Scalable Production of Integrated Graphene Nanoarchitectures for Ultrafast Solar-Thermal Conversion and Vapor Generation

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Author(s)
Wu, Shenghao
Xiong, Guoping
Yang, Huachao
Tian, Yikuan
Gong, Biyao
Wan, Huiwen
Wang, Yan
Fisher, Timothy S
Yan, Jianhua
Cen, Kefa
Bo, Zheng
Ostrikov, Kostya Ken
Griffith University Author(s)
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2019
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Abstract

Solar-thermal conversion is a key technology in harvesting solar energy for a diverse range of applications including water vapor generation. However, simultaneously ultrafast and highly efficient solar-thermal conversion and scalable fabrication of materials and devices to achieve such performance in practical applications still remain the key unmet challenges. Here we report a hierarchical nanoarchitecture that integrates vertically oriented graphene nanosheets and highly porous graphene aerogel to achieve ultrafast solar-thermal response (a temperature increase of 169.7°C within 1 s), resulting from superior photonic absorption and excellent thermal insulation. Through engineering surface water pathways and minimizing interfacial thermal resistances, ultrafast solar-thermal response (reaching 100°C within 34 s) and simultaneously high energy efficiency (89.4%) for saturated vapor generation at 10 sun is achieved. Importantly, we demonstrate high-throughput, scalable fabrication of the unique nanoarchitecture. Ultrafast medical sterilization is demonstrated as a potential practical application of this green, nanotechnology-enhanced system for large-scale solar energy harvesting.

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Matter

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1

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4

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Nanotechnology

Science & Technology

Technology

Materials Science, Multidisciplinary

Materials Science

STEAM-GENERATION

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Wu, S; Xiong, G; Yang, H; Tian, Y; Gong, B; Wan, H; Wang, Y; Fisher, TS; Yan, J; Cen, K; Bo, Z; Ostrikov, KK, Scalable Production of Integrated Graphene Nanoarchitectures for Ultrafast Solar-Thermal Conversion and Vapor Generation, Matter, 2019, 1 (4), pp. 1017-1032

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