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

Advanced Science

Zhengchun Peng¹  Yizhen Liu²  Zhipeng Liu²  Liping Liu³  Faliang Cheng⁴  Jiangqing Li⁵  Houkai Chen⁶  Jiagen Li⁷  Xi Zhu⁷  Chuanhong Zhou⁸  Jinlai Zhao⁸  Dianyuan Fan⁸  Qichen Huang⁸  Dazhou Huang⁸  Shiyou Chen⁸  Chenyang Xing⁸  Han Zhang⁸ 

[1] Center for Stretchable Electronics and Nanoscale Systems Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China;College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 China;Department of Hepatobiliary and Pancreatic Surgery Shenzhen People's Hospital Second Clinical Medical College of Jinan University Shenzhen 518060 China;Dongguan University of Technology Dongguan 523808 China;Faculty of Information Technology Macau University of Science and Technology Avenida Wai Long Taipa Macau 999078 China;Nanophotonics Research Center Shenzhen Key Laboratory of Micro‐Scale Optical Information Technology Shenzhen University Shenzhen 518060 China;School of Science and Engineering The Chinese University of Hong Kong Shenzhen 518172 China;Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China;

关键词: heterojunctions;    selenium;    solar desalination;    tellurium;   

DOI  :  10.1002/advs.201900531

来源: DOAJ

【 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.

【 授权许可】

Unknown