原位快速合成介孔普鲁士蓝-二氧化硅纳米复合材料,实现卓越的银离子回收性能

IF 2.8 4区 生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Ayman El-Sawaf, Dina A. Tolan, Maiada S. Abdelrahman, Islam Abd El-Hay, Mohamed Ismael, Abdelaal S. A. Ahmed, Emad A. Elshehy, Mahmoud T. Abdu
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引用次数: 0

摘要

背景多孔纳米结构二氧化硅-普鲁士蓝复合材料是一种极具潜力的从废水中去除和回收银离子的材料。普鲁士蓝(PB)是去除有毒和有价值离子的重要配位材料及其类似物之一,人们对普鲁士蓝的使用表现出浓厚的兴趣。这种快速合成技术可在几分钟内从混合前体溶液中直接制造出复合材料。总之,我们使用各种技术对合成的二氧化硅-普鲁士蓝复合材料进行了广泛分析,包括 XPS、HR-TEM、SEM、STEM-EDX 元素图、TGA/TDA 和 N2 吸附/解吸测量。该复合材料的 BET 表面积为 203 m2 g-1,总孔容积约为 0.283 cm3 g-1,中孔直径约为 20 nm。这种介孔二氧化硅-普鲁士蓝对银离子的去除效果显著,最大吸附容量为 107.5 mg g-1。在各种吸附等温线类型中,Langmuir 和 Sips 等温线的拟合效果最好,R2 值超过 0.984。此外,动力学分析表明,伪二阶模型准确地描述了银离子在合成吸附剂上的吸附。纳米颗粒表现出显著的长期稳定性,即使经过五个再生周期也能保持良好的重现性。© 2024 化学工业学会(SCI)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fast in-situ synthesis of mesoporous Prussian blue-silica nanocomposite for superior silver ions recovery performance

BACKGROUND

Mesoporous-nanostructured silica-Prussian blue composite is a highly potential material for silver ions removal and recovery from wastewater. Intense interest has been shown in the use of Prussian blue (PB), one of the important coordinated materials and its analogues in removal of toxic and valuable ions.

METHODS

The micro-emulsion template method enables the synthesis of Prussian blue (PB) within silica pores, yielding a nanostructured mesoporous silica-PB composite. This rapid synthesis technique allows for the direct fabrication of the composite from mixed precursor solutions within minutes. The resulting material is effective for selectively extracting silver ions from wastewater at a specific pH level.

RESULTS AND DISCUSSION

In summary, the synthesized SiO2-Prussian blue composite was extensively analyzed using various techniques including XPS, HR-TEM, SEM, STEM-EDX elemental maps, TGA/TDA, and N2 adsorption/desorption measurements. The composite exhibited a BET surface area of 203 m2 g−1 and a total pore volume of approximately 0.283 cm3 g−1with mesopores centered around 20 nm. This mesoporous SiO2-Prussian blue demonstrated significant effectiveness in removing silver ions, with a maximum adsorption capacity of 107.5 mg g−1. The Langmuir and Sips isotherms showed the best fit among various adsorption isotherm types, with R2 values exceeding 0.984. Additionally, kinetic analyses revealed that the pseudo-second-order model accurately described the adsorption of silver ions onto the synthesized adsorbent. The nano-particles exhibit remarkable long-term stability, maintaining good reproducibility even after five regeneration cycles. © 2024 Society of Chemical Industry (SCI).

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来源期刊
CiteScore
7.00
自引率
5.90%
发文量
268
审稿时长
1.7 months
期刊介绍: Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.
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