Table 2.

Crystallite size of TiO₂ in Pure TiO₂ and MWCNT–TiO₂ photocatalysts.

Samples prepared under different conditions	Crystallite size (nm)
Pure TiO2	44.7
7.2 wt % MWCNTs	33.1
18.9 wt % MWCNTs	30.1
31.7 wt % MWCNTs	29.9
48.2wt % MWCNTs	30.6
51.6 wt % TiO2	23.2
68.4 wt % TiO2	26.7
81.1 wt % TiO2	30.1
89.6 wt % TiO2	35.2
120°C	24.2
150°C	26.7
180°C	27.3
210°C	28.4
24 h	25.5
48 h	26.5
72 h	26.7

Reprinted from An et al. (2012), Copyright 2012, with permission from American Chemical Society.