标题:Aqueous Isolation of 17-Nuclear Zr/Hf Oxide Clusters during the Hydrothermal Synthesis of ZrO2/HfO2
作者:Sun, Qing; Liu, Caiyun; Zhang, Guanyun; Zhang, Jian; Tung, Chen-Ho; Wang, Yifeng
作者机构:[Sun, Qing; Liu, Caiyun; Zhang, Guanyun; Tung, Chen-Ho; Wang, Yifeng] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China.; 更多
通讯作者:Wang, YF;Zhang, J;Zhang, Jian
通讯作者地址:[Wang, YF]Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China;[Zhang, J]Shandong Univ, State Key Lab Crystal Mat, Jinan 25010 更多
来源:CHEMISTRY-A EUROPEAN JOURNAL
出版年:2018
卷:24
期:55
页码:14701-14706
DOI:10.1002/chem.201801267
关键词:crystallization mechanisms; IVB elements; metal oxide clusters;; prenucleation clusters; ZrO2
摘要:Novel 17-nuclear Zr/Hf oxide clusters ({Zr-17} and {Hf-17}) are isolated from aqueous systems. In the clusters, Zr/Hf ions are connected through mu(3)-O, mu(3)-OH, and mu(2)-OH linkages into a pinwheel core which is wrapped with SO42-, HCOO-, and aqua ligands. Octahedral hexanuclear Zr/Hf oxide clusters ({Zr-6}(oct) and {Hf-6}(oct)) are also isolated from the same hydrothermal system by decreasing the synthesis temperature. Structures, synthetic conditions, vibrational spectra, and ionic conductivity of the clusters are studied. Structural studies and synthesis inspection suggest that formation of {Zr-6}(oct) and {Zr-17} involves assembly of the same transferable building blocks, but the condensation degree and thermodynamic stability of the products increase with hydrothermal temperature. The role of {Zr-6}(oct) and {Zr-17} in the formation of ZrO2 nanocrystals are then discussed in the scenario of nonclassical nucleation theory. In addition, the Zr oxide clusters exhibit ionic conductivity owing to the mobility of protons. This study not only adds new members to the Zr/Hf oxide cluster family, but also establishes a connection from Zr4+ ions to ZrO2 in the hydrothermal preparation of zirconium oxide nanomaterials.
收录类别:EI;SCOPUS;SCIE
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052972844&doi=10.1002%2fchem.201801267&partnerID=40&md5=1d6ff5cf4d02db5dd4912e5ae9d659b5
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