Optimizing the interface of C/titania@reduced graphene oxide nanofibers for improved photocatalytic activity
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Photocatalysis has been proved a promising technology to alleviate the deterioration of environments by utilizing light energy. High efficiency and cycling stability are important for pollutant degradation in practical wastewater treatment. Herein we prepared C/titania@reduced graphene oxide nanofibers (C/TiO2@RGO NFs) by electrospun polyacrylonitrile/titania nanofibers (PAN/TiO2 NFs) wrapped with graphene oxide (GO)assisted with polydopamine, followed by one-step GO reduction, TiO2 crystallization and interface enhancing between anatase TiO2 and graphene by forming chemical bonding via heat treatment. The as-prepared C/TiO2@RGO NFs exhibited four times photocatalytic efficiency higher than commercial catalyst P25, and they also exhibited favorable cycling stability for methylene blue degradation under visible light illumination. The high photocatalytic efficiency is mainly attributed to the efficient charge separation and broadening visible light absorption originating from the interface enhancing between TiO2 and RGO. This work provides an insight to design more efficient graphene-based semiconductor photocatalysts for pollutant decomposition.
The authors would like to thank the National Natural Science Foundation of China (51273015) for its financial support.
- 12.Lu ZY, Yu ZH, Dong JB, Song MS, Liu Y, Liu XL, Ma ZF, Su H, Yan YS, Huo PW (2017) Facile microwave synthesis of a Z-scheme imprinted ZnFe2O4/Ag/PEDOT with the specific recognition ability towards improving photocatalytic activity and selectivity for tetracycline. Chem Eng J 337:228–241CrossRefGoogle Scholar
- 20.Salim NE, Jaafar J, Ismail AF, Othman MHD, Rahman MA, Yusof N, Qtaishat M, Matsuura T, Aziz F, Salleh WNW (2018) Preparation and characterization of hydrophilic surface modifier macromolecule modified poly (ether sulfone) photocatalytic membrane for phenol removal. Chem Eng J 335:236–247CrossRefGoogle Scholar
- 32.Karaolia P, Michael-Kordatou I, Hapeshi E, Drosou C, Bertakis Y, Christofilos D, Armatas GS, Sygellou L, Schwartz T, Xekoukoulotakis NP, Fatta-Kassinos D (2018) Removal of antibiotics antibiotic-resistant bacteria and their associated genes by graphene-based TiO2 composite photocatalysts under solar radiation in urban wastewaters. Appl Catal B 224:810–824CrossRefGoogle Scholar