期刊
ADVANCED SCIENCE
卷 6, 期 19, 页码 -出版社
WILEY
DOI: 10.1002/advs.201900531
关键词
heterojunctions; selenium; solar desalination; tellurium
资金
- Natural Science Foundation of China [81701819, 61671308, 61575089]
- Natural Science Foundation of Guangdong Province [2017A030310495]
- Scientific Research Starting Foundation for the Youth Scholars of Shenzhen University [2019107]
- China Postdoctoral Science Foundation [2017M612712, 2018T110887]
- Shenzhen Personal Maker Foundation [GRCK2017042110482368]
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.
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