Abstract
Photocatalytic degradation is a promising method to solve the problem of ceftriaxone sodium wastewater. In this paper, Ag/TiO2@C composite materials with different Ag molar contents, where cellulose-derived carbon beads used as the carrier, were successfully prepared by the One-Pot method. In Ag/TiO2@C composite photocatalyst, Ag nanoparticles were deposited on TiO2 particles to form a metal-semiconductor structure, where charge carriers were effectively separated under the Surface Plasmon Resonance effect of Ag nanoparticles, thereby extending the lifetime of charge carriers. Ag/TiO2@C has been found of higher photocatalytic degradation performance compared to pure TiO2 and pure carbon beads. Among all, Ag (0.5%)/TiO2@C has the best catalytic performance. According to the Langmuir-Hinshelwood model, the photodegradation rate followed first-order kinetics, with the highest apparent rate of 0.0091 min−1. According to the results of mass spectrometry, ceftriaxone sodium was degraded into small molecules and eventually degraded into CO2, H2O, and we proposed possible pathways and photocatalytic mechanism accordingly.
Published Version
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