Photocatalytic degradation of unsymmetrical dimethylhydrazine on TiO₂/SBA-15 under 185/254 nm vacuum-ultraviolet.

ABSTRACT: In this work, TiO₂/SBA-15 was synthesized via an in situ hydrothermal method and was used for vacuum-ultraviolet (VUV) photocatalytic degradation of unsymmetrical dimethylhydrazine (UDMH) for the first time. Compared with photocatalysis under UV irradiation, VUV photocatalysis exhibited higher photodegradation efficiency due to the synergetic effect of direct photolysis, indirect photooxidation and photocatalytic oxidation. The synthesized TiO₂/SBA-15 catalysts exhibited ordered mesoporous structure and anatase phase TiO₂. Titanium content, initial pH and substrate concentration impacted degradation efficiency of UDMH in the VUV photocatalysis process. Among the prepared catalysts, TiO₂/SBA-15 with the molar ratio of Ti/Si = 1 : 3 (

SUBMITTER: Huang Y 

PROVIDER: S-EPMC9036703 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature