Figure 3.

Hollow TiO2 particles. Hollow TiO2 particles obtained by calcination of PSt/TiO2 at 600°C (A, sample C) and those by calcination and preheating of PSt/TiO2 particles (B, sample HC).

Wang et al. Nanoscale Research Letters 2012 7:646   doi:10.1186/1556-276X-7-646
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