Synthesis and Luminescent Properties of Eu3+ Doped Lu2O3 Powders Using Micro-Emulsion

2014 ◽  
Vol 609-610 ◽  
pp. 346-350 ◽  
Author(s):  
Yu Rong Zhong ◽  
Man Zhao ◽  
Bao Long Xu
Keyword(s):  
Cetyl Trimethyl Ammonium Bromide ◽  
Luminescent Properties ◽  
Butyl Alcohol ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Micro Emulsion ◽  
Cetyl Trimethyl Ammonium ◽  
Sem Morphology ◽  
System Water

Europium-doped lutetium (Lu2O3:Eu3+ ) powders were prepared by micro-emulsion method. A small amount of an aqueous solution of Lu(NO3)3, Eu(NO3)3 and aqueous ammonia was slowly dropped into the water-in-oil micro-emulsion system (water / cetyl trimethyl ammonium bromide (CTAB) / n-butyl alcohol and cyclohexane) under vigorous stirring at 80 °C. The precipitates were obtained by Ostwald’s ripening at 250 °C for 6 h, which were then heated at 400 °C, 600 °C and 800 °C. The SEM morphology showed that the powders were rods of about few hundred nanometers in length and 40 nm in diameter. The spectrograms of X-ray diffraction (XRD) demonstrated that the Lu2O3:Eu3+ crystallinity was enhanced with the increasing of temperature. The photoluminescence results revealed that the intense emission bands centered at 612 nm. This method provides a new way to obtain different morphology and luminescent properties of Lu2O3:Eu3+ powder.

Origin of blue emission in ThO2 nanorods: exploring it as a host for photoluminescence of Eu3+, Tb3+ and Dy3+

RSC Advances ◽  
2014 ◽  
Vol 4 (93) ◽  
pp. 51244-51255 ◽  
Author(s):  
Santosh K. Gupta ◽  
P. S. Ghosh ◽  
A. Arya ◽  
V. Natarajan
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Reverse Micelle ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Blue Emission ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Cetyl Trimethyl Ammonium

Nanorods of ThO2 were synthesized in a reverse micelle technique using cetyl trimethyl ammonium bromide as a surfactant and characterized by X-ray diffraction and transmission electron microscopy.

Supercapacitive Performance of Surfactants Wrapped KIT-6/MCM-48 Templates Based Mesoporous Co3O4

2019 ◽  
Vol 14 (12) ◽  
pp. 1759-1765 ◽  
Author(s):  
N. Prakash ◽  
C. Narendhar ◽  
E. Muthusankar ◽  
D. Ragupathy
Keyword(s):  
High Performance ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
Average Pore ◽  
Supercapacitive Performance ◽  
X Ray ◽  
Bet Method ◽  
Cetyl Trimethyl Ammonium ◽  
Adsorption Desorption

In this paper, KIT: Korea Advanced Institute of Science and Technology No. 6 (KIT-6) and MCM: Mobil Composition of Matter No. 48 (MCM-48) mesoporous silica templates were prepared by wrapping Pluronic (P123) and Cetyl trimethyl ammonium bromide (CTAB). Mesoporous Co3O4 geometry tailored KIT-6 and MCM-48 with different porosity were synthesized via reflux technique. Crystal geometry, morphology, molecular vibrations and pore structure were analyzed by X-Ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and Brunauer-Emmett-Teller (BET) method based N2 adsorption–desorption for the modified materials. As expected, MCM-48 micropore-dominated electrode exhibited higher specific capacitance (442.5 F/g) which is much superior to that of KIT-6 (88.9 F/g). Outstanding electrochemical execution is due to the mesoporous tailored architecture (average pore diameter of 6.1 nm) and synergistic contribution of MCM-48 architectured with a Co3O4 core. This promising electrode material opens up a new platform for high-performance supercapacitors.

Preparation of Nano-Titanium Dioxide by Microemulsion Method

2014 ◽  
Vol 1073-1076 ◽  
pp. 8-11 ◽  
Author(s):  
Bin Huang ◽  
Li Li ◽  
Ya Ping Jiang ◽  
Shi Xiong Hao
Keyword(s):  
Titanium Dioxide ◽  
Reaction Time ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Ammonium Bromide ◽  
Microemulsion System ◽  
X Ray Diffraction ◽  
X Ray ◽  
Preparation Conditions ◽  
Cetyl Trimethyl Ammonium ◽  
Nano Titanium Dioxide

Nano-titanium dioxide was prepared in a microemulsion system by solvothermal method. The microemulsion system is composed of ammonium hexafluorotitanate((NH4)2TiF6) used as titanium source, water, cetyl trimethyl ammonium bromide (CTAB), n-butanol, and cyclohexane. The influences of reaction time, amount of urea added and the mole ratio of water to CTAB (ω) on particle size, and photocatalytic activity were investigated by photocatalytic degrading methyl orange and X-ray diffraction (XRD) characterization. The results show that the optimum preparation conditions are that reaction time 12 h, the amount of urea added 1.5 g, and the ratio of water to CTAB ratio (ω) 18:1.

