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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