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Search Results: 1 - 10 of 117034 matches for " Ming-Liang Chen "
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The Improved Photocatalytic Properties of Methylene Blue for V2O3/CNT/TiO2 Composite under Visible Light
Ming-Liang Chen,Won-Chun Oh
International Journal of Photoenergy , 2010, DOI: 10.1155/2010/264831
Abstract: Multiwall carbon nanotube (MWCNT), vanadyl acetylacetonate (V(acac)3), and titanium n-butoxide (TNB) were used as carbon, vanadium oxide, and titanium oxide precursor to prepare V2O3/CNT/TiO2 composite. The obtained composite was characterized by BET surface area measurement, X-ray diffraction, transmission electron microscopy, and energy dispersive X-ray analysis. In addition, we used methylene blue (MB) solution under condition of visible light irradiation to determine their photocatalytic degradation efficiency. In conclusion, the V2O3/CNT/TiO2 composite had excellent photocatalytic degradation for MB solution under visible light. 1. Introduction In recent years, a great deal of interest has been devoted to the photocatalytic degradation of organic water pollutants on semiconductor particles. Anatase TiO2 has been widely employed in these studies, mainly due to its outstanding photocatalytic activity and stability. The current bottleneck with TiO2 photocatalysis lies in its low quantum yield, which depends on the ratio of the surface charge carrier transfer rate to the electron-hole recombination [1]. The influence of various transition metal ions on the photoactivity of TiO2 for many reactions has been studied with the aim of improving the efficiency of the photocatalytic process. Different doping effects have been reported in the literature, perhaps due to the widely varying experimental conditions for sample preparation and for the determination of photoactivity employed by different researchers [1–8]. Among the transition metal ions, vanadium ion is attractive because vanadium doping can increase carrier lifetime [2] and apparently also extend the absorption range of TiO2 [2, 3, 8]. Vanadium-doped TiO2 samples have been the object of many papers, including preparation and characterization, spectroscopic features, dynamics of charge-transfer trapping, and photocatalytic behavior [2–15]. Under visible light irradiation, doping of vanadium in TiO2 increased its photocatalytic activity [10–15]. Carbon materials can be used as support materials, due to their flexibility as support in tailoring the catalyst properties to specific needs [16]. Activated carbon has many advantages if utilized as catalyst support: resistant to acidic or basic media, stable at high temperatures in an inert atmosphere, possible to tailor its pore structure and chemical nature of the surface, and so forth [17]. However, activated carbon support also suffers several drawbacks: low mechanical stability which induces the formation of fines during operation and high tortuosity,
Bis(3-methylanilinium) naphthalene-1,5-disulfonate
Ming-Liang Liu,Zi-Qi Chen
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812021290
Abstract: In the crystal of the title molecular salt, 2C7H10N+·C10H6O6S22 , the naphthalene-1,5-disulfonate anion is located on an inversion center and accepts N—H...O hydrogen bonds from the 3-methylanilinium cations, forming supramolecular layers parallel to the ac plane.
Synthesis and highly visible-induced photocatalytic activity of CNT-CdSe composite for methylene blue solution
Chen Ming-Liang,Oh Won-Chun
Nanoscale Research Letters , 2011,
Abstract: Carbon nanotube-cadmium selenide (CNT-CdSe) composite was synthesized by a facile hydrothermal method derived from multi-walled carbon nanotubes as a stating material. The as-prepared products were characterized by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy (TEM), and UV-vis diffuse reflectance spectrophotometer. The as-synthesized CNT-CdSe composite efficiently catalyzed the photodegradation of methylene blue in aqueous solutions under visible-light irradiation, exhibiting higher photocatalytic activity.
On the Products $(1^\ell+1)(2^\ell+1)\cdots (n^\ell +1)$, II
Yong-Gao Chen,Ming-Liang Gong
Mathematics , 2013, DOI: 10.1016/j.jnt.2014.04.022
Abstract: In this paper, the following results are proved: (i) For any odd integer $\ell$ with at most two distinct prime factors and any positive integer $n$, the product $(1^\ell+1)(2^\ell+1)\cdots (n^\ell +1)$ is not a powerful number; (ii) For any integer $r\ge 1$, there exists a positive integer $T_r$ such that, if $\ell$ is a positive odd integer with at most $r$ distinct prime factors and $n$ is an integer with $n\ge T_r$, then $(1^\ell+1)(2^\ell+1)\cdots (n^\ell +1)$ is not a powerful number.
