Massive oily wastewater discharged from industrial production and human daily life have been an urgent environmental and ecological challenge.Superhydrophobic materials have attracted tremendous attention due to their...Massive oily wastewater discharged from industrial production and human daily life have been an urgent environmental and ecological challenge.Superhydrophobic materials have attracted tremendous attention due to their unique properties and potential applications in the treatment of wastewater.In this study,a novel superhydrophobic/superoleophilic composite melamine sponge modified with dual silanized SiO_(2) microspheres was fabricated simply by a two-step sol-gel method using vinyltriethoxysilane and hexadecyltrimethoxysilane as functional agent,which exhibited a water contact angle of 153.2°and a water sliding contact angle of 4.8°.Furthermore,the composite sponge showed the excellent oil adsorption performance and the compressive elasticity reaching up to 130 g·g^(-1) of dichloromethane and 33.1 kPa of compressive stress.It was worth noting that the composite sponge presented the excellent separation efficiency(up to 99.5%)in the processes of continuous oil/water separation.The robust superhydrophobic composite melamine sponge provided the possibility with the practical application for oil-water separation.展开更多
Herein,we report a biphase stratification strategy that enables the encapsulation of magnetic mesoporous TiO_(2) inside an ordered mesoporous C/SiO_(2) framework.The obtained composites exhibit high surface areas(up t...Herein,we report a biphase stratification strategy that enables the encapsulation of magnetic mesoporous TiO_(2) inside an ordered mesoporous C/SiO_(2) framework.The obtained composites exhibit high surface areas(up to 600 m^(2) g^(-1)),large perpendicular pore sizes(up to 9 nm)and a strong magnetic response(~10.0 emu g^(-1)),presenting significantly enhanced degradation activities toward pentachlorophenol(PCP)and bisphenol-A(BPA)under acoustic cavitation energy.The remarkable performance is ascribed to the synergistic effect from the unique structural modulation:1)The large ordered mesopores favors the mass transfer,2)The mesoporous C/SiO_(2) frameworks promote the adsorption of organic pollutants and enrich them close to the TiO_(2) surface and 3)The special spatial arrangement of different components facilitates the generation of cavitation bubbles,leading to the increase in the overall hydroxyl-radical-production rate.Moreover,owing to the effective confinement,the as-prepared materials possess an excellent stability and durability.More importantly,the catalysts can easily be recovered by a magnet and show an excellent reusability.It is believed that these results could provide an important insight for the development of an efficient,stable and facile recoverable catalyst for the acoustic chemical process.展开更多
基金This work was supported by the National Natural Science Foundation of China(No.21676127)Natural Science Foundation of Jiangsu Province(BK20170532)+4 种基金China Postdoctoral Science Foundation(2017M620194)Jiangsu Planned Projects for Postdoctoral Research Funds(1701023A)Natural Science Foundation Jiangsu Higher Education Institutions(17KJB430011)Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX19_1592)Zhenjiang Natural Science Foundation of China(Grant Nos.SH2017046,SH2017055).
文摘Massive oily wastewater discharged from industrial production and human daily life have been an urgent environmental and ecological challenge.Superhydrophobic materials have attracted tremendous attention due to their unique properties and potential applications in the treatment of wastewater.In this study,a novel superhydrophobic/superoleophilic composite melamine sponge modified with dual silanized SiO_(2) microspheres was fabricated simply by a two-step sol-gel method using vinyltriethoxysilane and hexadecyltrimethoxysilane as functional agent,which exhibited a water contact angle of 153.2°and a water sliding contact angle of 4.8°.Furthermore,the composite sponge showed the excellent oil adsorption performance and the compressive elasticity reaching up to 130 g·g^(-1) of dichloromethane and 33.1 kPa of compressive stress.It was worth noting that the composite sponge presented the excellent separation efficiency(up to 99.5%)in the processes of continuous oil/water separation.The robust superhydrophobic composite melamine sponge provided the possibility with the practical application for oil-water separation.
基金supported by the NSF of China(Grant nos.51822202 and 51772050)Shanghai Rising-Star Program(18QA1400100)+4 种基金Youth Top-notch Talent Support Program of ShanghaiShanghai Scientific and Technological Innovation Project(19JC1410400)the Shanghai Committee of Science and Technology,China(19520713200)DHU Distinguished Young Professor ProgramFundamental Research Funds for the Central Universities.
文摘Herein,we report a biphase stratification strategy that enables the encapsulation of magnetic mesoporous TiO_(2) inside an ordered mesoporous C/SiO_(2) framework.The obtained composites exhibit high surface areas(up to 600 m^(2) g^(-1)),large perpendicular pore sizes(up to 9 nm)and a strong magnetic response(~10.0 emu g^(-1)),presenting significantly enhanced degradation activities toward pentachlorophenol(PCP)and bisphenol-A(BPA)under acoustic cavitation energy.The remarkable performance is ascribed to the synergistic effect from the unique structural modulation:1)The large ordered mesopores favors the mass transfer,2)The mesoporous C/SiO_(2) frameworks promote the adsorption of organic pollutants and enrich them close to the TiO_(2) surface and 3)The special spatial arrangement of different components facilitates the generation of cavitation bubbles,leading to the increase in the overall hydroxyl-radical-production rate.Moreover,owing to the effective confinement,the as-prepared materials possess an excellent stability and durability.More importantly,the catalysts can easily be recovered by a magnet and show an excellent reusability.It is believed that these results could provide an important insight for the development of an efficient,stable and facile recoverable catalyst for the acoustic chemical process.
