Constructing Z-scheme SnO2/N-doped carbon quantum dots/ZnSn(OH)6 nanohybrids with high redox ability for NOx removal under VIS-NIR light
文献情報
Haiwei Li, Wingkei Ho, Shun Cheng Lee
Photocatalysts with a wide optical response range and high oxidation ability are essential for their application in air pollution control. In this study, mesoporous SnO2/NCDs/ZnSn(OH)6 (NCDs = N-doped carbon quantum dots) Z-scheme nanohybrids were synthesized for the first time using an in situ strategy. The ternary Z-scheme catalysts showed significantly enhanced visible and near-infrared light-driven photocatalytic activities for nitric oxide (NO) removal (37%), while the toxic nitrogen dioxide (NO2) intermediate was suppressed completely. The Z-schematic transfer mechanism was confirmed through characterizing the intrinsic properties of the as-prepared sample. The NCDs, as an electron transport bridge, improve both the broad-spectrum light-harvesting ability and the rapid separation of photoinduced electrons. Compared with the binary counterparts, the SnO2/NCDs/ZnSn(OH)6 ternary nanohybrid can generate more reactive oxygen-containing radicals during the photocatalytic reaction, owing to its ability to supply sufficient free surface OH. This study provides insights into the heterogeneous photocatalytic Z-scheme reaction mechanism.
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掲載誌
Journal of Materials Chemistry A

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment














