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用于增强磷酸盐吸附的沸石上生长的非晶态ZrO层。

An grown amorphous ZrO layer on zeolite for enhanced phosphate adsorption.

作者信息

Tao Ying, Liu Shaojia, Dong Shizhi, Wang Chengguo, Qu Tao, Li Sinan, Li Lingling, Ma Zhuang

机构信息

College of Mining, Liaoning Technical University Fuxin 123000 P. R. China

School of Metallurgy Engineering, Liaoning Key Laboratory of Optimization and Utilization of Non-associated Low-grade Iron Ore, Liaoning Institute of Science and Technology Benxi 117004 P. R. China.

出版信息

RSC Adv. 2022 Jun 6;12(26):16751-16762. doi: 10.1039/d2ra01967a. eCollection 2022 Jun 1.

DOI:10.1039/d2ra01967a
PMID:35754910
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9170381/
Abstract

Zeolite supported amorphous metal oxide nanolayers with high specific surface area, abundant adsorption sites, and excellent reusability hold a bright prospect in the efficient removal of contaminants, yet it is proven to be still challenging to precisely regulate and control their synthesis. Herein, we reported a facile synthetic strategy for rational design and achieving the uniform and firm growth of an amorphous ZrO layer decorated on the surface of zeolite (ZEO@AZ) for enhanced phosphate adsorption. The Langmuir isotherm model and pseudo-second order kinetic equation well described the adsorption process towards phosphate solution, and the synthetized ZEO@AZ exhibited an excellent maximum adsorption amount of 24.98 mg g. Furthermore, the adsorption of phosphates on ZEO@AZ was confirmed to be chemisorption, endothermic and spontaneous. This approach for fabricating amorphous metal oxide nanolayers on a robust matrix may provide a new route for constructing composites with superb phosphate adsorption performance.

摘要

具有高比表面积、丰富吸附位点和出色可重复使用性的沸石负载非晶态金属氧化物纳米层在高效去除污染物方面前景广阔，但事实证明精确调控其合成仍具有挑战性。在此，我们报道了一种简便的合成策略，用于合理设计并实现负载于沸石（ZEO@AZ）表面的非晶态ZrO层的均匀且牢固生长，以增强对磷酸盐的吸附。朗缪尔等温线模型和准二级动力学方程很好地描述了对磷酸盐溶液的吸附过程，合成的ZEO@AZ表现出24.98 mg g的出色最大吸附量。此外，磷酸盐在ZEO@AZ上的吸附被确认为化学吸附、吸热且自发的。这种在坚固基质上制备非晶态金属氧化物纳米层的方法可能为构建具有优异磷酸盐吸附性能的复合材料提供一条新途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dece/9170381/db9cea9fcec2/d2ra01967a-f10.jpg
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