Construction of novel NH2-Al-SBA-15 based mesoporous molecular sieve and application in the adsorption of methylene blue

IF 2.5 4区材料科学 Q2 CHEMISTRY, APPLIED Journal of Porous Materials Pub Date : 2024-07-03 DOI:10.1007/s10934-024-01647-z

Keren Shi, Ziyan Wang, Jiayu Luo, Guangyan Qian, Yuren Luo, Mingming Li, Huiqin Yao

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Abstract

Methylene blue is one of the most common compounds in mutagenic, teratogenic and carcinogenic dye wastewater. Adsorption is a simple and effective method for efficient treatment of organic wastewater. In this study, amine functionalized Al-SBA-15 mesoporous molecular sieves were prepared for adsorption of methylene blue solution. Solid waste fly ash was utilized as a cheap source of silica, which was combined with templating agent P123 to form Al-SBA-15 molecular sieves. Then silane coupling agent (APTES) was used to graft amine groups on the surface of Al-SBA-15 to improve the adsorption performance. The adsorption experiments showed that NH₂-Al-SBA-15 had the best adsorption performance, with 324 mg g⁻¹ against 200 mg L⁻¹ methylene blue solution in 500 min. But the adsorption of Al-SBA-15 was 311 mg g⁻¹. It proved that the functionalization increased the adsorption of methylene blue by the molecular sieve. Then the kinetic study was carried out, which showed that it conformed to the proposed secondary kinetics as well as Langmuir isothermal adsorption model. Then the effects of pH, adsorption temperature and methylene blue concentration on the adsorption performance were investigated. The optimal adsorption performance was obtained, and it resulted in the optimal adsorption pH value of 10, adsorption temperature of 25 °C, methylene blue concentration of 200 mg L⁻¹, and mass of adsorbent of 30 mg.

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基于 NH2-Al-SBA-15 的新型介孔分子筛的构建及其在亚甲基蓝吸附中的应用

亚甲基蓝是诱变、致畸和致癌染料废水中最常见的化合物之一。吸附是高效处理有机废水的一种简单而有效的方法。本研究制备了胺功能化 Al-SBA-15 介孔分子筛，用于吸附亚甲基蓝溶液。利用固体废弃物粉煤灰作为廉价的二氧化硅来源，与模板剂 P123 结合形成 Al-SBA-15 分子筛。然后用硅烷偶联剂（APTES）在 Al-SBA-15 表面接枝胺基团，以提高吸附性能。吸附实验表明，NH2-Al-SBA-15 的吸附性能最好，在 500 min 内对 200 mg L-1 亚甲基蓝溶液的吸附量为 324 mg g-1。但 Al-SBA-15 的吸附量为 311 mg g-1。这证明官能化增加了分子筛对亚甲基蓝的吸附。然后进行了动力学研究，结果表明它符合所提出的二级动力学以及 Langmuir 等温吸附模型。然后研究了 pH 值、吸附温度和亚甲基蓝浓度对吸附性能的影响。结果表明，最佳吸附 pH 值为 10，吸附温度为 25 °C，亚甲基蓝浓度为 200 mg L-1，吸附剂质量为 30 mg。

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来源期刊

Journal of Porous Materials 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.70%

发文量

203

审稿时长

2.6 months

期刊介绍： The Journal of Porous Materials is an interdisciplinary and international periodical devoted to all types of porous materials. Its aim is the rapid publication of high quality, peer-reviewed papers focused on the synthesis, processing, characterization and property evaluation of all porous materials. The objective is to establish a unique journal that will serve as a principal means of communication for the growing interdisciplinary field of porous materials. Porous materials include microporous materials with 50 nm pores. Examples of microporous materials are natural and synthetic molecular sieves, cationic and anionic clays, pillared clays, tobermorites, pillared Zr and Ti phosphates, spherosilicates, carbons, porous polymers, xerogels, etc. Mesoporous materials include synthetic molecular sieves, xerogels, aerogels, glasses, glass ceramics, porous polymers, etc.; while macroporous materials include ceramics, glass ceramics, porous polymers, aerogels, cement, etc. The porous materials can be crystalline, semicrystalline or noncrystalline, or combinations thereof. They can also be either organic, inorganic, or their composites. The overall objective of the journal is the establishment of one main forum covering the basic and applied aspects of all porous materials.