Highly Efficient Solar Steam Generation and Desalination through Gourd‐Flesh Templated Polypyrrole Composite

Author:

Wang Zixuan1,Wang Heng2,Chen Kuiyong1,Liu Yue1,Cui Liang1,Xu Jiangtao1,Liu Jingquan12ORCID

Affiliation:

1. School of Materials Science and Engineering Linyi University Linyi 276000 P. R. China

2. College of Materials Science and Engineering Institute for Graphene Applied Technology Innovation State Key Laboratory of Bio‐Fibers and Eco‐textiles Qingdao University Qingdao 266071 China

Abstract

Solar steam generation (SSG) is regarded as a promising technique due to its potential in seawater desalination. Photothermal conversion materials derived from biomass are good evaporators for SSG because of their sustainability and high efficiency. Herein, 3D‐cylindrical‐structured composite materials based on gourd flesh and polypyrrole (GPPY) are designed and used for high efficient SSG. The polypyrrole layer is deposited on the gourd flesh to provide broad optical absorption ability and high photothermal conversion efficiency. In addition, gourd flesh with porous structure can act as thermal insulators, confine the generated heat within the evaporative surface, and facilitate the efficient transport of water to the photothermally active area. Based on these characteristics of the composite, the evaporator made of GPPY can achieve a high evaporation rate of (1.63 kg m−2 h−1), and a superior photothermal conversion efficiency 95.8% under 1 solar irradiation (1 kW m−2). The GPPY can be expected to be a practical photothermal conversion material for commercial SSG based on its high efficiency and sustainability.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Shandong Province

Publisher

Wiley

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