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Photocatalytic water splitting for hydrogen generation on cubic, orthorhombic, and tetragonal KNbO3 microcubes
Zhang, Tingting1,3; Zhao, Kun1; Yu, Jiaguo4; Jin, Jian4; Qi, Yang3; Li, Huiquan2; Hou, Xinjuan2; Liu, Gang1
2013
Source PublicationNANOSCALE
Volume5Issue:18Pages:8375-8383
AbstractPotassium niobate (KNbO3) microcubes with orthorhombic and tetragonal phases were hydrothermally prepared and characterized by powder X-ray diffraction, nitrogen adsorption-desorption, micro-Raman spectroscopy, Fourier transform infrared spectroscopy, diffuse reflectance UV-visible spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and high-resolution transmission electron microscopy. The photoreactivity of the as-prepared KNbO3 samples was evaluated regarding the hydrogen evolution from aqueous methanol under UV, and the results were compared with that of cubic KNbO3 microcubes. The photocatalytic reactivity was shown to be phase-dependent, following the order cubic > orthorhombic > tetragonal. Insight into the phase-dependent photocatalytic properties was gained by first-principles density functional calculations. The best photocatalytic performance of cubic KNbO3 is ascribed to it having the highest symmetry in the bulk structure and associated unique electronic structure. Further, the surface electronic structure plays a key role leading to the discrepancy in photoreactivity between orthorhombic and tetragonal KNbO3. The results from this study are potentially applicable to a range of perovskite-type mixed metal oxides useful in water splitting as well as other areas of heterogeneous photocatalysis.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI
Language英语
WOS KeywordVISIBLE-LIGHT ; H-2 EVOLUTION ; 001 FACETS ; TIO2 ; PERFORMANCE ; ANATASE ; NANOPARTICLES ; NANOSHEETS ; MICROSPHERES ; COMPOSITES
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000323521000012
Citation statistics
Cited Times:83[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13666
Collection研究所(批量导入)
Affiliation1.Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Northeastern Univ, Sch Sci, Inst Mat Phys & Chem, Shenyang 110004, Peoples R China
4.Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Tingting,Zhao, Kun,Yu, Jiaguo,et al. Photocatalytic water splitting for hydrogen generation on cubic, orthorhombic, and tetragonal KNbO3 microcubes[J]. NANOSCALE,2013,5(18):8375-8383.
APA Zhang, Tingting.,Zhao, Kun.,Yu, Jiaguo.,Jin, Jian.,Qi, Yang.,...&Liu, Gang.(2013).Photocatalytic water splitting for hydrogen generation on cubic, orthorhombic, and tetragonal KNbO3 microcubes.NANOSCALE,5(18),8375-8383.
MLA Zhang, Tingting,et al."Photocatalytic water splitting for hydrogen generation on cubic, orthorhombic, and tetragonal KNbO3 microcubes".NANOSCALE 5.18(2013):8375-8383.
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