双功能
零价铁
污染物
催化作用
木质素
吸附
纳米尺度
碳纤维
化学
零排放
化学工程
材料科学
无机化学
纳米技术
有机化学
废物管理
复合材料
工程类
复合数
作者
Wei-Dong Xiao,Ling‐Ping Xiao,Yi-Hui Lv,Wei Xing Zheng,Julio Sánchez,Shangru Zhai,Qingda An,Run‐Cang Sun
标识
DOI:10.1016/j.seppur.2022.121689
摘要
• Bifunctional material of lignin-derived carbon-supported with nZVI. • High-value utilization of industrial lignin to achieve “treating waste with waste”. • Excellent removal capacity of Cr(VI) and three organic dyes (MB, MO, and CR). • Degradation of organic dyes by a fenton-like reaction with self-produced H 2 O 2. • New strategy for development of multifunctional materials toward water remediation. Efficient removal of heavy metal ions and organic pollutants in wastewater is of great significance to healthy development of ecosystems. However, the facile preparation of novel functional materials for robust removal of both types of contaminants still remain a challenge. Herein, bifunctional composites derived from nanoscale zero-valent iron (nZVI) coated with lignin-derived carbon (LC) were fabricated via a carbothermal reduction strategy and denoted as Fe 0 @LC. This hybrid material exhibits superior performance with a maximum heavy metal removal amount of Cr(VI) as high as 575.4 mg/g from aqueous solutions. Notably, the elimination rate of Cr(VI) (100 mg/L) by Fe 0 @LC could reach up to 100% through adsorption and reduction. Furthermore, the obtained Fe 0 @LC occurs Fenton-like reactions without additional supply of H 2 O 2 toward effective degradation of organic pollutants, including 100%, 100% and 80% for methylene blue, methyl orange and congo red, respectively. The in-depth experimental and theoretical analyses reveal the synergistic effects between the catalytic Fe 0 center and the lignin-derived carbon boost the activity for catalytic degradation of organic dyes and Cr(VI) in the optimized conditions. This work not only provides critical insights into rational design, working mechanism, and application of bio-functional materials for wastewater treatment, but also achieves the goal of “treating waste with waste”.
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