nio负载nanbo3knbo3纳米线的制备及其光催化性能分析.docx

解有机物的性能均有所提高,且性能随 NiO 负载量都出现了先增后降的趋势,对于 NaNbO3 纳米线,在负载量为 5%时性能最优,负载工艺对其性能有约 2 倍的提高改善。对于 NaNbO3 块体产物在在负载量为 7%时性能最优,负载工艺对其性能提高幅度不大。对于 KNbO3 纳米线,在负载量为 3%时性能最优,负载工艺对其性能有约 倍的提高改善。
关键词:一维纳米材料;光催化性能;NaNbO3;KNbO3
Abstract
In this paper, hydrothermal method was used to prepare NaNbO3 nanowires, and research the influence of reaction temperature, reaction time and the concentration of NaOH, at the same time, its’ growth mechanism can be studied. Then a two-step method was used bine molten-salt method and hydrothermal method together to prepare KNbO3 nanowires, and research the influence of reaction temperature, reaction time and the concentration of KOH, at the same time, its’ growth mechanism can be studied. Then the products’ component, morphology, structure and property was studied by XRD, SEM, TEM, UV-vis. Considering that loading a suitable co-catalyst on the surface of raw material can form a PN junction, and this may improve the raw material’s photocatalytic, so impregnation method was used to load N iO on the raw material and test its’ property in photocatalytic degradation anic materials and photocatalytic poses water to hydrogen
First hydrothermal method was used to prepare Na2Nb2O6•H2O nanowires as a precursor, and then calcine it to form NaNbO3 nanowires. Nb powder is the reactant, add it into the NaOH solution with a concentration of 10mol/L, then the reaction was taken place through a hydrothermal method at 150ºC for 8h, thus can essfully got the Na2Nb2O6•H2O nanowires as a precursor, the nanowires have a diameter of 70nm, and tens of micron long. Reaction temperature, reaction time and the concentration of NaOH do great influence to the product’s morphology ponent. When the temperature is as low as 130ºC, the products is mostly bulks, and with some nanowires surrounded. The bulks are in scale of micron, this show that the reaction is plete. When the temperature is 170ºC, the products are small NaNbO3 cubes. When the concentration of NaOH is lower than 1