Magnetron sputtering of niobium thin films onto wood biochar to increase the selectivity for electrostatic attraction of anionic brilliant blue dye

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2024-11-28 DOI:10.1016/j.jtice.2024.105828

Adelício Lucas Alberto , Bárbara Luiza Brandenburg dos Santos , Marcelo Godinho , Cesar Aguzzoli , Yasmin Vieira , Luis Felipe Oliveira Silva , Bashir Adelodun , Sonaimuthu Mohandoss , Naushad Ahmad , Guilherme Luiz Dotto

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Abstract

Background

Magnetron sputtering was employed to deposit thin niobium films onto biochar surfaces to increase selectivity for electrostatic interactions.

Methods

Biochar samples were coated with niobium under various power levels and deposition times by magnetron sputtering. Each material was then characterized and tested for adsorption performance with an anionic model molecule.

Significant findings

Niobium impregnation raised the point of zero charge of the biochar by 0.33 to 0.94 pH units, expanding the pH range in which the niobium-coated adsorbents maintain a positively charged surface. Optimal adsorption was observed at 298 K with an adsorbent dose of 1 g L⁻¹ and pH 2.4. The highest adsorption capacity of 43.64 mg g⁻¹ was achieved with the sample produced at 150 W for 30 min. This study highlights that the efficacy of niobium-coated adsorbents depends on the balance between metal loading and accessible surface area, emphasizing that increased metal deposition can shift the dominant adsorption mechanism by modifying surface characteristics.

Abstract Image

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在木质生物炭上磁控溅射铌薄膜以提高阴离子亮蓝染料的静电吸引选择性

背景采用磁控溅射法在生物炭表面沉积铌薄膜，以提高静电相互作用的选择性。方法在不同功率水平和沉积时间下，通过磁控溅射法在生物炭样品上镀铌。重要发现铌浸渍将生物炭的零电荷点提高了 0.33 到 0.94 个 pH 单位，扩大了铌涂层吸附剂保持正电表面的 pH 范围。在 298 K、吸附剂剂量为 1 g L-1 和 pH 值为 2.4 的条件下，观察到了最佳吸附效果。在 150 W 条件下生产 30 分钟的样品吸附容量最高，达到 43.64 mg g-¹。这项研究强调，铌涂层吸附剂的功效取决于金属负载和可接触表面积之间的平衡，并强调增加金属沉积可以通过改变表面特性来改变主要的吸附机制。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.