Method for producing cerium dioxide nanopowder by flame spray pyrolysis and cerium dioxide nanopowder produced by the method
    1.
    发明授权
    Method for producing cerium dioxide nanopowder by flame spray pyrolysis and cerium dioxide nanopowder produced by the method 有权
    通过火焰喷射热解制备二氧化铈纳米粉末的方法和通过该方法制备的二氧化铈纳米粉末

    公开(公告)号:US08187562B2

    公开(公告)日:2012-05-29

    申请号:US12953668

    申请日:2010-11-24

    IPC分类号: C01F17/00

    摘要: Disclosed is a method for producing a cerium dioxide nanopowder by flame spray pyrolysis. The method comprises dissolving a cerium compound in an organic solvent to prepare a precursor solution, atomizing the precursor solution into microdroplets using an ultrasonic atomizer, transferring the microdroplets together with an argon gas as a carrier gas to a central portion of a high-temperature diffusion flame burner, subjecting the microdroplets to pyrolysis and oxidation in the central portion of the diffusion flame burner to produce a cerium dioxide nanopowder, and collecting the cerium dioxide nanopowder using a collector. According to the method, a cerium dioxide nanopowder can be continuously produced on a large scale by flame spray pyrolysis. In addition, the particle size and uniformity of the cerium dioxide nanopowder can be controlled by appropriately selecting the kind of the solvent and the concentration of the raw material. Furthermore, flame spray pyrolysis allows the cerium dioxide to have a fluorite crystal structure.

    摘要翻译: 公开了通过火焰喷雾热解制备二氧化铈纳米粉末的方法。 该方法包括将铈化合物溶解在有机溶剂中以制备前体溶液,使用超声波雾化器将前体溶液雾化成微滴,将微滴与作为载气的氩气一起转移到高温扩散的中心部分 火焰燃烧器,使微滴在扩散火焰燃烧器的中心部分进行热解和氧化,产生二氧化铈纳米粉末,并使用收集器收集二氧化铈纳米粉末。 根据该方法,二氧化铈纳米粉末可以通过火焰喷射热解大规模连续生产。 此外,可以通过适当选择溶剂的种类和原料的浓度来控制二氧化铈纳米粉末的粒径和均匀性。 此外,火焰喷雾热解允许二氧化铈具有萤石晶体结构。

    METHOD FOR PREPARING NANOPOROUS PT/TIO2 COMPOSITE PARTICLES
    2.
    发明申请
    METHOD FOR PREPARING NANOPOROUS PT/TIO2 COMPOSITE PARTICLES 有权
    制备纳米PT / TIO2复合颗粒的方法

    公开(公告)号:US20120219882A1

    公开(公告)日:2012-08-30

    申请号:US13182727

    申请日:2011-07-14

    CPC分类号: H01M4/926 Y02E60/50

    摘要: The present invention provides a method for preparing nanoporous Pt/TiO2 composite particles, nanoporous Pt/TiO2 composite particles prepared by the above preparation method, and a fuel cell comprising the nanoporous Pt/TiO2 composite particles. The nanoporous Pt/TiO2 composite particles according to the present invention have a catalytic effect similar to that of commercially available Pt/carbon black and, thus, can be applied to a fuel cell.

    摘要翻译: 本发明提供一种制备纳米多孔Pt / TiO2复合颗粒的方法,通过上述制备方法制备的纳米多孔Pt / TiO 2复合颗粒和包含纳米多孔Pt / TiO 2复合颗粒的燃料电池。 根据本发明的纳米多孔Pt / TiO 2复合颗粒具有类似于市售Pt /炭黑的催化效果,因此可以应用于燃料电池。

    Method for preparing nanoporous Pt/TiO2 composite particles
    3.
    发明授权
    Method for preparing nanoporous Pt/TiO2 composite particles 有权
    制备纳米多孔Pt / TiO2复合颗粒的方法

