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In this paper, the sol-gel method is used to prepare the nano GaN powder. In which we use Ga2O3 as the gallium source, citric acid as the chelating agent to prepare the former drive material, after to be jello, we put it into NH3 environment to get the GaN sample. The two photoluminescence peaks by PL show that GaN has good optical performance, through the first principle calculation we know that...
Ba-doped BiFeO3 (Bi1-xBaxFeO3) nanoparticles have been synthesized by sol-gel process using bismuth nitrate and iron nitrate as sources. X-ray diffraction (XRD) results show that a peak shift toward low angle caused by the Ba doping. Two characteristic peaks of (104) and (110) merging to a single peak was found when the Ba concentration up to 1%. Transmission electron microscope (TEM) images show...
Various loading amount of La-CuO/TiO2 were synthesized via a one step sol-gel process. The crystal structure and chemical properties were characterized using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). XRD analysis revealed that two characteristic peaks at 35.54° and 38.76° according to cubic CuO were observed in the X-ray diffraction patterns of La-CuO/TiO2. Ti4+, Olat into...
A series of Zn2+ and Eu3+ co-doped TiO2 catalysts were prepared by a modified sol-gel method. The prepared catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy(TEM) and ultraviolet-visible diffuse reflection spectroscopy(UV-vis DRS). Characteristic results clearly show that all of Zn2+ and Eu3+ co-doped TiO2 samples exclusively consist of primary anatase crystallites,...
TiO2 is an ideal material for catalytic technology due to its unique properties. In this paper, the effect of Sm3+ dopant on the photocatalytic activity of TiO2 was studied to improve the catalytic efficiency of TiO2. The Sm3+-TiO2 photocatalyst was made from Titanium Tetrabutoxide and Samarium Oxide with the Sol-Gel process and used to degrade reactive orange 4 (RO4) in Azo Dyes. The characteristics...
We prepared a novel hybrid membrane by doping recast Nafion@ membrane with SiO2-CNTs composites where carbon nanotubes (CNTs) were decorated with SiO2 nano-particles. SiO2-CNTs were prepared via sol-gel method, and then mixed with nafion resin through sonication. Hydrophilic SiO2 nano-particles were chosed to increase the water uptake of hybrid membrane, and the CNTs were chosed to improve the mechanical...
Titania has attracted considerable attentions for its important role in piezoelectricity application. Additionally, lanthanide ion doped titania behaves increased piezoelectricity performance for some systems. It is critical to assess the local environment of lanthanide ions in titania, which will allow greater control over the desired properties. In this work, TiO2 nanoparticles doped with erbium...
Nd3+ doped PbZr0.52Ti0.48O3 (PNZT) nanopowders were prepared by sol-gel methods in ethylene glycol system. Neodymium nitrate was used as Nd3+ source. The reaction mechanisms of nanopowder preparing process from the sol were discussed through using FTIR, XRD, TG-DTA, and it was proved that the heating temperature of PNZT was 50degC-100degC higher than PZT. PNZT lattice structure was characterized...
A new class of polyimide/silica-alumina (PI/SiO/sub 2/-Al/sub 2/O/sub 3/) composite film was prepared by synthesizing ceramic oligomers through sol-gel reaction using tetraethoxysilane (TEOS) and heteropropyl-aluminium (HPAl) as the inorganic precursors and incorporating them into polyamic acid (PAA) derived from pyromellitic dianhydride (PMDA) and 4,4'-oxydianiline (ODA) in N,N-diethlacetanide (DMA/sub...
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