Table 2.

Surface parameters and band gap energy of ZnO/SiO₂-PCH samples.

Sample	BET Specific Surface Area (m2/g)	Pore Volume (cc/g)	External Surface Area	Band Gap Energy (eV)
Mt	68.90	0.023	10.8	-
PCH5/MW	706.40	0.295	269.62	3.27
PCH10/MW	561.57	0.284	213.65	3.30
PCH15/MW	538.03	0.237	105.63	3.33
PCH5/HT	687.26	0.269	155.38	3.29
PCH10/HT	663.42	0.278	141.43	3.29
PCH15/HT	648.51	0.218	119.77	3.33