title: Controlled preparation and reactive silver-ion sorption of electrically conductive poly(N-butylaniline)-lignosulfonate composite nanospheres.
abstract: Electroconductive poly(N-butylaniline)-lignosulfonate (PBA-LS) composite nanospheres were prepared in a facile way by in situ, unstirred polymerization of N-butylaniline with lignosulfonate (LS) as a dispersant and dopant. The LS content was used to optimize the size, structure, electroconductivity, solubility, and silver ion adsorptive capacity of the PBA-LS nanospheres. Uniform PBA-LS10 nanospheres with a minimal mean diameter of 375 nm and high stability were obtained when the LS content was 10 wt %. The PBA-LS10 nanospheres possess an increased electroconductivity of 0.109 S cm(-1) compared with that of poly(N-butylaniline) (0.0751 S cm(-1)). Furthermore, the PBA-LS10 nanospheres have a maximal silver-ion sorption capacity of 815.0 mg  g(-1) at an initial silver ion concentration of 50 mmol  L(-1) (25 °C for 48 h), an enhancement of 70.4% compared with PBA. Moreover, a sorption mechanism of silver ions on the PBA-LS10 nanospheres is proposed. TEM and wide-angle X-ray diffraction results showed that silver nanoparticles with a diameter size range of 6.8-55 nm was achieved after sorption, indicating that the PBA-LS10 nanospheres had high reductibility for silver ions.
authors.affiliation: College of Materials Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China. qiufenglv@163.comqiufenglvfzu@gmail.com
authors.forename: Qiu-Feng
authors.initials: QF
authors.lastname: Lü
authors.forename: Jia-Yin
authors.initials: JY
authors.lastname: Zhang
authors.forename: Zhi-Wei
authors.initials: ZW
authors.lastname: He
mesh_terms: D000327:Adsorption; D007477:Ions / Q000737:chemistry*; D008031:Lignin / Q000031:analogs & derivatives* / Q000737:chemistry; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry*; D054118:Nanospheres / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013055:Spectrophotometry, Infrared
chemical_list: D007477:Ions; C581909:poly(N-butylaniline)-lignosulfonate; D012834:Silver; D008031:Lignin