• A DFT study on N-doped TiO2 anataseA DFT study on N-doped TiO2 anatase

    Abstract. In order to understand the photocatalytic mechanisms of N-doped TiO2 with different doping positions of N, this research performed ab-initio calculations based on density functional theory (DFT) without and with Hubbard U correction, concentrate on the electronic structure of the materials. The adopted value of effective Hubbard U for ...

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  • Efficiency evaluation of stable cyanide complexes conversion and its applicationEfficiency evaluation of stable cyanide complexes conversion and its application

    Abstract. In this paper, we present the evaluation results of the conversion efficiency of stable cyanide complexes using a specialized distillation system. The experiments show that the optimal distillation time for complexes of [Fe(CN)6]4-and [Fe(CN)6]3-is 60 minutes, conversion efficiencies of [Fe(CN)6]4- and [Fe(CN)6]3- are 100 ± 0,08 % and ...

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  • Ragworm (Nereidae: Tylorrhynchus SP.) in soil macro-fauna community structure in Hai Duong province - A Northern coastal area of VietnamRagworm (Nereidae: Tylorrhynchus SP.) in soil macro-fauna community structure in Hai Duong province - A Northern coastal area of Vietnam

    Abstract. The study is focused on ragworm (Polychaeta: Nereidae: Tylorrhynchus) in soil macrofauna community structure in a Northern Coastal Area of Vietnam. Field study was conducted during April and May 2016, at An Thanh, Tu Ky district of Hai Duong province. From Thai Binh river into inhabited areas, five habitat types were investigated inclu...

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  • Species composition and distribution of polychaete (polychaeta) in mangrove eco-system, Da Loc commune, Hau Loc district, Thanh Hoa provinceSpecies composition and distribution of polychaete (polychaeta) in mangrove eco-system, Da Loc commune, Hau Loc district, Thanh Hoa province

    Abstract. A study on species composition and density of polychaete (Polychaeta) was investigated in mangrove eco-system, Da Loc commune, Hau Loc District, Thanh Hoa province. Samples were collected in April, July, and November, 2010, from cross-sections of Len estuary and mangrove forests. A total of 15 polychaete species, belonging to 11 genera...

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  • Coefficients of thermal expansion of metallic thin films with body-centered cubic structureCoefficients of thermal expansion of metallic thin films with body-centered cubic structure

    Abstract. The coefficients of thermal expansion of metallic thin films with body-centered cubic (BCC) structure at ambient conditions were investigated using the statistical moment method (SMM), including the anharmonicity effects of thermal lattice vibrations. The analytical expressions of Helmholtz free energy, lattice constant, and linear the...

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  • Effects of fermentation conditions on ethanol production from corn by Saccharomyces cerevisiae MS42Effects of fermentation conditions on ethanol production from corn by Saccharomyces cerevisiae MS42

    Abstract: Fermentation is a complicated process which depends on a variety of conditions. In order to gain high fermentation efficiency with a low level of toxins and impurities to obtain good products, it is essential to determine suitable conditions for the process. Within the scope of this study, the effects of some key conditions was estimat...

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  • Influence of temperature on the microstructure and phase transition of a CaSiO3 bulk modelInfluence of temperature on the microstructure and phase transition of a CaSiO3 bulk model

    Abstract. This paper studies the influence of temperature 500 K, 1500 K, 2500 K, 3500 K and 4000 K on the microstructure and phase transition of a CaSiO3 bulk model using the Molecular Dynamics method with the Born-Mayer pair interaction potential and periodic boundary conditions. The obtained samples were analyzed through the radial distributio...

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  • Influences of growth temperature and solution concentration on hydrothermal preparation of ZnO nanorodInfluences of growth temperature and solution concentration on hydrothermal preparation of ZnO nanorod

    Abstract. ZnO nanorod structures were grown on glass substrates using a hydrothermal method. Influences of growth temperature and hydrothermal solution concentration on ZnO nanorod structures were investigated. The results indicate that diameter and length of the ZnO nanorod increase with an increasing of growth temperature and hydrothermal sol...

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  • Enhanced photocatalytic efficiency of TiO2 with doped Ni-immobilized on silica gelEnhanced photocatalytic efficiency of TiO2 with doped Ni-immobilized on silica gel

    Abstract. Ni-doped TiO2, immobile on silica gel (Ti1−xNixO2/SiO2), was synthesized using the sol-gel method. The XRD patterns show that the TiO2 particles on SiO2 have an anatase crystalline structure with a particle size of around 7 nm in diameter. The results of absorption spectra indicate that the band gap of the anatase TiO2 powder was 3.3 ...

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  • Adsorption of methylene blue from aqueous solutions using activated carbon derived from coffee husksAdsorption of methylene blue from aqueous solutions using activated carbon derived from coffee husks

    Abstract. The adsorption of methylene blue (MB) onto activated carbon (AC) derived from coffee husk using zinc chloride activation at 600 oC was studied. The effects of various parameters such as contact time, initial MB concentration and temperature were investigated. The adsorption kinetics of pseudo first-order and pseudo second-order were u...

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