摘要
以NaOH和NH3·H2O的混合溶液为沉淀剂,在水热条件下制备了大长径比的γ-AlOOH纳米线;并采用X射线衍射仪和透射电子显微镜对制备的产物进行了表征。结果表明：调节混合沉淀剂中NaOH和NH3·H2O的比例,可得到不同形貌的γ-AlOOH纳米结构;大长径比γ-AlOOH纳米线是由水热反应初期形成的尺寸较大的层状γ-AlOOH通过卷曲而形成的;以体积比1∶1的NaOH和NH3·H2O混合溶液为沉淀剂,在保温时间24h条件下,制备的γ-AlOOH纳米线形态最好,其直径为10-30nm,长度为1-2μm,长径比为60-100,并具有明显的晶面择优取向。
Under hydrothermal condition,γ-AlOOH nanowires with large aspect ratio can be synthesized successfully using mixed precipitant of NaOH solution and NH3 · H2 O solution.XRD and TEM were used to characterize the products.The results show that theγ-AlOOH nanostructure with different morphology can be synthesized by adjusting the ratio of NaOH and NH3·H2O.The lamellarγ-AlOOH with large size forming at the early stage of hydrothermal reaction developed intoγ-AlOOH nanowires with large aspect ratio by rolling growth.The bestγ-AlOOH nanowires with diameter of 10-30 nm,length of 1-2μm,aspect ratio of 60-100 and apparent preferred orientation were obtained when the volume ratio of NaOH solution to NH3·H2O solution in the mixed precipitant was 1∶1,and holding time was 24 h.
出处
《机械工程材料》
CAS
CSCD
北大核心
2014年第12期82-86,共5页
Materials For Mechanical Engineering
基金
上海市经信委产学研合作项目(沪CXY-2013-73)
