水热条件对合成勃姆石纳米棒形貌及其光吸收性能的影响  

Influence of hydrothermal conditions on morphologies and optical absorption properties of boehmite nanorods

作　　者：张俊[1] 傅小明[2] 

机构地区：[1]宿迁学院模具教研室,江苏宿迁223800 [2]宿迁学院金属材料教研室

出　　处：《无机盐工业》2015年第2期21-23,70,共4页Inorganic Chemicals Industry

基　　金：江苏省高校自然科学研究基金项目(11KJB450001);宿迁市科技计划项目(Z201201)

摘　　要：以1 mol/L的三氯化铝为铝源和1 mol/L的氢氧化钠为沉淀剂,在水热体系中180℃、p H=9和48 h的条件下成功地合成了径向尺寸小于10 nm的γ-Al OOH纳米棒。合成试样的物相、形貌和光吸收性能分别利用X射线衍射(XRD)、热场发射扫描电子显微镜(FE-SEM)和紫外可见光的吸收光谱仪(UV-Vis)进行表征。研究结果表明:在水热反应体系中,反应温度的升高和p H的增加均有利于合成γ-Al OOH纳米棒。但是,随着反应温度的进一步升高和p H的进一步增加,则有利于获得纳米片状结构的γ-Al OOH。UV-Vis分析可知,γ-Al OOH纳米棒对光的吸收能力大于γ-Al OOH纳米片对光的吸收能力,特别是γ-Al OOH纳米棒长径比的增加有利于其对光的吸收能力增加。Boehmite （y-A1OOH） nanorods of about 10 nm in the radial direction were successfully obtained with 1 mol/L A1C13 solution as aluminium source and 1 mol/L NaOH solution as precipitant at 180 ℃ with pH=9 for 48 h via the hydrothermal method.The phases,morphologies,and optical absorption properties of as-prepared samples were characterized and analyzed with X-ray diffraction （XRD）,field-emission transmission electron microscope （FE-SEM）, and ultraviolet-visible spectrophoto- meter （UV-Vis）,respectively.Results showed that the increasement of the reaction temperature and the pH was in favor of the synthesis of γ-AIOOH nanorods in the hydrothermal reaction system.However,with the further enhancement of the reaction temperature and the pH,it was propitious to prepare γ-A1OOH nanoflakes.The results of UV-Vis analysis showed that the optical absorption ability of γ-A1OOH nanorods was more than that of γ-A1OOH nanoflakes.Especially,γ-A1OOH nanorods had more outstanding optical absorption property as its slenderness ratio increased.

关 键 词：三氯化铝 水热法 γ-AlOOH纳米棒 光吸收性能 

分 类 号：TQ133.1[化学工程—无机化工]