Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (6): 863-868.DOI: 10.1016/S1872-2067(15)61111-1

• Articles • Previous Articles     Next Articles

Synthesis of bionic-macro/microporous MgO-modified TiO2 for enhanced CO2 photoreduction into hydrocarbon fuels

Fang Wanga,b, Yong Zhoua,c,d, Ping Lic,d, Libang Kuaic,d, Zhigang Zoub,c   

  1. a Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, School of Physics, Nanjing University, Nanjing 210093, Jiangsu, China;
    b Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, Jiangsu China;
    c Ecomaterials and Renewable Energy Research Center (ERERC), Nanjing University, Nanjing 210093, Jiangsu, China;
    d National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory for NanoTechnology, Nanjing University, Nanjing 210093, Jiangsu, China
  • Received:2016-01-29 Revised:2016-04-13 Online:2016-05-30 Published:2016-05-30
  • Contact: Yong Zhou, Zhigang Zou
  • Supported by:

    This work was supported by the National Basic Research Program of China (973 Program, 2014CB239302, 2013CB632404), the Natural Science Foundation of Jiangsu Province (BK20130053), the National Natural Science Foundation of China (51272101, 51202005, 21473091).

Abstract:

The stems of water convolvulus were employed as biotemplates for the replication of their optimized 3D hierarchical architecture to synthesize porous MgO-modified TiO2. The photocatalytic reduction of CO2 with H2O vapor into hydrocarbon fuel was studied with these MgO-TiO2 nanostructures as the photocatalysts with the benefits of improved CO2 adsorption and activation through incorporated MgO. Various factors involving CO2 adsorption capacity, migration of charge carriers to the surface, and the number of activity sites, which depend on the amount of added MgO, determine the photocatalytic conversion efficiency.

Key words: Magnesium oxide, Titanium dioxide, Carbon dioxide photoreduction, Carbon dioxide activiation, Bionic-porous structure, Biotemplate