Magnetic and Magnetocaloric Study of the Ferromagnetically Coupled GdF3: The Best Cryogenic Magnetic Coolant Ever
Yan-Cong Chen,Jun-Liang Liu,Ming-Liang Tong
Physics , 2015,
Abstract: The magnetic susceptibility and isothermal magnetization for GdF3 were measured, and the isothermal entropy change was evaluated up to 9 T. Combining the large isotropic spin of Gd3+, the dense structure and the weak ferromagnetic interaction, an extremely large -(delta)Sm for GdF3 was observed up to 528 mJ cm-3 K-1 for (delta)H = 9 T, proving itself to be the best cryogenic magnetic coolant ever.
Evaluation of Binding and Capturing Ability of Dicarboxylic Acid Dihydrazide-formaldehyde Resins for Zn2+

CHEN Ming-liang,XIE Wu-hua,

过程工程学报 , 2003,
Abstract: The chelate resins of dicarboxylic acid dihydrazides-formaldehyde were synthesized by polycondensation of dicarboxylic acid dihydrazides with formaldehyde. The collecting ability for Zn2+ was investigated by batch tests. The collecting efficiency of these three resins decreased in the order of succinic acid dihydrazides-formaldehyde resin>malonic acid dihydrazides-formaldehyde resin>oxalic acid dihydrazides-formaldehyde resin. The influences of pH value, capturing time and temperature were investigated. It is found that the collecting efficiency is dependent on pH value, and high temperature is unfavorable to collecting Zn2+. The resins reach the highest capacity of Zn2+ capture after 3 h of adsorption.
The dilemma of treating vertebrobasilar dolichoectasia
Yu-Wei Lin,Chih-Hung Chen,Ming-Liang Lai
Clinics and Practice , 2012, DOI: 10.4081/cp.2012.e84
Abstract: Vertebrobasilar dolichoectasia (VBD) is a common phenomenon among people over 50 years old, and the related clinical expressions are varied. One of our VBD patients presented with brainstem infarction initially, received low molecular weight heparin treatment, and developed rupture of the dolichoectasia segment. Another patient with a similar-sized VBD experienced recurrent brainstem infarction three times over 2 years, despite higher bleeding tendency and long-term antiplatelet treatment. The third patient with a smallersized VBD, had left hemiplegia and received intravenous recombinant tissue plasminogen activator within 3 h, totally recovered with no lesions detected on brain Magnetic Resonance Imaging (MRI). The pathophysiology of VBD is unique, its prevalence and risks of ischemic stroke and intracranial hemorrhage both increase as the degree of arterial dolichoectasia extends, making the strategy of management quite a challenge. The best management of VBD is controlling arterial hypertension and following up with image studies regularly to detect the early extension of VBD degree.
All-optical diode based on plasmonic attenuation and nonlinear frequency conversion
Ming-Liang Ren,Xiao-Lan Zhong,Bao-Qin Chen,Zhi-Yuan Li
Physics , 2012, DOI: 10.1088/0256-307X/30/9/097301
Abstract: We present design of an all-optical diode in a metal-dielectric structure where plasmonic attenuation and quasi-phase-matching (QPM) is harnessed to improve its performance greatly. Due to the anti-symmetric design of the nonlinear susceptibility, different incident direction will ignite different plasmonic nonlinear process, which either compensates plasmonic attenuation sufficiently or accelerates it seriously. As a result, unidirectional output of plasmonic signal is achieved. This designed all-optical diode shows advantages of low power consumption, short sample length, high isolation contrast, wide acceptance of structural and initial conditions, and tunable unidirectionality, and becomes of practical interest.
Bis(2-trifluoromethyl-1H-benzimidazol-3-ium) tetrachloridomercurate dihydrate
Ming-Liang Liu
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812018855
Abstract: In the title compound, (C8H6F3N2)2[HgCl4]·2H2O, the HgII cation is coordinated by four Cl anions in a distorted tetrahedral geometry. In the crystal, the 2-trifluoromethyl-1H-benzimidazolium cations link to the [HgCl4]2 complex anions and lattice water molecules via N—H...Cl and N—H...O hydrogen bonds, and the lattice water molecules further link to the Hg complex anion and the organic cations via O—H...Cl and O—H...F hydrogen bonding. One of the trifluoromethyl groups is disordered over two orientations in a 0.59 (4):0.41 (4) ratio.
Bis(3-methylanilinium) hexachloridostannate(IV) dihydrate
Ming-Liang Liu
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812017618
Abstract: In the title compound, (C7H10N)2[SnCl6]·2H2O, the SnIV atom lies on a site with symmetry 2/m. One of the Cl atoms lies on a mirror plane and the 3-methylanilinium cation is also situated on a mirror plane. The water molecule is located on a twofold rotation axis. The H atoms of the methyl and ammonium groups and the solvent water molecule are disordered by symmetry. In the crystal, N—H...Cl, O—H...Cl and N—H...O hydrogen bonds connect the organic cations, the inorganic octahedrally shaped anions and the water molecules.
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