Direct Z-Scheme Heterojunction of Semicoherent FAPbBr3/Bi2WO6 Interface for Photoredox Reaction with Large Driving Force

H Huang, J Zhao, Y Du, C Zhou, M Zhang, Z Wang… - ACS …, 2020 - ACS Publications
H Huang, J Zhao, Y Du, C Zhou, M Zhang, Z Wang, Y Weng, J Long, J Hofkens, JA Steele
ACS nano, 2020ACS Publications
Metal halide perovskites with direct band gap and strong light absorption are promising
materials for harvesting solar energy; however, their relatively narrow band gap limits their
redox ability when used as a photocatalyst. Adding a second semiconductor component with
the appropriate band structure offsets can generate a Z-scheme photocatalytic system,
taking full advantage of the perovskite's intrinsic properties. In this work, we develop a direct
Z-scheme photocatalyst based on formamidinium lead bromide and bismuth tungstate …
Metal halide perovskites with direct band gap and strong light absorption are promising materials for harvesting solar energy; however, their relatively narrow band gap limits their redox ability when used as a photocatalyst. Adding a second semiconductor component with the appropriate band structure offsets can generate a Z-scheme photocatalytic system, taking full advantage of the perovskite’s intrinsic properties. In this work, we develop a direct Z-scheme photocatalyst based on formamidinium lead bromide and bismuth tungstate (FAPbBr3/Bi2WO6) with strong redox ability for artificial solar-to-chemical energy conversion. With desirable band offsets and strong joint redox potential, the dual photocatalyst is shown to form a semicoherent heterointerface. Ultrafast transient infrared absorption studies employing selective excitation reveal synergetic photocarrier dynamics and demonstrate Z-scheme charge transfer mechanisms. Under simulated solar irradiation, a large driving force photoredox reaction (∼2.57 eV) of CO2 reduction coupled with benzyl alcohol oxidation to benzaldehyde is achieved on the Z-scheme FAPbBr3/Bi2WO6 photocatalyst, harnessing the full synergetic potential of the combined system.
ACS Publications
以上显示的是最相近的搜索结果。 查看全部搜索结果