Hydrothermal Synthesis of Zinc Silicate Nanomaterials for Organic Dyes Removal from Aqueous Solutions

IF 2.8 3区材料科学 Q3 CHEMISTRY, PHYSICAL Silicon Pub Date : 2024-09-13 DOI:10.1007/s12633-024-03135-0

Xiaofang Qin, Honglan Cai, Feng Wang, Yanbin Xu

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Abstract

In recent years, the extensive use of organic dyes has caused great pollution to the water environment. Zinc silicate with excellent adsorption and photocatalytic properties has been widely used in the treatment of organic dye wastewater. Therefore, we successfully prepared zinc silicate nanomaterials by simple hydrothermal method using zinc sulfate heptahydrate (ZnSO₄·7H₂O) and tetraethyl orthosilicate (TEOS) as raw materials, and cetyltrimethylammonium bromide (CTAB) as surfactant, and applied them to the treatment of organic dye wastewater. The composition, morphology and specific surface area of zinc silicate nanomaterials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and Brunauer–Emmett–Teller (BET) method. The results show that the phase composition of the products has a transformation from hemimorphite Zn₄Si₂O₇(OH)₂·H₂O to vermiculite Zn₂SiO₄, and the morphology has also an obvious change from nanosheets, nanoflowers to nanoparticles with the increase of TEOS content. The specific surface area and pore volume are 199.8 m²/g and 0.441 cm³/g for the flower-like zinc silicate nanomaterials. The zinc silicate nanomaterials show excellent adsorption and photocatalytic properties for organic dyes from aqueous solutions, and the maximum removal efficiencies can reach 89.8% and 96.2% for rhodamine B (RhB) and methylene blue (MB), respectively.

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水热法合成用于去除水溶液中有机染料的硅酸锌纳米材料

近年来，有机染料的大量使用对水环境造成了极大的污染。硅酸锌具有优异的吸附和光催化性能，已被广泛应用于有机染料废水的处理。因此，我们以七水硫酸锌（ZnSO4-7H2O）和正硅酸四乙酯（TEOS）为原料，以十六烷基三甲基溴化铵（CTAB）为表面活性剂，采用简单的水热法成功制备了纳米硅酸锌材料，并将其应用于有机染料废水的处理。通过 X 射线衍射（XRD）、傅立叶变换红外光谱（FTIR）、场发射扫描电子显微镜（FESEM）和布鲁纳-艾美特-泰勒（BET）法对硅酸锌纳米材料的组成、形貌和比表面积进行了表征。结果表明，随着 TEOS 含量的增加，产品的相组成发生了从半晶态 Zn4Si2O7(OH)2-H2O 到蛭石态 Zn2SiO4 的转变，形貌也发生了从纳米片、纳米花到纳米颗粒的明显变化。花状硅酸锌纳米材料的比表面积和孔体积分别为 199.8 m2/g 和 0.441 cm3/g。硅酸锌纳米材料对水溶液中的有机染料具有优异的吸附和光催化性能，对罗丹明 B（RhB）和亚甲基蓝（MB）的最大去除率分别达到 89.8%和 96.2%。

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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来源期刊

Silicon CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.90

自引率

20.60%

发文量

685

审稿时长

>12 weeks

期刊介绍： The journal Silicon is intended to serve all those involved in studying the role of silicon as an enabling element in materials science. There are no restrictions on disciplinary boundaries provided the focus is on silicon-based materials or adds significantly to the understanding of such materials. Accordingly, such contributions are welcome in the areas of inorganic and organic chemistry, physics, biology, engineering, nanoscience, environmental science, electronics and optoelectronics, and modeling and theory. Relevant silicon-based materials include, but are not limited to, semiconductors, polymers, composites, ceramics, glasses, coatings, resins, composites, small molecules, and thin films.