Highly Active of Nanostick-Assembled Hollow Core-Shell Structure Tio2@Mnox for Photothermocatalysis Ethyl Acetate and No with Free-Ammonia at Low Temperature

In this study, a series of self-assembly nanosticks into hollow core-shell structure of TiO2 -MnOx (H1 sample), TiO2 @MnOx (H2 sample) and MnOx @TiO2 (H3 sample) catalysts were prepared, which applied to investigate the resistance to SO2 and H2O, key reaction steps and the possible catalytic mechanism for photothermocatalysis ethyl acetate and NO with free-ammonia at low temperature. The H2 sample exhibited 70% NO conversion and 56% ethyl acetate degradation at 240 ℃ under SO2 and H2O, which might benefit from the protection of active components by hollow structure. Furthermore, the H2 sample loaded with manganese first and then with titanium was favorable for the oxidation of ethyl acetate into small molecule intermediates, thereby improving NO conversion. In addition, the organic by-products during ethyl acetate and NO degradation were determined by GC-MS. The result shown that some small molecular intermediate products were found, such as ethane and ethanol.