Efficient Removal of Toxic Dyes via Simultaneous Adsorption and Solar Light Driven Photodegradation Using Recyclable Functionalized Amylopectin–TiO2–Au Nanocomposite

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• 作者：Amit Kumar Sarkar ; Arka Saha ; Abhrojyoti Tarafder ; Asit Baran Panda ; Sagar Pal
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：March 7, 2016
• 年：2016
• 卷：4
• 期：3
• 页码：1679-1688
• 全文大小：553K
• ISSN：2168-0485

文摘

Herein, functionalized amylopectin and in situ generated TiO₂ and Au nanoparticles (NPs)-based nanocomposite with excellent toxic organic dye removal capacity, via synergistic effects of adsorption and photocatalytic degradation, along with enhanced antimicrobial activity, is reported. The TiO₂ and TiO₂–AuNPs incorporated nanocomposites (g-AP-pAA/TiO₂, g-AP-pAA/TiO₂–Au) have been synthesized by the addition of ethanolic solution of titanium isopropoxide (Ti-ⁱPr) followed by HAuCl₄ to the gelling matrix of functionalized amylopectin. Characterization results confirm the formation of uniform distribution of anatase TiO₂ (5–8 nm) and Au (7–15 nm) NPs in the polymer matrix. The synthesized g-AP-pAA/TiO₂–Au nanocomposite demonstrates excellent potential to remove dyes from concentrated aqueous dye solution via simultaneous adsorption followed by photocatalytic degradation under sunlight through plasmonic photocatalysis. Synthesized g-AP-pAA/TiO₂–Au is capable of removing one specific dye from a mixture of dyes. In addition, the photo induced bacterial (Escherichia coli) growth inhibition characteristics of the composite indicate the development of a novel new generation sustainable and cost-effective polymeric nanocomposite.