A New Blue, Green and Red Upconversion Emission Nanophosphor: BaZrO3:Er,Yb

2008 ◽  
Vol 8 (12) ◽  
pp. 6425-6430 ◽  
Author(s):  
L. A. Diaz-Torres ◽  
P. Salas ◽  
J. S. Perez-Huerta ◽  
C. Angeles-Chavez ◽  
E. De la Rosa
Keyword(s):  
Perovskite Phase ◽  
Hydrothermal Process ◽  
Blue Emission ◽  
Annealing Treatment ◽  
Upconversion Emission ◽  
Excitation Power ◽  
Excitation Wavelength ◽  
Powder Samples ◽  
First Time ◽  
Facile Hydrothermal Process

Strong Blue, green, and red upconversion emission of Er3+ in nanocrystalline BaZrO3:(Yb3+Er3+) is observed. Powder samples were obtained by a facile hydrothermal process at 100 °C. The as synthesized nanocrystallites preserve a stable cubic perovskite phase under subsequent annealing treatment up to 1000 °C. No other phase or segregation of other compounds was detected. Crystallites sizes were around 115 nm and well faceted. Under IR excitation in the range between 900 and 1050 nm the Er3+ blue emission was almost not present in single Er3+ doped BaZrO3, whereas it became easily observable when Yb3+ was added as codopant. Besides, both green and red upconversion emission or upconverted signal of Er3+ are enhanced by around three orders of magnitude in comparison with the single Er3+ doped BaZrO3. The strong blue emission presents dependence on both excitation power and excitation wavelength. This is the first time that upconversion emission is observed in BaZrO3. A possible mechanism for the upconversion process that leads to the observed blue, green and red emissions under NIR excitation is suggested based on the experimental results.

A facile hydrothermal method to synthesize Sb2S3/Sb4O5Cl2 composites with three-dimensional spherical structures

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 53019-53024 ◽  
Author(s):  
Qian Jiang ◽  
Xingzhong Yuan ◽  
Hou Wang ◽  
Xiaohong Chen ◽  
Shansi Gu ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Hydrothermal Process ◽  
Three Dimensional ◽  
Facile Hydrothermal Method ◽  
Spherical Structures ◽  
First Time ◽  
Facile Hydrothermal Process

Three-dimensional spherical Sb2S3/Sb4O5Cl2 microcrystallines were synthesized for the first time via a facile hydrothermal process without any oxychlorides at 100 °C.

Multicolor luminescence and triple-mode emission of simple CaTiO3:Pr3+,Er3+ particles for advanced anti-counterfeiting

2020 ◽  
Vol 7 (13) ◽  
pp. 2506-2514 ◽  
Author(s):  
Zhenbin Wang ◽  
Pengxiang Pei ◽  
Dongjie Bai ◽  
Shanshan Zhao ◽  
Xinyu Ma ◽  
...  
Keyword(s):  
Excitation Power ◽  
Excitation Wavelength ◽  
Qr Code ◽  
Triple Mode

The multilevel anticounterfeiting QR code readily integrates the advantages of excitation wavelength-dependent PL emissions, a strong red afterglow and sensitive excitation power-dependent UCL emissions in one overall device.

Exploration of K2Ti8O17 as an anode material for potassium-ion batteries

2016 ◽  
Vol 52 (75) ◽  
pp. 11274-11276 ◽  
Author(s):  
Jin Han ◽  
Maowen Xu ◽  
Yubin Niu ◽  
Guan-Nan Li ◽  
Minqiang Wang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Anode Material ◽  
Annealing Treatment ◽  
Potassium Ion ◽  
Subsequent Annealing ◽  
Facile Hydrothermal Method ◽  
First Time

Novel K2Ti8O17 is successfully fabricated via a facile hydrothermal method combined with a subsequent annealing treatment and further evaluated as an anode material for potassium-ion batteries for the first time.

MOLTEN SALT SYNTHESIS OF YF3:Yb3+/Ln3+(Ln = Er3+, Tm3+) MICROSHEETS WITH MULTICOLOR UPCONVERSION LUMINESCENCE

2013 ◽  
Vol 06 (06) ◽  
pp. 1350061 ◽  
Author(s):  
MINGYE DING ◽  
CHUNHUA LU ◽  
LINHAI CAO ◽  
YARU NI ◽  
ZHONGZI XU
Keyword(s):  
Molten Salt ◽  
Laser Diode ◽  
Upconversion Luminescence ◽  
Emission Spectra ◽  
Upconversion Emission ◽  
Molten Salt Synthesis ◽  
Molten Salt Method ◽  
Orthorhombic System ◽  
Co Doping ◽  
First Time

In this paper, highly crystalline YF 3: Yb 3+/ Ln 3+( Ln = Er 3+, Tm 3+) microsheets were successfully synthesized by a surfactant-free molten salt method for the first time. The results indicated that the as-obtained samples belonged to orthorhombic system and exhibited microsheets morphology with side lengths of 30 to 80 μm and wall thickness from 1 to 1.5 μm. By changing the dopant's species ( Ln 3+), multicolor (yellow and blue) upconversion emission can be observed in YF 3: Yb 3+/ Ln 3+ microsheets under 980 nm laser diode (LD) excitation. The upconversion mechanisms in co-doping YF 3 samples were analyzed in detail based on the emission spectra. Importantly, this approach not only proposes a new alternative in synthesizing such materials, but also opens the possibility to meet the increasing commercial demand.

