国际材料领域的著名期刊Advanced Functional Materials在最新一期(17，2007，2766-2771)，以内封面文章的形式报道了中科院过程工程所多相复杂系统国家重点实验室朱庆山研究员领导的课题组在材料纳微结构调控方面取得的新进展。
此前，该课题组开展了添加氨基酸调控材料纳微结构的过程工程前沿技术研究并取得阶段性进展。在此基础上，课题组又进一步研究了Cu2O纳微结构的过程调控。通过改变Cu2+/氨基酸比例及其它合成条件，可以实现多种Cu2O纳微结构，包括纳米颗粒、微米实心球、空心正八面体、空心十二面体、多层空心球等不同次的多极结构的调控合成。
课题组的研究表明：与纳米颗粒及微米实心球相比，多层Cu2O空心球具有更好的乙醇气敏性能，可大幅提高对乙醇检测的灵敏度。在纳微结构调控的过程工程研究方面，其价值在于通过优化合成条件，能获得高产率，尺寸均一的多层Cu2O空心球。该研究获得审稿人的高度评价，因此被选择作为内封面文章发表。（中国科学院）
原始出处：
Advanced Functional Materials
Volume 17, Issue 15 , Pages 2766 - 2771
One-Pot Synthesis and Hierarchical Assembly of Hollow Cu2O Microspheres with Nanocrystals-Composed Porous Multishell and Their Gas-Sensing Properties
H. Zhang 1, Q. Zhu 1 *, Y. Zhang 2, Y. Wang 1, L. Zhao 1, B. Yu 1
1Multiphase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Sciences, P.O. Box 353, Beijing 100080 (P.R. China)
2State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, 100080 (P.R. China)
email: Q. Zhu (qszhu@home.ipe.ac.cn)
*Correspondence to Q. Zhu, 1Multiphase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Sciences, P.O. Box 353, Beijing 100080 (P.R. China)
This work is supported by the National Science Foundation of China (NSFC No. 20221603) and the Special Foundation for Nanomaterials of the Knowledge Innovation Projects from the Chinese Academy of Sciences.
Funded by:
National Science Foundation of China; Grant Number: 20221603
Special Foundation for Nanomaterials of the Knowledge Innovation Projects from the Chinese Academy of Sciences
Keywords
Hollow materials ?Microspheres ?Nanocrystals ?Sensors, gas
Abstract
Hierarchical assembly of hollow microstructures is of great scientific and practical value and remains a great challenge. This paper presents a facile and one-pot synthesis of Cu2O microspheres with multilayered and porous shells, which were organized by nanocrystals. The time-dependent experiments revealed a two-step organization process, in which hollow microspheres of Cu2(OH)3NO3 were formed first due to the Ostwald ripening and then reduced by glutamic acid, the resultant Cu2O nanocrystals were deposited on the hollow intermediate microspheres and organized into finally multishell structures. The special microstructures actually recorded the evolution process of materials morphologies and microstructures in space and time scales, implying an intermediate-templating route, which is important for understanding and fabricating complex architectures. The Cu2O microspheres obtained were used to fabricate a gas sensor, which showed much higher sensitivity than solid Cu2O microspheres.
