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Formation of Hierarchical FeCoS2 -CoS2 Double-Shelled Nanotubes with Enhanced Performance for Photocatalytic Reduction of CO2.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-04-28 , DOI: 10.1002/anie.202004609 Yan Wang 1 , Sibo Wang 1 , Song Lin Zhang 1 , Xiong Wen David Lou 1
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-04-28 , DOI: 10.1002/anie.202004609 Yan Wang 1 , Sibo Wang 1 , Song Lin Zhang 1 , Xiong Wen David Lou 1
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Hierarchical FeCoS2–CoS2 double‐shelled nanotubes have been rationally designed and constructed for efficient photocatalytic CO2 reduction under visible light. The synthetic strategy, engaging the two‐step cation‐exchange reactions, precisely integrates two metal sulfides into a double‐shelled tubular heterostructure with both of the shells assembled from ultrathin two‐dimensional (2D) nanosheets. Benefiting from the distinctive structure and composition, the FeCoS2–CoS2 hybrid can reduce bulk‐to‐surface diffusion length of photoexcited charge carriers to facilitate their separation. Furthermore, this hybrid structure can expose abundant active sites for enhancing CO2 adsorption and surface‐dependent redox reactions, and harvest incident solar irradiation more efficiently by light scattering in the complex interior. As a result, these hierarchical FeCoS2–CoS2 double‐shelled nanotubes exhibit superior activity and high stability for photosensitized deoxygenative CO2 reduction, affording a high CO‐generating rate of 28.1 μmol h−1 (per 0.5 mg of catalyst).
中文翻译：
FeCoS2-CoS2双层纳米管的形成，具有增强的光催化还原性能。
FeCoS 2 –CoS 2双壳纳米管经过合理设计和构建，可在可见光下有效还原光催化CO 2。参与两步阳离子交换反应的合成策略将两种金属硫化物精确地整合到一个双壳管状异质结构中，两个壳都由超薄二维（2D）纳米片组装而成。受益于独特的结构和成分，FeCoS 2 -CoS 2杂化物可以减少光激发电荷载流子从表面到表面的扩散长度，以促进其分离。此外，这种杂化结构可以暴露出丰富的活性位点以增强CO 2吸附和依赖表面的氧化还原反应，并通过复杂内部的光散射更有效地收集入射的太阳辐射。结果，这些分层的FeCoS 2 –CoS 2双壳纳米管显示出优异的活性和对光敏脱氧性CO 2还原的高稳定性，从而提供了28.1μmolh -1（每0.5 mg催化剂）的高CO生成速率。
更新日期：2020-07-06
中文翻译：
FeCoS2-CoS2双层纳米管的形成，具有增强的光催化还原性能。
FeCoS 2 –CoS 2双壳纳米管经过合理设计和构建，可在可见光下有效还原光催化CO 2。参与两步阳离子交换反应的合成策略将两种金属硫化物精确地整合到一个双壳管状异质结构中，两个壳都由超薄二维（2D）纳米片组装而成。受益于独特的结构和成分，FeCoS 2 -CoS 2杂化物可以减少光激发电荷载流子从表面到表面的扩散长度，以促进其分离。此外，这种杂化结构可以暴露出丰富的活性位点以增强CO 2吸附和依赖表面的氧化还原反应，并通过复杂内部的光散射更有效地收集入射的太阳辐射。结果，这些分层的FeCoS 2 –CoS 2双壳纳米管显示出优异的活性和对光敏脱氧性CO 2还原的高稳定性，从而提供了28.1μmolh -1（每0.5 mg催化剂）的高CO生成速率。
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