Figure 7.

TEM images of the as-prepared products at 200°C for different reaction times. (a) 1 h, (b) 3 h, (c and d) 6 h, and (e and f) 12 h.

Zheng et al. Nanoscale Research Letters 2013 8:166   doi:10.1186/1556-276X-8-166
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