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王利平教授课题组在“CrystEngComm”发表研究论文

   发布时间: 2015-05-12    访问次数: 336

Synthesis of g-C3N4-sensitized and NaNbO3-substrated II-type

heterojunction with enhanced photocatalytic degradation activity

 

Song Chengjie, Fan Mingshanb, Hu Bo, Chen Tianjun, Wang Liping*

CrystEngComm, 2015, DOI: 10.1039/C5CE00622H.SCIIF=3.858

 

AbstractThe g-C3N4 (CN) sensitized and NaNbO3 (NN) substrated II-type heterojunction (g-C3N4/NaNbO3) is prepared by solid phase calcination method with urea and NN. The layered CN is anchoring on the surface of cubic NN. The samples are characterized by XPS, UV–vis spectroscopy,FE-SEM, XRD and FT-IR. The photodegradation mechanism of RhB solutions under visible light irradiation is investigated. Electron paramagnetic resonance (ESR) and radical scavenger experiments reveal that the main active specie is O2•-and the OH•also plays a role in the photodegradation process. Compared with pure CN, the CN/NN hybrid materials display much excellent photocatalytic activity for rhodamine b (RhB), methyl orange (MO) and tetracycline (TC) degradation under visible-light irradiation. The 8-CN/NN sample shows highest degradation rate (1.888h-1) and it is 2.7 times than that of pure CN (0.697). The photodegradation of RhB, MO and TC all fit to pseudo first order kinetics by all CN/NN photocatalysts. The photocatalysts also possess great stability. The exploration of CN/NN photocatalyst is significant for the further practical application of photocatalysis in wastewater treatment.