Spatial tuning of adsorption enthalpies by exploiting spectator group effects in organosilica carbon capture materials

Evers, Mario; Hauser, Karin; Hinze, Wolfgang G.; Klinkenberg, Nele; Krysiak, Yasar; Mombers, Daniel; Polarz, Sebastian

doi:10.1039/d4ta01381f

J. Mater. Chem. A

2024

DOI: 10.1039/d4ta01381f

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Spatial tuning of adsorption enthalpies by exploiting spectator group effects in organosilica carbon capture materials

Mario Evers,

Karin Hauser,

Wolfgang G. Hinze

et al.

Abstract: Functional gradient materials can process more complex tasks than a mixture of their homogeneous analogs. Generating such materials is difficult as it necessitates spatial control over chemical and/ or structural...

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Carbon Materials With Conductivity Gradients Allow Dynamic Screening of Steep Temperature Differences Along Thin Films

Berger,

Schöttle,

Lebeda

et al. 2024

Adv Funct Materials

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Carbon materials comprise a wide range of microstructures and excellent electrical and thermal properties while being cost‐effective and readily available. They can be obtained through carbothermal processes at high temperatures, starting from cellulose. Catalytically active compounds, for example, iron salts, strongly influence the carbon microstructure during the graphitization process. Different degrees of structural order can, therefore, be achieved by adjusting the concentration of the iron salts. An infusion withdrawal impregnation approach is used on filter paper to prepare a continuous gradient of the carbon microstructure. This structural change is accompanied by a continuous variation of the closely related electrical and thermal transport properties. Even more, the synergistic interplay of local sheet resistance and thermal diffusivity results in the formation of switchable temperature gradients when an external current is applied. Steady state temperature differences of up to 80 °C are observed along the centimeter‐scaled samples. The controllable temperature gradient formation will be of great interest for applications requiring a fast temperature screening. Furthermore, the temperature gradient can be imposed onto other materials, which will be particularly relevant for advanced thin film characterization applications.

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Carbon Materials With Conductivity Gradients Allow Dynamic Screening of Steep Temperature Differences Along Thin Films

Berger,

Schöttle,

Lebeda

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

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Spatial tuning of adsorption enthalpies by exploiting spectator group effects in organosilica carbon capture materials

Abstract: Functional gradient materials can process more complex tasks than a mixture of their homogeneous analogs. Generating such materials is difficult as it necessitates spatial control over chemical and/ or structural...

Cited by 1 publication

References 43 publications

Carbon Materials With Conductivity Gradients Allow Dynamic Screening of Steep Temperature Differences Along Thin Films

Carbon Materials With Conductivity Gradients Allow Dynamic Screening of Steep Temperature Differences Along Thin Films

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