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Photocatalytic Cr(VI) reduction by mixed metal oxide derived from ZnAl layered double hydroxide
https://orcid.org/0000-0002-0942-4366
AbstractMixed metal oxide (MMO) is one of the most important photocatalyts intensively investigated for water remediation. In this study, ZnO/ZnAl2O4 (ZnAl-MMO) nanocomposite was readily prepared via one-step calcination of ZnAl-layered double hydroxide (ZnAl-LDH) at 900°C.·The obtained MMO composite was thoroughly characterized by powder X-ray diffraction (XRD), Scanning electron microscopy (SEM), High-resolution transmission electron microscopy (HRTEM), UV–Vis diffuse reflectance spectroscopy (DRS). ZnAl-MMO was composed of nano-scaled ZnO and ZnAl2O4 crystal grains of high crystallinity and exhibited strong UV light adsorption with a well-developed interface between the two components of the composite. ZnAl-MMO showed high photocatalytic Cr(VI) reduction activity under UV light irradiation and its rate constant was as high as 0.8134h−1. The photoreduction activity of ZnAl-MMO photocatalyt was ascribed to the synergistic effect between two components of the nanocomposite.
Graphical abstract
HighlightsZnAl-MMO was readily prepared via calcination of ZnAl-LDH at 900°C.ZnAl-MMO showed high photocatalytic Cr(VI) reduction activity under UV light irradiation.The high activity could be ascribed to the synergistic effect between two components.
Photocatalytic Cr(VI) reduction by mixed metal oxide derived from ZnAl layered double hydroxide
https://orcid.org/0000-0002-0942-4366
AbstractMixed metal oxide (MMO) is one of the most important photocatalyts intensively investigated for water remediation. In this study, ZnO/ZnAl2O4 (ZnAl-MMO) nanocomposite was readily prepared via one-step calcination of ZnAl-layered double hydroxide (ZnAl-LDH) at 900°C.·The obtained MMO composite was thoroughly characterized by powder X-ray diffraction (XRD), Scanning electron microscopy (SEM), High-resolution transmission electron microscopy (HRTEM), UV–Vis diffuse reflectance spectroscopy (DRS). ZnAl-MMO was composed of nano-scaled ZnO and ZnAl2O4 crystal grains of high crystallinity and exhibited strong UV light adsorption with a well-developed interface between the two components of the composite. ZnAl-MMO showed high photocatalytic Cr(VI) reduction activity under UV light irradiation and its rate constant was as high as 0.8134h−1. The photoreduction activity of ZnAl-MMO photocatalyt was ascribed to the synergistic effect between two components of the nanocomposite.
Graphical abstract
HighlightsZnAl-MMO was readily prepared via calcination of ZnAl-LDH at 900°C.ZnAl-MMO showed high photocatalytic Cr(VI) reduction activity under UV light irradiation.The high activity could be ascribed to the synergistic effect between two components.
Photocatalytic Cr(VI) reduction by mixed metal oxide derived from ZnAl layered double hydroxide
https://orcid.org/0000-0002-0942-4366
AbstractMixed metal oxide (MMO) is one of the most important photocatalyts intensively investigated for water remediation. In this study, ZnO/ZnAl2O4 (ZnAl-MMO) nanocomposite was readily prepared via one-step calcination of ZnAl-layered double hydroxide (ZnAl-LDH) at 900°C.·The obtained MMO composite was thoroughly characterized by powder X-ray diffraction (XRD), Scanning electron microscopy (SEM), High-resolution transmission electron microscopy (HRTEM), UV–Vis diffuse reflectance spectroscopy (DRS). ZnAl-MMO was composed of nano-scaled ZnO and ZnAl2O4 crystal grains of high crystallinity and exhibited strong UV light adsorption with a well-developed interface between the two components of the composite. ZnAl-MMO showed high photocatalytic Cr(VI) reduction activity under UV light irradiation and its rate constant was as high as 0.8134h−1. The photoreduction activity of ZnAl-MMO photocatalyt was ascribed to the synergistic effect between two components of the nanocomposite.
Graphical abstract
HighlightsZnAl-MMO was readily prepared via calcination of ZnAl-LDH at 900°C.ZnAl-MMO showed high photocatalytic Cr(VI) reduction activity under UV light irradiation.The high activity could be ascribed to the synergistic effect between two components.
Photocatalytic Cr(VI) reduction by mixed metal oxide derived from ZnAl layered double hydroxide
Yuan, Xiaoya (author) / Jing, Qiuye (author) / Chen, Jingtao (author) / Li, Li (author)
Applied Clay Science ; 143 ; 168-174
2017-03-24
7 pages
Article (Journal)
Electronic Resource
English