    公开(公告)号:US08986906B2

    公开(公告)日:2015-03-24

    申请号:US13182727

    申请日:2011-07-14

    IPC分类号: H01M4/88 H01M4/92

    CPC分类号: H01M4/926 Y02E60/50

    摘要: The present invention provides a method for preparing nanoporous Pt/TiO2 composite particles, nanoporous Pt/TiO2 composite particles prepared by the above preparation method, and a fuel cell comprising the nanoporous Pt/TiO2 composite particles. The nanoporous Pt/TiO2 composite particles according to the present invention have a catalytic effect similar to that of commercially available Pt/carbon black and, thus, can be applied to a fuel cell.

    摘要翻译: 本发明提供一种制备纳米多孔Pt / TiO2复合颗粒的方法,通过上述制备方法制备的纳米多孔Pt / TiO 2复合颗粒和包含纳米多孔Pt / TiO 2复合颗粒的燃料电池。 根据本发明的纳米多孔Pt / TiO 2复合颗粒具有类似于市售Pt /炭黑的催化效果,因此可以应用于燃料电池。

    METHOD OF MODIFYING SILICA NANOPOWDER SURFACES
    4.
    发明申请
    METHOD OF MODIFYING SILICA NANOPOWDER SURFACES 审中-公开
    二氧化硅纳米粒子表面改性方法

    公开(公告)号:US20100316789A1

    公开(公告)日:2010-12-16

    申请号:US12575505

    申请日:2009-10-08

    IPC分类号: B05D7/00

    摘要: In accordance with one embodiment, a method of modifying the surface of silica nanopowder by a spray heating process is provided. In the method, surface characteristics of silica nanopowder are modified from hydrophilic to hydrophobic. A colloidal suspension including silica nanopowder and a surface modifier which are dissolved in ethanol is sprayed and thermally dried so that the surface characteristics of silica nanopowder are modified by the surface modifier coated on the surface of silica nanopowder. In the method, silica nanopowder surfaces are modified from hydrophilic to hydrophobic by controlling concentration and type of a surface modifier and heating temperature.

    摘要翻译: 根据一个实施方案,提供了通过喷雾加热方法改性二氧化硅纳米粉末的表面的方法。 在该方法中,二氧化硅纳米粉末的表面特性从亲水性改为疏水性。 将包含二氧化硅纳米粉末和溶解在乙醇中的表面改性剂的胶态悬浮液喷雾并热干燥,以便通过涂覆在二氧化硅纳米粉末表面上的表面改性剂改性二氧化硅纳米粉末的表面特性。 在该方法中,通过控制表面改性剂的浓度和类型以及加热温度,将二氧化硅纳米粉末表面从亲水性改性为疏水性。

    Method of fabricating silica-titania nanoporous composite powder
    5.
    发明授权
    Method of fabricating silica-titania nanoporous composite powder 有权
    制备二氧化硅 - 二氧化钛纳米多孔复合粉末的方法

    公开(公告)号:US08070981B2

    公开(公告)日:2011-12-06

    申请号:US12270370

    申请日:2008-11-13

    摘要: Provided is a method of fabricating silica-titania nanoporous composite powder by controlling a pore size. In more particular, a method of fabricating silica-titania nanoporous composite powder, using a spraying and heating reactor including an ultrasonic droplet generator and a cylindrical electric furnace, comprises the steps of: generating droplets of a mixture suspension from a colloidal suspension prepared by mixing silica (SiO2) and titania (TiO2) nanopowders and organic template (PSL: polystyrene latex) powder, by the ultrasonic droplet generator of the spray-heating reactor; generating a silica-titania-organic template nanoporous composite powder having pores within the range of 20˜100 nm in size through preparing silica-titania-organic template (SiO2—TiO2-PLS) composite particles and removing the organic template while passing the mixture suspension in the cylindrical electric furnace by a carrier gas; and collecting the generated nanoporous material by a particle collector.

