title: Novel 3D hierarchical cotton-candy-like CuO: surfactant-free solvothermal synthesis and application in As(III) removal.
abstract: Novel three-dimensional (3D) hierarchical cotton-candy-like CuO microspheres were synthesized by a facile precursor templated conversion method. The precursor was prepared by solvothermal method in ethylene glycol (EG) without the use of any surfactant. The possible formation mechanism of the precursor was proposed and it was found that the synthetic parameters for the precursor such as the ratio of Cu(2+) to urea, the reaction temperature, and the use of EG are crucial for the formation of the cotton-candy-like CuO precursor nanostructures. The cotton-candy-like CuO obtained by calcination were used as an adsorbent for removing As(III) in water. The adsorption isotherm, adsorption kinetics, the effects of competing anions and pH, and the adsorption mechanism were also investigated.
authors.affiliation: Research Center for Biomimetic Functional Materials and Sensing Devices, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, PR China.
authors.forename: Xin-Yao
authors.initials: XY
authors.lastname: Yu
authors.forename: Ren-Xia
authors.initials: RX
authors.lastname: Xu
authors.forename: Chao
authors.initials: C
authors.lastname: Gao
authors.forename: Tao
authors.initials: T
authors.lastname: Luo
authors.forename: Yong
authors.initials: Y
authors.lastname: Jia
authors.forename: Jin-Huai
authors.initials: JH
authors.lastname: Liu
authors.forename: Xing-Jiu
authors.initials: XJ
authors.lastname: Huang
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000295:instrumentation* / Q000379:methods; D007700:Kinetics; D008863:Microspheres; D049329:Nanostructures / Q000737:chemistry*; D010084:Oxidation-Reduction; D013501:Surface-Active Agents / Q000737:chemistry; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; D003300:Copper; D001151:Arsenic; C030973:cupric oxide