Transition metal phosphates are used as inorganic pigments, however these materials have a weak point for acid or base resistance. Because lanthanum phosphate is insoluble in acidic or basic solution, the addition of ...Transition metal phosphates are used as inorganic pigments, however these materials have a weak point for acid or base resistance. Because lanthanum phosphate is insoluble in acidic or basic solution, the addition of lanthanum was tried to improve the acid or base resistance of copper phosphate pigment. Various cooper – lanthanum phosphates were synthesized in wet (H3PO4, Cu(NO3)2, La(NO3)3) or dry (H3PO4, CuCO3●Cu(OH)2●H2O, La2O3) processes. The additional effects of lanthanum were studied on the chemical composition, particle shape and size distribution, specific surface area, color, acid and base resistance of the precipitates and their thermal products.展开更多
Membrane pollution caused by separating oily wastewater is a big challenge for membrane separation technology.Recently,plant-/mussel-inspired interface chemistry has received more and more attention.Herein,a high anti...Membrane pollution caused by separating oily wastewater is a big challenge for membrane separation technology.Recently,plant-/mussel-inspired interface chemistry has received more and more attention.Herein,a high antifouling poly(vinylidene fluoride)(PVDF)membrane,coated with tea polyphenols(TP,extracted from green tea)and 3-amino-propyl-triethoxysilane(APTES),was developed to purify oil-inwater emulsions.ATR-FTIR,XPS and SEM were used to demonstrate the evolution of surface biomimetic hybrid coatings.The performances of the developed membranes were investigated by pure water permeability and oil rejection for various surfactant-stabilized oil-in-water emulsions.The experimental results revealed that the membrane deposited with a mass ratio of 0.1/0.2 exhibited ultrahigh pure water permeability(14570 L·m^(-2)·h^(-1)·bar^(-1),1 bar=0.1 MPa)and isooctane-in-water emulsion permeability(5391 L·m^(-2)·h^(-1)·bar^(-1))with high separation efficiency(>98.9%).Even treated in harsh environment(acidic,alkaline and saline)for seven days,the membrane still maintained considerable underwater oleophobic property(148°–153°).The fabricated plant-inspired biomimetic hybrid membranes with excellent performances light a broad application prospect in the field of oily wastewater treatment.展开更多
文摘Transition metal phosphates are used as inorganic pigments, however these materials have a weak point for acid or base resistance. Because lanthanum phosphate is insoluble in acidic or basic solution, the addition of lanthanum was tried to improve the acid or base resistance of copper phosphate pigment. Various cooper – lanthanum phosphates were synthesized in wet (H3PO4, Cu(NO3)2, La(NO3)3) or dry (H3PO4, CuCO3●Cu(OH)2●H2O, La2O3) processes. The additional effects of lanthanum were studied on the chemical composition, particle shape and size distribution, specific surface area, color, acid and base resistance of the precipitates and their thermal products.
基金supported by Tianjin Synthetic Biotechnology Innovation Capacity Improvement Project(TSBICIP-KJGG-003)Qinglan Plan of Jiangsu Education Department and the National Key Research and Development Program of China(2017YFD0400402).
文摘Membrane pollution caused by separating oily wastewater is a big challenge for membrane separation technology.Recently,plant-/mussel-inspired interface chemistry has received more and more attention.Herein,a high antifouling poly(vinylidene fluoride)(PVDF)membrane,coated with tea polyphenols(TP,extracted from green tea)and 3-amino-propyl-triethoxysilane(APTES),was developed to purify oil-inwater emulsions.ATR-FTIR,XPS and SEM were used to demonstrate the evolution of surface biomimetic hybrid coatings.The performances of the developed membranes were investigated by pure water permeability and oil rejection for various surfactant-stabilized oil-in-water emulsions.The experimental results revealed that the membrane deposited with a mass ratio of 0.1/0.2 exhibited ultrahigh pure water permeability(14570 L·m^(-2)·h^(-1)·bar^(-1),1 bar=0.1 MPa)and isooctane-in-water emulsion permeability(5391 L·m^(-2)·h^(-1)·bar^(-1))with high separation efficiency(>98.9%).Even treated in harsh environment(acidic,alkaline and saline)for seven days,the membrane still maintained considerable underwater oleophobic property(148°–153°).The fabricated plant-inspired biomimetic hybrid membranes with excellent performances light a broad application prospect in the field of oily wastewater treatment.
