Synthesis of hierarchical porous carbon sphere via crosslinking of tannic acid with Zn2+ for efficient adsorption of methylene blue

Cao, Wenping; Li, Danni; Zhang, Sisuo; Ren, Jing; Liu, Xiaoning; Qi, Xinhua

doi:10.1016/j.arabjc.2023.105122

Cited by 8 publications

(1 citation statement)

References 66 publications

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“…The mechanism of action is shown in Figure a. First, CO in formaldehyde coordinates with Zn 2+ , , thus initiating the reaction. Subsequently, the obtained product undergoes an addition reaction with the neighboring para-position of resorcinol to form a six-membered cyclic chelate A.…”

Section: Resultsmentioning

confidence: 99%

Efficient Template-Catalyzed In Situ Polymerization for Carbon Xerogels with Large Specific Surface Area and High Adsorption

Wu,

Li,

et al. 2024

Langmuir

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The limited specific surface area (SSA), long preparation period, and high cost are significant challenges for carbon xerogels (CXs). To overcome these limitations, we propose an approach to prepare tannin-resorcinol-formaldehyde-based CXs through template-catalyzed in situ polymerization. ZnCl 2 acts as a catalyst and significantly accelerates the polymerization reaction through the coordination of Zn 2+ to the carbonyl group in formaldehyde, while atmospheric drying instead of special drying and without solvent exchange reduces the preparation period to 24 h. In addition, ZnCl 2 acts as an activator for the formation of many pores. Plant-derived tannins not only reduce the preparation cost but also regulate the pore structure. The resulted CXs with hierarchical porous structures show an optimal SSA of 1308 m 2 /g, high adsorption capabilities (for cationic, nitrosoaniline dyes, metal, and nonmetallic ions, especially for methylene blue with 454.93 mg/g), low shrinkage down to 10%, and reusability with 92.9% retention after 5 cycles. This work provides a promising and costeffective method for the large-scale preparation of porous carbon materials with large SSA, offering potential applications in adsorption, energy storage, and catalysis.

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Section: Resultsmentioning

confidence: 99%