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

IF 4.6 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
RSC Advances Pub Date : 2025-08-07 eCollection Date: 2025-08-01 DOI:10.1039/d5ra04120a
O M Lemine, M Bououdina, Turki Altoub, M Alshammari, Kadi Y Museery, Ali Z Alanzi, Latifa Latrous
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Abstract

This work reports the synthesis, characterization, and magnetic hyperthermia performance of pyrrole-functionalized magnetic biochar (PFMB) nanocomposites prepared via a hydrothermal method. The PFMB system comprises Fe3O4 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-1. 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-1, compared to 12.34-31.80 W g-1 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 m2 kg-1, aligning with the values reported for established polymer-coated MNPs. These results demonstrate the potential of PFMB nanocomposites as efficient and stable candidates for in vitro magnetic hyperthermia applications.

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用于磁热疗的吡咯功能化磁性生物炭(PFMB)的结构、磁性和加热性能。
本文报道了通过水热法制备的吡咯功能化磁性生物炭纳米复合材料的合成、表征和磁热疗性能。PFMB系统由Fe3O4纳米颗粒包埋在生物炭基质中,并包覆吡咯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和成功的表面功能化。磁性测量显示,裸MB的铁磁性行为转变为PFMB的超顺磁性行为,饱和磁化强度从58.8 emu g-1显著降低到20.8 emu g-1。交变磁场(AMF)下的磁热疗实验表明,PFMB的加热效率提高,样品吸收率(SAR)值在24.27 ~ 53.77 W g-1之间变化明显,而MB的吸收率为12.34 ~ 31.80 W g-1。结果表明,在较高频率(332 kHz和469 kHz)下,两种MNPs都能在较短的时间内达到42°C的治疗性热疗阈值。加热性能与频率和场幅都有很好的相关性。PFMB的内禀损耗功率(ILP)值达到0.70 nH m2 kg-1,与已建立的聚合物包被MNPs的值一致。这些结果证明了PFMB纳米复合材料作为体外磁热疗的高效和稳定的候选材料的潜力。
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
RSC Advances
RSC Advances chemical sciences-
CiteScore
7.50
自引率
2.60%
发文量
3116
审稿时长
1.6 months
期刊介绍: An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.
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