气凝胶
聚丙烯酰胺
朗缪尔吸附模型
吸附
催化作用
水溶液中的金属离子
罗丹明B
化学
螯合作用
反应速率常数
金属
化学工程
材料科学
无机化学
有机化学
动力学
纳米技术
高分子化学
光催化
工程类
物理
量子力学
作者
Chirag B. Godiya,Jinwoong Kim,Jongryeol Yang,Bum Jun Park
标识
DOI:10.1016/j.seppur.2023.124622
摘要
Developing advanced materials with excellent metal binding and mechanical properties is invariably challenging but of enormous significance in environmental remediation applications. Herein, aiming to achieve metal chelator-like coordination property with excellent mechanical robustness in a novel adsorbent, we developed a soy protein isolate (SPI)/polyacrylamide (PAM) aerogel via a facile synthetic strategy for efficient uptake of lead (Pb2+) and copper (Cu2+) from sewages. The grafting of PAM on the SPI network facilitated multiple surface-active sites, porous structure, and high strength, which eventually resulted in enhanced Pb2+ and Cu2+ uptake capacity. The maximum Pb2+ and Cu2+ uptake values of the SPI/PAM were ∼277.7 and ∼232.5 mg/g, respectively, which could be modelled using the Langmuir isotherm and pseudo-second-order rate equation. The in-depth binding mechanism interpretation disclosed that chelation and electrostatic attractions predominated the efficient metal ions uptake. Furthermore, cascaded reduction of complexed Cu2+ with SPI/PAM yielded Cu nanoparticles (NPs)-embedded aerogel which revealed ultra-rapid catalytic performance for the hydrogenation of organic dyes, i.e., Rhodamine B, methylene blue, and methyl orange (rate constant values: 0.54, 0.33, and 0.80 min−1, respectively). The green and facile synthetic approach, excellent cascaded metal ion uptake and catalytic dyes reduction properties (with high-performance reusability up to four cycles) show great promise to the SPI/PAM aerogel in appealing application concept for the remediation of complex wastewater.
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