tailieunhanh - Báo cáo hóa học: " Template Route to Chemically Engineering Cavities at Nanoscale: A Case Study of Zn(OH)2 Template"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Template Route to Chemically Engineering Cavities at Nanoscale: A Case Study of Zn(OH)2 Template | Nanoscale Res Lett 2010 5 1779-1787 DOI s11671-010-9711-1 NANO EXPRESS Template Route to Chemically Engineering Cavities at Nanoscale A Case Study of Zn OH 2 Template Dapeng Wu Yi Jiang Junli Liu Yafei Yuan Junshu Wu Kai Jiang Dongfeng Xue Received 17 June 2010 Accepted 19 July 2010 Published online 1 August 2010 The Author s 2010. This article is published with open access at Abstract A size-controlled Zn OH 2 template is used as a case study to explain the chemical strategy that can be executed to chemically engineering various nanoscale cavities. Zn OH 2 octahedron with 8 vertices and 14 edges is fabricated via a low temperature solution route. The size can be tuned from 1 to 30 m by changing the reaction conditions. Two methods can be selected for the hollow process without loss of the original shape of Zn OH 2 template. Ion-replacement reaction is suitable for fabrication of hollow sulfides based on the solubility difference between Zn OH 2 and products. Controlled chemical deposition is utilized to coat an oxide layer on the surface of Zn OH 2 template. The abundant hydroxyl groups on Zn OH 2 afford strong coordination ability with cations and help to the coating of a shell layer. The rudimental Zn OH 2 core is eliminated with ammonia solution. In addition ZnO-based heterostructures possessing better chemical or physical properties can also be prepared via this unique templating process. Room-temperature photoluminescence spectra of the heterostructures and hollow structures are also shown to study their optical properties. Keywords Template Zn OH 2 octahedron Ion-replacement reaction Chemical deposition D. Wu Y. Jiang J. Liu Y. Yuan K. Jiang College of Chemistry and Environmental Science Henan Normal University 47 Jianshe Road 453007 Xinxiang China e-mail jiangkai6898@ J. Wu D. Xue Department of Materials Science and Chemical Engineering School of Chemical Engineering Dalian University of Technology 158 Zhongshan Road 116012 .