國際材料領(lǐng)域的著名期刊Advanced Functional Materials在最新一期(17,，2007,，2766-2771),，以內(nèi)封面文章的形式報(bào)道了中科院過程工程所多相復(fù)雜系統(tǒng)國家重點(diǎn)實(shí)驗(yàn)室朱慶山研究員領(lǐng)導(dǎo)的課題組在材料納微結(jié)構(gòu)調(diào)控方面取得的新進(jìn)展,。
此前,，該課題組開展了添加氨基酸調(diào)控材料納微結(jié)構(gòu)的過程工程前沿技術(shù)研究并取得階段性進(jìn)展,。在此基礎(chǔ)上,，課題組又進(jìn)一步研究了Cu2O納微結(jié)構(gòu)的過程調(diào)控,。通過改變Cu2+/氨基酸比例及其它合成條件，可以實(shí)現(xiàn)多種Cu2O納微結(jié)構(gòu),，包括納米顆粒,、微米實(shí)心球、空心正八面體,、空心十二面體,、多層空心球等不同次的多極結(jié)構(gòu)的調(diào)控合成。
課題組的研究表明：與納米顆粒及微米實(shí)心球相比,，多層Cu2O空心球具有更好的乙醇?xì)饷粜阅?，可大幅提高對乙醇檢測的靈敏度。在納微結(jié)構(gòu)調(diào)控的過程工程研究方面,，其價值在于通過優(yōu)化合成條件,，能獲得高產(chǎn)率，尺寸均一的多層Cu2O空心球,。該研究獲得審稿人的高度評價,，因此被選擇作為內(nèi)封面文章發(fā)表。（中國科學(xué)院）
原始出處：
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 ([email protected])
*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.
