Citation: YE Yong-Zhou, SHEN Fei, WANG Hong-Ning, CHEN Ruo-Yu, SUN Lin. Preparation of Titania Doped SiO₂ Nanotube Composites with Manganese Loadings for NH₃-SCR Applications[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(11): 2088-2096. doi: 10.11862/CJIC.2018.260 shu

Preparation of Titania Doped SiO₂ Nanotube Composites with Manganese Loadings for NH₃-SCR Applications

YE Yong-Zhou ¹ ,
SHEN Fei ¹ ,
WANG Hong-Ning ¹ ,
CHEN Ruo-Yu ^1,, ,
SUN Lin ^2,3,,

1.
School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
2.
Jiangsu Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equipments; School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
3.
State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China

Corresponding author: CHEN Ruo-Yu, cxdcry@163.com SUN Lin, sunlin1987@126.com
Received Date: 8 July 2018
Revised Date: 11 September 2018

Figures(9)

Ti-containing SiO₂ nanotubes (TiSNTs) were firstly synthesized via a sol-gel and co-polycondensation method. After that, a family of Mn doped TiSNTs (Mn/TiSNTs) catalysts with various Mn loading were prepared via the co-precipitation method. When Si/Ti molar ratio was more than 5, a worm-like tubular morphology was clearly observed. The NH₃-TPD (NH₃-temperature programmed desorption) results show that the Ti doping into the skeleton of the silica nanotubes greatly enhanced the acidic sites of the catalyst and promoted the adsorption and NH₃-SCR (selective catalytic reduction) activation on the surface of the catalyst. Meanwhile, the results of H₂-TPR (H₂-temperature programmed reduction) also show that Ti doping enhanced the redox ability of the catalyst and the capacity of oxygen storage. Moreover, the doped Mn species was beneficial for reducing the reaction temperature. The results of SCR of NO_x with NH₃ show the catalyst with Si/Ti molar ratios of 10 (Mn/Ti(10)SNT) exhibited significant catalytic activity, and the NO conversion rate remained over 90% in the reactive temperature range of 135 to 325℃.
- heterogeneous catalysis,
- supported catalysts,
- silicates,
- nanotubes,
- sol-gel processes
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沈阳化工大学材料科学与工程学院沈阳 110142

Preparation of Titania Doped SiO2 Nanotube Composites with Manganese Loadings for NH3-SCR Applications

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通讯作者: 陈斌, bchen63@163.com

Preparation of Titania Doped SiO₂ Nanotube Composites with Manganese Loadings for NH₃-SCR Applications