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- Title
Kinetics and mechanism of photocatalytic degradation of rhodamine B on nanorod bismuth ferrite perovskite prepared by hydrothermal method.
- Authors
Nguyen, Kien Trung; Nguyen, Chi Thi Ha; Pham, Chuc Ngoc; Duong, Lim Thi; Nguyen, Bac Quang; Le, Hung Bao; Nguyen, Mai Vu Ngoc; Dao, Nhiem Ngoc
- Abstract
Bismuth ferrite perovskite BiFeO3 (BFO) being used for many applications was prepared by hydrothermal method at various heating temperatures and duration. X-ray diffractometry, scanning electronic microscopy, and high-resolution transmission electron microscopy (HR-TEM) displayed the optimum nanorod structure of BFO samples after being heated at 160 °C for 12 h in the autoclave (BFO*). Additionally, the morphology of BFO* was also analyzed by energy-dispersive spectroscopy and the nitrogen adsorption isotherms. The photocatalytic degradation of rhodamine B (RhB) with the presence of BFO* under visible light demonstrated the hypsochromic shifts of maximum absorbance to the blue region over time due to the N-deethylations. BFO efficiently decomposed RhB under various reaction conditions. About 77% of the initial RhB was degraded after 45 min at 30 °C and most of the RhB vanished after 60 min at 45 °C. The RhB degradation with BFO* exhibited the pseudo-first-order kinetics and the apparent activation energy of 57.94 kJ mol−1. After being recycled five times, the degradation efficiency of BFO* displayed unremarkable changes with good stability of materials. From the analysis of generated intermediates by high-performance liquid chromatography coupled with ESI ionized mass spectroscopy, the RhB degradation process was also given.
- Subjects
RHODAMINE B; BISMUTH iron oxide; PHOTODEGRADATION; NANORODS; ELECTROSPRAY ionization mass spectrometry; HIGH performance liquid chromatography; PEROVSKITE
- Publication
Research on Chemical Intermediates, 2023, Vol 49, Issue 1, p57
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-022-04877-5