Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (5): 719-723.doi: 10.1007/s40242-015-4452-4

• Articles • Previous Articles     Next Articles

Rational Fabrication of Size Tunable SnO2 Hollow Microspheres

HUANG Zhiqiang1, GUO Jia1, WANG Xiaoling2, GAO Haiyan1, YU Jianguo1, ZHAO Yongnan1, LI Guodong3   

  1. 1. Institute of Nanostructured Materials & Tianjin Key Laboratory of Fiber Modification and Functional Fiber, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China;
    2. Respiratory Department, Jilin Province People's Hospital, Changchun 130021, P. R. China;
    3. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
  • Received:2014-12-01 Revised:2014-12-29 Online:2015-10-01 Published:2015-02-02
  • Contact: GAO Haiyan, E-mail: gaohaiyan@tipu.edu.cn; ZHAO Yongnan, E-mail: zhaoyn@263.net E-mail:gaohaiyan@tipu.edu.cn;zhaoyn@263.net
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.21271138, 21371070, 21071060), the Natural Science Foundation of Tianjin, China(No.10JCZDJC21500) and the Open Fund of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry of Jilin University, China(No.2015-02).

Abstract:

A designed solution route was developed to fabricate size tunable SnO2 hollow microspheres based on the sol-gel theory. The hydrolysis of SnSO4 released protons to form SnO2 particulates and induced the decrease of pH value. To minimize the high surface energy, the SnO2 particulates tended to assemble into large particles, the size of which was affected by the electrolyte concentration or pH value. Elevating SnSO4 content aroused the decrease of the pH value that directed to the shrinkage of the aggregated particle size of SnO2. Size tunable SnO2 hollow microspheres were then rationally fabricated under solvothermal conditions via Ostwald ripening by simply adjusting the SnSO4 concentration. The in situ pH decrease directed to the shrinkage of the particle size from 270 nm to 112 nm. The formation mechanism was confirmed and rationally elucidated by the time dependant morphology evolution. Charge-discharge tests revealed that the reduced particle size aroused an improved lithium ion battery performance.

Key words: Hollow microsphere, Solvothermal synthesis, Nanocrystalline material, Tin oxide