calcined at 650 °C for 2 h, the heating rate was 1 °C / min, and the temperature was naturally cooled to room temperature to obtain a photocatalyst with a specific surface area of 402.8 m 2 / g.
[0056] 25 mg of photocatalyst was filled into the photocatalytic reaction tube. Under...
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