Preparation of large In(OH)3 and In2O3 particles through a seed-mediated growth method in a microreactor  

作　　者：Jingchuo Wang Shaoqing Bai Yujun Wang Guangsheng Luo Tao Wang 

机构地区：[1]State Key Laboratory of Chemical Engineering,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Particuology》2020年第2期1-8,共8页颗粒学报（英文版）

基　　金：This work was financially supported by the National Basic Research Foundation of China(Grant No.2013CB733600);the National Natural Science Foundation of China(Grant Nos.21276140,20976096 and 21036002).

摘　　要：Indium hydroxide(ln(OH)3)and indium oxide(ln2O3)particles are typically synthesized through chemical precipitation methods.In this study,we used a seed-mediated growth method and microreactor-based synthesis process.We synthesized cubic In(OH)3 particles with a crystal size of 172 nm from an 5%(w/v)indium chloride solution.The In2O3 particles synthesized through the thermal decomposition of In(OH)3 particles featured crystals up to 90 nm in size with an average size of 73 nm,which were much larger than the 20-30 nm In2O3 particles synthesized by a traditional precipitation method.The concentrations of the seed and growth solutions were varied from 1%to 7%(w/v).The crystal size of the particles increased with the concentration of the seed and growth solutions;this tendency was the opposite to that observed for the precipitation method.Through the use of a 5%(w/v)seed solution,the flow rate of the growth solution was varied from 1 to 10mL/min,and the resulting crystal size decreased as the flow rate was increased.To understand the reasons for this trend,the growth rate of the crystals was determined at different flow rates(i.e.,1,5,and 10 mL/min).A growth model consistent with the experimental results was established,which demonstrated that slow addition of the growth solution was beneficial for preparing large indium hydroxide particles.

关 键 词：Indium hydroxide Indium oxide Growth model Crystal size Seed-mediated growth 

分 类 号：O61[理学—无机化学]