Large area (9 × 9 cm2) electrostatically sprayed nanocrystalline zincite thin films for hydrogen production application

Title
Large area (9 × 9 cm2) electrostatically sprayed nanocrystalline zincite thin films for hydrogen production application
Authors
라젠드라채상윤마네강그리한성환주오심
Keywords
ZnFe2O4 films; Hydrogen production; Crystal structure; Surface morphology; Optical absorption analysis
Issue Date
2010-07
Publisher
International journal of hydrogen energy
Citation
VOL 35, NO 13, 6549-6553
Abstract
Synthesis of single phase nanocrystalline zinc ferrite (zincite) thin films that provides high surface area for active redox reactions is reported. Electrostatic spray method is employed for obtaining these ferrite films onto a stainless steel substrate of 9 × 9 ㎠ area using zinc acetate and iron nitrate precursor solutions, mixed in 1:1.5 proportions in triply-distilled water. Single zinc ferrite phase in films, confirmed from the X-ray diffraction pattern, reveals the aggregation of several nanometer-sized spherical grains. About 4 nm average roughness is obtained from the 3D AFM image. Zinc ferrite film deposited onto a glass substrate shows both direct (2.96 eV) and indirect (1.92 eV) band gap energies. Hydrophilic behavior that might facilitate easy reaction kinetics in a water splitting process is noticed. Finally, 450 mL/h hydrogen production rate is confirmed when zinc ferrite film electrode was used as an anode in presence of Pt mesh as a cathode.
URI
http://pubs.kist.re.kr/handle/201004/37705
ISSN
0360-3199
Appears in Collections:
KIST Publication > Article
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