Preparation and characterization of monodisperse, micrometer-sized, hierarchically porous carbon spheres as catalyst support
Preparation and characterization of monodisperse, micrometer-sized, hierarchically porous carbon spheres as catalyst support
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催化剂载体单分散微米级多孔碳球的制备与表征
DOI：
10.1016/j.cej.2013.12.089
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发表时间：
2014-04
影响因子：
15.1
通讯作者：
Biwang Jiang
中科院分区：
文献类型：
--
作者：
Chao Teng;Yongjia Shang;Lianbing Ren;Biwang Jiang
以D-葡萄糖为碳源，N-甲基-D-葡糖胺（NMGA）修饰的多孔聚合物微球为模板，采用硬模板法，在水热条件下制备了单分散、微米级、多级孔的碳球（PCS）。采用扫描电子显微镜、X射线粉末衍射和N2吸附-脱附等方法对多孔炭球进行了表征。结果表明，PCS具有非晶态胶体结构，具有高度的单分散性和分级的孔径分布。具有这些特征的PCS是负载贵金属纳米颗粒的优良基体。PCS吸附金前体并原位生成Au纳米颗粒（AuNPs）。沉积的金纳米粒子的尺寸为15-30 nm，分散在PCS的孔隙中。制备的金-碳（Au/C）复合微球对4-硝基苯酚（4-NP）具有良好的还原性能。
Monodisperse, micrometer-sized, hierarchically porous carbon spheres (PCS) were successfully fabricated by employing a hard template under hydrothermal condition and followed by further carbonization.D-Glucose and porous polymer microspheres modified with N-methyl-D-glucamine (NMGA) were used as carbon source and template, respectively. The porous carbon spheres were characterized by scanning electron microscopy, X-ray powder diffraction, and N2adsorption–desorption measurements. The results reveal that the PCS with amorphous colloidal structure are highly monodispersed and have a hierarchically pore size distribution. PCS with these features are excellent matrix for loading noble-metal nanoparticles. The PCS adsorb gold precursors and sub-sequently generate in situ Au nanoparticles (AuNPs). The deposited AuNPs with the size of 15–30 nm are well dispersed in PCS’ pores. The resulting gold–carbon (Au/C) composite microspheres show high performance toward the reduction of 4-nitrophenol(4-NP).
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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作者：
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