A New Photocatalyst Bismuth Oxo Citrate: Synthesis, Characterization, and Photocatalytic Performance

作者：Najdanovic Slobodan M^*; Petrovic Milica M; Slipper Ian J; Kostic Milos M; Prekajski Marija D; Mitrovic Jelena Z; Bojic Aleksandar Lj

来源：Water Environment Research, 2018, 90(8): 719-728.

DOI：10.2175/106143017X15131012152924

• bismuth oxo citrate
• photocatalytic process
• Reactive Blue 19
• decolorization
• kinetics

A new photocatalyst bismuth oxo citrate was synthesized by facile precipitation process with calcination at 200 degrees C. The photocatalyst was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, N-2 sorptometry, and elemental analysis. Morphologically, it is composed of polyhedral particles with different, irregular shapes and sizes. The specific surface area (SSA) of the photocatalyst was 8.92 m(2) g(-1). It showed very good photocatalytic performance and reusability. Total decolorization of Reactive Blue 19 (RB19) was achieved in less than 10 minutes, which is much faster in comparison with TiO2 P25. Also, bismuth oxo citrate showed higher photocatalytic activity than other photocatalysts based on bismuth compounds reported by other authors. Optimal photocatalysis parameters were pH(2) and photocatalyst dose of 250 mg dm(-3). The decolorization rate was found to decrease as initial dye concentration increased. The photocatalytic data best fitted to L-H kinetic model with pseudo-first order reaction rate. Chrastil diffusion model showed that diffusion has not influence on the process.

• 出版日期2018-8-1