Transition metal oxide loaded MCM catalysts for photocatalytic
degradation of dyes
DIVYA JYOTHIa, PARAG A DESHPANDEb, B R VENUGOPALa,
SRINIVASAN CHANDRASEKARANa and GIRIDHAR MADRASb,*
aDepartment of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India
bDepartment of Chemical Engineering, Indian Institute of Science, Bangalore 560 012, India
Abstract. Transition metal oxide (TiO2, Fe2O3, CoO) loaded MCM-41 and MCM-48 were synthesized by
a two-step surfactant-based process. Nanoporous, high surface area compounds were obtained after calcination
of the compounds. The catalysts were characterized by SEM, XRD, XPS, UV-vis and BET surface area
analysis. The catalysts showed high activity for the photocatalytic degradation of both anionic and cationic
dyes. The degradation of the dyes was described using Langmuir–Hinshelwood kinetics and the associated rate
parameters were determined.
Graphical Abstract. Transition metal oxide-impregnated MCM catalysts were synthesized using a
surfactant-assisted process and tested for the photocatalytic degradation of dyes.
CoO-impregnated MCM-48 showed higher activity than that of commercial
Keywords. Mesoporous materials; characterization; photocatalytic degradation; metal oxide doping.