人工晶体学报
人工晶體學報
인공정체학보
2004年
4期
634-637
,共4页
王新%韩梅娟%魏雨%王延吉
王新%韓梅娟%魏雨%王延吉
왕신%한매연%위우%왕연길
微波诱导%金红石型TiO2%纳米粒子%成核机理
微波誘導%金紅石型TiO2%納米粒子%成覈機理
미파유도%금홍석형TiO2%납미입자%성핵궤리
microwave assistance%rutile titania%nanoparticles%nucleation mechanism
本文报道了一种由TiOCl2液相直接合成金红石型TiO2纳米粒子的新方法,即微波诱导沸腾回流强迫水解法,用该法制备出常规条件下不能得到的产品.所得产物用粉末X射线衍射仪和透射电子显微镜表征,证明产物为金红石型,粒子尺寸5~30nm可控.研究表明,产物物相取决于Ti4+的初始水解速率,水解速率越快,越有利于金红石相成核;通过控制初始Ti4+的浓度,可改变纳米TiO2的粒径.另外还讨论了该金红石型TiO2纳米粒子的成核机理.
本文報道瞭一種由TiOCl2液相直接閤成金紅石型TiO2納米粒子的新方法,即微波誘導沸騰迴流彊迫水解法,用該法製備齣常規條件下不能得到的產品.所得產物用粉末X射線衍射儀和透射電子顯微鏡錶徵,證明產物為金紅石型,粒子呎吋5~30nm可控.研究錶明,產物物相取決于Ti4+的初始水解速率,水解速率越快,越有利于金紅石相成覈;通過控製初始Ti4+的濃度,可改變納米TiO2的粒徑.另外還討論瞭該金紅石型TiO2納米粒子的成覈機理.
본문보도료일충유TiOCl2액상직접합성금홍석형TiO2납미입자적신방법,즉미파유도비등회류강박수해법,용해법제비출상규조건하불능득도적산품.소득산물용분말X사선연사의화투사전자현미경표정,증명산물위금홍석형,입자척촌5~30nm가공.연구표명,산물물상취결우Ti4+적초시수해속솔,수해속솔월쾌,월유리우금홍석상성핵;통과공제초시Ti4+적농도,가개변납미TiO2적립경.령외환토론료해금홍석형TiO2납미입자적성핵궤리.
Rutile TiO2 nanoparticles of controled size were prepared by a very simple forced hydrolysis from TiOCl2 aqueous solution using microwave irradiation. The products were analyzed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The TiO2 particles produced from the present route have spherical structure. The influence of heating power on TiOCl2 solution hydrolytic process was studied and a possible nucleation mechanism of rutile TiO2 nanoparticles was discussed.