γ-AlOOH纳米棒的水热法合成及其光吸收特性（英文）

Synthesis and Optical Absorpition Properties of γ-AlOOH Nanorods by Hydrothermal Method

以1 mol/LAlCl3为铝源和1 mol NaOH为沉淀剂,利用水热法在180℃、48 h和pH值为9条件下合成了长度大于300 nm和直径约8 nm的γ-AlOOH纳米棒。水热法合成试样的物相、形貌和光吸收特性分别被X射线衍射仪(XRD)、扫描电子显微镜(TEM)和紫外可见分光光度计(UV-VIS)表征。研究结果表明:水热法所合成试样的物相均为γ-AlOOH。随着反应温度和pH值的增加,它们都有利于合成长径比大的γ-AlOOH纳米棒。对不同条件下水热法合成γ-AlOOH纳米棒进行紫外可见光的吸收光谱(UV-VIS)分析可得,随着反应温度的升高和pH值的增加,获得γ-AlOOH纳米棒的光吸收能力逐渐是增加的。特别是长径比大的γ-AlOOH纳米棒具有良好的光吸收能力。

γ-AlOOH nanorods with the diameters of around 8 nm and the length of up to 300 nm were successfully synthesized using 1 mol/L AICI3 6H20 as aluminium source and 1 mol/L NaOH as precipitant at 180 ℃ for 48 h with pH = 9 via the hydrothermal method. The phase, the morphologies and the opti transmission cal absorption properties of the samples were characterized by X-ray diffraction （XRD）, electron microscopy （TEM） and ultraviolet-visible absorption spectroscopy （UV-VIS）, respectively. XRD analysis showed that the phase of as obtained samples is γ-AlOOH. TEM analysis confirmed that the increasement of the reaction temperature and the pH value is in favor of the increment of the slenderness ratio of γ-AlOOH nanorods. And UV-VIS measurements show that γ-AlOOH nanorods with the large slenderness ratio have a good optical absorption property.