Synthesis and Characterization of Nano Hydroxyapatite

2011 ◽  
Vol 264-265 ◽  
pp. 1370-1375 ◽  
Author(s):  
S. Sarfraz ◽  
B. Naseem ◽  
S. Amin ◽  
M. Mujahid
Keyword(s):  
Cetyl Trimethyl Ammonium Bromide ◽  
Lattice Structure ◽  
Hexagonal Lattice ◽  
Nano Particles ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cetyl Trimethyl Ammonium ◽  
Chemical Groups

Hydroxyapatite (HA) is considered to form major component of bones and teeth. Synthesis of hydroxyapatite (Calcium phosphate, Ca10(PO4)6(OH)2) was carried out to produce nano powders. The size and shape of nano particles was controlled during synthesis by using templates of Cetyl Trimethyl Ammonium Bromide (CTAB). A cationic surfactant, CTAB creates micellar structures which would act as nano reactors for the synthesis of nano scale HA. Yield of the final product has also been examined by varying the surfactant concentration. X-ray diffraction data revealed characteristic peaks of HA, where a predominantly hexagonal lattice structure could be deduced. FTIR was used to observe the various chemical groups present in the product. Scanning electron microscope was used for the characterization of nano particles.

scholarly journals Modification of Carbon Nanotube for Synthesis of Titania Nanotube (Tint)-Carbon Nanotube (Cnt) Composite

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Desi Heltina
Keyword(s):  
Carbon Nanotube ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Phenol Degradation ◽  
Dispersion Stability ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Titania Nanotube ◽  
Cetyl Trimethyl Ammonium

Carbon nanotube (CNT) is a material widely chosen for object of research in nano technology. Apart from its good absorbent property, CNT also has a unique structure, superior mechanic and electric properties and its high strength. The property of CNT above is to be expected to improve performance of Titania nanotube (TiNT) composite. Properties of pure CNT are hydrophobic at the surface and low dispersion stability. To improve dispersability of CNT then modification need to be modified. Adding Cetyl trimethyl ammonium bromide (CTAB) surfactant on CNT is a way to increase dispersion stability of TiNT-CNT. The objective of the research was to study influence of adding of Cetyl trimethyl ammonium bromide (CTAB) surfactant to synthesis of TiNT-CNT composite in degrading phenol compound. Pure CNT was added with CTAB surfactant in liquid, then was sonificated and dried. Surfactant Cetyl trimethyl ammonium bromide (CTAB) added CNT then composited with TiNT. Phenol degradation then tested by using TiNT-CNT (CTAB) in reactor for 4.5 hours. Then sample was characterized by employing Field Emission Scanning Electron Microscopy (FESEM), X-ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR) and UV-vis Spectroscopy. The result of experiments from FESEM characterization showed forming of TiNT-CNT composites morphology. From X–ray Diffraction (XRD) characterization showed crystal formed on TiNT-CNT only of anatase crystal. Degradation of TiNT-NT composite (CTAB) to phenol was also studied.

scholarly journals Morphology-Controlled Synthesis Of SrTiO3 Nanocube By Capping Agent-Assisted Solvothermal Method

Molekul ◽  
2016 ◽  
Vol 11 (1) ◽  
pp. 25
Author(s):  
Yulia Eka Putri ◽  
Alvionita Alvionita ◽  
Rini Rahma Yanti ◽  
Diana Vanda Wellia
Keyword(s):  
Cetyl Trimethyl Ammonium Bromide ◽  
Molar Ratio ◽  
Head Group ◽  
Ammonium Bromide ◽  
Capping Agent ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Transmission Electron ◽  
Cetyl Trimethyl Ammonium

The synthesis of SrTiO3 nanocubes have been carried out by solvothermal process using cetyl trimethyl ammonium bromide (CTAB) as capping agent to control the particles morphology. The condition of the synthesis was obtained at 160 ºC for 24 hours with molar ratio of SrTiO3 and capping agent was 1 : 1. The X-ray diffraction (XRD) pattern shows that SrTiO3 adopts a perovskite structure with a higher intensity of 110 at 2q:32.33º and the crystallite size calculated from FWHM was found to be 41 nm. Fourier transform infrared (FTIR) spectrum shows a shift in particular absorption band attributed the interaction between SrTiO3 particles surface and the head group of CTAB molecules. Transmission electron microscopy (TEM) image shows the cubic-like particles of SrTiO3, this indicatesthat CTAB successfully functions as capping agent on the synthesis of SrTiO3.

