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    • 2. 发明申请
    • Single-walled carbon nanotube catalysts and method for preparing same
    • 单壁碳纳米管催化剂及其制备方法
    • US20100086472A1
    • 2010-04-08
    • US11602136
    • 2006-11-20
    • Jun MaDavid Moy
    • Jun MaDavid Moy
    • D01F9/12
    • D01F9/127B01J21/005B01J23/002B01J23/005B01J23/78B01J37/0236B01J37/031B01J37/08B01J37/18B01J2523/00B82Y30/00B82Y40/00C01B32/162C01B2202/02B01J2523/22B01J2523/842B01J2523/845B01J2523/41B01J2523/31
    • An activated catalyst capable of selectively growing single-walled carbon nanotubes when reacted with carbonaceous gas is provided. The activated catalyst is formed by reducing a catalyst that comprises a complex oxide. The complex oxide may be of formula Ax-wFwBy-vGvOz wherein x/y≦2; z/y≦4; 0≦w≦0.3x; 0≦v≦0.3y; A is a Group VIII element; F is an element that is different from A but has, in said composition, the same valence state as A; B is an element different from A and F, and is an element whose simple oxide, in which B is at the same valence state as in the complex oxide, is not reducible in the presence of hydrogen gas at a temperature less than about 900° C.; G is an element different from A, B and F, and is an element whose simple oxide, in which G is at the same valence state as in the complex oxide, is not reducible in the presence of hydrogen gas at a temperature less than about 900° C.; and O is oxygen. The complex oxide is reduced at a temperature less that 950° C. Methods of making, uses for and carbon fibril-containing product made with these activated catalysts are also provided.
    • 提供能够与碳质气体反应时能够选择性地生长单壁碳纳米管的活化催化剂。 通过还原包含复合氧化物的催化剂形成活化的催化剂。 复合氧化物可以具有式Ax-wFwBy-vGvOz,其中x / y≦̸ 2; z / y≦̸ 4; 0≦̸ w≦̸ 0.3x; 0≦̸ v≦̸ 0.3y; A是VIII族元素; F是与A不同的元素,在所述组合物中具有与A相同的价态; B是与A和F不同的元素,并且是其中B与复合氧化物处于相同价态的简单氧化物在氢气存在下在小于约900°的温度下不可还原的元素 C。; G是不同于A,B和F的元素,并且是其中G与复合氧化物处于相同价态的简单氧化物的元素在氢气存在下在小于约 900°C。 而O是氧。 复合氧化物在低于950℃的温度下还原。还提供了用这些活化的催化剂制备,用于含有原纤维的产物的方法。
    • 4. 发明申请
    • CARBIDE NANOFIBRILS AND METHOD OF MAKING SAME
    • 碳化硅纳米纤维及其制备方法
    • US20080175782A1
    • 2008-07-24
    • US11841493
    • 2007-08-20
    • David MoyChun-Ming Niu
    • David MoyChun-Ming Niu
    • C01B31/30C01B31/34C01B31/36
    • C04B35/62277B82Y30/00C01B32/90C01B32/956C04B35/62281C04B2235/3418C04B2235/428C04B2235/5264C04B2235/5288C04B2235/5296C04B2235/5481C04B2235/767C04B2235/81C04B2235/9661C30B25/005C30B29/36D01F9/08Y10S977/734
    • A plurality of carbide, such as silicon carbide, tungsten carbide, etc., nanofibrils predominantly having diameters substantially less than about 100 nm and a method for making such carbide nanofibrils. The method includes the steps of: heating a plurality of carbon nanotubes or nanofibrils predominantly having diameters less than about 50 nm in a reaction chamber in the presence of a gas of the form QnAm, where Q is a metal capable of forming a carbide, A is an element or radical and n and m are integers necessary to satisfy valences, such as, for example silicon monoxide, and an inert gas in a reaction vessel to a temperature substantially less than 1700 C but sufficently high to cause substantial reaction of the metal in the gas with the carbon of said carbon nanotubes or nanofibrils to form, in situ, solid carbide nanofibrils, the temperature being sufficiently low to prevent substantial fusing together of individidual ones of said carbide nanofibrils, removing at least a portion of A-based gas from said reaction chamber as said reaction progresses, and maintaining said temperature until substantially all the carbon of said nanotubes or nanofibrils has been converted into Q-based carbide.
