Acid-induced mixed-phase ammonium trivanadate nanostructures for superior adsorption of methylene blue dye from contaminated water

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-04-26 DOI:10.1016/j.mseb.2025.118365

Jaspreet Kaur, Naresh Kumar, Rajesh Kumar

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Abstract

Ammonium trivanadate nanostructures were synthesized via a sol–gel method by varying the solution acidity (pH 1, 3, and 5), yielding samples denoted as NVO-1, NVO-3, and NVO-5. Structural and morphological analyses confirmed the formation of two distinct crystalline phases: NH₄V₃O₈ with a maple-leaf-like morphology at pH 5, and NH₄V₃O₈·1.9H₂O exhibiting a web-like cage structure at pH 1. The intermediate pH (3) resulted in a mixed-phase composition. Among the samples, NVO-3 demonstrated superior mesoporous characteristics, with a broad pore size distribution (3–16 nm), a pore volume of 0.128 cm³/g, and a specific surface area of 24 m²/g, as determined by BET and BJH analyses. This optimized nanostructure exhibited remarkable adsorption capacity toward Methylene Blue dye, achieving ∼ 920 mg/g with ∼ 90 % removal efficiency within 3–5 min. The enhanced performance is due to electrostatic interactions; kinetic studies confirm pseudo-second-order chemisorption with high adsorption efficiency and excellent reusability.

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酸诱导混合相三钒酸铵纳米结构对污染水中亚甲基蓝染料的优越吸附性能

通过改变溶液酸度（pH 1、3和5），采用溶胶-凝胶法合成了三钒酸铵纳米结构，得到的样品分别为NVO-1、NVO-3和NVO-5。结构和形态分析证实，NH4V3O8在pH值为5时呈枫叶状，NH4V3O8·1.9H2O在pH值为1时呈网状笼状。中间pH值(3)导致混合相组成。通过BET和BJH分析，NVO-3具有较好的介孔特性，孔径分布较宽（3 ~ 16 nm），孔体积为0.128 cm3/g，比表面积为24 m2/g。该优化的纳米结构对亚甲基蓝染料表现出了显著的吸附能力，在3-5 min内达到了~ 920 mg/g，去除效率为~ 90%。动力学研究证实了伪二级化学吸附具有较高的吸附效率和良好的可重复使用性。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.