论文成果
Synergistic interfacial solar evaporation and organic pollutant degradation
发布时间：2023-10-22 点击次数：
论文类型：期刊论文
论文编号：100561
第一作者：Bingyu Chen
通讯作者：Jie Liu,Ran Niu,Jiang Gong
合写作者：Lijie Liu,Yuhang Song,Huajian Liu,Zhi Gong,Yan She
发表刊物：Materials Today Sustainability
收录刊物：SCI、EI
学科门类：工学
一级学科：材料科学与工程
文献类型：J
卷号：24
关键字：Interfacial solar-driven steam generation; Solar evaporator; Waste plastics; Metal-organic framework; Advanced oxidation processes
发表时间：2023-09-21
影响因子：7.8
摘要：The development of hybrid photothermal materials coupling interfacial solar-driven water evaporation with advanced oxidation process has recently aroused extensive attention to simultaneously realize freshwater production and wastewater purification. However, designing advanced hybrid photothermal materials with high specific surface areas and robust active sites remains challenging to meet the distinct requirements of photothermal conversion and photocatalysis. Herein, we report the waste-to-metal-organic framework (MOF) strategy for converting waste poly(ethylene terephthalate) [PET] into Cr-MOF hexahedron with abundant active sites and large specific surface area (896.1 m2/g), and subsequently fabricate multifunctional chromium-based metal-organic frameworks (Cr-MOF)/carbon nanotube (CNT) composite solar evaporators in a cost-effective, scalable manner towards simultaneous interfacial solar-driven steam generation and stubborn contaminant removal. First, the composite evaporator presents high light absorption (98%), high photothermal conversion efficiency, super-hydrophilicity, low thermal coefficient (0.087 W/(m/K)) and low vaporization enthalpy. Accordingly, the composite evaporator not only holds a high evaporation rate (2.46 kg/(m2/h)), superior to most of advanced solar evaporators, but also owns good flexibility and long-term stability. Subsequently, according to density functional theory (DFT) calculation and COMSOL results, chromium sites of Cr-MOF and local solar heat contribute to the peroxymonosulfate (PMS) activation to produce various reactive species. Thereupon, the composite evaporator exhibits good tetracycline (TC) degradation activity. Finally, in the practical freshwater production and photocatalytic degradation, the freshwater production amount is 7.3 kg/m2 per day, along with the tetracycline degradation efficiency of 92.4%. This work provides an ingenious strategy to massively synthesize hybrid evaporators and concurrently advances freshwater production and pollutant elimination.
发布期刊链接：https://www.sciencedirect.com/science/article/pii/S2589234723002488