Tio2 subsidized periodic mesoporous organosilicate (Tio2 @pmos) for facile photodegradation of methyl orange dye

Abstract

In the present research, we reported TiO2 subsidized periodic mesoporous organosilicates (TiO2 @ PMOS) to reduce organic pollutants by photocatalytic degradation. TiO2 @PMOS was prepared by sim-ply direct adsorbing of TiO2 onto the PMOS and the PMOS organized on polysorbate 80 (C64 H124 O26 ) templates through co-condensation of sodium silicate (Na2 SiO3 ) and 3-methacryloxypropyltrime-thoxysilane (C10 H20 O5 Si). The resultant TiO2 @PMOS were characterized by analytical techniques and showed the successful synthesis of template-assisted PMOS which provided a platform for the preparation of TiO2 @PMOS which exhibited efficient surface area reflected in effective degradation of methyl orange (MO) as an organic azo dye and found 5.36% and 9.02% reduction under visible and UV-lights respectively. Moreover, the addition of H2 O2 with TiO2 @PMOS produced excessive hydroxyl free radicals which improved the degradation abilities up to 14.55% and 64.63% under visible and under UV-conditions. Results showed that PMOS provided well-support to TiO2 for photo-degrada-tion of MO due to the availability of long life-time to photo-generated electron–hole pairs. This profi-cient degradation is recognized to specific incapacitation of metallic nodes into the porous structure of PMOS. Moreover, TiO2 @PMOS were reused several times and showed 53% photocatalytic degradation of MO at optimized conditions. The small decrease in degradation competency of TiO2 @PMOS after several cycles also showed their durability to longtime for the reduction of organic pollutants.