Layer-by-Layer Self-Assembly of Metal/Metal Oxide Superstructures: Self-Etching Enables Boosted Photoredox Catalysis

Inorganic Chemistry
Hua-Jian LinFang-Xing Xiao

Abstract

The capability of noble metal nanoparticles (NPs) as efficient charge transfer mediators to stimulate Schottky-junction-triggered charge flow in multifarious photocatalysis has garnered enormous attention in the past decade. Nevertheless, fine-tuning and controllable fabrication of a directional charge transport channel in metal/semiconductor heterostructures via suitable interface engineering is poorly investigated. Here, we report the progressive fabrication of a tailor-made directional charge transfer channel in Pt nanoparticles (NPs)-inlaid WO3 (Pt-WO3) nanocomposites via an efficient electrostatic layer-by-layer (LbL) self-assembly integrated with a thermal reduction treatment, by which oppositely charged metal precursor ions and polyelectrolyte building blocks were intimately and alternately assembled on the WO3 nanorods (NRs) by substantial electrostatic interaction. LbL self-assembly buildup and in situ self-etching-induced structural variation of WO3 NRs to a microsized superstructure occur simultaneously. We found that such exquisitely crafted Pt-WO3 nanocomposites exhibit conspicuously enhanced and versatile photoactivities for nonselective mineralizing of organic dye pollution and reduction of heavy metal ions at am...Continue Reading

References

Mar 29, 2007·Chemical Communications : Chem Comm·Xi ZhangHongyu Zhang
Nov 11, 2010·Chemical Reviews·Michael G WalterNathan S Lewis
Jan 25, 2012·Advanced Materials·Joon Seok LeeChan Beum Park
Oct 18, 2012·Chemical Society Reviews·Frank E Osterloh
Nov 30, 2012·Chemical Society Reviews·Yongquan Qu, Xiangfeng Duan
Aug 20, 2014·Journal of the American Chemical Society·David James MartinJunwang Tang
Aug 20, 2019·Chemical Communications : Chem Comm·Ming-Hui HuangFang-Xing Xiao

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