Study on the nanocomposites of polyaniline and Zn doped Fe3O4 using for arsenic absorption in water

IF 1.7 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Advances in Natural Sciences: Nanoscience and Nanotechnology Pub Date : 2024-08-27 DOI:10.1088/2043-6262/ad6e5b

Tran Minh Thi, Nguyen Mau Lam, Do Khanh Tung, Nguyen Manh Nghia, Duong Quoc Van, Vu Quoc Manh, Nguyen Thi Bich Viet, Duong Khanh Linh, Nguyen Thuy Chinh, Thai Hoang, Ştefan Ţălu, Vu Quoc Trung

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Abstract

The polyaniline/Fe_2.9Zn_0.1O₄ (PANI/Fe_2.9Zn_0.1O₄) nanoparticles with different mass ratios were synthesized by both co-precipitation and in situ polymerization methods. The FT-IR spectra and DTA analyses showed the involvement of PANI in the nanocomposite samples. The grain size of samples measured by SEM ranges from 25 to 40 nm. The magnetization of samples at 300 K, H = 11000 Oe decreased from 65 to 43 emu g⁻¹ as PANI/Fe_2.9Zn_0.1O₄ mass ratio increased from 9% to 40%. At pH 7 and 300 K, the maximum arsenic (III) adsorption capacities of sample S₁ (mass ratio of 9%) q_max = 43.48 mg g⁻¹ was higher than that of others and Fe₃O₄. Additionally, the substitution of Fe²⁺ ions by Zn²⁺ ions and the presence of PANI in samples contributed to improving the magnetic and chemical stability of samples over time. Furthermore, these materials could be reused after desorption in a solution at pH 14.

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利用聚苯胺和掺杂锌的 Fe3O4 纳米复合材料在水中吸收砷的研究

采用共沉淀和原位聚合两种方法合成了不同质量比的聚苯胺/Fe2.9Zn0.1O4（PANI/Fe2.9Zn0.1O4）纳米粒子。傅立叶变换红外光谱和 DTA 分析表明，纳米复合材料样品中含有 PANI。用扫描电子显微镜测量的样品晶粒大小为 25 至 40 纳米。当 PANI/Fe2.9Zn0.1O4 的质量比从 9% 增加到 40% 时，样品在 300 K、H = 11000 Oe 条件下的磁化率从 65 降到 43 emu g-1。在 pH 7 和 300 K 条件下，样品 S1（质量比为 9%）的最大砷（III）吸附容量 qmax = 43.48 mg g-1 高于其他样品和 Fe3O4。此外，样品中 Zn2+ 离子取代 Fe2+ 离子以及 PANI 的存在有助于提高样品的磁性和化学稳定性。此外，这些材料在 pH 值为 14 的溶液中解吸后可重复使用。

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来源期刊

Advances in Natural Sciences: Nanoscience and Nanotechnology NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY

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