公开(公告)号：US08017036B1

公开(公告)日：2011-09-13

申请号：US12049124

申请日：2008-03-14

申请人： Robert H. Austin ,  Shuang Fang Lim ,  Robert Riehn

发明人： Robert H. Austin ,  Shuang Fang Lim ,  Robert Riehn

IPC分类号： C09K11/08 ,  C09K11/56 ,  C09K11/61

CPC分类号： C09K11/777 ,  B82Y40/00 ,  C09K11/7771

摘要： Methods for forming rare earth element doped oxide, oxyhalide and oxysulfide activated nanoparticles by the following method steps: (a) providing a precursor solution of a water- or alcohol-soluble host metal salt or host metalloid compound and one or more water- or alcohol-soluble rare earth element salts in a polar solution; (b) forming an aerosol of the precursor solution and oxygen; (c) feeding the aerosol to a heated Laval tube (d) igniting the aerosol with a reactive gas flame at the apex of the Laval tube to pyrolyze the salts; and (e) expanding and cooling the pyrolysis gases emerging from the Laval tube so that rare earth element doped nanoparticles precipitate therefrom; wherein one or more of the aerosol particle size, flow rate through the Laval tube and pyrolysis temperature are selected to provide a predetermined particle size and degree of crystallinity without particle aggregation. Rare earth element doped oxide, oxyhalide and oxysulfide activated mono-disperse nanoparticles are also disclosed.

摘要翻译： 通过以下方法步骤形成掺杂稀土元素的氧化物，卤氧化物和氧硫化物活化的纳米颗粒的方法：（a）提供水或醇可溶性主体金属盐或主体准金属化合物和一种或多种水或醇的前体溶液 - 极性溶液中的可溶性稀土元素盐; （b）形成前体溶液和氧气的气溶胶; （c）将气溶胶送入加热的拉瓦尔管（d），在拉瓦尔管的顶点用反应性气体火焰点燃气溶胶以使盐发生热解; 和（e）膨胀和冷却从拉瓦尔管出来的热解气体，使得稀土元素掺杂的纳米颗粒从其中沉淀出来; 其中选择气溶胶颗粒尺寸，通过拉瓦尔管的流速和热解温度中的一种或多种以提供预定的粒度和结晶度而没有颗粒聚集。 还公开了稀土元素掺杂的氧化物，卤氧化物和氧硫化物活化的单分散纳米颗粒。