Table 1.

The crystallite size, specific surface area, band gap, and morphology of materials.

Catalyst	Crystallite size	SBET	Band gap	Morphology
	nm	(m2g–1)	(nm)
ZnO	65	28	2.93	Hexagonal
Bi2O3	42	15	2.83	Monoclinic
ZnO-CTAB	33	8	2.87	Hexagonal
Bi2O3-CTAB	23	9	2.59	Monoclinic