A method for in-situ growth of titanium dioxide on polymer surface
A titanium dioxide, in-situ growth technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problems of difficult recovery of titanium dioxide catalysts and low catalytic efficiency, etc. Achieve the effects of good stability and photocatalytic performance, simple operation process, and wide application prospects
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Embodiment 1
[0032] (1) Dissolve 5g of PVDF powder in a mixed solution of 25mL of DMF (N,N dimethylformamide) and 15mL of acetone, stir evenly, stir vigorously for a period of time to obtain a uniform and transparent sol, and add 4mL of tetra-normal titanate dropwise to the sol Butyl ester, continue stirring to obtain a homogeneous sol.
[0033] (2) PVDF fibers were prepared by electrospinning.
[0034] (3) Mix hydrochloric acid and deionized water with a mass fraction of 36.5% according to the ratio of 1:1 by volume, and pour it into the reaction kettle, place the PVDF fiber prepared by electrospinning above the hydrochloric acid, and do not immerse it in hydrochloric acid , and then kept at 130°C for 9h. After the reaction, the PVDF fibers were taken out and dried to obtain TiO 2 / PVDF composite fiber such as figure 1 shown.
[0035] TiO prepared in this embodiment 2 / TiO in PVDF composite fiber 2 The XRD pattern of image 3 As shown, it can be seen from the intensity distribution ...
Embodiment 2
[0039] (1) Dissolve 1.8g of PVP powder in a mixed solution of 7g of ethanol and 5g of acetic acid, stir evenly, stir vigorously for a period of time to obtain a uniform and transparent sol, add 2mL of tetra-n-butyl titanate dropwise to the sol, and continue stirring to obtain a uniform Sol.
[0040] (2) PVP fibers were prepared by electrospinning.
[0041] (3) Mix hydrochloric acid and deionized water with a mass fraction of 36.5% according to the ratio of 1:5 by volume, and pour it into the reaction kettle, and place the PVP fiber prepared by electrospinning above the hydrochloric acid, and cannot be immersed in hydrochloric acid , and then kept at 100°C for 10h. After the reaction, the PVP fiber was taken out and dried to obtain the TiO 2 / PVP composite fiber such as figure 2 shown.
Embodiment 3
[0043](1) Dissolve 6g of PVDF powder in a mixed solution of 30mL of DMF (N,N dimethylformamide) and 10mL of acetone, stir evenly, stir vigorously for a period of time to obtain a uniform and transparent sol, add 10mL of tetra-normal titanate dropwise to the sol Butyl ester, continue stirring to obtain a homogeneous sol.
[0044] (2) Pour an appropriate amount of colloid into the casting film tray, scrape it with a blade, and dry it.
[0045] (3) Mix hydrochloric acid and deionized water with a mass fraction of 36.5% according to the volume ratio of 1:8, and pour it into the reaction kettle, and place the film obtained in step (2) above the hydrochloric acid, and cannot be immersed in the hydrochloric acid. , and then kept at 90°C for 15h, and after the reaction, the film was taken out and dried.
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Abstract
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