Jiao Fan-Zhen, Wu Jing, Zhang Tingting, Pan Rui-Jie, Wang Zhi-Hao, Yu Zhong-Zhen, Qu Jin
State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing 100029, China.
ACS Appl Mater Interfaces. 2023 Aug 30;15(34):41007-41018. doi: 10.1021/acsami.3c09346. Epub 2023 Aug 16.
Although solar steam generation is promising in generating clean water by desalinating seawater, it is powerless to totally degrade organic contaminants in the seawater. Herein, solar steam generation and catalytic degradation are integrated to generate clean water by simultaneous solar-driven desalination and catalytic degradation of wastewater containing both salt ions and organic contaminants. Stepwise decoration of three-dimensional nickel foam with polypyrrole, reduced graphene oxide (RGO), and cobalt phosphate is realized to obtain polypyrrole/RGO/cobalt phosphate/nickel foam (PGCN) hybrids for solar-driven desalination and catalytic degradation of wastewater containing antibiotics and salt ions. The oxygen-containing groups of the RGO integrated with the porous nickel foam make the porous PGCN hybrid hydrophilic and ensure the upward transport of water to the evaporation surface, and the oxygen vacancies of the cobalt phosphate allow the PGCN to generate abundant highly active singlet oxygen that could still exhibit excellent catalytic degradation performances in the high salinity and highly alkaline environment of seawater. In addition to the high solar light absorbance and satisfactory solar-thermal conversion efficiency of polypyrrole and RGO, the thermally conductive nickel foam skeleton can effectively transfer the heat generated by the solar-thermal energy conversion to the adjacent cobalt phosphate catalyst and nearby wastewater, achieving a solar-thermal-promoted catalytic degradation of organic contaminants. Therefore, a high pure water evaporation rate of 2.08 kg m h under 1 sun irradiation and 100% catalytic degradation of Norfloxacin and dyes are achieved. The PGCN hybrid is highly efficient in purifying seawater containing 10 ppm Norfloxacin and simultaneously achieves a high purification efficiency of 100 kg m h.
尽管太阳能蒸汽发生技术在通过海水淡化生产清洁水方面具有广阔前景，但它对于完全降解海水中的有机污染物却无能为力。在此，将太阳能蒸汽发生与催化降解相结合，通过同时进行太阳能驱动的海水淡化和对含有盐离子和有机污染物的废水进行催化降解来生产清洁水。实现了用聚吡咯、还原氧化石墨烯（RGO）和磷酸钴对三维泡沫镍进行逐步修饰，以获得用于太阳能驱动的含有抗生素和盐离子的废水淡化及催化降解的聚吡咯/RGO/磷酸钴/泡沫镍（PGCN）复合材料。与多孔泡沫镍结合的RGO的含氧基团使多孔PGCN复合材料具有亲水性，并确保水向上传输至蒸发表面，而磷酸钴的氧空位使PGCN产生大量高活性单线态氧，其在海水的高盐度和高碱性环境中仍能表现出优异的催化降解性能。除了聚吡咯和RGO具有高太阳光吸收率和令人满意的太阳能-热转换效率外，具有热传导性的泡沫镍骨架能够有效地将太阳能-热转换产生的热量传递给相邻的磷酸钴催化剂和附近的废水，实现对有机污染物的太阳能-热促进催化降解。因此，在1个太阳辐照下实现了2.08 kg m⁻² h⁻¹的高纯水蒸发速率以及对诺氟沙星和染料的100%催化降解。PGCN复合材料在净化含有10 ppm诺氟沙星的海水方面效率很高，同时实现了100 kg m⁻² h⁻¹的高净化效率。
