Synthesis and properties of photocatalysts for the high degradation of sulfadiazine

Abstract

In this study, it was discovered for the first time that the BiOBr/Bi3.84W0.16O6.24 catalyst can efficiently degrade sulfadiazine (SDZ). Multiple techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis diffuse reflection spectroscopy (DRS) were applied to research the structures, morphology and photocatalytic properties of as-prepared samples. In addition, the effect of different synthesis pH environment and initial SDZ solution pH on the catalyst degradation efficiency were discussed. The BiOBr/Bi3.84W0.16O6.24 catalyst synthesized under the condition of pH = 7 exhibited excellent photocatalytic activity for photodegradation of SDZ of 91% within 120 min under simulated solar light irradiation. Also, the roles of the radical species have been studied, and the ·O2- and h+ were proved to dominate the photocatalytic process. Based on the experimental results, the photocatalytic mechanism was proposed.

Dual-Functional CuO-Decorated Bi3.84W0.16O6.24/Bi2WO6 Nanohybrids for Enhanced Electrochemical Hydrogen Evolution Reaction and Photocatalytic Cr(VI) Reduction Performance

“…XPS survey spectra in Figure a indicated that CuO/biphase-BW nanohybrids contained Bi, W, Cu, O, and C elements. The Bi 4f spectra of the CuO/biphase-BW exhibit two characteristic peaks located at 158.75 and 164.05 eV, which are assigned to Bi 3+ of Bi 4f 7/2 and Bi 4f 5/2 signals in bismuth tungstate. ,, The peaks at 34.86 and 36.95 eV correspond to the W 4f 7/2 and W 4f 5/2 signals of bismuth tungstate. Also, the position indicates a chemical state of +6.…”

“…With the addition of CuO, the increased surface area can facilitate abundant reactive sites 158.75 and 164.05 eV, which are assigned to Bi 3+ of Bi 4f 7/2 and Bi 4f 5/2 signals in bismuth tungstate. 16,34,35 The peaks at 34.86 and 36.95 eV correspond to the W 4f 7/2 and W 4f 5/2 signals of bismuth tungstate. Also, the position indicates a chemical state of +6.…”