Simultaneous Piezoelectrocatalytic Hydrogen-Evolution and Degradation of Water Pollutants by Quartz MicrorodsFew-Layered MoS2 Hierarchical Heterostructures

© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 32(2020), 34 vom: 01. Aug., Seite e2002875
1. Verfasser: Lin, Yu-Ting (VerfasserIn)
Weitere Verfasser: Lai, Sz-Nian, Wu, Jyh Ming
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article hierarchical heterostructures molybdenum disulfide piezoelectrocatalysis quartz redox reactions wastewater
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520 |a Intense light attenuation in water/wastewater results in photocatalysts exhibiting a low quantum efficiency. This study develops a novel piezoelectrocatalysis system, which involves quartz microrods (MRs) abundantly decorated with active-edge-site MoS2 nanosheets to form a quartz microrodsfew-layered MoS2 hierarchical heterostructure (QMSH). Through theoretical calculations, it is found that the quartz MRs serve as a parallel-plate capacitor, which is self-powered to provide an internal electric field to the few-layered MoS2 nanosheets surrounding the quartz MR surfaces, and the piezoelectric potential (piezopotential) effectively facilitates redox reactions with the free carriers in MoS2 . The self-powered quartz MRs in the QMSH present an internal bias to the MoS2 nanosheets, thus yielding a piezoelectrocatalysis system. An efficient piezoelectrocatalytic hydrogen evolution reaction and decomposition of wastewater without light irradiation can be achieved simultaneously. The second-order rate constant of the QMSH is ≈0.631 L mg-1 min-1 , which is 650-fold that of quartz MRs, indicating that the piezoelectric heterostructural catalysts display exceptionally high efficiency on piezoelectrocatalytic redox reactions rather than in the piezocatalytic process. The H2 -production rate of QMSH catalysts approaches ≈6456 µmo1 g-1 h-1 and peaks at ≈16.8 mmol g-1 in 8 h. The piezoelectrocatalytic process may be a promising method for treating industrial wastewater and producing clean energy 
650 4 |a Journal Article 
650 4 |a hierarchical heterostructures 
650 4 |a molybdenum disulfide 
650 4 |a piezoelectrocatalysis 
650 4 |a quartz 
650 4 |a redox reactions 
650 4 |a wastewater 
700 1 |a Lai, Sz-Nian  |e verfasserin  |4 aut 
700 1 |a Wu, Jyh Ming  |e verfasserin  |4 aut 
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773 1 8 |g volume:32  |g year:2020  |g number:34  |g day:01  |g month:08  |g pages:e2002875 
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