A comprehensive guide for characterization of adsorbent materials

Pellenz, Leandro; Oliveira, Carlos Rafael Silva de; Júnior, Afonso Henrique da Silva; Silva, Layrton José Souza da; Silva, Luciano da; Souza, Antônio Augusto Ulson de; Souza, Selene de Arruda Guelli Ulson de Maria; Borba, Fernando Henrique; Silva, Adriano da

doi:10.1016/j.seppur.2022.122435

Cited by 26 publications

(13 citation statements)

References 187 publications

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“…Various characterization techniques have been developed and used to study the chemical and physical properties of sorbents . The most commonly used physical characterization techniques to study the crystalline properties and textural properties of ENFs include XRD, gas sorption analysis, SEM, and transmission electron microscopy (TEM).…”

Section: Characterizationmentioning

confidence: 99%

Engineered Nanoporous Frameworks for Adsorption Cooling Applications

Shen,

Kumar,

Wahiduzzaman

et al. 2024

Chem. Rev.

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The energy demand for traditional vapor-compressed technology for space cooling continues to soar year after year due to global warming and the increasing human population's need to improve living and working conditions. Thus, there is a growing demand for eco-friendly technologies that use sustainable or waste energy resources. This review discusses the properties of various refrigerants used for adsorption cooling applications followed by a brief discussion on the thermodynamic cycle. Next, sorbents traditionally used for cooling are reviewed to emphasize the need for advanced capture materials with superior properties to improve refrigerant sorption. The remainder of the review focus on studies using engineered nanoporous frameworks (ENFs) with various refrigerants for adsorption cooling applications. The effects of the various factors that play a role in ENF−refrigerant pair selection, including pore structure/ dimension/shape, morphology, open-metal sites, pore chemistry and possible presence of defects, are reviewed. Next, in-depth insights into the sorbent−refrigerant interaction, and pore filling mechanism gained through a combination of characterization techniques and computational modeling are discussed. Finally, we outline the challenges and opportunities related to using ENFs for adsorption cooling applications and provide our views on the future of this technology.

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Section: Characterizationmentioning

confidence: 99%

Engineered Nanoporous Frameworks for Adsorption Cooling Applications

Shen,

Kumar,

Wahiduzzaman

et al. 2024

Chem. Rev.

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“…141,142 Carbon nanotubes and graphene adsorbents show relatively high consideration based on their modication abilities and more surface area as 1000 m 2 g −1 based on the composite type and preparation method. 143,144 Unlike all these adsorbents, the abovementioned polymeric adsorbents present a smaller pore size based on the polymerization conditions applied. The pore size is inversely proportional to surface area, still it favors the passage of adsorbates onto adsorbents.…”

Section: Surface Areamentioning

confidence: 99%

“…[151][152][153][154] Smaller sized adsorbents, such as nanocomposites and graphene-derived adsorbents can be monitored before and aer any treatment to determine the defects and other changes associated with layering, particle size, shapes of molecules, and cluster formation. 143…”

Section: Particle Sizementioning

confidence: 99%

Phytoremediative adsorption methodologies to decontaminate water from dyes and organic pollutants

Kanwal,

Rehman,

Imran

et al. 2023

RSC Adv.

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“…In a previous study, we used bioclay matrices with different hydration degrees for the adsorption of U(VI), and results indicated that dried bioclay samples presented a higher uranium(VI) uptake capacity than wet bioclay matrices (BMMT) samples, pointing out the importance of studying different hydration degrees of adsorbents . Other authors highlighted the importance of using spectroscopic techniques in adsorbent characterization for identifying chemical constituents to provide the Supporting Information on the synthesis or application of new adsorbents . In this way, further structural studies would provide additional insight into the surface structures of biocomposites to improve the versatility and accurate use of these types of materials.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Approach on Bulk and Surface Properties of Fungal Biomass-Clay Adsorbents: Effect of Temperature and Amount of Clay during Synthesis

Olivelli

Schampera

Woche

et al. 2022

Ind. Eng. Chem. Res.

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The physicochemical properties of an enhanced adsorbent material generated by clays and fungal biomass can be modified systematically. We used spectroscopic techniques to investigate the interaction mechanisms between biomass and clay and how surface properties change with synthesis temperature and clay amounts. Biomass-clay complexes were synthesized and either shock-frozen and freeze-dried or dried at 60 °C in the oven. Surface and bulk properties were analyzed by scanning electron microscopy, attenuated total reflectance-Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and by wettability and surface charge measurements. Interactions of specific biomass-related molecules with clay and changes in physicochemical properties were observed. Higher amounts of clay caused a decrease in particle aggregation while the biomass arranged more evenly. XPS proved interactions due to exchange reactions between Na from the clay and biomass external organic compounds. FTIR, wettability, surface charge, and XPS indicated a less ordered arrangement of the biomass on the clay when drying was performed at 60 °C. The properties of these types of materials define their potential use in future applications. These results indicate the possibility of the selective creation of bioclays: more hydrophobic, with a higher content of organic matter or more specific functional groups on the surface.

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A comprehensive guide for characterization of adsorbent materials

Cited by 26 publications

References 187 publications

Engineered Nanoporous Frameworks for Adsorption Cooling Applications

Engineered Nanoporous Frameworks for Adsorption Cooling Applications

Phytoremediative adsorption methodologies to decontaminate water from dyes and organic pollutants

Spectroscopic Approach on Bulk and Surface Properties of Fungal Biomass-Clay Adsorbents: Effect of Temperature and Amount of Clay during Synthesis

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