A salt-resistant solar evaporator with organic diradicaloids as photothermal materials for efficient and persistent desalination

Qi, Shuo; Yuan, Liuzhong; Ao, Shuqing; Wang, Luoqing; Jia, Tao; Dou, Chuandong

doi:10.1039/d3ta08075g

J. Mater. Chem. A

2024

DOI: 10.1039/d3ta08075g

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A salt-resistant solar evaporator with organic diradicaloids as photothermal materials for efficient and persistent desalination

Shuo Qi,

Liuzhong Yuan,

Shuqing Ao

et al.

Abstract: A salt-resistant solar evaporator featuring capillary action enabled by loading organic photothermal materials onto a biomass substrate is designed and prepared. The resulting evaporator exhibits high solar-to-vapor efficiency and efficient and persistent water evaporation without salt accumulation.

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Achieving highly interfacial evaporation rate and continuous salt resistance simultaneously via multi-dimensional composite biomimetic evaporator

Zou,

Zhang,

Chen

et al. 2024

Chemical Engineering Journal

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Achieving highly interfacial evaporation rate and continuous salt resistance simultaneously via multi-dimensional composite biomimetic evaporator

Zou,

Zhang,

Chen

et al. 2024

Chemical Engineering Journal

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Spongy polyelectrolyte hydrogel with Janus porous for solar-driven interfacial evaporation and sustainable seawater desalination

Luo,

Tian,

Chen

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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A CuO/ZnO Heterostructure Interpenetrated with Hydrogel Network for Efficient Solar Water Evaporation

Wang,

Zhang,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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Solar-powered interfacial steam generation (ISSG) has been extensively researched and implemented due to its considerable potential for the cost-effective and environmentally sustainable production of purified water. However, the substantial energy requirements for phase change processes in water evaporation, along with the limited light absorption spectrum of photothermal materials seriously impede the further effective deployment of ISSG. Here, a sponge-like CuO/ZnO-PVA/PSS hydrogel (CZO-HH) was prepared by incorporating CuO/ZnO (CZO) heterojunction nanoparticles, known for their excellent photothermal properties, into poly(vinyl alcohol) (PVA) and polystyrene sulfonic acid (PSS) self-assembled interpenetrating double-network hydrogel. Surprisingly, the CZO-HH has identified a novel integration between the nonradiative relaxation effect in semiconductor photothermal materials and the unique structural properties of hydrogels. This synergistic function leads to a decrease in the enthalpy of evaporation by regulating the hydrogen bonding network of water, thereby achieving an enhanced evaporation rate. Moreover, the existence of the PVA/PSS hydrogel broadens the optical absorption spectrum of CZO heterojunction nanoparticles to encompass the full spectrum, while simultaneously enhancing their thermal management capability and the capabilities of the photothermal conversion. Consequently, the CZO-HH had been observed to achieve a maximum evaporation rate of 2.35 kg·m–2·h–1 and an energy efficiency of 95.28% under 1-sun irradiation. Furthermore, the CZO-PVA/PSS demonstrated the capacity for sustainable evaporation in wastewater and seawater desalination, and a significant number of –SO3H groups within the PSS exhibited excellent self-cleaning performance, highlighting the potential for significant long-term practical applications. Therefore, this work reveals the importance of energy management and energy mass transfer in the process of solar energy utilization to enhance the efficiency of photothermal conversion and provides technical support for the next step of large-scale utilization of solar energy and promotion of seawater desalination.

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A salt-resistant solar evaporator with organic diradicaloids as photothermal materials for efficient and persistent desalination

Cited by 3 publications

References 50 publications

Achieving highly interfacial evaporation rate and continuous salt resistance simultaneously via multi-dimensional composite biomimetic evaporator

Achieving highly interfacial evaporation rate and continuous salt resistance simultaneously via multi-dimensional composite biomimetic evaporator

Spongy polyelectrolyte hydrogel with Janus porous for solar-driven interfacial evaporation and sustainable seawater desalination

A CuO/ZnO Heterostructure Interpenetrated with Hydrogel Network for Efficient Solar Water Evaporation

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