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- Title
Synthesis and characterization of heterogeneous catalyst EDTMPA-Cu-LDH and study of the mechanism of visible-light photocatalytic degradation of Rhodamine B.
- Authors
Huali Zhang; Jiaxin Zhang; Hanjun Wu; Yi Pan; Yan Xia; Zhiquan Pan; Dongshen Wang
- Abstract
In this work, heterogeneous catalysts of Cu(II)-ethylenediamine tetramethylene phosphonic acid (Cu(II)-EDTMPA) complex intercalated layered double hydroxides (EDTMPA-Cu-LDH) was synthesized by co-precipitation method for visible-light photocatalytic degradation of Rhodamine B (RhB). The synthesized catalysts were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The results indicated that the EDTMPA-Cu-LDH showed a typical layered structure. After intercalation, layer spacing increased from 7.96 to 12.21 Å. The catalysts showed excellent catalytic activity for the degradation of RhB in visible light. The optimum conditions for RhB degradation were confirmed to be natural initial pH value 5.85, 10 mmol L-1 of RhB concentration, 7 mmol L-1 of H2O2 concentration, and 0.3 g L-1 of catalyst dosage. The maximum degradation efficiency was 98.2% under the optimum conditions and excellent reusability and stability were obtained in the regeneration test. In the end, the reaction mechanism that might exist in the heterogeneous UV-Fenton system was proposed.
- Subjects
HETEROGENEOUS catalysts; HYDROXIDES; LAYERED double hydroxides; X-ray photoelectron spectroscopy; CATALYTIC activity; REFLECTANCE spectroscopy
- Publication
Desalination & Water Treatment, 2020, Vol 196, p177
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2020.25938