In this study, cellulose nanofibers are used as a template to synthesise magnetic nanoparticles with a uniform size distribution. Magnetic nanoparticles are grafted on the surface of nanofibers via in situ hydrolysis of metal precursors at room temperature. Effects of different concentrations of nanofibers on the morphology, the crystallite size of magnetic nanoparticles, and the thermal and magnetic properties of the membrane produced from the cellulose nanofibers decorated with magnetic nanoparticles are examined. The sizes of magnetic nanoparticles produced in this study are below 20 nm, and the crystallite size of the nanoparticles is in the range of 96-130 Å. The flexible magnetic membranes containing a high concentration of magnetic nanoparticles (83-60 wt%) showed superparamagnetic behaviour with very high magnetic properties (67.4-38.5 emu g-1). The magnetic membrane was then used as an environmentally friendly, low-cost catalyst in a sulphate radical-based advanced oxidation process. The membranes successfully activated peroxymonosulphate (PMS) to remove Rhodamine B (RhB), a common hydrophilic organic dye applied in industry. 94.9 % of the Rhodamine B was degraded in 300 min at room temperature, indicating that the magnetic nanocellulose membrane is highly effective for catalyzing PMS to remove RhB.

中文翻译：

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磁性纳米纤维素：一种用于从水中去除染料的潜在材料。

在这项研究中，纤维素纳米纤维被用作模板来合成具有均匀尺寸分布的磁性纳米颗粒。磁性纳米颗粒通过室温下金属前体的原位水解接枝到纳米纤维的表面。检查了不同浓度的纳米纤维对磁性纳米颗粒的形态，微晶尺寸以及由装饰有磁性纳米颗粒的纤维素纳米纤维制成的膜的热和磁性的影响。在这项研究中产生的磁性纳米粒子的尺寸在20 nm以下，纳米粒子的微晶尺寸在96-130Å的范围内。包含高浓度磁性纳米颗粒（83-60 wt％）的柔性磁性膜表现出超顺磁性，并具有非常高的磁性（67.4-38）。5 g g-1）。然后在基于硫酸根的高级氧化工艺中，将磁性膜用作环保，低成本的催化剂。膜成功激活了过氧单硫酸盐（PMS）以去除若丹明B（RhB），一种工业上常用的亲水性有机染料。在室温下，在300分钟内降解了94.9％的若丹明B，表明磁性纳米纤维素膜对于催化PMS去除RhB非常有效。