In situ synthesis and immobilization of CuO nanoparticles in alginate-poly(amido amine) nanogels for photocatalytic applications

IF 2.2 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters: X Pub Date : 2022-06-01 DOI:10.1016/j.mlblux.2022.100148

A. Córdoba , B. Durán , S. Bonardd , D. Diaz Diaz , A. Leiva , C. Saldías

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引用次数: 1

Abstract

Herein, we report a feasible approach for preparation of crosslinked alginate (Alg) and poly(amido amine) (PAMAM) nanogels (Alg-PAMAM NGs), using a water-in-oil-in-water (w/o/w) double emulsion route, via strong electrostatic interactions between anionic groups coming from alginate and previously incorporated Cu²⁺ ions. CuO nanoparticles (NPs) with average diameter about 65 nm were in situ obtained into Alg/PAMAM nanogels by treatment of embedded Cu²⁺ ions in NGs with NaBH₄ at 25 °C under air atmosphere. The prepared Alg-PAMAM and Alg-PAMAM-CuO NGs were characterized using FT-IR and UV–visible spectroscopy, as well as scanning transmission electron microscopy (STEM). The presence of PAMAM dendrimers helped both to obtain structurally compact nanogels and an adequate stabilization of CuO NPs. Finally, the photocatalytic performance of the Alg-PAMAM-CuO NGs was tested via the decomposition of methyl orange in aqueous solution, under visible light irradiation.

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原位合成CuO纳米颗粒并将其固定在藻酸盐-聚氨基胺纳米凝胶中用于光催化应用

在此，我们报告了一种可行的方法来制备交联藻酸盐(Alg)和聚(胺胺)(PAMAM)纳米凝胶(algg -PAMAM ng)，使用水包油包水(w/o/w)双乳液路线，通过来自藻酸盐的阴离子基团与先前加入的Cu2+离子之间的强静电相互作用。在空气气氛下，用NaBH4在25℃条件下将纳米颗粒中的Cu2+离子包埋在Alg/PAMAM纳米凝胶中，原位制备了平均直径约为65 nm的CuO纳米颗粒。利用红外光谱、紫外-可见光谱以及扫描透射电镜(STEM)对制备的Alg-PAMAM和Alg-PAMAM- cuo纳米粒子进行了表征。PAMAM树状大分子的存在有助于获得结构紧凑的纳米凝胶和足够的CuO NPs稳定性。最后，在可见光照射下，通过水溶液中甲基橙的分解测试了Alg-PAMAM-CuO nggs的光催化性能。

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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