首页|Photocatalytic Degradation of Bisphenol A by TiO2 Mineralized Using a Polystyrene-Peptide Template
Photocatalytic Degradation of Bisphenol A by TiO2 Mineralized Using a Polystyrene-Peptide Template
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NSTL
Biomineralization is an environment-friendly strategy for producing inorganic materials,where nitrogen-doped particles of controlled size can be synthesized.A peptide-mediated biomineralization was investigated to produce TiO2 particles with enhanced photocatalytic activity.The heptapeptide,HKKPSKS,verified previously as exhibiting TiO2 mineralizing activity,was immobilized on the surface of functionalized polystyrene(PS)bead through N-ethyl-N-(3-dimethylamino-propyl)carbodii-mide hydrochloride-N-hydroxy-succinimide(EDCNHS)coupling,so that it acted as the nucleus to trigger TiO2 precipitation on its surface in ambient condition.During the calcination of PS peptideTiO2,the PSpeptide template both allowed the formation of porous-structured particles,and generated nitrogen-doped crystalline mixed phase(anatase/rutile)TiO2.More than 86% of bisphenol A(BPA)was decomposed in the presence of optimally calcined TiO2 under visible light in 2 h,whereas commercial P25 catalyst degraded 48% of BPA.After five cycles of repeated reactions for BPA degradation,the photocatalytic activity of TiO2 decreased by less than 10%.
NSTL
