期刊
ACS APPLIED NANO MATERIALS
卷 1, 期 1, 页码 284-292出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.7b00149
关键词
layer-by-layer assembly; exfoliated nanosheets; biocatalytic; hybrid; film; laccase
资金
- National Natural Science Foundation of China [U1507115]
- Natural Science of Jiangsu Province [BK20160500, BK20161362]
- 333 High-Level Personnel Training Project of Jiangsu Province [BRA2016142]
- China Postdoctoral Science Foundation [2016M600373, 1701067C, 1601016A]
The development of biobased hybrid materials that can efficiently remove environmentally contaminants has broad practical applications for areas. In this work, a novel biomaterial inorganic hybrid film was fabricated with Cu Al layered double hydroxide (LDH) nanosheets as host and laccase as guest by using exfoliation/self-assembly monolayer technology. It included two processes: first, a nitric acid intercalation Cu Al NO3- LDHs was prepared with Cu Al CO32- LDHs through the ion-exchange method, and then Cu Al NO3- LDHs was exfoliated into a single-layer nanodispersion system with abundant Cu2+ ions on the surface of the positively charged layered double hydroxides to assemble the (LDHs/laccase), hybrid multilayer film. The resulting (LDHs/laccase) hybrid film was characterized by X-ray diffraction, scanning electron microscope, high-resolution transmission electron microscopy, scanning probe microscope, and UV visible absorption spectroscopy, which all supported the formation of the layer-by-layer sandwich structures. The performance of the as-prepared film was evaluated for efficient biocatalytic removal of congo red from aqueous solutions. The loaded amounts of laccase of (LDHs/laccase), were estimated to be 0.0626 mg/cm(2) (n = 10), 0.1731 mg/cm(2) (n = 30) and 0.2809 mg/cm(2) (n = 50) by Bradford protein assay method. Taking advantage of the combined benefits of LDH and protein, the as-prepared (LDHs/laccase) hybrid film exhibited high uptake removal performance and high storage stability in contrast with free laccase. The superior removal performance of (LDHs/ laccase) hybrid film supports a potential strategy for decontamination of congo red dye from wastewater, and it may provide new insights for efficient removal of dye in environmental pollution cleanup.
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