title: Multifunctional flexible free-standing titanate nanobelt membranes as efficient sorbents for the removal of radioactive (90)Sr(2+) and (137)Cs(+) ions and oils.
abstract: For the increasing attention focused on saving endangered environments, there is a growing need for developing membrane materials able to perform complex functions such as removing radioactive pollutants and oil spills from water. A major challenge is the scalable fabrication of membranes with good mechanical and thermal stability, superior resistance to radiation, and excellent recyclability. In this study, we constructed a multifunctional flexible free-standing sodium titanate nanobelt (Na-TNB) membrane that was assembled as advanced radiation-tainted water treatment and oil uptake. We compared the adsorption behavior of (137)Cs(+) and (90)Sr(2+) on Na-TNB membranes under various environmental conditions. The maximum adsorption coefficient value (Kd) for Sr(2+) reaches 10(7) mL g(-1). The structural collapse of the exchange materials were confirmed by XRD, FTIR and XPS spectroscopy as well as Raman analysis. The adsorption mechanism of Na-TNB membrane is clarified by forming a stable solid with the radioactive cations permanently trapped inside. Besides, the engineered multilayer membrane is exceptionally capable in selectively and rapidly adsorbing oils up to 23 times the adsorbent weight when coated with a thin layer of hydrophobic molecules. This multifunctional membrane has exceptional potential as a suitable material for next generation water treatment and separation technologies.
authors: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.
authors: Tao
authors: T
authors: Wen
authors: Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, 230026, P.R. China.
authors: Zhiwei
authors: Z
authors: Zhao
authors: Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, 230026, P.R. China.
authors: Congcong
authors: C
authors: Shen
authors: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.
authors: Jiaxing
authors: J
authors: Li
authors: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.|Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, P.R. China.
authors: Xiaoli
authors: X
authors: Tan
authors: Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, 230026, P.R. China.
authors: Akif
authors: A
authors: Zeb
authors: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, P.R. China.|NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.|Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, P.R. China.
authors: Xiangke
authors: X
authors: Wang
authors: Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, 230026, P.R. China.
authors: An-Wu
authors: AW
authors: Xu
mesh_terms: D000327:Adsorption; D002588:Cesium Radioisotopes / Q000302:isolation & purification*; D017743:Equipment Reuse; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D007700:Kinetics; D008422:Materials Testing; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D010578:Petroleum / Q000032:analysis*; D059392:Petroleum Pollution; D018788:Radioactive Hazard Release; D012623:Seawater / Q000737:chemistry; D013326:Strontium Radioisotopes / Q000302:isolation & purification*; D014025:Titanium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014875:Water Pollutants, Radioactive / Q000302:isolation & purification*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
chemical_list: D002588:Cesium Radioisotopes; D008567:Membranes, Artificial; D010087:Oxides; D010578:Petroleum; D013326:Strontium Radioisotopes; D014874:Water Pollutants, Chemical; D014875:Water Pollutants, Radioactive; C471701:sodium titanate; D014025:Titanium