Amine-Functionalized ZnO Nanosheets for Efficient CO₂ Capture and Photoreduction.
Amine-functionalized ZnO nanosheets were prepared through a one-step hydrothermal method by using monoethanolamine, which has a hydroxyl group, for covalent attachment on ZnO and a primary amine group to supply the amine-functionalization. We demonstrate that the terminal amine groups on ZnO surfaces substantially increase the capability of CO₂ capture via chemisorption, resulting in effective CO₂ activation. As a result, the photogenerated electrons from excited ZnO can more readily reduce the surface-activated CO₂, which thereby enhances the activity for photocatalytic CO₂ reduction.
School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore. liao0045@e.ntu.edu.sg.
Yusen
Y
Liao
School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore. huzh0007@e.ntu.edu.sg.
Zhaoning
Z
Hu
School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore. guquan@ntu.edu.sg.
Quan
Q
Gu
School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore. cxue@ntu.edu.sg.
Can
C
Xue
D000327:Adsorption; D000588:Amines / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry / Q000302:isolation & purification*; D002384:Catalysis; D017752:Greenhouse Effect; D049329:Nanostructures / Q000737:chemistry*; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D012993:Solar Energy; D013499:Surface Properties; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
D000588:Amines; D002245:Carbon Dioxide; D015034:Zinc Oxide
CO2 reduction; photocatalysis; solar fuels; zinc oxide