A Novel Flake-like Cu7S4 Solar Absorber for High-Performance Large-Scale Water Evaporation
journal contributionposted on 18.06.2019 by Xuejian Li, Zhongping Yao, Jiankang Wang, Dongqi Li, Kailun Yu, Zhaohua Jiang
Any type of content formally published in an academic journal, usually following a peer-review process.
Solar-driven interfacial evaporation has received increasing attention due to its energy conversion efficiency being higher than that of conventional photothermal utilization. Although tremendous photothermal materials for solar-driven interfacial evaporation have been reported, the high cost and complex preparation process hinder their worldwide application. Herein, a Cu7S4 nanosheet on Cu mesh (Cu7S4/Cu mesh) as a novel photothermal material with superior water evaporation performance was rapidly synthesized by a facile wet chemical method. This material owns a high absorptivity of 95.7% within the wavelength range of 0.25–2.5 μm. Meanwhile, a good hydrophilicity makes water wet the material easily, which is favorable for solar-driven interfacial evaporation. The evaporation rate and efficiency of the material reach 1.41 kg m–2 h–1 and 88.1% under 1 kW m–2, respectively, which is three times as large as those without the absorber and also superior to some reported photothermal materials. Moreover, the low-cost, simple, and efficient preparation method is beneficial for large-scale production. This work provides a scalable and facile avenue for synthesizing a highly efficient Cu7S4/Cu mesh solar water evaporation material.