In situ preparation of Bi2WO6/CAU-17 photocatalyst with excellent photocatalytic activity for dye degradation

As an organic-inorganic hybrid material, metal organic frameworks (MOFs) has a great development prospect in the field of photocatalysis. Herein, the in situ growth of Bi-based MOF (CAU-17) on Bi2WO6 was utilized to obtain Bi2WO6/CAU-17 photocatalyst by a simple solvothermal transformation method. Bi2WO6 can be used both as template and Bi source. The structure and morphology of Bi2WO6/CAU-17 composites were characterized by X-ray diffraction patterns, X-ray photoelectron spectroscopy, Fourier transform infrared spectra, UV-vis diffuse reflectance absorption spectra and scanning electronic microscopy, and transmission electron microscope. The results showed Bi2WO6/CAU-17 composites were successfully constructed by growing CAU-17 in situ on Bi2WO6. Compared with pure Bi2WO6 and CAU-17, Bi2WO6/CAU-17-1 h composite exhibited excellent photocatalytic activity for the degradation of Rhodamine B, and its rate constant was 0.02083 min(-1). In addition, the quantum yield and space time yield of the obtained photocatalyst were 2.56 x 10(-6) molecules/photon and 1.28 x 10(-7) molecules/photon center dot mg, respectively. Bi2WO6/CAU-17 also exhibits better values of the modified FOM (figure of merit). This method provides a potential opportunity for the development of in situ growth of similar MOF materials for water treatment and other possible applications in the future.

Automated summary

In this study, Bi-based MOFs (CAU-17) were successfully grown in situ on Bi2WO6 using a solvothermal transformation method to obtain the Bi2WO6/CAU-17 photocatalyst. The composite exhibited excellent photocatalytic activity for the degradation of Rhodamine B, as well as high quantum yield and space time yield. This method presents a potential opportunity for the in situ growth of similar MOF materials in the future.