Controllable synthesis various morphologies of 3D hierarchical MnO x -TiO 2 nanocatalysts for photothermocatalysis toluene and NO with free-ammonia

• Published in: Journal of colloid and interface science Vol. 608; no. Pt 3; p. 3004
• Main Authors: Li, Morui, Wang, Yanhong, Fan, Yinming, Liao, Lei, Zhou, Xiaobin, Mo, Shengpeng, Wang, Hongqiang
• Format: Journal Article
• Language: English
• Published: United States 15-02-2022
• Subjects: Ammonia; Catalysis; Titanium; Toluene; NO; Toluene; Controllable synthesis; Morphologies; Photothermocatalysis
• ISSN: 1095-7103

Via various hydrothermal synthetic conditions, controllable synthesis various morphologies of MnO
-TiO
catalysts for simultaneous removal toluene and NO with free-ammonia under the photothermocatalysis system based on UV light irradiation. The morphologies obtained included 3D hierarchical sheet structure (C sample), 3D hierarchical sheet stacked MnO
-TiO
microspheres (P sample), and 3D hierarchical sticks stacked MnO
-TiO
microspheres (N sample). Compared with other samples, N sample exhibited the excellent catalytic activity for the toluene and NO, with the conversion rates of toluene and NO achieved 72% and 91% at 240 °C, respectively. Using a variety of characterization and analysis methods, it was confirmed that the morphology of the catalysts would affect its catalytic performance by affecting the specific surface area, surface-adsorbed oxygen species, oxygen vacancies, the high-valence atomic species and reducibility. This was the reason why the N sample could show remarkable performance. Moreover, this work demonstrated a new strategy for simultaneously removing toluene and NO with free-ammonia under the photothermocatalysis system based on UV light irradiation.