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Title: Conformal Microfluidic-Blow-Spun 3D Photothermal Catalytic Spherical Evaporator for Omnidirectional Enhanced Solar Steam Generation and CO2 Reduction
Authors: Liu, Hao
Ye, Hong-Gang
Gao, Minmin 
Li, Qing
Liu, Zhiwu
Xie, An-Quan
Zhu, Liangliang
Ho, Ghim Wei 
Chen, Su
Keywords: CO2 reduction
interfacial solar steam generation
microfluidic blow spinning
omnidirectional absorbance
Issue Date: 7-Aug-2021
Publisher: John Wiley and Sons Inc
Citation: Liu, Hao, Ye, Hong-Gang, Gao, Minmin, Li, Qing, Liu, Zhiwu, Xie, An-Quan, Zhu, Liangliang, Ho, Ghim Wei, Chen, Su (2021-08-07). Conformal Microfluidic-Blow-Spun 3D Photothermal Catalytic Spherical Evaporator for Omnidirectional Enhanced Solar Steam Generation and CO2 Reduction. Advanced Science 8 (19) : 2101232. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Solar-driven water evaporation and valuable fuel generation is an environmentally friendly and sustainable way for clean water and energy production. However, a few bottlenecks for practical applications are high-cost, low productivity, and severe sunlight angle dependence. Herein, solar evaporation with enhanced photocatalytic capacity that is light direction insensitive and of efficiency breakthrough by virtue of a three-dimensional (3D) photothermal catalytic spherical isotopic evaporator is demonstrated. A homogeneous layer of microfluidic blow spun polyamide nanofibers loaded with efficient light absorber of polypyrrole nanoparticles conformally wraps onto a lightweight, thermal insulating plastic sphere, featuring favorable interfacial solar heating and efficient water transportation. The 3D spherical geometry not only guarantees the omnidirectional solar absorbance by the light-facing hemisphere, but also keeps the other hemisphere under shadow to harvest energy from the warmer environment. As a result, the light-to-vapor efficiency exceeds the theoretical limit, reaching 217% and 156% under 1 and 2 sun, respectively. Simultaneously, CO2 photoreduction with generated steam reveals a favorable clean fuels production rate using photocatalytic spherical evaporator by secondary growth of Cu2O nanoparticles. Finally, an outdoor demonstration manifests a high evaporation rate and easy-to-perform construction on-site, providing a promising opportunity for efficient and decentralized water and clean fuel production. © 2021 The Authors. Advanced Science published by Wiley-VCH GmbH
Source Title: Advanced Science
ISSN: 2198-3844
DOI: 10.1002/advs.202101232
Rights: Attribution 4.0 International
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