Synthesis and spectroscopic properties of Yb3+ and Tb3+ co-doped GdBO3 materials showing down- and up-conversion luminescence

2015 ◽  
Vol 44 (9) ◽  
pp. 4063-4069 ◽  
Author(s):  
Tomasz Grzyb ◽  
Konrad Kubasiewicz ◽  
Agata Szczeszak ◽  
Stefan Lis
Keyword(s):  
Pechini Method ◽  
Sol Gel ◽  
Spectroscopic Properties ◽  
Dual Mode ◽  
Co Doped

Gadolinium orthoborates doped with Yb3+ and Tb3+ ions, showing dual-mode luminescence (down- and up-conversion), were synthesised by the sol–gel Pechini method and analysed.

Dual-mode modulation of luminescence chromaticity in AgLa(MoO4)2:Yb3+,Ho3+ up-conversion phosphors

2016 ◽  
Vol 4 (10) ◽  
pp. 1964-1971 ◽  
Author(s):  
Ting Li ◽  
Chongfeng Guo ◽  
Hao Suo ◽  
Puju Zhao
Keyword(s):  
Near Infrared ◽  
Sol Gel ◽  
Dual Mode ◽  
Sol Gel Process ◽  
Co Doped

A series of Yb3+/Ho3+ co-doped and Yb3+/Ho3+/Ce3+ tri-doped AgLa(MoO4)2 phosphors with green (542 nm) and red (660 nm) double color up-conversion (UC) emissions with 980 nm near-infrared (NIR) excitation were synthesized by a sol–gel process.

Spectroscopic properties of Y1−xEuxBO3 and Y1−xTbxBO3 nanopowders obtained by the sol–gel Pechini method

2014 ◽  
Vol 155 ◽  
pp. 374-383 ◽  
Author(s):  
Agata Szczeszak ◽  
Konrad Kubasiewicz ◽  
Tomasz Grzyb ◽  
Stefan Lis
Keyword(s):  
Pechini Method ◽  
Sol Gel ◽  
Spectroscopic Properties

Spectroscopic properties of Tm3+/Al3+ co-doped sol–gel silica glass

2015 ◽  
Vol 42 ◽  
pp. 287-292 ◽  
Author(s):  
Xue Wang ◽  
Fengguang Lou ◽  
Shikai Wang ◽  
Chunlei Yu ◽  
Danping Chen ◽  
...  
Keyword(s):  
Silica Glass ◽  
Sol Gel ◽  
Spectroscopic Properties ◽  
Co Doped

Fabrication of F–Nb co-doped transparent conducting TiO2 films using the sol-gel method

2021 ◽  
Vol 126 ◽  
pp. 105675
Author(s):  
Yang Ren ◽  
Haiyan He ◽  
Yunwei Wang ◽  
Ying Gong ◽  
Gaoyang Zhao
Keyword(s):  
Sol Gel ◽  
Tio2 Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Transparent Conducting ◽  
Co Doped

scholarly journals Green Synthesis of N/Zr Co-Doped TiO2 for Photocatalytic Degradation of p-Nitrophenol in Wastewater

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 235
Author(s):  
Hayette Benkhennouche-Bouchene ◽  
Julien G. Mahy ◽  
Cédric Wolfs ◽  
Bénédicte Vertruyen ◽  
Dirk Poelman ◽  
...  
Keyword(s):  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Sol Gel ◽  
Visible Region ◽  
Chemical Properties ◽  
Pure Tio2 ◽  
Molar Ratio ◽  
Xps Spectra ◽  
Doped Tio2 ◽  
Co Doped

TiO2 prepared by a green aqueous sol–gel peptization process is co-doped with nitrogen and zirconium to improve and extend its photoactivity to the visible region. Two nitrogen precursors are used: urea and triethylamine; zirconium (IV) tert-butoxide is added as a source of zirconia. The N/Ti molar ratio is fixed regardless of the chosen nitrogen precursor while the quantity of zirconia is set to 0.7, 1.4, 2, or 2.8 mol%. The performance and physico-chemical properties of these materials are compared with the commercial Evonik P25 photocatalyst. For all doped and co-doped samples, TiO2 nanoparticles of 4 to 8 nm of size are formed of anatase-brookite phases, with a specific surface area between 125 and 280 m2 g−1 vs. 50 m2 g−1 for the commercial P25 photocatalyst. X-ray photoelectron (XPS) measurements show that nitrogen is incorporated into the TiO2 materials through Ti-O-N bonds allowing light absorption in the visible region. The XPS spectra of the Zr-(co)doped powders show the presence of TiO2-ZrO2 mixed oxide materials. Under visible light, the best co-doped sample gives a degradation of p-nitrophenol (PNP) equal to 70% instead of 25% with pure TiO2 and 10% with P25 under the same conditions. Similarly, the photocatalytic activity improved under UV/visible reaching 95% with the best sample compared to 50% with pure TiO2. This study suggests that N/Zr co-doped TiO2 nanoparticles can be produced in a safe and energy-efficient way while being markedly more active than state-of-the-art photocatalytic materials under visible light.

scholarly journals Preparation and Characterization of Visible-Light-Activated Fe-N Co-Doped TiO2and Its Photocatalytic Inactivation Effect on Leukemia Tumors

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Kangqiang Huang ◽  
Li Chen ◽  
Jianwen Xiong ◽  
Meixiang Liao
Keyword(s):  
Electron Microscope ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Light Therapy ◽  
Cell Counting ◽  
Visible Absorption ◽  
X Ray ◽  
Photocatalytic Inactivation ◽  
Inactivation Efficiency ◽  
Co Doped

The Fe-N co-doped TiO2nanocomposites were synthesized by a sol-gel method and characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), ultraviolet-visible absorption spectroscopy (UV-vis) and X-ray photoelectron spectroscopy (XPS). Then the photocatalytic inactivation of Fe-N-doped TiO2on leukemia tumors was investigated by using Cell Counting Kit-8 (CCK-8) assay. Additionally, the ultrastructural morphology and apoptotic percentage of treated cells were also studied. The experimental results showed that the growth of leukemic HL60 cells was significantly inhibited in groups treated with TiO2nanoparticles and the photocatalytic activity of Fe-N-TiO2was significantly higher than that of Fe-TiO2and N-TiO2, indicating that the photocatalytic efficiency could be effectively enhanced by the modification of Fe-N. Furthermore, when 2 wt% Fe-N-TiO2nanocomposites at a final concentration of 200 μg/mL were used, the inactivation efficiency of 78.5% was achieved after 30-minute light therapy.

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