A Red Long-Lasting Phosphorescence Material Gd9.33(SiO4)6O2:Sm3+and Effect of Oxygen Vacancies on Its Performance

2013 ◽  
Vol 2 (9) ◽  
pp. R161-R164 ◽  
Author(s):  
Gen Li ◽  
Yuhua Wang ◽  
Shaochun Han ◽  
Wei Zeng ◽  
Wenbo Chen ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Effect Of Oxygen

Effect of oxygen vacancies and crystal symmetry on piezocatalytic properties of Bi2WO6 ferroelectric nanosheets for wastewater decontamination

2021 ◽  
Author(s):  
Zihan Kang ◽  
Enzhu Lin ◽  
Ni Qin ◽  
Jiang Wu ◽  
Baowei Yuan ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Oxygen Vacancies ◽  
Mechanical Energy ◽  
Crystal Symmetry ◽  
Characteristic P ◽  
Novel Technique ◽  
Effect Of Oxygen

Piezocatalysis emerged as a novel technique to make use of mechanical energy in dealing with organic pollutants in wastewater. In this work, the ferroelectric Bi2WO6 (BWO) nanosheets with a characteristic...

Electrical property effect of oxygen vacancies in the heterojunction of LaGaO 3 / SrTiO 3

2017 ◽  
Vol 26 (3) ◽  
pp. 037101
Author(s):  
Fu-Ning Wang ◽  
Ji-Chao Li ◽  
Xin-Miao Zhang ◽  
Han-Zhang Liu ◽  
Jian Liu ◽  
...  
Keyword(s):  
Electrical Property ◽  
Oxygen Vacancies ◽  
Effect Of Oxygen

The Effect of Oxygen Vacancies on the Dielectric Responses of BaTiO3 Based Ceramics in the Ultra-Wide Frequency Range

2011 ◽  
Vol 485 ◽  
pp. 15-18 ◽  
Author(s):  
Youn Kyu Choi ◽  
Takuya Hoshina ◽  
Hiroaki Takeda ◽  
Jong Min Oh ◽  
Takaaki Tsurumi
Keyword(s):  
Oxygen Vacancy ◽  
Oxygen Vacancies ◽  
Wide Frequency Range ◽  
Annealing Conditions ◽  
Mass Fractions ◽  
Xrd Patterns ◽  
Effect Of Oxygen ◽  
Lattice Hardening ◽  
Dipole Polarization ◽  
Ionic Polarization

The effect of oxygen vacancies and their migrations on the dielectric responses of BaTiO3 (BT) ceramics and (Ba, Ca)(Ti, Zr)O3 (BCTZ) ceramics was studied using wideband dielectric spectroscopy. Both dipole and ionic polarization of BT ceramics after annealing in a reducing atmosphere markedly decreased. To elucidate the decrease of dipole and ionic polarization, we observed the domain width and the crystal structure of BT ceramics annealed in different PO2. The mass fractions of constituted phases in 90o domain were calculated using the refinement of XRD patterns to explain the degradation of ionic polarization by oxygen vacancies. From the results above, we judged that the decrease of dipole polarization was due to the domain wall clamping by oxygen vacancies, while that of ionic polarization was attributable to the lattice hardening by the incorporation of oxygen vacancies into the BT lattice. In the case of BCTZ ceramics, dipole polarization showed the same way as BT ceramics with annealing conditions but the ionic polarization was independent of PO2 in annealing because of anti-reducing behavior of BCTZ ceramics. On the basis of the effect of oxygen vacancy in BT ceramics and BCTZ ceramics, we could clarify the oxygen vacancy migration in BCTZ ceramics under high direct-current voltage (DCV).

The effect of oxygen vacancies in ZnO at an Au/ZnO interface on its catalytic selective oxidation of glycerol

2019 ◽  
Vol 377 ◽  
pp. 271-282 ◽  
Author(s):  
Guandong Wu ◽  
Gengqiang Zhao ◽  
Jianhua Sun ◽  
Xingzhong Cao ◽  
Yufei He ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Oxygen Vacancies ◽  
Effect Of Oxygen ◽  
Catalytic Selective Oxidation

scholarly journals Role of precursors mixing sequence on the properties of CoMn2O4 cathode materials and their application in pseudocapacitor

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Bhaskar Pattanayak ◽  
Firman Mangasa Simanjuntak ◽  
Debashis Panda ◽  
Chih - Chieh Yang ◽  
Amit Kumar ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Specific Capacitance ◽  
Oxygen Vacancies ◽  
Maximum Energy ◽  
Spinel Compounds ◽  
Oxidation Reduction ◽  
Tetrahedral Crystal ◽  
Effect Of Oxygen ◽  
Ion Intercalation ◽  
Mixing Sequence

AbstractIn this study, the effect of oxygen vacancy in the CoMn2O4 on pseudocapacitive characteristics was examined, and two tetragonal CoMn2O4 spinel compounds with different oxygen vacancy concentrations and morphologies were synthesized by controlling the mixing sequence of the Co and Mn precursors. The mixing sequence was changed; thus, morphologies were changed from spherical nanoparticles to nanoflakes and oxygen vacancies were increased. Electrochemical studies have revealed that tetragonal CoMn2O4 spinels with a higher number of oxygen vacancies exhibit a higher specific capacitance of 1709 F g−1 than those with a lower number of oxygen vacancies, which have a higher specific capacitance of 990 F g−1. Oxygen vacancies create an active site for oxygen ion intercalation. Therefore, oxidation–reduction reactions occur because of the diffusion of oxygen ions at octahedral/tetrahedral crystal edges. The solid-state asymmetric pseudocapacitor exhibits a maximum energy density of 32 Wh-kg−1 and an excellent cyclic stability of nearly 100%.

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