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.
State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
J Colloid Interface Sci. 2023 May;637:477-488. doi: 10.1016/j.jcis.2023.01.095. Epub 2023 Jan 24.
Although most solar steam generation devices are effective in desalinating seawater and purifying wastewaters with heavy metal ions, they are ineffective in degrading organic pollutants from wastewaters. Herein, we design novel solar-driven water purification devices by decoration of three-dimensional pinecones with MoS nanoflowers via a one-step hydrothermal synthesis for generating clean water. The vertically arrayed channels in the central rachis and the unique helically arranged scales of the hydrothermal pinecone can not only transfer bulk water upward to the evaporation surface, but also absorb more solar light from different incident angles for solar-thermal evaporation and photodegradation of wastewaters under omnidirectional irradiations. The decorated MoS nanoflowers can not only enhance the solar-thermal energy conversion efficiency, but also decompose organic pollutants in the bulk water by their photocatalytic degradation effects. The resultant hydrothermal pinecone with in situ decorated MoS (HPM) evaporator exhibits a high evaporation rate of 1.85 kg m h under 1-sun irradiation with a high energy efficiency of 96 %. During the solar-driven water purification processes, the powdery HPM can also photodegrade organic pollutants of methylene blue and rhodamine B with high removal efficiencies of 96 % and 95 %, respectively. For practical demonstration, by floating in the methylene blue solution under 1-sun irradiation, the bulky HPM can generate clean water by simultaneous solar-thermal evaporation and photocatalytic degradation. The integration of solar steam generation and photocatalytic degradation mechanisms makes the HPM evaporator highly promising for practical high-yield purification of wastewaters.
虽然大多数太阳能蒸汽发生装置在淡化海水和净化重金属离子废水方面效果显著，但它们在降解废水中的有机污染物方面效果不佳。在此，我们通过一步水热合成在三维松果上装饰 MoS 纳米花，设计了新型的太阳能驱动水净化装置，用于产生清洁水。中心轴上垂直排列的通道和水热松果独特的螺旋状排列的鳞片不仅可以将大量的水向上输送到蒸发表面，还可以从不同的入射角度吸收更多的太阳光线，用于太阳能热蒸发和全方位辐照下的废水光降解。装饰的 MoS 纳米花不仅可以提高太阳能热能转换效率，还可以通过光催化降解作用分解体相中的有机污染物。所得的原位装饰 MoS 的水热松果（HPM）蒸发器在 1 个太阳照射下表现出 1.85 kg m h 的高蒸发率，能量效率高达 96%。在太阳能驱动的水净化过程中，粉末状的 HPM 还可以光降解亚甲基蓝和罗丹明 B 等有机污染物，去除率分别高达 96%和 95%。为了实际演示，通过在 1 个太阳照射下漂浮在亚甲基蓝溶液上，体积庞大的 HPM 可以通过太阳能热蒸发和光催化降解同时产生清洁水。太阳能蒸汽发生和光催化降解机制的集成使 HPM 蒸发器非常有希望用于实际的高效废水净化。
