Fuel additive-containing lattice-engineered cerium dioxide nanoparticles
    4.
    发明专利
    Fuel additive-containing lattice-engineered cerium dioxide nanoparticles 有权
    含燃料添加剂的工程二氧化碳纳米颗粒

    公开(公告)号:JP2014058448A

    公开(公告)日:2014-04-03

    申请号:JP2013258488

    申请日:2013-12-13

    Abstract: PROBLEM TO BE SOLVED: To provide cerium dioxide nanoparticles CeMOincluding at least one transition metal (M) and a method for preparing such particles.SOLUTION: In a process for forming cerium dioxide nanoparticles including at least one transition metal (M), a product flow including transition metal-containing cerium dioxide nanoparticles CeMO(x bears a value of approximately 0.3 to approximately 0.8) is generated by using a suspension of cerium hydroxide nanoparticles prepared by mechanically shearing an aqueous admixture including an oxidant at an amount effective for oxidizing trivalent cerium ions into tetravalent cerium ions. The nanoparticles thus obtained have a cubic fluorite-type structure, an average rheological diameter of approximately 1 to approximately 10 nm, and a geometric diameter of less than approximately 4 nm. A particle dispersion system within a non-polar medium can be prepared by using transition metal-containing crystalline cerium dioxide nanoparticles.

    Abstract translation: 要解决的问题:提供包含至少一种过渡金属(M)的二氧化铈纳米颗粒CeMO和制备这种颗粒的方法。解决方案:在形成二氧化铈纳米颗粒的方法中,包括至少一种过渡金属(M),产物流 包括含过渡金属的二氧化铈纳米颗粒通过使用通过机械剪切包含氧化剂的水性混合物以有效氧化三价铈离子的量制备的氢氧化铈纳米颗粒的悬浮液来产生CeMO(x值约为0.3至约0.8) 成四价铈离子。 由此获得的纳米颗粒具有立方萤石型结构,平均流变学直径为约1至约10nm,几何直径小于约4nm。 可以通过使用含过渡金属的结晶二氧化铈纳米颗粒来制备非极性介质中的颗粒分散体系。

    Method for producing cerium -containing nanoparticles

    公开(公告)号:AU2011253488A1

    公开(公告)日:2012-12-20

    申请号:AU2011253488

    申请日:2011-05-13

    Abstract: A process for making cerium-containing oxide nanoparticles includes providing an aqueous reaction mixture containing a source of cerous ion, optionally a source of one or more metal ions (M) other than cerium, a source of hydroxide ion, at least one monoether carboxylic acid nanoparticle stabilizer wherein the molar ratio of said monoether carboxylic acid nanoparticle stabilizers to total metal ions is greater than 0.2, and an oxidant at an initial temperature in the range of about 20°C to about 95°C. Temperature conditions are provided effective to enable oxidation of cerous ion to ceric ion, thereby forming a product dispersion of cerium-containing oxide nanoparticles, optionally containing one or more metal ions (M), Ce

    METHOD FOR PRODUCING CERIUM - CONTAINING NANOPARTICLES

    公开(公告)号:CA2798986A1

    公开(公告)日:2011-11-17

    申请号:CA2798986

    申请日:2011-05-13

    Abstract: A process for making cerium-containing oxide nanoparticles includes providing an aqueous reaction mixture containing a source of cerous ion, optionally a source of one or more metal ions (M) other than cerium, a source of hydroxide ion, at least one monoether carboxylic acid nanoparticle stabilizer wherein the molar ratio of said monoether carboxylic acid nanoparticle stabilizers to total metal ions is greater than 0.2, and an oxidant at an initial temperature in the range of about 20°C to about 95°C. Temperature conditions are provided effective to enable oxidation of cerous ion to ceric ion, thereby forming a product dispersion of cerium-containing oxide nanoparticles, optionally containing one or more metal ions (M), Ce1-xMxO2-d, wherein "x" has a value from about 0.0 to about 0.95. The nanoparticles may have a mean hydrodynamic diameter from about 1 nm to about 50 nm, and a geometric diameter of less than about 45 nm.

    STRUCTURED CATALYTIC NANOPARTICLES AND METHOD OF PREPARATION

    公开(公告)号:CA2792409A1

    公开(公告)日:2011-09-15

    申请号:CA2792409

    申请日:2011-03-08

    Abstract: A method for forming a structured doped cerium oxide nanoparticle including the steps of forming a first aqueous cerium(lll) reaction mixture, with optional metal/s other than cerium, a base, and a stabilizer; introducing an oxidant to singly oxidize cerium (III), followed by thermal formation of a doped cerium oxide nanoparticle core; then providing a second reaction mixture of one or more metal ions other than cerium, and optionally cerium (III) ions and sufficient cerium (III) oxidant, followed by thermally converting the mixture into a shell around the doped cerium oxide nanoparticle core, wherein the ratio of metal ions in the core differs from the ratio of metal ions in the shell. The disclosed structured doped cerium oxide nanoparticle may exhibit cubic fluorite crystal structure and possess a diameter in the range 1 nm-20 nm. A dispersion of the developed nanoparticle may be used as a fuel additive.

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