Preparation, characterization and application of a new kind of mesoporous composite

Abstract: The composite oxide CuO/Mn3O4 and its mesoporous composite were prepared through co-precipitation method. The preparation conditions of CuO/Mn3O4 were tested and ascertained as following: Mn:Cu, 2:1; NaOH solution, 25% (w/w); volume, 6mL; without aging; drying temperature, 90°C; calcination temperature, 200°C; calcination time, 3h. CuO/Mn3O4, the mesoporous solid, and the mesoporous composite were characterized by X-ray power diffraction (XRD), high-resolution transmission electron microscope (HRTEM). The HRTEM image showed that CuO/Mn3O4 had been loaded into the pores of the mesoporous solid and the average diameter of CuO/Mn3O4 particles was about 4nm. The specific surface area and the aperture distribution of the mesoporous solid and the mesoporous composite were measured by N2 adsorption. The catalytic activity and stability of CuO/Mn3O4 and the mesoporous composite were evaluated on a small fixed reaction bed and an online GC. The tar and some other harmful components in cigarette smoke can be reduced by using dual-filters containing the mesoporous composite. Comparing with the reference cigarette smoke, the tar, CO, benzo[α] pyrene and tobacco-specific N-nitrosoamines (TSNAs) in the tested cigarette smoke were reduced by 27.2, 23.8, 30.1, and 38.1%, respectively. [Copyright &y& Elsevier]