Charge compensation in RE3+ (RE = Eu, Gd) and M+ (M = Li, Na, K) co-doped alkaline earth nanofluorides obtained by microwave reaction with reactive ionic liquids leading to improved optical properties

2014 ◽  
Vol 2 (44) ◽  
pp. 9439-9450 ◽  
Author(s):  
C. Lorbeer ◽  
F. Behrends ◽  
J. Cybinska ◽  
H. Eckert ◽  
A.-V. Mudring
Keyword(s):  
Optical Properties ◽  
Ionic Liquids ◽  
Quantum Yield ◽  
Alkaline Earth ◽  
Charge Compensation ◽  
Luminescent Material ◽  
Microwave Reaction ◽  
Co Doped

Careful charge compensation in doubly doped alkaline earth nanofluorides enables a luminescent material with 199% quantum yield.

Optical properties of undoped, Eu3+ doped and Li+ co-doped Y2Hf2O7 nanoparticles and polymer nanocomposite films

2020 ◽  
Vol 7 (2) ◽  
pp. 505-518 ◽  
Author(s):  
Santosh K. Gupta ◽  
Jose P. Zuniga ◽  
Maya Abdou ◽  
P. S. Ghosh ◽  
Yuanbing Mao
Keyword(s):  
Optical Properties ◽  
Quantum Yield ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Asymmetry Ratio ◽  
Covalent Character ◽  
Co Doping ◽  
Concentration Asymmetry ◽  
Co Doped

Li+ co-doping of Y2Hf2O7:Eu3+ nanoparticles improve their quenching concentration, asymmetry ratio, quantum yield, and radioluminescence intensity due to the enhanced covalent character of Eu3+–O2− bonding.

Tunable Carbon Surface from Mono- to Multi-Metallic Single Atoms

2020 ◽  
Author(s):  
Weihong Lai ◽  
Heng Wang ◽  
Quan jiang ◽  
Zichao Yan ◽  
Hanwen Liu ◽  
...  
Keyword(s):  
Synergistic Effects ◽  
Structural Evolution ◽  
Charge Compensation ◽  
Catalytic Reactions ◽  
Single Atom ◽  
Carbon Surface ◽  
Hydrogen Electrode ◽  
Single Atoms ◽  
Mass Activity ◽  
Co Doped

<p>Herein, we develop a non-selective charge compensation strategy to prepare multi-single-atom doped carbon (MSAC) in which a sodium p-toluenesulfonate (PTS-Na) doped polypyrrole (S-PPy) polymer is designed to anchor discretionary mixtures of multiple metal cations, including iron (Fe<sup>3+</sup>), cobalt (Co<sup>3+</sup>), ruthenium (Ru<sup>3+</sup>), palladium (Pd<sup>2+</sup>), indium (In<sup>3+</sup>), iridium (Ir<sup>2+</sup>), and platinum (Pt<sup>2+</sup>) . As illustrated in Figure 1, the carbon surface can be tuned with different level of compositional complexities, including unary Pt<sub>1</sub>@NC, binary (MSAC-2, (PtFe)<sub>1</sub>@NC), ternary (MSAC-3, (PtFeIr)<sub>1</sub>@NC), quaternary (MSAC-4, (PtFeIrRu)<sub>1</sub>@NC), quinary (MSAC-5, (PtFeIrRuCo)<sub>1</sub>@NC), senary (MSAC-6, (PtFeIrRuCoPd)<sub>1</sub>@NC), and septenary (MSAC-7, (PtFeIrRuCoPdIn)<sub>1</sub>@NC) samples. The structural evolution of carbon surface dictates the activities of both ORR and HER. The senary MSAC-6 achieves the ORR mass activity of 18.1 A·mg<sub>metal</sub><sup>-1</sup> at 0.9 V (Vs reversible hydrogen electrode (RHE)) over 30K cycles, which is 164 times higher than that of commercial Pt/C. The quaternary MSAC-4 presented a comparable HER catalytic capability with that of Pt/C. These results indicate that the highly complexed carbon surface can enhance its ability over general electrochemical catalytic reactions. The mechanisms regarding of the ORR and HER activities of the alternated carbon surface are also theoretically and experimentally investigated in this work, showing that the synergistic effects amongst the co-doped atoms can activate or inactivate certain single-atom sites.</p>

Structure and optical properties of Zn and Mn co-doped nano-NiFe2O4

2021 ◽  
Author(s):  
Zein K. Heiba ◽  
Mohamed Bakr Mohamed ◽  
Noura M. Farag ◽  
Sameh I. Ahmed
Keyword(s):  
Optical Properties ◽  
Co Doped

scholarly journals Synthesis and Optical Properties of B-Mg co-Doped ZnO Nanoparticles

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 882
Author(s):  
Yuechan Li ◽  
Yongli Li ◽  
An Xie
Keyword(s):  
Optical Properties ◽  
Zno Nanoparticles ◽  
Great Influence ◽  
Structure Study ◽  
Band Gap Energy ◽  
One Pot ◽  
Gap Energy ◽  
Doping Impurity ◽  
Shrinkage Effect ◽  
Co Doped

Doping impurity into ZnO is an effective and powerful technique to tailor structures and enhance its optical properties. In this work, Zn1−xMgxO and Zn1−x−yMgxByO nanoparticles (x = 0, 0.1, 0.2, 0.3, 0.4; y = 0, 0.02, 0.04) were synthesized via one-pot method. It shows that the Mg and B dopants has great influence on crystallinity and surface morphology of ZnO nanoparticles, without changing the wurtzite structure of ZnO. The band structure study indicates that the competition of Conductive Band (CB) shift, Burstein–Moss (B-M) shift and Shrinkage effect will cause the band gap energy change in ZnO.

Anionic dependency of electronic and nonlinear optical properties of ionic liquids

2021 ◽  
pp. 117030
Author(s):  
Fehmi Bardak ◽  
Cemile Bardak ◽  
Caglar Karaca ◽  
Etem Kose ◽  
Sibel Bilgili ◽  
...  
Keyword(s):  
Optical Properties ◽  
Ionic Liquids ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties

Influence of Al/Er ratio on the optical properties and structures of Er3+/ Al3+ co-doped silica glasses

2021 ◽  
Vol 129 (5) ◽  
pp. 053104
Author(s):  
Yan Jiao ◽  
Mengting Guo ◽  
Renle Wang ◽  
Chongyun Shao ◽  
Lili Hu
Keyword(s):  
Optical Properties ◽  
Silica Glasses ◽  
Co Doped

scholarly journals Synthesis of carbon nitride oligomer as a precursor of melon with improved fluorescence quantum yield

2021 ◽  
Vol 2 (18) ◽  
pp. 6083-6093
Author(s):  
Yuto Miyake ◽  
Goichiro Seo ◽  
Kotaro Matsuhashi ◽  
Noriyuki Takada ◽  
Kaname Kanai
Keyword(s):  
Optical Properties ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Carbon Nitride

Melem tetramer, the newly synthesized carbon nitride compound is composed of oligomers with four melem units, is stable in air, and has improved optical properties compared to melon.

Sign in / Sign up

Export Citation Format

Share Document