Abstract The aim of this study was to investigate the photocatalytic activity of polycrystalline phases of bismuth vanadate of formula Bi13B1-2xVx PxO20.95+2x with x = 0, 0.1, 0.2, 0.25, 0.4 and 0.5. The catalysts were prepared by solid state method at 700 °C and were further characterized using a variety characterization techniques such X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray energy dispersion spectroscopy (EDS). The photocatalytic experiments were carried out using rhodamine B (RhB) as a model pollutant; the UV–visible spectrometry was used to analyze the evolution of dye degradation. The obtained photocatalytic results clearly indicated that all as-prepared photocatalysts exhibited higher photocatalytic activities than that of the pure Bi13B1-2xVx PxO20.95+2x with x = 0. The best degradation performance is obtained when using the Bi13B1-2xVx PxO20.95+2x with x = 0.2 catalyst. Moreover, the complete degradation of RhB can be achieved after 180 min of UV irradiation in the presence of this catalyst.

中文翻译：

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Bi13B1-2xVxPxO20.95+2x (0 ≤ x ≤ 0.5) 的结构和光催化行为研究

摘要 本研究的目的是研究式Bi13B1-2xVx PxO20.95+2x 的钒酸铋多晶相的光催化活性，其中x = 0、0.1、0.2、0.25、0.4 和0.5。催化剂在 700 °C 下通过固态法制备，并使用各种表征技术进一步表征，如 X 射线衍射 (XRD)、傅里叶变换红外光谱 (FTIR)、扫描电子显微镜 (SEM) 和 X 射线能量色散光谱（EDS）。以罗丹明B（RhB）为模型污染物进行光催化实验；紫外-可见光谱法用于分析染料降解的演变。获得的光催化结果清楚地表明，所有制备的光催化剂都表现出比纯 Bi13B1-2xVx PxO20 更高的光催化活性。95+2x，x = 0。当使用 Bi13B1-2xVx PxO20.95+2x 和 x = 0.2 催化剂时获得最佳降解性能。此外，在这种催化剂的存在下，在紫外线照射 180 分钟后，可以实现 RhB 的完全降解。