Facile synthesis of nanosheet-assembled γ-Fe2O3 magnetic microspheres and enhanced Sb(III) removal
Facile synthesis of nanosheet-assembled γ-Fe2O3 magnetic microspheres and enhanced Sb(III) removal
复制标题
DOI：
10.1007/s11356-020-11727-7
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Zhenghua Wang
中科院分区：
文献类型：
--
作者：
Wenlin Zhao;& Bozhi Ren;Andrew Hursthouse;Zhenghua Wang
The development and utilization of magnetic nanoadsorption materials with large adsorption capacity and easy separation are the.research hotspot nowadays. In this study, nanosheet-assembled maghemite (γ-Fe2O3) magnetic microspheres were successfully.synthesized by an environmental friendly, quick, and simple method, for enhanced Sb(III) removal from aqueous solution..Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), vibrating sample.magnetometer (VSM), and Brunauer-Emmett-Teller (BET) were used to characterize the material. The results showed that the.product contained flower-like γ-Fe2O3 microspheres composed of petal-shaped nanosheets interspersed with each other. The.specific surface area and pore volume were 69.23 m2./g and 0.15 cm3./g, respectively. The material has a strong magnetic.response, which allows rapid solid-liquid separation under the action of an external magnetic field. The effects of different.dosages, solution pH, and contact time on the adsorption effect were studied by batch adsorption experiments, and the reusability.of the materials was evaluated. Both Freundlich isothermal adsorption model and pseudo-second-order kinetic model were able.to describe the uptake of Sb(III). The maximum adsorption capacity of the material was 47.48 mg/g under optimal conditions..The adsorption mechanism is mainly that Sb and lattice oxygen (OX.2−.) form Fe-O-Sb coordination bonds, which is incorporated.into the crystal structure of γ-Fe2O3 as inner-sphere surface complexes. The synthetic material has the advantage of simple.preparation process, good adsorption capacity, operation over a wide range of pH, and easy physical separation from treatment.systems with good potential for future application to treat polluted wastewater.
