n掺杂碳点/MnO2复合材料高效催化还原孔雀石绿和甲基紫

IF 1.7 4区 化学 Q4 CHEMISTRY, PHYSICAL
M. Shanti, S. Shylaja, Gaddameedi Hima Bindu, Mohammed Areef
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引用次数: 0

摘要

本文利用NCDs的还原性将KMnO4转化为MnO2,通过一锅法合成了n掺杂碳点/MnO2 (NCDs/MnO2)复合材料。表征技术,包括XPS, TEM, FTIR和XRD,证实了复合材料的成功形成。考察了NCDs/MnO2复合材料在NaBH4存在下还原孔雀石绿(MG)和甲基紫(MV)染料的催化性能。该复合材料表现出优异的催化活性,在14 min内还原了96.0%的MV,在12 min内还原了96.5%的MG。动力学研究显示了准一级反应动力学,MV的速率常数为0.2087±0.0113 min−1,MG的速率常数为0.1288±0.0083 min−1。此外,该复合材料表现出优异的可重复使用性,在多个循环中保持较高的催化效率。这些发现突出了NCDs/MnO2复合材料作为一种有前途的可持续催化剂处理染料污染废水的潜力,有助于环境修复工作。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
N-doped carbon dots/MnO2 composite for the efficient catalytic reduction of malachite green and methyl violet

Here in, N-doped carbon dots/MnO2 (NCDs/MnO2) composite was synthesized via a facile one-pot method, utilizing the reducing properties of NCDs to convert KMnO4 into MnO2. Characterization techniques, including XPS, TEM, FTIR, and XRD, confirmed the successful formation of the composite. The catalytic performance of the NCDs/MnO2 composite was evaluated for the reduction of malachite green (MG) and methyl violet (MV) dyes in the presence of NaBH4. The composite exhibited excellent catalytic activity with over 96.0% MV reduction in 14 min and 96.5% MG was reduced in 12 min. Kinetic studies revealed pseudo-first-order reaction kinetics, with rate constants of 0.2087 ± 0.0113 min−1 for MV and 0.1288 ± 0.0083 min−1 for MG. Moreover, the composite demonstrated excellent reusability, maintaining high catalytic efficiency over multiple cycles. These findings highlight the potential of the NCDs/MnO2 composite as a promising and sustainable catalyst for the treatment of dye-contaminated wastewater, contributing to environmental remediation efforts.

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来源期刊
CiteScore
3.30
自引率
5.60%
发文量
201
审稿时长
2.8 months
期刊介绍: Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.
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