Direct hydrothermal synthesis and characterization of framework-substituted Mn-TiNTs for ODS in complex concentrated liquid waste of herbal decoctions
摘要
Catalytic desulfurization study in concentrated liquid waste of herbal decoctions has attracted more and more attention for meeting the stringent waste water discharge standards but remains a challenge that the catalysts are effectiveness for sulfur-containing organic compound and inorganic compound at the same time. Benzothiophene (BT) was chosen as the simulated compound for sulfur-containing organic, and Na2S was chosen as the simulated compound for sulfur-containing inorganic. The high total sulfur removal was achieved by investigating a new kind of framework-substituted Mn-TiNTs catalyst. The desulfurization rate nearly 90% was found in complex concentrated liquid waste of herbal decoctions under the optimum condition. Additionally, the mechanism of oxidative desulfurization over Mn-doped skeleton heteroatom titanium nanotubes was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM).