Preparation method of manganese dioxide supported catalyst
A supported catalyst, manganese dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve limited applications, difficult separation, easy aggregation, etc. problem, to achieve the effect of good recyclability, high catalytic activity, and strong catalytic activity
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Embodiment 1
[0020] (1) Configuration of spinning solution: Weigh 50mg of MWCNTs powder and add it to 18mL DMF solvent, and ultrasonically disperse for 0.5h; then add 6mL of acetone, 4.15g of PVDF powder and 0.60g of tetrabutylammonium chloride to the above solution, Stir continuously until completely dissolved, and prepare a PVDF solution with a concentration of 16%, wherein MWCNTs account for 0.19% of the spinning solution mass, and tetrabutylammonium chloride accounts for 2.3% of the spinning solution mass;
[0021] (2) Electrospinning: Ultrasonic the spinning liquid in the previous step for 0.5h, and spin by electrospinning method, the spinning voltage is 35kV, the receiving distance is 15cm, the liquid supply rate is 0.5mL / h, and multi-scale Structural MWCNTs doped PVDF nanofiber membrane;
[0022] (3) Hydrothermal growth of MnO 2 : Weigh 0.6g of potassium permanganate and dissolve it in 90mL of deionized water, take out the fiber membrane prepared in the previous step, and add it to...
Embodiment 2
[0024] Take 0.1 g of the catalyst prepared in Example 1 and add it into 50 mL of the methylene blue solution at pH=10.03 mM to test its catalytic degradation performance on methylene blue dye under sunlight irradiation. The ultraviolet-visible absorption spectrum during the dye degradation process was tested with an EVOLUTION 220 ultraviolet-visible absorption spectrometer (Thermo, USA). figure 2 It is the multi-scale structure PVDF loaded MnO prepared by the embodiment 2 of the present invention 2 The UV-Vis absorption spectrum change diagram of the catalytic degradation of methylene blue dye by the catalyst. It can be clearly seen from the figure that the characteristic absorption peak of methylene blue at 664nm is gradually weakened, indicating that the catalyst has strong catalytic activity under sunlight irradiation, and the degradation rate of methylene blue is as high as 99% within 30 minutes.
Embodiment 3
[0026] (1) Configuration of spinning solution: Weigh 100mg MWCNTs powder into 18mL DMF solvent, ultrasonically disperse for 0.5h; then add 6mL acetone, 4.77g PVDF powder and 0.75g tetrabutylammonium chloride to the above solution, Stir continuously until completely dissolved, and prepare a PVDF solution with a concentration of 18%, in which MWCNTs account for 0.38% of the spinning solution mass, and tetrabutylammonium chloride accounts for 2.8% of the spinning solution mass;
[0027] (2) Electrospinning: with embodiment 1;
[0028] (3) Hydrothermal growth of MnO 2 : Weigh 0.45g of potassium permanganate and dissolve it in 90mL of deionized water, take out the fiber membrane prepared in the previous step, and add it to the potassium permanganate solution; add 2.0g of concentrated sulfuric acid dropwise to the above solution, and stir at room temperature for 1h in mass fraction Finally, the above mixture was transferred to a hydrothermal reaction kettle, and reacted at 60°C for...
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