Study on preparation and photocatalytic properties of bagasse carbon aerogels loaded with zinc oxide nanoparticles
A series of bagasse cellulose-based carbon aerogel-loaded zinc oxide nanocomposite(BCCA/ZnO)catalysts were successfully prepared by immersion-calcination method for the degradation of Methyl Orange(MO)dye.The prepared BCCA/ZnO was characterised by field emission scanning electron microscopy(FE-SEM),Fourier transform infrared spec-troscopy(FT-IR),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),UV-Vis diffuse reflection(UV-visible DRS)and specific surface area,etc.The study revealed that BCCA possessed a three-dimensional porous network structure.After being soaked in a zinc acetate solution and undergoing high-temperature carbonisation,spherical ZnO nanoparticles were generated in situ on the surface of BCCA.Excellent catalytic activity of BCCA/ZnO was demonstrated by simulating the UV environment,in which BCCA/ZnO-3 could degrade the MO solution in 80 min for 99%under the opti-mal conditions of pH=11.After 4 repeated use,the degradation efficiency of BCCA/ZnO-3 for MO was 99%in 80 min,which still showed excellent catalytic effect,indicating that it had good stability and reusability.While,the photocatalytic degradation mechanism was investigated.It was found that·OH played a major role,h+played a minor role,and·O2-did not play a role.
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