Growth of SnO2 nanocrystals co-doped with Eu3+ for highly enhanced photoluminescence in mesoporous silica glasses

2019 ◽  
Vol 7 (6) ◽  
pp. 1568-1574 ◽  
Author(s):  
Ping Chen ◽  
Yiwei Mao ◽  
Shaodong Hou ◽  
Yang Chen ◽  
Xiaofen Liu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Silica Glasses ◽  
Co Doping ◽  
Enhanced Photoluminescence ◽  
Sno2 Nanocrystals ◽  
Co Doped

Highly enhanced photoluminescence of Eu3+ achieved by co-doping SnO2 nanocrystals in mesoporous silica glasses.

scholarly journals Enhanced Photoluminescence of Tb3+ Ions Ce3+ Ions and SnO2 Nanocrystals Co-doped Silica Thin Films

2021 ◽  
Author(s):  
Xin Zhang ◽  
Feng Guo ◽  
Li Zhuang ◽  
Qinghui Jin ◽  
Xiaowei Zhang
Keyword(s):  
Thin Films ◽  
Annealing Temperature ◽  
Photoluminescence Intensity ◽  
Co Doping ◽  
Enhanced Photoluminescence ◽  
Sno2 Nanocrystals ◽  
Silica Thin Films ◽  
Emission Enhancement ◽  
Doping Ratio ◽  
Co Doped

Abstract Co-doping Ce3+ ions and size-tunable SnO2 nanocrystals into Tb3+ ions embedded silica thin films produces a ninefold enhancement of Tb3+ related emission. Firstly, by optimizing the doping ratio of Sn4+ ions, the size of SnO2 nanoparticles was well tailored for achieving a greatly enhanced photoluminescence emission from Tb3+ ions. Another method to significantly enhance Tb3+ emission was increasing the proportion of Ce3+, and this method only require a relatively small amount rare earth (RE) ions for obtaining an obvious emission enhancement. On the other side, companied with the increase of Ce3+ ions concentration, the growth of CeO2 nanoparticles were proved seriously attenuated the photoluminescence intensity of Tb3+ ions. Finally, we also analyzed the influence of annealing temperature on the photoluminescence intensity. These results indicated that an appropriate proportion of Ce3+ ions and suitable size of SnO2 nanocrystals can effectively sensitize the luminescence of Tb3+ ions.

scholarly journals Structural designing of Zn2SiO4:Mn nanocrystals by co-doping of alkali metal ions in mesoporous silica channels for enhanced emission efficiency with short decay time

RSC Advances ◽  
2021 ◽  
Vol 11 (57) ◽  
pp. 36348-36353
Author(s):  
Neeti Tripathi ◽  
Tomoko Akai
Keyword(s):  
Mesoporous Silica ◽  
Alkali Metal ◽  
Metal Ions ◽  
Decay Time ◽  
Silica Matrix ◽  
Alkali Metal Ions ◽  
Impregnation Method ◽  
Co Doping ◽  
Emission Efficiency ◽  
Co Doped

Alkali metal ions co-doped Zn2SiO4:Mn nanocrystals were synthesized in a mesoporous silica matrix using solution impregnation method. A high PL-QY of 68.3% at λexc 254 nm and 3.8% at λexc 425 nm with faster decay time of <5 ms is obtained.

scholarly journals Fabrication of Ag and Mn Co-Doped Cu2ZnSnS4 Thin Film

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1520
Author(s):  
Lei Qiu ◽  
Jiaxiong Xu ◽  
Xiao Tian
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Sol Gel ◽  
Experimental Results ◽  
Nonradiative Recombination ◽  
Secondary Phases ◽  
Co Doping ◽  
Enhanced Photoluminescence ◽  
Cu2znsns4 Thin Film ◽  
Co Doped

