Fabrication of heterostructured UIO-66-NH2 /CNTs with enhanced activity and selectivity over photocatalytic CO2 reduction |
| |
| Affiliation: | 1. Department of Environmental Science & Engineering, State Key Laboratory of Multiphase Flow in Power Engineering Xi''an Jiaotong University, Xi''an, 710049, China;2. Department of Applied Chemistry, School of Science, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Electrical Insulation and Power Equipment, Xi''an Jiaotong University, Xi''an, 710049, China;3. Xi''an Jiaotong University Suzhou Institute, Suzhou, 215123, China;4. State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi''an University of Technology, Xi''an, 710048, China;5. ARC Centre of Excellence for Electromaterials Science Intelligent Polymer Research Institute, University of Wollongong, New South Wales, 2522, Australia;1. I3N/CENIMAT, Faculty of Science and Technology, Department of Materials Science, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Campus de Caparica, 2829-516, Caparica, Portugal;2. LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516, Caparica, Portugal;1. Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Gambang, Kuantan, 26300, Pahang, Malaysia;2. Centre for Advanced Materials and Renewable Resources, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM Bangi, 43600, Selangor, Malaysia;3. Centre of Excellence for Advanced Research in Fluid Flow, Universiti Malaysia Pahang, Gambang, Kuantan, 26300, Pahang, Malaysia;1. Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China;2. College of Science, China Agricultural University, Beijing 100083, PR China |
| |
| Abstract: | Developing photocatalysts with superior efficiency and selectivity is an important issue for photocatalytic converting CO2. Hierarchically heterostructured one-dimensional nanomaterials represent a kind of promising catalysts for photocatalytic CO2 reduction on account of the high surface area and synthetic effect between different components. Herein, we synthesized UIO-66-NH2/carbon nanotubes (CNTs) heterostructures via a hydrothermal method, and investigated their photocatalytic performance. The element mapping, X-ray diffraction, and X-ray photoelectron spectroscopy collectively confirmed that the UIO-66-NH2 was successfully loaded on the surface of the CNTs. The specific surface area of the UIO-66-NH2/CNTs is 1.5 times higher than that of UIO-66-NH2. The photocurrent and electrochemical impedance spectroscopy measurements showed that the CNTs could enhance the electron mobility and reduce the recombination of photogenerated electron-hole pairs, which was also confirmed by the Photoluminescence spectroscopy (PL). The CNTs can improve the conductivity of composites and the dispersion of UIO-66-NH2, exposing more active sites, therefore the UIO-66-NH2 can increase the absorption of carbon dioxide and thus enhance the selectivity. The composites remarkably promoted the separation and transition of electrons and thus improved the photocatalytic efficiency of CO2 reduction. More importantly, it was found that the as-prepared composites suppress the hydrogen generation reaction during the CO2 reduction process. |
| |
| Keywords: | Carbon nanotubes Photocatalytic activity Selectivity HCOOH |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
