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Preparation of TiO2/Al-MCM-41 mesoporous materials from coal-series kaolin and photodegradation of methyl orange

Li S., Wu Q., Cui C., Lu G., Zhang C., Zhiye Y.

Materials Science Poland

2013

Vol. 31, No. 3

372--377

TiO2/Al–MCM-41 mesoporous materials were prepared via sol-gel method by loading titania onto Al–MCM-41 mesoporous molecular sieve by hydrothermal treatment from coal-series kaolin as raw material. The TiO2/Al–MCM-41 mesoporous materials were characterized by XRD, FT-IR, HRTEM, N2 adsorption-desorption and the photocatalytic degradation of methyl orange solution under visible light irradiation. The results showed that the TiO2/Al–MCM-41 mesoporous materials possessed a high surface area of 369.9 – 751.3 m2/g and a homogeneous pore diameters of 2.3 – 2.8 nm. The titania crystalline phase was anatase, and the particles size of TiO2 increased with TiO2 content. The Al–MCM-41 mesoporous materials exhibited excellent photodegradation activity under visible-light irradiation for methyl orange.

Photocatalytic Oxidation of Cyclohexene with Molecular Oxygen Using Immobilized Vitamin B12 within Nanoreactors of Al-MCM-41

Farzaneh F., Nouroozi F., Ghandi M.

Polish Journal of Chemistry

2009

Vol. 83, nr 1

123-130

Immobilized vitamin B12 within nanoreactors of Al-MCM-41 (Vit.B12/Al-MCM-41) was used as catalyst in the photooxidation of cyclohexene with molecular oxygen in CH3CN using medium pressure mercury lamp at room temperature. It was found that 99% of cyclohexene was converted to 2-cyclohexene-1-one (70%), 2-cyclohexene-1-ol (15%) and cyclohexene oxide (15%). Details of reaction are discussed.