Multiwalled Carbon Nanotube-TiO₂ Nanocomposite for Visible-Light-Induced Photocatalytic Hydrogen Evolution

Table 1

Summary of the physicochemical properties of MWNT and MWNT-TiO₂ nanocomposite.

Sample	Crystal size^a (nm)	(wt%)	(m^2/g)	Mean pore size^c (nm)	Total volume^d (cm^3/g)
1.25 wt% MWNT-TiO2	12.8	1.5	110.8	10.9	0.35
2.5 wt% MWNT-TiO2	12.1	3.2	97.5	12.4	0.36
5 wt% MWNT-TiO2	12.9	5.7	79.8	12.1	0.28
10 wt% MWNT-TiO2	12.6	9.9	110.1	11.8	0.37
20 wt% MWNT-TiO2	11.8	18.5	166.7	9.1	0.42
MWNT	—	—	392.5	7.6	0.74

^aCalculated by the Scherrer equation.
^bCarbon content determined by TGA-DSC analyses.
^cAverage pore diameter calculated from BJH desorption average pore width (4 V/A).
^dSingle point total pore volume at the relative pressure of ca. 0.995.