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由细菌纤维素和陶瓷前驱体聚合物制备的分级多孔氧化锆整体材料。

Hierarchically Porous Zirconia Monolith Fabricated from Bacterial Cellulose and Preceramic Polymer.

作者信息

Zhang Bo-Xing, Zhang Yubei, Luo Zhenhua, Han Weijian, Qiu Wenfeng, Zhao Tong

机构信息

South China Advanced Institute for Soft Matter Science and Technology (AISMST), South China University of Technology (SCUT), 381 Wushan Road, Tianhe District, Guangzhou 510640, China.

Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing 100190, China.

出版信息

ACS Omega. 2018 Apr 30;3(4):4688-4694. doi: 10.1021/acsomega.8b00098.

DOI:10.1021/acsomega.8b00098
PMID:31458690
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6641484/
Abstract

A hierarchically porous zirconia (ZrO) monolith was successfully fabricated by using bacterial cellulose (BC) as a biotemplate and preceramic polymer as a zirconium resource, via freeze-drying and two-step calcination process. Images of scanning electron microscopy showed that the ZrO monolith well-replicated a three-dimensional reticulated structure of pristine BC and possessed good morphology stability till 1100 °C in air. Results of N adsorption/desorption and mercury porosimetry analysis revealed the hierarchically porous structure and large specific area (9.7 m·g) of the ZrO monolith, respectively. Patterns of X-ray powder diffraction indicated that the monoclinic phase and tetragonal phase coexisted in the ZrO monolith with the former as the main phase. In addition, the ZrO monolith possessed low bulk density (0.13 g·cm) and good mechanical strength. These properties suggest that the as-prepared ZrO monolith has a great potential to serve as an ideal catalyst or catalyst support.

摘要

通过使用细菌纤维素（BC）作为生物模板和陶瓷前驱体聚合物作为锆源，经冷冻干燥和两步煅烧工艺，成功制备了一种具有分级多孔结构的氧化锆（ZrO）整体材料。扫描电子显微镜图像显示，ZrO整体材料很好地复制了原始BC的三维网状结构，并且在空气中直至1100°C都具有良好的形态稳定性。N2吸附/脱附和压汞法分析结果分别揭示了ZrO整体材料的分级多孔结构和较大的比表面积（9.7 m²·g⁻¹）。X射线粉末衍射图谱表明，ZrO整体材料中以单斜相为主相，同时存在四方相。此外，ZrO整体材料具有较低的堆积密度（0.13 g·cm⁻³）和良好的机械强度。这些特性表明，所制备的ZrO整体材料作为理想的催化剂或催化剂载体具有巨大的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/6b526e8a178e/ao-2018-00098z_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/19c78a03ff78/ao-2018-00098z_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/f68a5b0547c6/ao-2018-00098z_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/784e1e9b7ff9/ao-2018-00098z_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/73293d5654d6/ao-2018-00098z_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/7da01502b79d/ao-2018-00098z_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/6b526e8a178e/ao-2018-00098z_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/19c78a03ff78/ao-2018-00098z_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/f68a5b0547c6/ao-2018-00098z_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/784e1e9b7ff9/ao-2018-00098z_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/73293d5654d6/ao-2018-00098z_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/7da01502b79d/ao-2018-00098z_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5e8f/6641484/6b526e8a178e/ao-2018-00098z_0006.jpg

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