Preparation and Anti-pollution Properties of Carbonized Rice Husk/Polypyrrole Janus Solar Evaporator

doi:10.7503/cjcu20250019

Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (8): 20250019.doi: 10.7503/cjcu20250019

• Physical Chemistry • Previous Articles Next Articles

Preparation and Anti-pollution Properties of Carbonized Rice Husk/Polypyrrole Janus Solar Evaporator

WANG Zhenyu, FANG Wei(), ZHAO Lei, CHEN Hui, WANG Daheng, HE Xuan, DU Xing, LI Weixin

State Key Laboratory of Advanced Refractories，Wuhan University of Science & Technology，Wuhan 430081，China

Received:2025-01-17 Online:2025-08-10 Published:2025-04-30
Contact: FANG Wei E-mail:fangwei@wust.edu.cn
Supported by:
the National Natural Science Foundation of China(22105151);the Key Research Program of Hubei Province, China(2022BAA094);the Natural Science Foundation of Hubei Province, China(2024AFB836);the Knowledge Innovation Project of Wuhan, China(2022010801010306);the Open Project of Key Laboratory of Green Chemical Engineering Process of Ministry of Education, China(GCP2022003);the Youth Science and Technology Zhaoyang Program of Wuhan, China(whkx202203);“The 14th Five Year Plan” Hubei Provincial Advantaged Characteristics Disciplines(groups) Project of Wuhan University of Science and Technology, China(2023A0305)

Abstract

Abstract:

Harvesting clean water from seawater and wastewater based on solar-driven evaporators is emerging as one of the most promising ways to alleviate the shortage of water resources today. However， it also faces a typical defect of massive deposition of salts and pollutants in the functional evaporator， which generally influences the cyclic evaporation performance of the device. To address this problem， in this work a featured foam with a 3D porous structure was first prepared by combining polyurethane foam and carbonized rice husk powders. Then， the hydrophobic polypyrrole was introduced in the upper layer of this foam matrix to construct a Janus solar evaporator with asymmetric wettability while the upper layer shows hydrophobicity and the lower layer allows hydrophilicity. The results indicated the Janus solar evapovator demonstrates a maximum brine evaporation rate of 1.33 kg·m^‒2·h^‒1 and wastewater evaporation rate of 1.29 kg·m^‒2·h^‒1 under solar irradiation of 1 kW/m²， combining with good cycle stability. In addition， the introduction of organic polyurethane networks also endows the Janus evaporator with excellent structural stability， which can be fabricated and tailored to various sizes and shapes for large-scale application.

Key words: Carbonized rice husk, Polypyrrole, Janus structure, Solar-driven evaporator, Anti-pollution property

CLC Number:

0644

TrendMD:

WANG Zhenyu, FANG Wei, ZHAO Lei, CHEN Hui, WANG Daheng, HE Xuan, DU Xing, LI Weixin. Preparation and Anti-pollution Properties of Carbonized Rice Husk/Polypyrrole Janus Solar Evaporator[J]. Chem. J. Chinese Universities, 2025, 46(8): 20250019.

Figures/Tables 11

References 23

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Preparation and Anti-pollution Properties of Carbonized Rice Husk/Polypyrrole Janus Solar Evaporator

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