Spontaneous Formation of Noble- and Heavy-Metal-Free Alloyed Semiconductor Quantum Rods for Efficient Photocatalysis
MetadataShow full item record
Quasi-1D cadmium chalcogenide quantum rods (QRs) are benchmark semiconductor materials that are combined with noble metals to constitute QR heterostructures for efficient photocatalysis. However, the high toxicity of cadmium and cost of noble metals are the main obstacles to their widespread use. Herein, a facile colloidal synthetic approach is reported that leads to the spontaneous formation of cadmium-free alloyed ZnSx Se1-x QRs from polydisperse ZnSe nanowires by alkylthiol etching. The obtained non-noble-metal ZnSx Se1-x QRs can not only be directly adopted as efficient photocatalysts for water oxidation, showing a striking oxygen evolution capability of 3000 µmol g-1 h-1 , but also be utilized to prepare QR-sensitized TiO2 photoanodes which present enhanced photo-electrochemical (PEC) activity. Density functional theory (DFT) simulations reveal that alloyed ZnSx Se1-x QRs have highly active Zn sites on the (100) surface and reduced energy barrier for oxygen evolution, which in turn, are beneficial to their outstanding photocatalytic and PEC activities.
Funding and Sponsorship
Showing items related by title, author, creator and subject.
A synthetic strategy for carbon nanospheres impregnated with highly monodispersed metal nanoparticlesYang, T.; Ling, H.; Lamonier, J.; Jaroniec, M.; Huang, J.; Monteiro, M.; Liu, Jian (2016)N-doped mesoporous carbon nanospheres (N-MCN@M) impregnated with uniformly dispersed noble-metal (Au, Pt, Rh, Ru, Ag, Pd and Ir) nanoparticles are rationally designed and synthesized for hydrogenation reactions. This ...
A Complete Review of Cobalt-based Electrocatalysts Applying to Metal-Air Batteries and Intermediate-Low Temperature Solid Oxide Fuel CellsZhou, W.; Wang, X.; Zhu, Y.; Dai, J.; Zhu, Y.; Shao, Zongping (2018)© 2018, Materials Review Magazine. All right reserved. The over-exploitation and over-utilization of fossil fuel resources such as petroleum and coal has aggravated energy and environment problem in the 21st century, and ...
Yang, S.; Peng, L.; Cao, C.; Wei, F.; Liu, Jian; Zhu, Y.; Liu, C.; Wang, X.; Song, W. (2016)© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim We report an efficient and controllable route to prepare magnetic tubular nanoreactors composed of a mesoporous SiO2shell with iron-noble metal nanoparticles inside. The ...