Study of the synthesis, adsorption property, and photocatalytic activity of TiO 2 /coal gasification fine slag mesoporous silica glass microsphere composite.

In this study, TiO 2 /MSGM composite material with adsorption-photocatalytic properties was prepared by extracting mesoporous silica glass microsphere (MSGM) from coal gasification fine slag (CGFS) as a novel TiO 2 carrier. The results of characterization and properties of the composite showed that MSGM could improve the adsorption capacity and photocatalytic activity of the composite by improving the pore structure of the composite, hindering the growth of TiO 2 particles, increasing the phase transition temperature of TiO 2 , enhancing the dispersion of TiO 2 particles. The sample 1:3-TiO 2 /MSGM-2-500 prepared under the optimized conditions possesses satisfactory morphology characteristics, high adsorption capacity, and photocatalytic activity to rhodamine B (RhB). The synergistic effects of adsorption and photocatalytic significantly increase the total removal rate of RhB. This study not only provides a new direction for high-value-added resource utilization of CGFS but also gives a new kind of low-cost carrier material with adsorption property for TiO 2 loading to remove organic dye pollutants.