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Engineering Lateral Heterojunction of Selenium‐Coated Tellurium Nanomaterials toward Highly Efficient Solar Desalination

机译:硒覆盖碲纳米材料对高效太阳海水淡化的工程横向异质结

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摘要

Abstract Herein, a core–shell tellurium–selenium (Te–Se) nanomaterial with polymer‐tailed and lateral heterojunction structures is developed as a photothermal absorber in a bionic solar‐evaporation system. It is further revealed that the amorphous Se shell surrounds the crystalline Te core, which not only protects the Te phase from oxidation but also serves as a natural barrier to life entities. The core (Te)–shell (Se) configuration thus exhibits robust stability enhanced by 0.05 eV per Se atom and excellent biocompatibility. Furthermore, high energy efficiencies of 90.71 ± 0.37% and 86.14 ± 1.02% and evaporation rates of 12.88 ± 0.052 and 1.323 ± 0.015 kg m−2 h−1 are obtained under 10 and 1 sun for simulated seawater, respectively. Importantly, no salting out is observed in salt solutions, and the collected water under natural light irradiation possesses extremely low ion concentrations of Na+, K+, Ca2+, and Mg2+ relative to real seawater. Considering the tunable electronic structures, biocompatibilities, and modifiable broadband absorption of the solar spectrum of lateral heterojunction nanomaterials of Te–Se, the way is paved to engineering 2D semiconductor materials with supporting 3D porous hydrophilic materials for application in solar desalination, wastewater treatment, and biomedical ventures.
机译:摘要本文,具有聚合物尾和横向异质结结构的核 - 壳碲 - 硒(TE-SE)纳米材料作为仿生太阳蒸发系统中的光热吸收器开发为光热吸收器。进一步揭示了金属硒壳围绕了结晶Te芯,这不仅保护TE相免受氧化,而且还用作生命实体的自然屏障。因此,核心(TE)-Shell(SE)配置表现出稳健的稳定性增强了0.05eV,每种原子和优异的生物相容性。此外,在10至1℃下,高能量效率为90.71±0.37%和86.14±1.02%和蒸发速率为12.88±0.052和1.323±0.015kg M-2 H-1,分别为模拟海水。重要的是,在盐溶液中没有观察到盐溶液,自然光照射下的收集的水具有相对于真正的海水的极低离子浓度的Na +,K +,Ca2 +和Mg2 +。考虑到TE-SE的横向异质结纳米材料太阳光谱的可调谐电子结构,生物相容性和可改变的宽带吸收,铺设到工程2D半导体材料,其具有支撑3D多孔亲水材料,用于应用太阳脱盐,废水处理和生物医学企业。

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