Synthesis of needle-like pyramid ZnF(OH) microstructures by microwave-assisted heating in ionic liquids

I&EC 119

Jieming Cao, jmcao@nuaa.edu.cn1, Baoqing Fang2, Haiyan Wang2, Xianjia Ma2, Shuanfeng Hu3, and Xiaoyan Zhang3. (1) Nanomaterials Research institute,College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, China, (2) Nanomaterials Research Institute,College of Material Science & Technology, Nanjing University of Aeronautics & Astronautics, 29 Yudao Street, 210016 Nanjing, China, (3) Nanomaterials Research Institute, College of Material Science & Technology, Nanjing University of Aeronautics & Astronautics, 29 Yudao Street, Nanjing, 210016, China
Room-temperature ionic liquids (RTILs) have attracted increased attention in the synthesis of inorganic nano-and micro-materials. In this paper, by combining the advantages of both RTILs and microwave heating, we report a fast, seedless, template-free and environmentally benign green route for the production of needle-like pyramid ZnF(OH) microstructures by microwave-assisted heating in C2OHmimBF4. The RTILs consists of cation and anion. The high ionic conductivity and polarizability of cation make it an excellent microwave absorbing agent, thus leading to a high heating rate and a significantly reduced reaction time. The movement and polarization of ions under the rapidly changing electric field of the microwave result in transient, anisotropic micro-domains for the reaction system, facilitating the anisotropic growth of various microstructures. The products were characterized by XRD, SEM, TEM, and we investigated the morphology variations of microstructures with different conditions. The research was also in process for the particular formation mechanism and potential application.
 

Ionic Liquids: Not Just Solvents Anymore OR Ionic Liquids: Parallel Futures (Sponsored by Green Chemistry and Engineering, Separation Science and Technology and Novel Chemistry with Industrial Applications Sub-Divisions)
8:00 PM-10:00 PM, Sunday, 26 March 2006 Georgia World Congress Center -- Ex. Hall B4, Poster

Division of Industrial and Engineering Chemistry

The 231st ACS National Meeting, Atlanta, GA, March 26-30, 2006