Ag and Mn dopants were incorporated into Cu2ZnSnS4 thin film to reduce defects in thin film and improve thin film properties. Sol–gel and spin-coating techniques were employed to deposit Ag and Mn co-doped Cu2ZnSnS4 thin films. The structures, compositions, morphologies, and optical properties of the co-doped thin films were characterized. The experimental results indicate the formation of kesterite structure without Ag and Mn secondary phases. The amount of Ag in the thin films is close to that in the sols. The co-doped Cu2ZnSnS4 thin films have an absorption coefficient of larger than 1.3 × 104 cm−1, a direct optical band gap of 1.54–2.14 eV, and enhanced photoluminescence. The nonradiative recombination in Cu2ZnSnS4 thin film is reduced by Ag and Mn co-doping. The experimental results show that Ag and Mn incorporation can improve the properties of Cu2ZnSnS4 thin film.

scholarly journals Enhanced Photoluminescence of Tb3+ Ions Ce3+ Ions and SnO2 Nanocrystals Co-doped Silica Thin Films

2022 ◽  
Vol 54 (2) ◽  
Author(s):  
Xin Zhang ◽  
Feng Guo ◽  
Li Zhuang ◽  
Qinghui Jin ◽  
Xiaowei Zhang
Keyword(s):  
Thin Films ◽  
Enhanced Photoluminescence ◽  
Sno2 Nanocrystals ◽  
Silica Thin Films ◽  
Co Doped

Promoting Hydrogen Evolution of g-C3N4 Based Photocatalyst by Indium and Phosphorus Co-doping

2021 ◽  
Author(s):  
Xiao-Hang Yang ◽  
Chi Cao ◽  
Zilong Guo ◽  
Xiaoyu Zhang ◽  
Yaxin Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Post Treatment ◽  
Experimental Results ◽  
Indium Chloride ◽  
Co Doping ◽  
In Situ Copolymerization ◽  
Co Doped

Indium and phosphorus co-doped g-C3N4 photocatalyst (In,P-g-C3N4) was prepared by K2HPO4 post-treatment of indium doped g-C3N4 photocatalyst (In-g-C3N4) derived from in-situ copolymerization of dicyandiamide and indium chloride. The experimental results...

scholarly journals Cobalt-doped bioceramic scaffolds fabricated by 3D printing show enhanced osteogenic and angiogenic properties for bone repair

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Jungang Li ◽  
Chaoqian Zhao ◽  
Chun Liu ◽  
Zhenyu Wang ◽  
Zeming Ling ◽  
...  
Keyword(s):  
Compressive Strength ◽  
3D Printing ◽  
Bone Regeneration ◽  
Doping Concentration ◽  
Artificial Bone ◽  
Bone Defect Repair ◽  
Co Doping ◽  
Defect Repair ◽  
Co Doped

Abstract Background The bone regeneration of artificial bone grafts is still in need of a breakthrough to improve the processes of bone defect repair. Artificial bone grafts should be modified to enable angiogenesis and thus improve osteogenesis. We have previously revealed that crystalline Ca10Li(PO4)7 (CLP) possesses higher compressive strength and better biocompatibility than that of pure beta-tricalcium phosphate (β-TCP). In this work, we explored the possibility of cobalt (Co), known for mimicking hypoxia, doped into CLP to promote osteogenesis and angiogenesis. Methods We designed and manufactured porous scaffolds by doping CLP with various concentrations of Co (0, 0.1, 0.25, 0.5, and 1 mol%) and using 3D printing techniques. The crystal phase, surface morphology, compressive strength, in vitro degradation, and mineralization properties of Co-doped and -undoped CLP scaffolds were investigated. Next, we investigated the biocompatibility and effects of Co-doped and -undoped samples on osteogenic and angiogenic properties in vitro and on bone regeneration in rat cranium defects. Results With increasing Co-doping level, the compressive strength of Co-doped CLP scaffolds decreased in comparison with that of undoped CLP scaffolds, especially when the Co-doping concentration increased to 1 mol%. Co-doped CLP scaffolds possessed excellent degradation properties compared with those of undoped CLP scaffolds. The (0.1, 0.25, 0.5 mol%) Co-doped CLP scaffolds had mineralization properties similar to those of undoped CLP scaffolds, whereas the 1 mol% Co-doped CLP scaffolds shown no mineralization changes. Furthermore, compared with undoped scaffolds, Co-doped CLP scaffolds possessed excellent biocompatibility and prominent osteogenic and angiogenic properties in vitro, notably when the doping concentration was 0.25 mol%. After 8 weeks of implantation, 0.25 mol% Co-doped scaffolds had markedly enhanced bone regeneration at the defect site compared with that of the undoped scaffold. Conclusion In summary, CLP doped with 0.25 mol% Co2+ ions is a prospective method to enhance osteogenic and angiogenic properties, thus promoting bone regeneration in bone defect repair.