Synthesis and Infrared Emisstivity Properties of CdS/ZnS/Al Composite Material with Microemulsions

2011 ◽  
Vol 311-313 ◽  
pp. 135-139
Author(s):  
You Jun Wang ◽  
Xu Liang Lü ◽  
An Zhong Deng ◽  
Dong Li
Keyword(s):  
Composite Material ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Ph Value ◽  
Ammonium Bromide ◽  
Infrared Emissivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Al Composite ◽  
Reverse Microemulsions ◽  
Cetyl Trimethyl Ammonium

CdS/ZnS core-shell structure was synthesized with reverse microemulsions in the system of cetyl trimethyl ammonium bromide (CTAB)/ C5H12O/ C6H14/H2O and precipitator mixed thioacetamide (TAA )and ethylenediamine (EDA), which was coated on the surface of Al particles. The characteristics of the composite particles were investigated by means of X-ray diffraction (XRD), scanning electron microscope (SEM )and Fourier transform infrared (FTIR). Emissivity of composite material in 8~14 µm waveband was 0.2574. The results showed composite material had lower infrared emissivity when PH value was between10 and 11, mol ratio of Zn/Cd was 0.3, and the reaction temperature was 70°C.

scholarly journals Preparation of Porous Hydroxyapatite Using Cetyl Trimethyl Ammonium Bromide as Surfactant for the Removal of Lead Ions from Aquatic Solutions

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1617
Author(s):  
Silviu-Adrian Predoi ◽  
Carmen Steluta Ciobanu ◽  
Mikael Motelica-Heino ◽  
Mariana Carmen Chifiriuc ◽  
Monica Luminita Badea ◽  
...  
Keyword(s):  
Cetyl Trimethyl Ammonium Bromide ◽  
Morphological Changes ◽  
Low Cost ◽  
Lead Ions ◽  
Ammonium Bromide ◽  
Porous Hydroxyapatite ◽  
X Ray ◽  
Composition And Structure ◽  
Cetyl Trimethyl Ammonium ◽  
Co Precipitation

In the present study, a new low-cost bioceramic nanocomposite based on porous hydroxyapatite (HAp) and cetyl trimethyl ammonium bromide (CTAB) as surfactant was successfully obtained by a simple chemical co-precipitation. The composition and structure of the HAp-CTAB were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), scanning electron microscope (SEM) equipped with an energy dispersive X-ray (EDX) spectrometer, and N2 adsorption/desorption analysis. The capacity of HAp-CTAB nanocomposites to remove the lead ions from aqueous solutions was studied by adsorption batch experiments and proved by Langmuir and Freundlich models. The Pb2+ removal efficiency of HAp-CTAB biocomposite was also confirmed by non-destructive ultrasound studies. The cytotoxicity assays showed that the HAp-CTAB nanocomposites did not induce any significant morphological changes of HeLa cells after 24 h of incubation or other toxic effects. Taken together, our results suggests that the obtained porous HAp-CTAB powder could be used for the decontamination of water polluted with heavy metals, such as Pb2+.

Synthesis of Fe3O4 Nanoparticles Prepared by Various Surfactants and Studying their Characterizations

2008 ◽  
Vol 273-276 ◽  
pp. 22-27 ◽  
Author(s):  
Ali Shokuhfar ◽  
S. Alibeigi ◽  
Mohammad Reza Vaezi ◽  
Sayed Khatiboleslam Sadrnezhaad
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Precipitation Method ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
Mixed Salt ◽  
Magnetite Fe3o4 ◽  
Cetyl Trimethyl Ammonium ◽  
Size And Morphology ◽  
Co Precipitation

Magnetite (Fe3O4) nanoparticles were prepared simply by the reverse co-precipitation method from the solution of ferrous/ferric mixed salt in the presence of cationic surfactant (cetyl trimethyl ammonium bromide, CTAB) and nonionic surfactant (Polyethylene glycol, PEG) in two concentrations. Meanwhile, Fe3O4 nanoparticles without surfactant are also synthesized under the same condition for comparison. In addition via the reverse co-precipitation method, the pH which is an important factor in synthesis of magnetite was controlled at high values easily. The experimental results reveal that addition of surfactants affected on the size and morphology of the nanoparticles based on the X-ray diffraction (XRD) and scanning electron microscope (SEM) characterizations.

scholarly journals The Sorption Performance of Cetyl Trimethyl Ammonium Bromide-Capped La0.9Sr0.1FeO3 Perovskite for Organic Pollutants from Industrial Processes

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1640 ◽  
Author(s):  
Shimaa M. Ali ◽  
Areej A. Eskandrani
Keyword(s):  
Cetyl Trimethyl Ammonium Bromide ◽  
Ammonium Bromide ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
Surfactant Complex ◽  
Sorption Ability ◽  
Cetyl Trimethyl Ammonium ◽  
Xrd Patterns ◽  
Oppositely Charged ◽  
Microwave Assisted Method

La0.9Sr0.1FeO3 perovskite, prepared by the microwave-assisted method, was capped with cetyl trimethyl ammonium bromide (CTAB) cationic surfactant, and applied as a sorbent for the removal of the anionic Congo red (CR) dye from aqueous solutions. X-ray diffraction (XRD) patterns showed that the perovskite structure was not affected by capping; however, the particle size increased. There was a hipsochromic shift in the value of λmax of the CR absorption spectrum in the presence of CTAB, which indicated the formation of an oppositely charged dye–surfactant complex. The adsorption efficiency of CTAB-capped La0.9Sr0.1FeO3 was independent of the pH of the solution—equilibrium was reached after a few minutes. The value of the maximum adsorption capacity, qm, was 151.52 mg·g−1, which was 10-times higher than that of the pure perovskite. The proposed sorbent maintained its excellent sorption ability in the presence of the sample matrix; therefore, it can be regenerated and reused with unchanged performance.

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