Abstract
Submicron-sized mesoporous nickel ferrite (NiFe2O4) spheres were prepared by an aerosol spray pyrolysis method using Pluronic F127 as a structure-directing agent, and their photocatalytic performance for hydrogen (H2) evolution was examined in an aqueous MeOH solution by visible light irradiation (λ > 420 nm). The structure of the spherical mesoporous nickel ferrites was studied by transmission electron microscopy, powder X-ray diffraction, and N2 adsorption-desorption isotherm measurements. Mesoporous NiFe2O4 spheres of high specific surface area (278 m2 g-1) with a highly crystalline framework were prepared by adjusting the amount of structure-directing agent and the calcining condition. High photocatalytic activity of mesoporous NiFe2O4 for H2 evolution from water with methanol was achieved due to the combination of high surface area and high crystallinity of the nickel ferrites.
Original language | English |
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Pages (from-to) | 2588-2594 |
Number of pages | 7 |
Journal | ACS Sustainable Chemistry and Engineering |
Volume | 2 |
Issue number | 11 |
DOIs | |
State | Published - 3 Nov 2014 |
Bibliographical note
Publisher Copyright:© 2014 American Chemical Society.
Keywords
- Crystallinilty
- Hydrogen evolution
- Metal oxide sphere
- Nickel ferrite
- Photocatalysis
- Ramp rate
- Surface area