    摘要翻译: 提供了通过控制孔径来制造二氧化硅 - 二氧化钛纳米多孔复合粉末的方法。 更具体地,使用包括超声波液滴发生器和圆柱形电炉的喷射和加热反应器制备二氧化硅 - 二氧化钛纳米多孔复合粉末的方法包括以下步骤:从通过混合制备的胶体悬浮液产生混合悬浮液的液滴 二氧化硅(SiO 2)和二氧化钛(TiO 2)纳米粉末和有机模板(PSL:聚苯乙烯胶乳)粉末,由喷雾加热反应器的超声波液滴发生器; 通过制备二氧化硅 - 二氧化钛 - 有机模板(SiO 2 -TiO 2 -PLS)复合颗粒并通过混合物悬浮液去除有机模板,从而产生尺寸在20〜100nm范围内的孔的二氧化硅 - 二氧化钛 - 有机模板纳米多孔复合粉末 在圆柱形电炉中用载气; 并通过粒子收集器收集生成的纳米多孔材料。

    METHOD OF FABRICATING SILICA-TITANIA NANOPOROUS COMPOSITE POWDER
    7.
    发明申请
    METHOD OF FABRICATING SILICA-TITANIA NANOPOROUS COMPOSITE POWDER 有权
    制备二氧化硅 - 钛酸钠纳米复合粉末的方法

    公开(公告)号:US20100038586A1

    公开(公告)日:2010-02-18

    申请号:US12270370

    申请日:2008-11-13

    IPC分类号: C09K3/00

    摘要: Provided is a method of fabricating silica-titania nanoporous composite powder by controlling a pore size. In more particular, a method of fabricating silica-titania nanoporous composite powder, using a spraying and heating reactor including an ultrasonic droplet generator and a cylindrical electric furnace, comprises the steps of: generating droplets of a mixture suspension from a colloidal suspension prepared by mixing silica (SiO2) and titania (TiO2) nanopowders and organic template (PSL: polystyrene latex) powder, by the ultrasonic droplet generator of the spray-heating reactor; generating a silica-titania-organic template nanoporous composite powder having pores within the range of 20˜100 nm in size through preparing silica-titania-organic template (SiO2—TiO2—PLS) composite particles and removing the organic template while passing the mixture suspension in the cylindrical electric furnace by a carrier gas; and collecting the generated nanoporous material by a particle collector.The present invention provides the method of fabricating silica-titania nanoporous composite powder by controlling the pore size and the mixing ratio of silica-titania.

    摘要翻译: 提供了通过控制孔径来制造二氧化硅 - 二氧化钛纳米多孔复合粉末的方法。 更具体地,使用包括超声波液滴发生器和圆柱形电炉的喷射和加热反应器制备二氧化硅 - 二氧化钛纳米多孔复合粉末的方法包括以下步骤:从通过混合制备的胶体悬浮液产生混合悬浮液的液滴 二氧化硅(SiO 2)和二氧化钛(TiO 2)纳米粉末和有机模板(PSL:聚苯乙烯胶乳)粉末,由喷雾加热反应器的超声波液滴发生器; 通过制备二氧化硅 - 二氧化钛 - 有机模板(SiO 2 -TiO 2 -PLS)复合颗粒并通过混合物悬浮液去除有机模板,从而产生尺寸在20〜100nm范围内的孔的二氧化硅 - 二氧化钛 - 有机模板纳米多孔复合粉末 在圆柱形电炉中用载气; 并通过粒子收集器收集生成的纳米多孔材料。 本发明提供了通过控制二氧化硅 - 二氧化钛的孔径和混合比来制备二氧化硅 - 二氧化钛纳米多孔复合材料粉末的方法。

    Method for making silica nanoparticles by flame spray pyrolysis adopting two-fluid nozzle
    9.
    发明授权
    Method for making silica nanoparticles by flame spray pyrolysis adopting two-fluid nozzle 有权
    采用双流体喷嘴的火焰喷涂热解制备二氧化硅纳米粒子的方法

