{"title":"推进亚甲基蓝吸附法更精确测量氧化石墨烯比表面积","authors":"Pei Lay Yap, Deyu Wang, Dusan Losic","doi":"10.1002/admi.202500233","DOIUrl":null,"url":null,"abstract":"<p>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<sup>−1</sup>), GO (0.5–2.0 mg mL<sup>−1</sup>), 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.</p>","PeriodicalId":115,"journal":{"name":"Advanced Materials Interfaces","volume":"12 17","pages":""},"PeriodicalIF":4.4000,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202500233","citationCount":"0","resultStr":"{\"title\":\"Advancing Methylene Blue Adsorption Approach for More Precise Measurement of Specific Surface Area of Graphene Oxide\",\"authors\":\"Pei Lay Yap, Deyu Wang, Dusan Losic\",\"doi\":\"10.1002/admi.202500233\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>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<sup>−1</sup>), GO (0.5–2.0 mg mL<sup>−1</sup>), 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.</p>\",\"PeriodicalId\":115,\"journal\":{\"name\":\"Advanced Materials Interfaces\",\"volume\":\"12 17\",\"pages\":\"\"},\"PeriodicalIF\":4.4000,\"publicationDate\":\"2025-07-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/admi.202500233\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Materials Interfaces\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://advanced.onlinelibrary.wiley.com/doi/10.1002/admi.202500233\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Materials Interfaces","FirstCategoryId":"88","ListUrlMain":"https://advanced.onlinelibrary.wiley.com/doi/10.1002/admi.202500233","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
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.
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.