X-ray photoemission spectroscopy investigation of CaTiO3:Eu for luminescence property: effect of Eu3+ ion

Wang, Kai-Chen; Zhao, Bowen; Gao, Lu

doi:10.1016/j.materresbull.2016.01.038

Cited by 14 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The samples analyzed were CTO powders before adsorption experiments, and those after adsorption kinetics at pH 3 and pH 7, CTO-pH3 and CTO-pH7, respectively. Figure 13 depicts the three spectra that show As presence in samples of pH 3 and pH 7, and the other expected signals of Ca, Ti, O, and C [44,45].…”

Section: Resultsmentioning

confidence: 99%

As(III) Removal from Aqueous Solution by Calcium Titanate Nanoparticles Prepared by the Sol Gel Method

et al. 2019

View full text Add to dashboard Cite

Arsenic (As) contamination of water is a serious problem in developing countries. In water streams, arsenic can be as As(V) and As(III), the latter being the most toxic species. In this work, an innovative adsorbent based on CaTiO3 nanoparticles (CTO) was prepared by the sol-gel technique for the removal of As(III) from aqueous solution. X-ray diffraction of the CTO nanoparticles powders confirmed the CTO phase. Transmission electron microscopy observations indicated an average particle size of 27 nm, while energy dispersive X-ray spectroscopy analysis showed the presence of Ca, Ti, and O in the expected stoichiometric amounts. The surface specific area measured by Brunauer, Emmett, and Teller (BET) isotherm was 43.9 m2/g, whereas the isoelectric point determined by Zeta Potential measurements was at pH 3.5. Batch adsorption experiments were used to study the effect of pH on the equilibrium adsorption of As(III), using an arsenite solution with 15 mg/L as initial concentration. The highest removal was achieved at pH 3, reaching an efficiency of up to 73%, determined by X-ray fluorescence from the residual As(III) in the solution. Time dependent adsorption experiments at different pHs exhibited a pseudo-second order kinetics with an equilibrium adsorption capacity of 11.12 mg/g at pH 3. Moreover, CTO nanoparticles were regenerated and evaluated for four cycles, decreasing their arsenic removal efficiency by 10% without affecting their chemical structure. X-ray photoelectron spectroscopy analysis of the CTO surface after removal experiments, showed that arsenic was present as As(III) and partially oxidized to As(V).

show abstract

Section: Resultsmentioning

confidence: 99%

As(III) Removal from Aqueous Solution by Calcium Titanate Nanoparticles Prepared by the Sol Gel Method

et al. 2019

View full text Add to dashboard Cite

show abstract

“…For pure and APTEOS-modified CaTiO 3 , the Ca (2p) spectral peaks were at 345.4 eV(3/ 2 ) and 348 eV(1/ 2 ), the Ti (2p) band regions were at 457.4 eV(3/ 2 ) and 462.6 eV(1/ 2 ), and finally, the O (1s) highly intense bands showed peaks at 530.9 and 527.9 eV (Figure 3a,b). 32 The appearance of C−N/C−O groups in functionalized CaTiO 3 can be revealed from the occurrence of the C (1s) core-level spectrum at 285.3 eV. 33,23 The single peak transpiring at 400 eV corresponded to the N 1s core level and the absence of a peak at 402 eV assured the presence of free amine groups (NH 2 ) (Figure 3c,d).…”

Section: Resultsmentioning

confidence: 98%

Cross-Linked SPEEK–PEG–APTEOS-Modified CaTiO₃ Perovskites for Efficient Acid–Base Cation-Exchange Membrane Fuel Cell

Cao

Manimuthu

2020

Energy Fuels

View full text Add to dashboard Cite

Nanocomposite membranes are synthesized by the combination of sulfonated poly(ether ether ketone) (SPEEK), poly(ethylene glycol) (PEG), and 3-aminopropyl triethoxysilane (APTEOS)-modified CaTiO3. From thermogravimetric analysis (TGA) and mechanical and Arrhenius studies, it is seen that the covalent cross-linking of PEG with SPEEK exhibits a lower weight loss (91.84 wt %) at 120 °C than SPEEK (88.19 wt %). Moreover, higher activation energy (E a) and tensile stress values are obtained in the order of 26.23 kJ/mol and 23.32 MPa, respectively. The APTEOS-modified CaTiO3 nanoparticles impregnated into the SPEEK/PEG membrane cause the acid–base proton hopping mechanism (HSO3/NH2) and induce a more compact structure. The nanocomposite membranes possess exceptional proton conductivity, thermal, oxidative, and physicochemical properties than SPEEK. Further, 6 wt % functionalized CaTiO3 in the SPEEK/PEG membrane manifests the highest values of proton conductivity, current density, and power density at 80 °C in 100% RH of 65.32 mS cm–1, 403 mA cm–2, and 90 mW cm–2 with an open-circuit voltage (OCV) of 0.90 V, respectively. This membrane retains 95.37 wt % original weight during 3 h of the Fenton test.

show abstract

“…Eu 2+ and Ce 3+ based on (4f) n−1 5d-(4f) n transitions preserve structural stability at high electric eld intensities; therefore CaS:(Eu 2+ /Ce 3+ ) and SrS:(Eu 2+ /Ce 3+ ) should in future realize the unique color luminescence potential of RE-EL. 100,101 For rare earth laser materials, garnet-type Nd 3+ -activated yttrium aluminum garnet (YAG:Nd 3+ ) with a narrow uorescence spectral line, low threshold, and high power has shown the best performance. Nd 3+ single replacement of Al 3+ in the lattice in YAG, where the emission spectrum can broaden uniformly, is currently the best option for laser guidance, laser ranging, laser medical treatment, and other elds.…”

Section: Typical Applications Eldsmentioning

confidence: 99%

Sustainability applications of rare earths from metallurgy, magnetism, catalysis, luminescence to future electrochemical pseudocapacitance energy storage

et al. 2023

View full text Add to dashboard Cite

show abstract

X-ray photoemission spectroscopy investigation of CaTiO3:Eu for luminescence property: effect of Eu3+ ion

Cited by 14 publications

References 34 publications

As(III) Removal from Aqueous Solution by Calcium Titanate Nanoparticles Prepared by the Sol Gel Method

As(III) Removal from Aqueous Solution by Calcium Titanate Nanoparticles Prepared by the Sol Gel Method

Cross-Linked SPEEK–PEG–APTEOS-Modified CaTiO₃ Perovskites for Efficient Acid–Base Cation-Exchange Membrane Fuel Cell

Sustainability applications of rare earths from metallurgy, magnetism, catalysis, luminescence to future electrochemical pseudocapacitance energy storage

Contact Info

Product

Resources

About

X-ray photoemission spectroscopy investigation of CaTiO3:Eu for luminescence property: effect of Eu3+ ion

Cited by 14 publications

References 34 publications

As(III) Removal from Aqueous Solution by Calcium Titanate Nanoparticles Prepared by the Sol Gel Method

As(III) Removal from Aqueous Solution by Calcium Titanate Nanoparticles Prepared by the Sol Gel Method

Cross-Linked SPEEK–PEG–APTEOS-Modified CaTiO3 Perovskites for Efficient Acid–Base Cation-Exchange Membrane Fuel Cell

Sustainability applications of rare earths from metallurgy, magnetism, catalysis, luminescence to future electrochemical pseudocapacitance energy storage

Contact Info

Product

Resources

About

Cross-Linked SPEEK–PEG–APTEOS-Modified CaTiO₃ Perovskites for Efficient Acid–Base Cation-Exchange Membrane Fuel Cell