skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Enhanced Ferroelectric and Visible-Light Photoelectric Properties in Multiferroic KBiFe 2 O 5 via Pressure-Induced Phase Transition

Authors:
 [1];  [2];  [1];  [3];  [1];  [4];  [5]
  1. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203 P. R. China
  2. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203 P. R. China, Department of Physics, Fudan University, Shanghai 200433 P. R. China
  3. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203 P. R. China, State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012 P. R. China
  4. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203 P. R. China, High Pressure Synergetic Consortium (HPSynC), Geophysical Laboratory, Carnegie Institution of Washington, Argonne IL 60439 USA
  5. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 P. R. China
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1401269
Grant/Contract Number:
FG02-99ER45775; AC02-06CH11357
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Advanced Electronic Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 3; Related Information: CHORUS Timestamp: 2017-10-20 16:37:52; Journal ID: ISSN 2199-160X
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
United States
Language:
English

Citation Formats

Zhang, Ganghua, Liu, Fengliang, Gu, Tingting, Zhao, Yongsheng, Li, Nana, Yang, Wenge, and Feng, Shouhua. Enhanced Ferroelectric and Visible-Light Photoelectric Properties in Multiferroic KBiFe 2 O 5 via Pressure-Induced Phase Transition. United States: N. p., 2017. Web. doi:10.1002/aelm.201600498.
Zhang, Ganghua, Liu, Fengliang, Gu, Tingting, Zhao, Yongsheng, Li, Nana, Yang, Wenge, & Feng, Shouhua. Enhanced Ferroelectric and Visible-Light Photoelectric Properties in Multiferroic KBiFe 2 O 5 via Pressure-Induced Phase Transition. United States. doi:10.1002/aelm.201600498.
Zhang, Ganghua, Liu, Fengliang, Gu, Tingting, Zhao, Yongsheng, Li, Nana, Yang, Wenge, and Feng, Shouhua. Fri . "Enhanced Ferroelectric and Visible-Light Photoelectric Properties in Multiferroic KBiFe 2 O 5 via Pressure-Induced Phase Transition". United States. doi:10.1002/aelm.201600498.
@article{osti_1401269,
title = {Enhanced Ferroelectric and Visible-Light Photoelectric Properties in Multiferroic KBiFe 2 O 5 via Pressure-Induced Phase Transition},
author = {Zhang, Ganghua and Liu, Fengliang and Gu, Tingting and Zhao, Yongsheng and Li, Nana and Yang, Wenge and Feng, Shouhua},
abstractNote = {},
doi = {10.1002/aelm.201600498},
journal = {Advanced Electronic Materials},
number = 3,
volume = 3,
place = {United States},
year = {Fri Feb 10 00:00:00 EST 2017},
month = {Fri Feb 10 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1002/aelm.201600498

Save / Share:
  • Composites comprised of two semiconducting materials with suitable band gaps and band positions have been reported to be effective at enhancing photocatalytic activity in the visible light region of the electromagnetic spectrum. Here, we report the synthesis, complete structural and physical characterizations, and photocatalytic performance of a series of semiconducting oxide composites. UV light active tantalum oxide (Ta2O5) and visible light active tantalum oxynitride (TaON) and tantalum nitride (Ta 3N 5) were synthesized, and their composites with Bi 2O 3 were prepared in situ using benzyl alcohol as solvent. The composite prepared using equimolar amounts of Bi 2O 3 andmore » Ta 2O 5 leads to the formation of the ternary oxide, bismuth tantalate (BiTaO 4) upon calcination at 1000 °C. The composites and single phase bismuth tantalate formed were characterized by powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), Brunauer–Emmett–Teller (BET) surface area measurement, scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV–Vis diffuse reflectance spectroscopy, and photoluminescence. The photocatalytic activities of the catalysts were evaluated for generation of hydrogen using aqueous methanol solution under visible light irradiation (λ ≥ 420 nm). The results show that as-prepared composite photocatalysts extend the light absorption range and restrict photogenerated charge-carrier recombination, resulting in enhanced photocatalytic activity compared to individual phases. The mechanism for the enhanced photocatalytic activity for the heterostructured composites is elucidated based on observed activity, band positions calculations, and photoluminescence data.« less
  • The results of x-ray diffraction studies on 0.65Bi(Ni{sub 1/2}Ti{sub 1/2})O{sub 3}-0.35PbTiO{sub 3} solid solution poled at various electric fields are presented. After poling, significant value of planar electromechanical coupling coefficient (k{sub P}) is observed for this composition having cubic structure in unpoled state. The cubic structure of 0.65Bi(Ni{sub 1/2}Ti{sub 1/2})O{sub 3}-0.35PbTiO{sub 3} transforms to monoclinic structure with space group Pm for the poling field ≥5 kV/cm. Large c-axis microscopic lattice strain (1.6%) is achieved at 30 kV/cm poling field. The variation of the c-axis strain and unit cell volume with poling field shows a drastic jump similar to that observed for strainmore » versus electric field curve in (1 − x)Pb(Mg{sub 1/3}Nb{sub 2/3}) O{sub 3}-xPbTiO{sub 3} and (1 − x)Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}-xPbTiO{sub 3}.« less
  • A crystal chemical study has been carried out for the ternary systems Li/sub 2/O-M/sub 2/O/sub 5/-(M'O/sub 2/)/sub 2/ (M = Nb, M' = Ti; M = Ta, M' = Sn), in order to characterize and delimit the extension of domains of solid solutions in the vicinity of LiNbO/sub 3/ and LiTaO/sub 3/. The nature of the nonstoichiometry within these regions of solid solution has been found to be of a cationic excess or deficit. No evidence for anionic deficit has been found in this study. The ferroelectric Curie temperature T/sub C/ decreases as the composition deviates from LiNbO/sub 3/ ormore » LiTaO/sub 3/. The decline in T/sub C/ has been interpreted on the basis of the electrostatic interactions resulting from either cationic excess or deficit.« less