A kind of lignin carbon/nano titanium dioxide composite photocatalyst and its preparation method and application
A technology of nano-titanium dioxide and lignin carbon, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, and water treatment of special compounds. It can solve the problems of large titanium dioxide particles, restricted development, and uneven distribution, and achieve small particle size, The effect of improving photocatalytic efficiency and uniform distribution
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Embodiment 1
[0062] Prepare 2g / L lignosulfonate solution and 2g / L C 14 TAB solution, mix C with a volume ratio of 2:10 14 The TAB solution is added to the lignosulfonate solution, and the precipitate is separated and dried to obtain a lignin complex. Dissolve 1.0 parts by volume of butyl titanate in 9 parts by volume of ethanol, add 1.0 parts by mass of lignin compound, stir evenly, then slowly add dropwise to 30 parts by volume of water with a pH of 5, and stir at room temperature for 40 minutes. The composite solution was centrifuged, washed twice with distilled water, and dried at 80° C. for 4 h. The obtained solid was ground into a powder, and then 2 Calcined at 500° C. for 2 h under protection, and cooled to room temperature to obtain a lignin carbon / nano-titanium dioxide composite photocatalyst.
Embodiment 2
[0064] Prepare 2g / L lignosulfonate solution and 2g / L C 14 TAB solution, mix C with a volume ratio of 2:10 14 The TAB solution is added to the lignosulfonate solution, and the precipitate is separated and dried to obtain a lignin complex. Dissolve 1.0 parts by volume of butyl titanate in 9 parts by volume of ethanol, add 0.5 parts by mass of lignin compound, stir evenly, then slowly drop into 30 parts by volume of water with a pH of 5, and stir at room temperature for 40 minutes. The composite solution was centrifuged, washed twice with distilled water, and dried at 80° C. for 4 h. The obtained solid was ground into a powder, and then 2 Calcined at 600° C. for 2 h under protection, and cooled to room temperature to obtain a lignin carbon / nano-titanium dioxide composite photocatalyst.
Embodiment 3
[0066] Prepare 3g / L lignosulfonate solution and 3g / L C 14 TAB solution, mix C with a volume ratio of 3:10 14The TAB solution is added to the lignosulfonate solution, and the precipitate is separated and dried to obtain a lignin complex. Dissolve 1.0 parts by volume of butyl titanate in 9 parts by volume of ethanol, add 0.5 parts by mass of lignin compound, stir evenly, then slowly drop into 30 parts by volume of water with a pH of 5, and stir at room temperature for 40 minutes. The composite solution was centrifuged, washed twice with distilled water, and dried at 80° C. for 4 h. The obtained solid was ground into a powder, and then 2 Calcined at 700° C. for 2 h under protection, and cooled to room temperature to obtain a lignin carbon / nano-titanium dioxide composite photocatalyst.
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