用于合成具有高比表面积的Nb2O5改性块状镍催化剂的化学沉淀法
Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area.
作者信息
Li Chuang, Jin Shaohua, Guan Weixiang, Tsang Chi-Wing, Chu Wing-Kin, Lau Wai Kin, Liang Changhai
机构信息
Laboratory of Advanced Materials and Catalytic Engineering, School of Chemical Engineering, Dalian University of Technology.
Faculty of Science and Technology, Technological and Higher Education Institute of Hong Kong;
出版信息
J Vis Exp. 2018 Feb 19(132):56987. doi: 10.3791/56987.
We demonstrate a method for the synthesis of NixNb1-xO catalysts with sponge-like and fold-like nanostructures. By varying the Nb:Ni ratio, a series of NixNb1-xO nanoparticles with different atomic compositions (x = 0.03, 0.08, 0.15, and 0.20) have been prepared by chemical precipitation. These NixNb1-xO catalysts are characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy. The study revealed the sponge-like and fold-like appearance of Ni0.97Nb0.03O and Ni0.92Nb0.08O on the NiO surface, and the larger surface area of these NixNb1-xO catalysts, compared with the bulk NiO. Maximum surface area of 173 m/g can be obtained for Ni0.92Nb0.08O catalysts. In addition, the catalytic hydroconversion of lignin-derived compounds using the synthesized Ni0.92Nb0.08O catalysts have been investigated.
我们展示了一种合成具有海绵状和褶皱状纳米结构的NixNb1-xO催化剂的方法。通过改变Nb:Ni比例，采用化学沉淀法制备了一系列具有不同原子组成（x = 0.03、0.08、0.15和0.20）的NixNb1-xO纳米颗粒。这些NixNb1-xO催化剂通过X射线衍射、X射线光电子能谱和扫描电子显微镜进行表征。研究揭示了Ni0.97Nb0.03O和Ni0.92Nb0.08O在NiO表面呈现出海绵状和褶皱状外观，并且与块状NiO相比，这些NixNb1-xO催化剂具有更大的表面积。对于Ni0.92Nb0.08O催化剂，可获得最大表面积为173 m²/g。此外，还研究了使用合成的Ni0.92Nb0.08O催化剂对木质素衍生化合物进行催化加氢转化。
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