A monolithic ceramic support with high porosity and mechanical strength was fabricated using construction waste and alumina as the main raw materials,aluminum fluoride and as a whisker catalyst,boron oxide as a sintering aid,and corn starch as a pore-forming agent.The influences of aluminum fluoride and boron oxide content on the crystalline phase,microstructure,open porosity,and flexural strength of the resulting porous ceramics were investigated.The optimal composition of porous ceramic supports was determined to be 40wt% construction waste,44wt% alumina,13wt% aluminum fluoride,and 3wt% boron oxide,as well as 10wt% pore-forming agent of above inorganic powders.The porous ceramic,sintered at 1 150℃ for 120 min exhibited the best performances,with an open porosity of 62.99% and a flexural strength of 7.44 MPa.Subsequently,Palladium catalyst was then loaded onto the porous ceramic support through an impregnation method.And the catalytic properties were evaluated using methylene blue as simulated wastewater.It was observed that the simulated wastewater of methylene blue was degraded after 9.3 h using porous ceramic catalyst with Palladium soaked for 12 h,representing a 57.91% improvement in degrading efficiency compared to the unloaded catalyst.These findings demonstrated the potential of porous ceramic support for wastewater treatment applications.
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