Figure 6.

Catalytic activity of TiO2 in RB photodegradation. White triangle, sample D by simple THF dissolution of PSt; white circle, sample HD by THF dissolution and preheating; inverted black triangle, sample C by simple calcination; black triangle, sample HC by calcination and preheating.

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