1 School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China 2 CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China 3 University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Chun-Zhong LI,Tao HE
the National Special Project of International Cooperation in Science and Technology, Ministry of Science and Technology of China(2015DFG62610);National Natural Science Foundation of China(21673052)
Inoue T. ; Fujishima A. ; Konishi S. ; Honda K. Nature 1979, 277 (5698), 637.
λ > 420 nm) photocatalytic activity. Photoreduction of CO2 over CoTe is believed to have undergone via the carbene pathway. The CO2 was photocatalytically reduced into CH4 with a low yield when N, N-dimethylacetamide (DMA) or water was used as the solvent. When the sacrificial agent triethanolamine (TEOA) was introduced into the photocatalytic system, however, the product was CO instead. These results indicated that both the solvent and sacrificial agent can influence the photoreduction of CO2 over the CoTenanocatalyst. Usually, the solubility of CO2 in an organic solvent such as DMA is higher than that in the pure water, leading to a larger product yield. The presence of TEOA may change the adsorption characteristics of CO onto the surface of the CoTe catalyst, as well as enhance the separation efficiency of photogenerated charge carriers, resulting in a change in the activity and selectivity of CO2 photoreduction.