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富勒伦和树状/指纹碳量子点用于通过微波辅助合成吸附
Hebat-Allah S Tohamy1, Mohamed El-Sakhawy1, Samir Kamel1
1Cellulose and Paper Department, National Research Centre 33 El Bohouth Str., PO 12622 Dokki Giza Egypt hebasarhan89@yahoo.com elsakhawy@yahoo.com samirki@yahoo.com +201005888560.
RSC advances
|August 19, 2024
概括
两种类型的碳量子点 (CQD),树状/指纹 (TF-CQD) 和富勒烯类 (F),有效地从水中去除CrVI. TF-CQDs提供更快的吸附动力学,表明了高效净水应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术纳米技术
背景情况:
- 合成两个不同的碳量子点 (CQDs):树状/指纹 (TF-CQDs) 和富勒类 (F).
- 使用纤维素和碳甲基纤维素 (CMC) 作为酸/二甲基形式胺 (CA/DMF) 的前体.
- 研究了CQD形态对光学特性的影响.
研究的目的:
- 使用合成的TF-CQD和F.评估Cr(VI) 从水中去除的吸附行为和动力学.
- 通过两种CQD类型比较Cr(VI) 吸附的效率和机制.
- 在初始吸收期后评估吸附能力的稳定性.
主要方法:
- 使用来自纤维素和CMC的CA/DMF合成TF-CQDs和F.
- 使用光显微镜进行光学特性和传输电子显微镜 (TEM) 用于形态学的表征.
- ) 吸附实验以确定吸收能力和动力学.
- 动力建模 (一级,伪一级,伪二级) 以阐明吸附机制.
主要成果:
- 光显微镜显示TF-CQDs的蓝色辐射,F的绿色辐射.
- TEM证实了不同的形态:TF-CQD的复杂,F的球形.
- 两种CQD都表现出快速的Cr(VI) 吸收,TF-CQD更快地达到平衡 (120分钟对F的240分钟).
- 吸附能力在初始吸收后由于浸出而下降.
- TF-CQDs遵循一级运动模型 (物理吸附),而F适合伪一级和二级模型 (组合机制).
结论:
- TF-CQDs和F是有效的吸附剂,用于从水溶液中去除Cr (VI).
- CQDs的形态显著影响它们的吸附动力学和机制.
- 由于吸附动力更快,TF-CQD显示出更高的效率,这表明了先进水处理技术的潜力.
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