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用于磁热疗的吡咯功能化磁性生物炭（PFMB）的结构、磁性及加热能力

Structure, magnetism and heating ability of pyrrole-functionalized magnetic biochar (PFMB) for magnetic hyperthermia.

作者信息

Lemine O M, Bououdina M, Altoub Turki, Alshammari M, Museery Kadi Y, Alanzi Ali Z, Latrous Latifa

机构信息

Department of Physics, College of Sciences, Imam Mohammad Ibn Saud Islamic University (IMISU) Riyadh 11623 Saudi Arabia

Department of Mathematics and Sciences, College of Humanities and Sciences, Prince Sultan University 11586 Riyadh Saudi Arabia.

出版信息

RSC Adv. 2025 Aug 7;15(34):28145-28154. doi: 10.1039/d5ra04120a. eCollection 2025 Aug 1.

DOI:10.1039/d5ra04120a
PMID:40778103
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12330208/
Abstract

This work reports the synthesis, characterization, and magnetic hyperthermia performance of pyrrole-functionalized magnetic biochar (PFMB) nanocomposites prepared a hydrothermal method. The PFMB system comprises FeO nanoparticles embedded in a biochar matrix and coated with pyrrole to improve colloidal stability and heating efficiency. Structural and morphological analyses (XRD, FTIR, SEM/EDAX) confirmed the formation of a magnetite phase and successful surface functionalization. Magnetic measurements reveal a transition from ferrimagnetic behavior in bare MB to superparamagnetism in PFMB, with saturation magnetization reduced significantly from 58.8 to 20.8 emu g. Magnetic hyperthermia experiments under alternating magnetic fields (AMF) manifest enhanced heating efficiency for PFMB, with sample absorption rate (SAR) values varying considerably from 24.27 to 53.77 W g, compared to 12.34-31.80 W g for MB. The results indicate that at higher frequencies (332 kHz and 469 kHz), both MNPs reach the therapeutic hyperthermia threshold of 42 °C in a relatively short time. The heating performance correlates well with both frequency and field amplitude. Intrinsic loss power (ILP) values for PFMB reach 0.70 nH m kg, aligning with the values reported for established polymer-coated MNPs. These results demonstrate the potential of PFMB nanocomposites as efficient and stable candidates for magnetic hyperthermia applications.

摘要

本研究报告了通过水热法制备的吡咯功能化磁性生物炭（PFMB）纳米复合材料的合成、表征及磁热性能。PFMB体系由嵌入生物炭基质并包覆吡咯的FeO纳米颗粒组成，以提高胶体稳定性和加热效率。结构和形态分析（XRD、FTIR、SEM/EDAX）证实了磁铁矿相的形成及表面功能化的成功。磁性测量表明，从裸MB中的亚铁磁性行为转变为PFMB中的超顺磁性，饱和磁化强度从58.8 emu g显著降低至20.8 emu g。交变磁场（AMF）下的磁热实验表明PFMB的加热效率提高，样品吸收率（SAR）值在24.27至53.77 W g之间变化很大，而MB的SAR值为12.34 - 31.80 W g。结果表明，在较高频率（332 kHz和469 kHz）下，两种磁性纳米颗粒均能在相对较短的时间内达到42°C的治疗性热疗阈值。加热性能与频率和场强均有良好的相关性。PFMB的固有损耗功率（ILP）值达到0.70 nH m kg，与已报道的聚合物包覆磁性纳米颗粒的值一致。这些结果证明了PFMB纳米复合材料作为磁热疗应用中高效且稳定候选材料的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/df3a8ddb511b/d5ra04120a-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/7b6fdc683975/d5ra04120a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/859a42d77a13/d5ra04120a-f2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/e180b161fa19/d5ra04120a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/bd8de427341a/d5ra04120a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/3b9f86cfadaa/d5ra04120a-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/e743c8f22bc9/d5ra04120a-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/fdc4ff9f69b5/d5ra04120a-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/df3a8ddb511b/d5ra04120a-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/7b6fdc683975/d5ra04120a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/859a42d77a13/d5ra04120a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/29672e85f831/d5ra04120a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/e180b161fa19/d5ra04120a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/bd8de427341a/d5ra04120a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/3b9f86cfadaa/d5ra04120a-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/e743c8f22bc9/d5ra04120a-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/fdc4ff9f69b5/d5ra04120a-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8bfb/12330208/df3a8ddb511b/d5ra04120a-f9.jpg

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本文引用的文献

[1]
Electrochemical sensing of caffeic acid on natural biomass-pyrrole-functionalized magnetic biochar (PFMB) as promising SPE material.

Mikrochim Acta. 2025-3-18

[2]
Preparation and characterization of various PVPylated divalent metal-doped ferrite nanoparticles for magnetic hyperthermia.

RSC Adv. 2024-5-14

[3]
Synthesis and characterization of a novel magnetic chitosan-nickel ferrite nanocomposite for antibacterial and antioxidant properties.

Sci Rep. 2023-9-22

[4]
Influence of the modifiers in polyol method on magnetically induced hyperthermia and biocompatibility of ultrafine magnetite nanoparticles.

Sci Rep. 2023-5-15

[5]
Radio frequency plasma assisted surface modification of FeO nanoparticles using polyaniline/polypyrrole for bioimaging and magnetic hyperthermia applications.

J Mater Sci Mater Med. 2021-8-25

[6]
Polypyrrole-Coated Magnetite Vortex Nanoring for Hyperthermia-Boosted Photothermal/Magnetothermal Tumor Ablation Under Photoacoustic/Magnetic Resonance Guidance.

Front Bioeng Biotechnol. 2021-7-30

[7]
Magnetic Nanoparticles Coated with a Thermosensitive Polymer with Hyperthermia Properties.

Polymers (Basel). 2017-12-22

[8]
Superparamagnetic iron oxide nanocargoes for combined cancer thermotherapy and MRI applications.

Phys Chem Chem Phys. 2016-8-3

[9]
Caffeic acid-coated multifunctional magnetic nanoparticles for the treatment and bimodal imaging of tumours.

J Photochem Photobiol B. 2016-7

[10]
Efficient removal of crystal violet using Fe3O4-coated biochar: the role of the Fe3O4 nanoparticles and modeling study their adsorption behavior.

Sci Rep. 2015-7-29

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