    • 多个碳化物,例如碳化硅,碳化钨等,主要具有基本上小于约100nm的直径的纳米原纤维和制造这种碳化物纳米原纤维的方法。 该方法包括以下步骤:在反应室中,在存在下列形式的气体的情况下,加热主要具有小于约50nm直径的碳纳米管或纳米原纤维 其中Q是能够形成碳化物的金属,A是元素或基团,n和m是满足价态所必需的整数,例如一氧化硅,以及反应容器中的惰性气体, 温度基本上小于1700℃,但足够高,导致气体中的金属与所述碳纳米管或纳米原纤维的碳的实质反应,原位形成整体碳化物纳米原纤维,其温度足够低以防止大量熔融在一起 所述碳化物纳米原纤维的单独的,当所述反应进行时,从所述反应室中除去至少一部分A基气体,并保持所述温度,直到所述纳米管或纳米原纤维的基本上全部为碳 转为Q型碳化物。
    • 5. 发明授权
    • Carbide nanofibrils and method of making same
    • 硬质合金纳米纤丝及其制造方法
    • US07393514B2
    • 2008-07-01
    • US11265804
    • 2005-11-02
    • David MoyChun-Ming Niu
    • David MoyChun-Ming Niu
    • C01B31/36
    • C04B35/62277B82Y30/00C01B32/90C01B32/956C04B35/62281C04B2235/3418C04B2235/428C04B2235/5264C04B2235/5288C04B2235/5296C04B2235/5481C04B2235/767C04B2235/81C04B2235/9661C30B25/005C30B29/36D01F9/08Y10S977/734
    • A plurality of carbide, such as silicon carbide, tungsten carbide, etc., nanofibrils predominantly having diameters substantially less than about 100 nm and a method for making such carbide nanofibrils. The method includes the steps of: heating a plurality of carbon nanotubes or nanofibrils predominantly having diameters less than about 50 nm in a reaction chamber in the presence of a gas of the form QnAm, where Q is a metal capable of forming a carbide, A is an element or radical and n and m are integers necessary to satisfy valences, such as, for example silicon monoxide, and an inert gas in a reaction vessel to a temperature substantially less than 1700 C but sufficently high to cause substantial reaction of the metal in the gas with the carbon of said carbon nanotubes or nanofibrils to form, in situ, solid carbide nanofibrils, the temperature being sufficiently low to prevent substantial fusing together of individidual ones of said carbide nanofibrils, removing at least a portion of A-based gas from said reaction chamber as said reaction progresses, and maintaining said temperature until substantially all the carbon of said nanotubes or nanofibrils has been converted into Q-based carbide.
    • 多个碳化物,例如碳化硅,碳化钨等,主要具有基本上小于约100nm的直径的纳米原纤维和制造这种碳化物纳米原纤维的方法。 该方法包括以下步骤:在反应室中,在存在下列形式的气体的情况下,加热主要具有小于约50nm直径的碳纳米管或纳米原纤维 其中Q是能够形成碳化物的金属,A是元素或基团,n和m是满足价态所必需的整数,例如一氧化硅,以及反应容器中的惰性气体, 温度基本上小于1700℃,但足够高,导致气体中的金属与所述碳纳米管或纳米原纤维的碳的实质反应,原位形成整体碳化物纳米原纤维,其温度足够低以防止大量熔融在一起 所述碳化物纳米原纤维的单独的,当所述反应进行时,从所述反应室中除去至少一部分A基气体,并保持所述温度,直到所述纳米管或纳米原纤维的基本上全部为碳 转为Q型碳化物。
    • 7. 发明授权
    • Catalysts for the manufacture of carbon fibrils and methods of use thereof
    • 用于制造碳原纤维的催化剂及其使用方法
    • US06699454B1
    • 2004-03-02
    • US08477576
    • 1995-06-07
    • David MoyAsif Chishti
    • David MoyAsif Chishti
    • D01F912
    • B82Y30/00B01J23/76B01J37/031D01F9/127
    • A method for the manufacture of a catalyst for the production of carbon fibrils comprising contacting a fibril-forming catalyst or precursors of a fibril-forming catalyst with an effective amount of a surfactant and/or polyol. A catalyst for the production of carbon fibrils formed by contacting a fibril-forming catalyst or precursors of a fibril-forming catalyst with an effective amount of a surfactant and/or polyol. Improved carbon fibrils or carbon fibril aggregates free of a continuous carbon thermal overcoat, with graphitic layers substantially parallel to the fibril axis, having a substantially constant diameter from about 1.0 to about 100 nanometers, and possessing enhanced dispersion into other materials and enhanced electrical conductivity in those materials.
    • 一种制备用于生产碳原纤维的催化剂的方法,包括使原纤维形成催化剂或原纤维形成催化剂的前体与有效量的表面活性剂和/或多元醇接触。一种用于生产形成碳原子的催化剂 通过使原纤维形成催化剂或原纤维形成催化剂的前体与有效量的表面活性剂和/或多元醇接触。改进的碳原纤维或不含连续碳热外涂层的碳原纤聚集体,石墨层基本上平行于原纤维 轴,具有约1.0至约100纳米的基本恒定的直径,并且在这些材料中具有增强的其它材料的分散性和增强的导电性。