Construction of BiOBrxI1−x/MXene Ti3C2Tx composite for improved photocatalytic degradability
- 18 Downloads
Forming BiOBrxI1−x solid solution structural photocatalyst has been regarded as an efficient method for photocatalytic property of bismuth oxyhalides (Bi–O–X, X = Br, Cl and I) photocatalysts. In this work, in order to further improve the photocatalytic property of BiOBrxI1−x, MXene Ti3C2Tx material was used to construct heterostructural photocatalyst with BiOBrxI1−x. The MXene Ti3C2Tx was achieved by etching the Ti3AlC2 with HF and its layered structure was firstly confirmed by X-ray diffraction, scanning electron microscope and high resolution transmission electron microscope. The BiOBr0.5I0.5/MXene Ti3C2Tx (BOT-5) composite was achieved through a simple synthesis process and its heterostructure was determined by efficient characterizations. Through degradation experiments, the improved photocatalytic degradation property for Rhodamine B (RhB) and phenol of BOT-5 was observed and its excellent chemical stability was also verified meanwhile. The photocatalytic mechanism of BOT-5 was further explored in this work. Through efficient experimental strategies, the enhanced carrier photocatalysis of BOT-5 together with its inhibited extinction photocatalysis was verified. Benefiting from the enhanced carrier photocatalysis of BOT-5, more superoxide and hydroxyl radicals were generated and supported its enhanced photocatalytic degradability.
This work is supported by National Natural Science Foundation of China (Grant No. 51702270), the Scientific Research Starting Project of SWPU (Grant No. 2015QHZ001), Young Scholars Development Fund of SWPU (Grant No. 201499010100), Open Fund (Grant No. 201601) of State Key Laboratory of Physical Chemistry of Solid Surfaces (Xiamen University).
- 4.M. Yan, L. Wen, Z. Wang, D. Cao, Y. Fang, L. Yong, Building of anti-restack 3D BiOCl hierarchitecture by ultrathin nanosheets towards enhanced photocatalytic activity. Appl. Catal. B 176, 331–337 (2015)Google Scholar
- 19.A. Ali, A. Belaidi, S. Ali, M. Helal, K. Mahmoud, Transparent and conductive Ti3C2Tx (MXene) thin film fabrication by electrohydrodynamic atomization technique. J. Mater. Sci.: Mater. Electron. 27, 5440–5445 (2016)Google Scholar
- 20.C. Shi, M. Beidaghi, M. Naguib, O. Mashtalir, Y. Gogotsi, S. Billinge, Structure of nanocrystalline Ti3C2 MXene using atomic pair distribution function. Phys. Rev. Lett. 29, 1211–1215 (2014)Google Scholar
- 29.Y. Wu, H. Wang, W. Tu, Y. Liu, Y. Tan, X. Yuan, J. Chew, Quasi-polymeric construction of stable perovskite-type LaFeO3/g-C3N4 heterostructured photocatalyst for improved Z-scheme photocatalytic activity via solid p-n heterojunction interfacial effect. J. Hazard. Mater. 347, 412–422 (2018)CrossRefGoogle Scholar
- 38.C. Jing, B. Xu, H. Lin, B. Luo, S. Chen, Chemical etching preparation of BiOI/BiOBr heterostructures with enhanced photocatalytic properties for organic dye removal. Chem. Eng. J. 185–186, 91–99 (2012)Google Scholar