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Magnetically separable Ag/AgBr/NiFe2O4 composite as a highly efficient visible light plasmonic photocatalyst.

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Title: Magnetically separable Ag/AgBr/NiFe2O4 composite as a highly efficient visible light plasmonic photocatalyst.
Authors: Ge, Ming1,2 geminggena@163.com, Liu, Wei1, Hu, Xin-Rong1, Li, Zhen-Lu1
Source: Journal of Physics & Chemistry of Solids. Oct2017, Vol. 109, p1-8. 8p.
Subjects: Composite materials, Photocatalysts, Electromagnetic waves, Surface plasmon resonance, Magnetic fields, Electromagnetic theory
Abstract: A magnetic Ag/AgBr/NiFe 2 O 4 plasmonic photocatalyst was firstly prepared by coupling a hydrothermal route with a solvothermal method. The as-synthesized Ag/AgBr/NiFe 2 O 4 was characterized by XRD, XPS, FE-SEM, UV–vis DRS, PL and BET surface area. Under visible light irradiation, the resulting Ag/AgBr/NiFe 2 O 4 exhibited a higher photocatalytic activity for rhodamine B (RhB) degradation compared with Ag/AgBr, which was ascribed to the heterostructured Ag/AgBr/NiFe 2 O 4 and the surface plasmon resonance (SPR) effect of Ag nanoparticles. Moreover, the Ag/AgBr/NiFe 2 O 4 plasmonic photocatalyst can be recovered and recycled by a magnetic field along with good stability. A plausible mechanism is also proposed via active species trapping experiments, which indicating that the superoxide radicals (O 2 −• ) are the main reactive oxygen species for RhB degradation in Ag/AgBr/NiFe 2 O 4 suspension under visible light. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:A magnetic Ag/AgBr/NiFe 2 O 4 plasmonic photocatalyst was firstly prepared by coupling a hydrothermal route with a solvothermal method. The as-synthesized Ag/AgBr/NiFe 2 O 4 was characterized by XRD, XPS, FE-SEM, UV–vis DRS, PL and BET surface area. Under visible light irradiation, the resulting Ag/AgBr/NiFe 2 O 4 exhibited a higher photocatalytic activity for rhodamine B (RhB) degradation compared with Ag/AgBr, which was ascribed to the heterostructured Ag/AgBr/NiFe 2 O 4 and the surface plasmon resonance (SPR) effect of Ag nanoparticles. Moreover, the Ag/AgBr/NiFe 2 O 4 plasmonic photocatalyst can be recovered and recycled by a magnetic field along with good stability. A plausible mechanism is also proposed via active species trapping experiments, which indicating that the superoxide radicals (O 2 −• ) are the main reactive oxygen species for RhB degradation in Ag/AgBr/NiFe 2 O 4 suspension under visible light. [ABSTRACT FROM AUTHOR]
ISSN:00223697
DOI:10.1016/j.jpcs.2017.05.008