    公开(公告)号:US07534410B1

    公开(公告)日:2009-05-19

    申请号:US11530831

    申请日:2006-09-11

    IPC分类号: C01B33/12 C01B33/18 B82B3/00

    摘要: The invention relates to a method for making silica nanoparticles using a flame reactor, which includes a droplet spray having a two-fluid nozzle and a burner of a quintuple tube structure. In this method, droplets of silicon alkoxide as liquid Si compound are sprayed through the droplet spray of the flame reactor. A flame is generated by the flow of inert gas, oxygen, hydrogen and air simultaneously into the burner of the flame reactor. The liquid Si compound is delivered through the flame of the burner to produce silica nanoparticles having a mean particle size ranging from 9 nm to 68 nm. Resultant nanoparticles are collected and recovered in a particle collector. The droplets sprayed under high pressure from a silicon alkoxide solution are directly oxidized in the flame, thereby producing spherical silica nanoparticles.

    摘要翻译: 本发明涉及使用火焰反应器制造二氧化硅纳米颗粒的方法,该方法包括具有双流体喷嘴的液滴喷雾和五重管结构的燃烧器。 在该方法中,通过火焰反应器的液滴喷雾喷射作为液体Si化合物的硅醇盐液滴。 通过惰性气体,氧气,氢气和空气的流动同时进入火焰反应器的燃烧器产生火焰。 液体Si化合物通过燃烧器的火焰输送,产生平均粒径为9nm至68nm的二氧化硅纳米颗粒。 收集所得的纳米颗粒并在颗粒收集器中回收。 在高压下从烷氧基硅溶液喷雾的液滴在火焰中直接氧化,从而产生球形二氧化硅纳米颗粒。

    METHOD FOR MAKING SILICA NANOPARTICLES BY FLAME SPRAY PYROLYSIS ADOPTING TWO-FLUID NOZZLE
    10.
    发明申请
    METHOD FOR MAKING SILICA NANOPARTICLES BY FLAME SPRAY PYROLYSIS ADOPTING TWO-FLUID NOZZLE 有权
    通过火焰喷雾热解制备二氧化硅纳米粒子的方法采用两流体喷嘴

    公开(公告)号:US20090123357A1

    公开(公告)日:2009-05-14

    申请号:US11530831

    申请日:2006-09-11

    IPC分类号: C01B33/12

    摘要: The invention relates to a method for making silica nanoparticles using a flame reactor, which includes a droplet spray having a two-fluid nozzle and a burner of a quintuple tube structure. In this method, droplets of silicon alkoxide as liquid Si compound are sprayed through the droplet spray of the flame reactor. A flame is generated by the flow of inert gas, oxygen, hydrogen and air simultaneously into the burner of the flame reactor. The liquid Si compound is delivered through the flame of the burner to produce silica nanoparticles having a mean particle size ranging from 9 nm to 68 nm. Resultant nanoparticles are collected and recovered in a particle collector. The droplets sprayed under high pressure from a silicon alkoxide solution are directly oxidized in the flame, thereby producing spherical silica nanoparticles.

    摘要翻译: 本发明涉及使用火焰反应器制造二氧化硅纳米颗粒的方法,该方法包括具有双流体喷嘴的液滴喷雾和五重管结构的燃烧器。 在该方法中,通过火焰反应器的液滴喷雾喷射作为液体Si化合物的硅醇盐液滴。 通过惰性气体,氧气,氢气和空气的流动同时进入火焰反应器的燃烧器产生火焰。 液体Si化合物通过燃烧器的火焰输送,产生平均粒径为9nm至68nm的二氧化硅纳米颗粒。 收集所得的纳米颗粒并在颗粒收集器中回收。 在高压下从烷氧基硅溶液喷雾的液滴在火焰中直接氧化,从而产生球形二氧化硅纳米颗粒。