Reactive-Template Induced in-situ Hypercrosslinking Procedure to Hierarchical Porous Polymer and Carbon Materials

et al. 2021

Preprint

Novel hierarchical porous carbon materials (HPCs) were fabricated via a reactive template-induced in situ hypercrosslinking procedure. The effects of carbonization conditions on the microstructure and morphology of HPC were investigated, and the adsorption of methylene blue (MB) on HPC was explored. The as-prepared HPC has a hierarchical micro-, meso- and macropore structure, which results from the overlap of hollow nanospheres possessing microporous shells and macroporous cavities. The carbonization temperature, carbonization time and carbonization heating rate played important roles in tailoring the nanostructures of HPC. The BET specific surface area and micropore specific surface area can reach 2388 m2·g−1 and 1892 m2·g−1, respectively. Benefitting from the well-developed pore structure, the MB removal efficiency can reach 99% under optimized conditions. The adsorption kinetics and thermodynamics can be well described by a pseudo-second-order model and Langmuir model, respectively. Furthermore, such adsorption is characterized by a spontaneous endothermic process.

Section: Introductionmentioning

confidence: 99%

Structure Control of Novel Hierarchical Porous Carbon Material and its Adsorption Properties

Cai

Zhan

et al. 2021

Preprint

“…Porous inorganic material is one of the most active areas in materials science, not only for its fundamental scientific interest but also for its irreplaceable role in many modern-day technological applications. − Among these materials, hierarchical porous carbon (HPC) is very attractive because it can provide positive synergies between each pore system and then lead to multiple benefits. − These intriguing structural characteristics permit their use in a variety of applications, including energy storage, adsorption ,and catalysis. − …”

Section: Introductionmentioning

confidence: 99%

Teflon: A Decisive Additive in Directly Fabricating Hierarchical Porous Carbon with Network Structure from Natural Leaf

ACS Sustainable Chem. Eng.

Cao

Zheng

et al. 2017

Self Cite

Hierarchically porous carbons are of increasing importance due to their special physicochemical properties. The state-of-the-art approaches for synthesizing hierarchical porous carbon with network structure normally suffer from specific chemistries, rigid reaction conditions, high cost, and multiple tedious steps that limit their large scale production. Herein, we present an interesting insight into the important role of Teflon additive in fabrication of hierarchical porous carbon derived from biomass and, thus, use natural Indicalamus leaves for the first time to successfully synthesize hierarchical porous carbon with a three-dimensional morphology of interconnected nanoparticle units by using a facile and post-treatment-free carbonization technique. It is surprisingly found that the addition of Teflon not only reduces the synthesis procedure by combining post-removal of silica and carbonization in a single step but also plays a decisive role in generating the hierarchical carbonaceous network structure with a specific surface area as high as 1609 m 2 /g without any extra activation procedures. Benefiting from the combination of well-developed porosity and valuable hierarchical porous morphology, this type of hierarchical porous carbon has demonstrated attractive liquid-phase adsorption properties toward organic molecules.

Structural control of a novel hierarchical porous carbon material and its adsorption properties

Cai

Zhan

et al. 2022

Sci Rep

Novel hierarchical porous carbon materials (HPCs) were fabricated via a reactive template-induced in situ hypercrosslinking procedure. The effects of carbonization conditions on the microstructure and morphology of HPCs were investigated, and the adsorption of methylene blue (MB) on HPCs was explored. The as-prepared HPCs has a hierarchical micro-, meso- and macropore structure, which results from the overlap of hollow nanospheres possessing microporous shells and macroporous cavities. The carbonization temperature, carbonization time and carbonization heating rate played important roles in tailoring the nanostructures of HPCs. The BET specific surface area and micropore specific surface area can reach 2388 m2 g−1 and 1892 m2 g−1, respectively. Benefitting from the well-developed pore structure, the MB removal efficiency can exceed 99% under optimized conditions. The adsorption kinetics and thermodynamics can be well described by a pseudo-second-order model and Langmuir model, respectively. Furthermore, such adsorption was characterized by a spontaneous endothermic process.