Nitrogen-Doped Biochar Aerogel as Efficient Peroxymonosulfate Activator for Organic Pollutant Removal.

IF 4.4 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Nanomaterials Pub Date : 2025-06-04 DOI:10.3390/nano15110865

Lingshuai Kong, Mingshuo Zhu, Jinhua Zhan

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引用次数: 0

Abstract

Rapid industrialization has escalated environmental pollution caused by organic compounds, posing critical challenges for wastewater treatment. Advanced oxidation processes based on peroxymonosulfate (PMS) suffer from metal leaching and catalyst recycling challenges. To address these limitations, this study developed a nitrogen-doped biochar aerogel (NBA) derived from poplar wood powder as an eco-friendly and easily recoverable PMS activator. The NBA catalyst, optimized by tuning the calcination temperature to achieve a specific surface area of 297.5 m² g^-1, achieved 97% bisphenol A (BPA) removal within 60 min with a catalyst dosage of 0.3 g/L and 1.0 mM PMS under mild conditions. The material exhibited broad pH adaptability (pH 3.5-9), recyclability (>94% efficiency after thermal treatment), and versatility in degrading seven pollutants (BPA, phenol, 4-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol, rhodamine 6G, and levofloxacin) through synergistic radical (•OH, SO₄^•-, O₂^•-) and non-radical (¹O₂) pathways. X-ray photoelectron spectroscopy (XPS) analyses revealed that nitrogen doping enhanced PMS activation by optimizing electronic structures. This study highlights the potential of waste biomass-derived carbon aerogels as eco-friendly, efficient, and reusable catalysts for advanced oxidation processes in wastewater treatment.

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掺氮生物炭气凝胶作为高效过氧单硫酸盐活化剂去除有机污染物。

快速工业化加剧了有机化合物对环境的污染，对废水处理提出了严峻的挑战。基于过氧单硫酸盐（PMS）的高级氧化工艺面临金属浸出和催化剂回收的挑战。为了解决这些限制，本研究开发了一种从杨木粉中提取的氮掺杂生物炭气凝胶（NBA），作为一种环保且易于回收的PMS活化剂。通过调整煅烧温度，优化了NBA催化剂的比表面积为297.5 m2 g-1，在温和条件下，催化剂用量为0.3 g/L， PMS为1.0 mM， 60 min内可去除97%的双酚a （BPA）。该材料具有广泛的pH适应性（pH值为3.5-9），可回收性（热处理后效率为>94%），并可通过协同自由基（•OH, SO4•-,O2•-）和非自由基（1O2）途径降解7种污染物（BPA，苯酚，4-氯苯酚，2,4-二氯苯酚，2,4,6-三氯苯酚，罗丹明6G和左氧氟沙星）。x射线光电子能谱（XPS）分析表明，氮掺杂通过优化电子结构增强了PMS的活化。这项研究强调了废弃生物质衍生的碳气凝胶作为环保、高效和可重复使用的催化剂在废水处理中的高级氧化过程中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanomaterials NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.50

自引率

9.40%

发文量

3841

审稿时长

14.22 days

期刊介绍： Nanomaterials (ISSN 2076-4991) is an international and interdisciplinary scholarly open access journal. It publishes reviews, regular research papers, communications, and short notes that are relevant to any field of study that involves nanomaterials, with respect to their science and application. Thus, theoretical and experimental articles will be accepted, along with articles that deal with the synthesis and use of nanomaterials. Articles that synthesize information from multiple fields, and which place discoveries within a broader context, will be preferred. There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental or methodical details, or both, must be provided for research articles. Computed data or files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Nanomaterials is dedicated to a high scientific standard. All manuscripts undergo a rigorous reviewing process and decisions are based on the recommendations of independent reviewers.