Transport mechanisms in Co-doped ZnO (ZCO) and H-irradiated ZCO polycrystalline thin films

2021 ◽  
Vol 23 (3) ◽  
pp. 2368-2376
Author(s):  
A. Di Trolio ◽  
A. Amore Bonapasta ◽  
C. Barone ◽  
A. Leo ◽  
G. Carapella ◽  
...  
Keyword(s):  
Thin Films ◽  
Opposite Effect ◽  
Transport Mechanisms ◽  
Co Doping ◽  
Polycrystalline Thin Films ◽  
Doped Zno ◽  
Co Doped

Co doping increases the ZnO resistivity (ρ) at high T (HT), whereas it has an opposite effect at low T (LT). H balances the Co effects by neutralizing the ρ increase at HT and strengthening its decrease at LT.

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 Photo-activity and low resistivity in N/Nb Co-doped TiO2 thin films by combinatorial AACVD

2016 ◽  
Vol 4 (2) ◽  
pp. 407-415 ◽  
Author(s):  
Nicholas P. Chadwick ◽  
Emily N. K. Glover ◽  
Sanjayan Sathasivam ◽  
Sulaiman N. Basahel ◽  
Shaeel A. Althabaiti ◽  
...  
Keyword(s):  
Thin Films ◽  
Functional Properties ◽  
Tio2 Thin Films ◽  
Doped Tio2 ◽  
Low Resistivity ◽  
Co Doping ◽  
Co Doped

Combinatorial AACVD has achieved the production of various niobium/nitrogen co-doped TiO2 materials in a single film. The co-doping concentrations have been correlated with functional properties.

Synergistic Effect of Eu3+ and Sm3+ Co-Doping on Photocatalytic Activity of TiO2 Nanoparticles

2011 ◽  
Vol 197-198 ◽  
pp. 891-894 ◽  
Author(s):  
Cheng Zhi Jiang ◽  
Xu Dong Lu
Keyword(s):  
Photocatalytic Activity ◽  
Synergistic Effect ◽  
Sol Gel ◽  
Blue Shift ◽  
Nano Particles ◽  
Absorption Profile ◽  
Co Doping ◽  
The Matrix ◽  
Co Doped ◽  
The Eu

Pure TiO2, Eu3+and Sm3+co-doping TiO2composite nanoparticles have been prepared by sol-gel method and characterized by the techniques such as XRD, SEM and DRS. The photocatalytic degradation of methylene blue (MB) in aqueous solution was used as a probe reaction to evaluate their photocatalytic activity. The matrix distortion of TiO2nano-particles increases after co-doping of Eu3+and Sm3+and a blue-shift of the absorption profile are clearly observed. The results show that co-doping of Eu3+and Sm3+inhibits the phase transformation of TiO2from anatase to rutile, decreases the diameter of TiO2nano-particles and significantly enhance the photocatalytic activity of TiO2. The Eu3+and Sm3+co-doped into TiO2nano-particles exert a synergistic effect on their photocatalytic activity.

Sign in / Sign up

Export Citation Format

Share Document