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The nanocomposite of BiVO 4 -based material has been synthesized by one-step solvent method. The morphological, physical, chemical properties of the nanocomposite have been investigated. The results revealed that the surface area of BiVO 4 , BiVO 4 /SiO 2  and BiVO 4 /SiO 2 /GO was 11.13, 28.47 and 43.93 m 2 /g, respectively. The structural test by XRD proved that the nanocomposites were monoclinic phase of bismuth vanadate. Adsorption and photocatalytic degradation were two main mechanisms that strongly related to pollutant removal efficiency (i.e., methylene blue and phenol). The BiVO 4 /SiO 2 /GO nanocomposite obtained the greatest MB removal efficiency due to its high adsorption ability from high surface area, whereas the photocatalytic degradation was insignificant mechanism. In contrast, the relatively low adsorption ability of BiVO 4 /SiO 2 /GO nanocomposite was observed when the pollutant was phenol due to negative charge and high stability of phenoxide ions, then the photocatalytic degradation became the main mechanism for phenol removal. The phenol removal efficiency reached approximately 70% in 6 h with H 2 O 2  assistance. The combination of SiO 2  and GO improved the surface property of BiVO 4 -based photocatalyst, however the excessive combination ratio generated the excellent adsorbent material rather than the photocatalyst. Hence, the optimal combination ratio is essential to archive the greatest nanocomposite for photocatalytic application.

New insight into the photocatalytic degradation of organic pollutant over BiVO4/SiO2/GO nanocomposite