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NiO microspheres with tunable porosity and morphology effects for CO oxidation

机译:具有可调孔隙率和形态效应的NIO微球以氧化

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摘要

Hierarchiral NiO flower-like microspheres with tunable porosity were prepared based on a facile solvothermal method. Three kinds of NiO micro-flowers (NiO-A, NiO-B, and NiO-C) with different porosity have been fabricated mainly by tuning the concentration of nickel nitrate. These flower-like microspheres are comprised of densely packed irregular sheets and display a multi-peaks pore distribution in a wide range in both mesoporous and macroporous regions. The BET surface area of NiO-A, NiO-B and NiO-C is 59.9 m~2 g~(-1), 50.2 m~2 g~(-1) and 15.1 m~2 g~(-1) respectively. The pore volume of NiO-A, NiO-B and NiO-C is 0.2214 cm~3 g~(-1), 0.0829 cm~3 g~(-1) and 0.0549 cm~3 g~(-1), respectively. These NiO spheres show a strong morphology dependant nature for CO oxidation catalysis. Compared to the conventional NiO nanoparticles, these flower-like NiO micro-spheres possess a superior catalytic activity for CO oxidation.
机译:基于便捷的溶剂热法制备了层状尼奥花样微球。 两种具有不同孔隙率的NiO微流(NiO-A,NiO-B和NiO-C)的主要是通过调整硝酸镍的浓度来制造。 这些花样的微球由密集的不规则床单组成,并在介孔和大孔区域中显示了宽范围内的多峰孔分布。 NIO-A,NIO-B和NIO-C的BET表面积分别为59.9 m〜2 g〜(-1),50.2 m〜2 g〜(-1)和15.1 m〜2 g〜(-1) 。 NIO-A,NIO-B和NIO-C的孔体积分别为0.2214 cm〜3 g〜(-1),0.0829 cm〜3 g〜(-1)和0.0549 cm〜3 g〜(-1) 。 这些NIO球体对CO氧化催化的形态依赖性很强。 与常规的Nio纳米颗粒相比,这些花样的Nio微球具有具有优质的催化活性来氧化。

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