Abstract
Bi2WO6 samples were prepared by a hydrothermal method using Bi(NO3)3·5H2O and Na2WO4·2H2O as raw materials. X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), Raman and Brunauer–Emmett–Teller (BET) were employed for sample characterization. The photocatalytic activity of the samples was evaluated by the degradation of Rhodamine B under visible-light irradiation. The photocatalytic activity of Bi2WO6, as well as the effect of varying HNO3 concentrations on the morphologies of Bi2WO6, was investigated. The HNO3 concentration significantly affected the structure and morphology of the Bi2WO6. The photocatalytic performance varied with the structure, morphology, and surface area of the Bi2WO6 samples. The results indicated that the H10 sample exhibits uniform morphology and excellent photocatalytic performance; using this sample, the degradation of Rhodamine B reached 96% in 90 min under visible-light irradiation.
Highlights
Over the past decades, photocatalysis has attracted significant attention for the effective utilization of solar energy and the reduction of environmental pollution [1,2,3,4,5,6]
The results reveal that the HNO3 concentration affects the structure, morphology, and photocatalytic performance of the samples
The morphology of Bi2 WO6 becomes more compact with the increasing HNO3 concentration, and the BET surface area was consistent with the scanning electron microscopy (SEM) results, while a further increase in the HNO3 concentration resulted in the considerable aggregation of Bi2 WO6
Summary
Photocatalysis has attracted significant attention for the effective utilization of solar energy and the reduction of environmental pollution [1,2,3,4,5,6]. Methods, and the effect on Bi2 WO6 basic sheet units during the synthesis process has been seldom most of the studies focus on the self-assembly of Bi2WO6 sheet units using various reported,especially concerning HNO3 concentrations. This study investigated the effect methods, and the effect on Bi2WO6 basic sheet units during the synthesis process has been seldom of varying HNO3 concentrations on the structural morphologies and properties of the Bi2 WO6 reported, especially concerning HNO3 concentrations. X-ray diffraction (XRD), field-emission scanning varying HNO3 concentrations on the structural morphologies and properties of the Bi2WO6 electron microscopy (FESEM), as well as (XRD), Ramanfield-emission were employed photocatalyst, as well as on Brunauer–Emmett–Teller the formation mechanism. B was utilized for evaluating the photocatalytic properties of prepared at different HNO3 concentrations
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