Controlling the Particle Size of ZrO2 Nanoparticles in Hydrothermally Stable ZrO2/MWCNT Composites

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• 作者：Changchang Liu ; Sungchul Lee ; Dong Su ; Byeongdu Lee ; Sungsik Lee ; Randall E. Winans ; Chunrong Yin ; Stefan Vajda ; Lisa Pfefferle ; Gary L. Haller
• 刊名：Langmuir
• 出版年：2012
• 出版时间：December 11, 2012
• 年：2012
• 卷：28
• 期：49
• 页码：17159-17167
• 全文大小：668K
• 年卷期：v.28,no.49(December 11, 2012)
• ISSN：1520-5827

文摘

The composite of multiwalled carbon nanotubes (MWCNTs) decorated with ZrO₂ nanoparticles, synthesized by a grafting method followed by high-temperature annealing, was studied. The oxygen functionalized MWCNT surface uniformly disperses and stabilizes the oxide nanoparticles to an extent that is controlled by the metal oxide loading and thermal annealing temperature. This ZrO₂/MWCNT also withstands decomposition in a hydrothermal environment providing potential applications in the catalysis of biomass conversion (e.g., aqueous phase reforming). The ZrO₂/MWCNT have been characterized by (scanning) transmission electron microscopy ((S)TEM), X-ray diffraction (XRD), in situ small-angle X-ray scattering (SAXS), in situ wide-angle X-ray scattering (WAXS), and near edge X-ray fine structure (NEXAFS) for the purpose of a comprehensive analysis of the ZrO₂ particle size and particle size stability.