Morphological control of RGO/CdS hydrogels for energy storage

CrystEngComm ◽  
2016 ◽  
Vol 18 (7) ◽  
pp. 1090-1095 ◽  
Author(s):  
Xueyu Zhang ◽  
Xin Ge ◽  
Shihan Sun ◽  
Yuanduo Qu ◽  
Wenzhong Chi ◽  
...  
Keyword(s):  
Energy Storage ◽  
Hydrothermal Process ◽  
Morphology Control ◽  
Electrochemical Energy Storage ◽  
Morphological Control ◽  
3D Structures ◽  
Facile Hydrothermal Process ◽  
Electrochemical Energy

This paper investigated the preparation of 3D RGO/CdS hydrogels by a facile hydrothermal process, the morphology control of CdS (ball-like, rod-like, needle-like) in 3D structures, and their application in electrochemical energy storage.

scholarly journals Peanut-Like Hematite Prepared by a New Facile Hydrothermal Process for Removal of As(V)

2018 ◽  
Vol 25 (1) ◽  
pp. 23-30
Author(s):  
Chengjin Zhang ◽  
Shaoyi Jia ◽  
Songhai Wu ◽  
Yong Liu
Keyword(s):  
Hydrothermal Process ◽  
Facile Hydrothermal Process

scholarly journals Remote Laser Induced Fluorescence of Soils and Rocks

Photonics ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 411
Author(s):  
Vasily N. Lednev ◽  
Alexey F. Bunkin ◽  
Sergey M. Pershin ◽  
Mikhail Ya. Grishin ◽  
Diana G. Artemova ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Fluorescence Spectra ◽  
Space Exploration ◽  
Laser Induced Fluorescence ◽  
Excitation Wavelength ◽  
Extraterrestrial Life ◽  
Future Space ◽  
Lidar Sensing ◽  
First Time ◽  
Different Soils

The laser induced fluorescence spectroscopy was systematically utilized for remote sensing of different soils and rocks for the first time, to the best of our knowledge. Laser induced fluorescence spectroscopy measurements were carried out by the developed nanosecond LIDAR instrument with variable excitation wavelength (355, 532 and 1064 nm). LIDAR sensing of different Brazil soil samples have been carried out in order to construct a spectral database. The laser induced fluorescence spectra interpretation for different samples has been discussed in detail. The perspectives of LIDAR sensing of organic samples deposited at soils and rock have been discussed including future space exploration missions in the search for extraterrestrial life.

Mechanochemical Synthesis and Characteristics of Pb(Mg1/3Nb2/3)O3

2010 ◽  
Vol 177 ◽  
pp. 29-31
Author(s):  
Hao Wu ◽  
Cheng Chen ◽  
Dan Yu Jiang ◽  
Tao Feng ◽  
Qiang Li
Keyword(s):  
Mechanochemical Synthesis ◽  
Milling Time ◽  
Perovskite Phase ◽  
Annealing Treatment ◽  
Ferroelectric Material ◽  
Nano Particles ◽  
Processing Route ◽  
Sem Images ◽  
Lower Temperature ◽  
Xrd Patterns

This paper presents a novel mechanochemical synthesis technique for making nano-structured Pb(Mg1/3Nb2/3)O3 (PMN) ferroelectric material without annealing treatment in a much shorter time and at much lower temperature than those reported in the literature, by using the starting precursors MgO, PbO, and Nb2O5. Specimens of various milling time (3-6h) are characterized from XRD patterns to track and analyze the synthesizing procedure of this mechanochemical processing route. The time used to make the desired PMN powders varies with different milling power. When the constituent oxides were mechanically activated at 1.8KW milling power for 6h, the perovskite phase PMN powder was obtained; while it was formed when milling at 3KW for only 3h. Typical SEM images of the as-received PMN powders show that the powders are aggregated of nano-particles of about 100nm in size.

2D vanadium doped manganese dioxides nanosheets for pseudocapacitive energy storage

Nanoscale ◽  
2015 ◽  
Vol 7 (38) ◽  
pp. 16094-16099 ◽  
Author(s):  
Zhimi Hu ◽  
Xu Xiao ◽  
Liang Huang ◽  
Chi Chen ◽  
Tianqi Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Hydrothermal Process ◽  
Facile Hydrothermal Process

This work demonstrates the successful growth of 2D V-doped MnO2 nanosheets by facile hydrothermal process, which offers great potential for energy storage.

Multi-functional NaErF4:Yb nanorods: enhanced red upconversion emission, in vitro cell, in vivo X-ray, and T2-weighted magnetic resonance imaging

Nanoscale ◽  
2014 ◽  
Vol 6 (5) ◽  
pp. 2855-2860 ◽  
Author(s):  
Haibo Wang ◽  
Wei Lu ◽  
Tianmei Zeng ◽  
Zhigao Yi ◽  
Ling Rao ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Upconversion Emission ◽  
Resonance Imaging ◽  
X Ray ◽  
Weighted Magnetic Resonance Imaging ◽  
New Type ◽  
First Time

A new type of multi-functional NaErF4 nanoprobe with enhanced red upconversion emission was developed and used for in vitro cell, in vivo X-ray and T2-weighted magnetic resonance imaging for the first time.

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