title: Shape-Controlled Synthesis of High-Quality Cu7S4Nanocrystals for Efficient Light-Induced Water Evaporation.
abstract: Copper sulfides (Cu2-xS), are a novel kind of photothermal material exhibiting significant photothermal conversion efficiency, making them very attractive in various energy conversion related devices. Preparing high quality uniform Cu2-xS nanocrystals (NCs) is a top priority for further energy-and sustainability relevant nanodevices. Here, a shape-controlled high quality Cu7S4NCs synthesis strategy is reported using sulfur in 1-octadecene as precursor by varying the heating temperature, as well as its forming mechanism. The performance of the Cu7S4NCs is further explored for light-driven water evaporation without the need of heating the bulk liquid to the boiling point, and the results suggest that as-synthesized highly monodisperse NCs perform higher evaporation rate than polydisperse NCs under the identical morphology. Furthermore, disk-like NCs exhibit higher water evaporation rate than spherical NCs. The water evaporation rate can be further enhanced by assembling the organic phase Cu7S4NCs into a dense film on the aqueous solution surface. The maximum photothermal conversion efficiency is as high as 77.1%.
authors.affiliation: School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China.|Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Changbo
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Cong
authors.initials: C
authors.lastname: Yan
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Zhenjie
authors.initials: Z
authors.lastname: Xue
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Yu
authors.affiliation: School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China. ydxie@zzu.edu.cn.
authors.forename: Yinde
authors.initials: Y
authors.lastname: Xie
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China. wangtie@iccas.ac.cn.
authors.forename: Tie
authors.initials: T
authors.lastname: Wang
keywords: Cu7S4; ODE-Sulfur precursors; light-induced water evaporation; monodisperse