Self-assembling synthesis of α-Al2O3–carbon composites and a method to increase their photoluminescence

Wang, Shifa; Zhang, Chuanfei; Sun, Guang; Yuan, Yonggang; Chen, Liang; Xi, Xiang; Ding, Qing-Ping; Chen, Bin; Li, Zhijie; Zu, Xiaotao

doi:10.1016/j.jlumin.2014.03.072

Cited by 16 publications

(6 citation statements)

References 33 publications

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“…Al 2 O 3 xerogel prepared by the same method shows a γ- Al 2 O 3 phase when sintered at 700 °C 52 , however, in this case, the Al-TiO 2 xerogel only sintered at 450 °C and the γ- Al 2 O 3 phase is unobserved as shown by XRD patterns (See Fig. 1).…”

Section: Resultsmentioning

confidence: 80%

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Luo

Wang²,

Liu

et al. 2017

Sci Rep

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Three kinds of Al-TiO2 samples and pure TiO2 samples were synthesized via a modified polyacrylamide gel route using different aluminum salts, including Al2(SO4)3∙18H2O, AlCl3, and Al(NO3)3∙9H2O under identical conditions. The influence of different aluminum salts on the phase purity, morphologies, thermal stability of anatase and photocatalytic properties of the as-prepared Al-TiO2 nanoparticles were studied. The energy gap (Eg) of Al-TiO2 nanoparticles decreases due to Al ion doping into TiO2. The photocatalytic activities of the Al-TiO2 samples were investigated by the degradation of acid orange 7 dye in aqueous solution under simulated solar irradiation. The Al-TiO2 nanoparticles prepared from Al(NO3)3∙9H2O exhibit the best photocatalytic activity among the four kinds of samples, followed in turn by the Al-TiO2 nanoparticles prepared with AlCl3, Al2(SO4)3∙18H2O and pure TiO2. The different performances are attributed to complex effects of Eg, particle size, surface morphology, phase purity and the defect sites of the Al-TiO2 nanoparticles.

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Section: Resultsmentioning

confidence: 80%

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Luo

Wang²,

Liu

et al. 2017

Sci Rep

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“…To further investigate the composition of the Al hydroxide samples, X‐ray photoelectron spectroscopy (XPS) analysis has been carried out (Figure c). All XPS spectra show C 1s peak at 284 eV, O 1s peak at 530 eV, and two peaks at 75 and 115 eV, which are attributed to Al 2s and Al 2p, respectively . High‐resolution C 1s XPS spectrum ( Figure d) reveals two types of carbon‐related species, which are CC (284.6 eV) and CO (from the carboxyl group, 288.7 eV).…”

Section: Resultsmentioning

confidence: 99%

“…Lower intensity and broader vibration of the OH bond around 3500 cm −1 observed for the samples S‐330 and S‐360 suggest that temperatures higher than 330 °C may lead to destruction of AlOH bonds. A small peak at 2460 cm −1 could only be observed for samples S‐310 and S‐320 (Figure S3, Supporting Information), which possibly belongs to the stretching vibration of OCO originating from dehydration of acetate groups …”

Section: Resultsmentioning

confidence: 99%

Single Source Precursor Chemical Vapor Decomposition Method to Fabricate Stable, Bright Emissive Aluminum Hydroxide Phosphors for UV‐Pumped White Light‐Emitting Devices

Chen

Zou

et al. 2017

Advanced Optical Materials

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Aluminum hydroxides are considered to be a potential abundant, low‐cost blue emissive material to construct UV‐pumped white light‐emitting diodes (WLEDs). In this work, a single‐source precursor chemical vapor decomposition method is adapted to fabricate stable, strongly emissive aluminum hydroxide phosphors with photoluminescence quantum yield of up to 69% in solid state by thermal decomposing aluminum diacetate hydroxide (Al(OH)(Ac)2) at temperatures (260–360 °C) in N2 atmosphere. It exhibits layered, amorphous structure and its emission of aluminum hydroxide is enhanced by electron‐donating surface hydroxyl groups and originates from F+ centers and carbon‐related defects contributing to UV (388 nm) and blue (450–520 nm) spectral regions, respectively. Employing the as‐fabricated aluminum hydroxides as blue phosphor and CuInS2 nanocrystals as red phosphor, high color rendering and high‐efficiency WLEDs with luminous efficiencies up to 37 lm W−1 and high color rendering index of 91 are fabricated. This is the best performance reported so far for aluminum hydroxide based LEDs.

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“…Since Al 3+ itself is non-luminous and the observed luminescence from ␣-Al 2 O 3 samples must be due to non-stoichiometry created by the oxygen deficiency in the system, which is expected to arise when ␣-Al 2 O 3 forms in carbon rich ambient [51]. A report by Shifa Wang et al [52] showed that ␣-Al 2 O 3 -C composite exhibits luminescence due to carbon present in the samples and they have demonstrated that increase in the C content improved the luminescence property. Hence in our case, we believe that carbon related impurities typically from the fuel used in the synthesis technique significantly contribute for the observed luminescence of ␣-Al 2 O 3 .…”

Section: Photoluminescence (Pl) Studiesmentioning

confidence: 99%

Synthesis, characterizations, antibacterial and photoluminescence studies of solution combustion-derived α-Al₂O₃nanoparticles

Prashanth

Raveendra

Krishna³

et al. 2015

Journal of Asian Ceramic Societies

163

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Please cite this article in press as: P.A. Prashanth, et al., Synthesis, characterizations, antibacterial and photoluminescence studies of solution combustion-derived ␣-Al 2 O 3 nanoparticles, J. Asian Ceram. Soc. (2015), http://dx. a b s t r a c tIn this work, we report a novel, economical, low temperature solution combustion synthesis (SCS) method to prepare ␣-Al 2 O 3 (Corundum) nanoparticles. Powder X-ray diffraction (PXRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FT-IR), BET surface area and ultraviolet visible spectroscopy (UV-vis) measurements were used to characterize the product. Antibacterial studies were examined against gram −ve Klebsiella aerogenes, Escherichia coli, Pseudomonas desmolyticum and gram +ve Staphylococcus aureus bacteria by agar well diffusion method. The ␣-Al 2 O 3 nanoparticles showed substantial effect on all the four bacterial strains. Photoluminescence (PL) measurements under excitation at about 255 nm show that the alumina nanoparticles have emission peaks at 394 and 392 nm.

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Self-assembling synthesis of α-Al2O3–carbon composites and a method to increase their photoluminescence

Cited by 16 publications

References 33 publications

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Single Source Precursor Chemical Vapor Decomposition Method to Fabricate Stable, Bright Emissive Aluminum Hydroxide Phosphors for UV‐Pumped White Light‐Emitting Devices

Synthesis, characterizations, antibacterial and photoluminescence studies of solution combustion-derived α-Al₂O₃nanoparticles

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Self-assembling synthesis of α-Al2O3–carbon composites and a method to increase their photoluminescence

Cited by 16 publications

References 33 publications

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Single Source Precursor Chemical Vapor Decomposition Method to Fabricate Stable, Bright Emissive Aluminum Hydroxide Phosphors for UV‐Pumped White Light‐Emitting Devices

Synthesis, characterizations, antibacterial and photoluminescence studies of solution combustion-derived α-Al2O3nanoparticles

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Synthesis, characterizations, antibacterial and photoluminescence studies of solution combustion-derived α-Al₂O₃nanoparticles