构建 MoS/Lignin 衍生碳纳米复合材料用于高效去除水环境中的 Cr(VI)。
Constructing MoS/Lignin-derived carbon nanocomposites for highly efficient removal of Cr(VI) from aqueous environment.
机构信息
State Key Laboratory of Pulp and Paper Engineering, School of Environment and Energy, South China University of Technology Guangzhou, Guangdong 510006, China.
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, Jiangxi 330013, China.
出版信息
J Hazard Mater. 2021 Apr 15;408:124847. doi: 10.1016/j.jhazmat.2020.124847. Epub 2020 Dec 14.
Effective removal of Cr(VI) pollution from aquatic environment is in pressing need because of the detrimental effect of Cr(VI) to human health. Herein, we report a facile two-step approach to synthesis MoS/Lignin-derived Carbon (MoS@LDC) nanocomposites for highly efficient elimination of Cr(VI) from aqueous solutions. The MoS@LDC exhibited outstanding removal efficient for Cr(VI) (198.70 mg/g at pH = 2.0, T = 298.15 K and C = 20.0 mg/L). 99.35% of Cr(VI) can be removed by the composites in 30 min. Thermodynamic and kinetic studies suggest the removal of Cr(VI) is through both adsorption and reduction. The performance of MoS@LDC can be further enhanced by hydrogen plasma treatments, which was attributed to the sulfur vacancies induced improvement in the reduction activity of MoS layer. The results of this work can guide the rational design of high-performance nanocomposite for efficient remediation of heavy metals in aquatic environment.
由于 Cr(VI) 对人类健康的有害影响，有效去除水环境污染中的 Cr(VI)迫在眉睫。在此，我们报告了一种简便的两步法合成 MoS/Lignin 衍生碳 (MoS@LDC) 纳米复合材料，用于从水溶液中高效去除 Cr(VI)。MoS@LDC 对 Cr(VI) 表现出优异的去除效率（在 pH=2.0、T=298.15 K 和 C=20.0 mg/L 时为 198.70 mg/g）。在 30 分钟内，复合材料可去除 99.35%的 Cr(VI)。热力学和动力学研究表明，Cr(VI)的去除是通过吸附和还原两种方式进行的。氢气等离子体处理可以进一步提高 MoS@LDC 的性能，这归因于硫空位诱导 MoS 层还原活性的提高。这项工作的结果可以指导合理设计高性能纳米复合材料，以有效修复水环境污染中的重金属。
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