首页|Photocatalytic degradation of tetracycline based on the highly reactive interface between graphene nanopore and TiO2 nanoparticles

Photocatalytic degradation of tetracycline based on the highly reactive interface between graphene nanopore and TiO2 nanoparticles

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The development of TiO2-based composites with a broad light response and outstanding photocatalytic performance is very important for the removal of antibiotics.In this work,we prepared a series of new porous graphene(PG)/TiO2 nanocomposites formed the different highly reactive interface within confined space via a partial combustion strategy using TiCl4 as the Ti source.The as-prepared PG/TiO2 exhibited the simultaneous effect of incredible adsorptivity and photodegradation performance toward tetracycline(TC)antibiotic under UV and visible light in contrast to conventional PG/TiO2,pure TiO2(P25)and PG.Optimization experiments showed that PG/TiO2-4% had the optimal removal performance among all the nanocomposites.The removal rate of TC reached up to 95.5%,which was 15% higher than that of I-PG/TiO2 and 25% higher than that of P25 within 90 min.The results were credited to(1)the high specific surface area and porous structure of PG,(2)the broad light response range and rapid separation of h~+ and e~-of PG/TiO2,and@the highly reactive interface between PG and TiO2 nanoparticles.In addition,active radical trapping experiments indicated that·O_2~-was crucial to the elimination of TC.This work showed the new potential of PG/TiO2 nanocomposites for the enhanced photocatalytic performance.

PG/TiO2InterfaceTetracyclineDegradationRemoval

Ning Zhang、Xiaofeng Ning、Jia Chen

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State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China

State Key Laboratory for Oxo Synthesis and Selective Oxidation,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou,730000,China

CAS Key Laboratory of Chemistry of Northwestern Plant Resources/Key Laboratory for Natural Medicine of Gansu Province,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou,730000,China

2022

10.1016/j.micromeso.2022.111958

Microporous and mesoporous materials

Microporous and mesoporous materials

EISCI
ISSN：1387-1811
年,卷(期)：2022.338
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