Low-temperature synthesis and characterisation of its photocatalytic properties of BiNbO4 by combustion method using polyvinyl alcohol
by Bac Quang Nguyen; Nhiem Ngoc Dao; Dung Trung Doan; Chuc Ngoc Pham; Chi Ha Thi Nguyen; Lim Thi Duong
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 13, No. 3/4, 2018

Abstract: BiNbO4 nanopowders were synthesised by polyvinyl alcohol sol-gel combustion method using freshly starting material Nb2O5. nH2O. The prepared samples were characterised by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy and thermal gravimetric and differential thermal analysis. The orthorhombic single phase calcined at 750°C for 2 h in the air was thoroughly studied with the highest photocatalytic properties in 25 nm average size. Methyl orange was used to evaluate the photocatalytic properties of BiNbO4under the visible light irradiation which was degraded by 98%. The regeneration ability of the catalyst was reduced by only 1.65% from 98.85% to 97.20% after using four-times without recovery.

Online publication date: Tue, 13-Nov-2018

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