Core-shell structured C-TiO2 nanocomposites for efficient photocatalytic degradation of organic dyes
The flourishing development on chemical,textile printing and dyeing as well as pesticide and chemical fertilizer industries has pushed forward the progress for human society,however,it also brings huge problems for environmental management.Currently,photocatalytic degradation is limited to the degradation of a single organic pollutant at a specific wavelength although the real situation is often more complex.Therefore,it is particularly important to develop a multifunctional photocatalytic material for photocatalytic degradation of various organic pollutants.Here,we synthesized C-TiO2 composite precursors with core-shell structure by a one-step template-free solvothermal method.The C-TiO2 composite photocatalytic materials with high crystallinity was obtained by calcination under argon atmosphere.SEM,TEM,XRD and TG analysis revealed that the samples calcined at 550℃maintained a complete core-shell structure with highly crystalline anatase-phase TiO2 containing a small amount of carbon.In addition,the C-TiO2 composite exhibited high specific surface area of 85.69 m2·g-1,the average pore size of 16.4 nm,and the pore volume of 0.423 m3·g-1.The C-TiO2 composite showed enhanced photocatalytic degradation activity for rhodamine B(RhB),methylene blue(MB)and Congo Red(CR)dyes under UV-vis light irradiation,respectively.
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