Biomass-based carbon foam (CF) was prepared using bamboo powder as the raw material and polyurethane as the template.This CF was employed as a carrier for loading modified TiO2 via the in-situ growth method.During the fabrication of Gd-Fe-N co-doped titanium dioxide (GFN-TiO2) by the sol-gel method,CF was incorporated to synthesize the GFN-TiO2/CF composite.The catalytic performance of composite was evaluated through the catalytic degradation of methylene blue (MB).The morphology,chemical structure,elemental composition,and chemical valence states were characterized using techniques including scanning electron microscopy (SEM),X-ray diffraction (XRD),and X-ray photoelectron spectroscopy (XPS).The results indicated that when the mass fraction of GFN-TiO2 loading was 5%,the GFN-TiO2/CF composite exhibited optimal catalytic performance,achieving a MB degradation rate of 92% within 60 minutes,which was 11.15 times and 15.22 times that of pure CF and pure TiO2,respectively,with a first-order kinetic reaction rate constant of 0.0408min-1.Among composites with the same volume but different shapes,the sheet-shaped CF had the largest light contact area during degradation,thus showing the strongest catalytic capability,with degradation capacities of 1.18 times and 1.48 times that of the cube-shaped and rectangular prism-shaped composites,respectively.During the catalytic degradation of MB,the CF not only functioned as a carrier for TiO2 loading but also acted as an adsorbent to adsorb a certain amount of MB,thereby establishing an adsorption-photocatalysis synergistic system with TiO2.
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基金资助
国家自然科学基金(31960297);云南省农业基础研究联合专项(202301BD070001-079);云南省基础研究重点项目(202401AS070013);云南省中青年学术和技术带头人后备人才项目(202405AC350031)
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