Mechanochemically induced sulfur doping in ZnO via oxygen vacancy formation

Physical Chemistry Chemical Physics : PCCP
Y DaikoW Peukert

Abstract

Surface defects of ZnO nanoparticles were induced via mechanical stressing using a Turbula shaker mixer and a planetary ball mill, and the possibilities for surface modification and functionalization of the ZnO nanoparticles were exemplified by sulfur doping of activated ZnO. Raman spectroscopy reveals that the formation of oxygen vacancies (VO) does not only occur under high stressing conditions in a planetary ball mill but even upon rather 'mild stressing' in the shaker mixer. The temporal evolution of the vacancy concentration in ZnO stressed under different conditions can be described by a model that accounts for stress number and vacancy diffusion with diffusion coefficients of VO of 3.7 × 10-21 m2 s-1 and 2.4 × 10-20 m2 s-1 for stressing in the shaker and the planetary ball mill, respectively. The thickness of the VO layer was estimated to be about 1 nm. Thiourea was mixed with defective ZnO particles, and then heated at various temperatures for sulfur-doping. A linear relationship between the amount of induced VO and the level of sulfur doping was found. Remarkably, mechanical activation is indispensable in order to control the level of sulfur doping quantitatively. High-angle annular dark field scanning transmission ele...Continue Reading

References

Dec 29, 2006·Small·Aleksandra B Djurisić, Yu Hang Leung
May 27, 2010·The Journal of Physical Chemistry. B·Yongseon Kim, Shinhoo Kang
Feb 22, 2012·Chemical Reviews·Jianwei LiChang Q Sun
Jul 13, 2012·ACS Applied Materials & Interfaces·Junpeng WangYing Dai
Feb 1, 2013·Chemical Society Reviews·Vladimir ŠepelákPaul Heitjans
Oct 22, 2013·Scientific Reports·Arrigo Calzolari, Marco Buongiorno Nardelli
Aug 30, 2014·Nanoscale·Bei DengMichel A Van Hove

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