推进亚甲基蓝吸附法更精确测量氧化石墨烯比表面积

IF 4.4 3区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Pei Lay Yap, Deyu Wang, Dusan Losic
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引用次数: 0

摘要

氧化石墨烯(GO)的工业生产使用不同的氧化前驱体和加工条件,导致其含氧基团、结构和比表面积(SSA)的组成有很大的变化,这对其在不同应用中的性能至关重要。分光光度亚甲基蓝(MB)吸附法已成为传统氮物理吸附法的一种很有前途的替代方法。然而,该方法仍然缺乏标准化和优化的协议,限制了其在SSA测定中的可靠性和一致性。为了解决这一空白,本研究通过揭示吸附时间、氧化石墨烯和氧化石墨烯浓度、氧化石墨烯/氧化石墨烯比等关键实验参数的影响及其优化,以及采用单点和多点Langmuir等温线法确定氧化石墨烯对氧化石墨烯的最大吸附量的方法,系统地评估了基于氧化石墨烯的SSA表征的不确定性。一系列商业和实验室制备的不同形式的氧化石墨烯材料(粉末、气凝胶、薄膜和分散体)被用作模型系统。研究确定了最佳吸附参数,包括吸附时间(24 h)、MB浓度(0.005 ~ 0.02 mg mL−1)、GO浓度(0.5 ~ 2.0 mg mL−1)、MB/GO质量比(0.4 ~ 0.44)和单点MB吸附。这种改进的方案提供了一种强大、快速、低成本和可靠的表征和制造氧化石墨烯材料的质量控制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Advancing Methylene Blue Adsorption Approach for More Precise Measurement of Specific Surface Area of Graphene Oxide

Advancing Methylene Blue Adsorption Approach for More Precise Measurement of Specific Surface Area of Graphene Oxide

Advancing Methylene Blue Adsorption Approach for More Precise Measurement of Specific Surface Area of Graphene Oxide

Advancing Methylene Blue Adsorption Approach for More Precise Measurement of Specific Surface Area of Graphene Oxide

Advancing Methylene Blue Adsorption Approach for More Precise Measurement of Specific Surface Area of Graphene Oxide

The industrial production of graphene oxide (GO) using various oxidizing precursors and processing conditions results in substantial variability in their composition of oxygen-containing groups, structures, and specific surface area (SSA), which are critical to its performance in diverse applications. Spectrophotometric methylene blue (MB) adsorption has emerged as a promising alternative to the conventional nitrogen physisorption method. However, this method still lacks a standardized and optimized protocol, limiting its reliability and consistency in SSA determination. To address this gap, this study systematically evaluates the uncertainties in the MB-based SSA characterization by revealing the influence of key experimental parameters and their optimization, including adsorption time, GO and MB concentration, MB/GO ratio, and the methods for determining maximum MB adsorption capacity on GO using both single-point and multi-point Langmuir isotherm approaches. A series of commercial and lab-prepared GOs materials in different forms (powders, aerogels, films, and dispersions) are used as model systems. The study confirms the optimized parameters, including adsorption time (24 h), concentrations of MB (0.005–0.02 mg mL−1), GO (0.5–2.0 mg mL−1), MB/GO weight ratio (0.4–0.44), and single-point MB adsorption. This refined protocol offers a robust, rapid, low-cost, and reliable characterization and quality control of manufactured GO materials.

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来源期刊
Advanced Materials Interfaces
Advanced Materials Interfaces CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
8.40
自引率
5.60%
发文量
1174
审稿时长
1.3 months
期刊介绍: Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018. The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface. Advanced Materials Interfaces covers all topics in interface-related research: Oil / water separation, Applications of nanostructured materials, 2D materials and heterostructures, Surfaces and interfaces in organic electronic devices, Catalysis and membranes, Self-assembly and nanopatterned surfaces, Composite and coating materials, Biointerfaces for technical and medical applications. Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.
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