Hierarchical multi-porous carbonaceous beads prepared with nano-CaCO3 in-situ encapsulated hydrogels for efficient batch and column removal of antibiotics from water

Yan, Yong‐Zhu; Zheng, Wei; Huang, Dan; Xiao, Zuoyi; Ha, Chang‐Sik; Zhai, Shangru

doi:10.1016/j.micromeso.2019.109830

Cited by 23 publications

(9 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides, the acid washing also assisted in opening up the micropores formed during the etching of the carbon framework by the CO 2 gases. [40] The successful removal of CaO from iMBCA was revealed from the XRD pattern of iMBCA-E, as shown in Figure 4a. Compared to iMBCA, post-acid etching followed by water washing resulted in high-purity carbon materials without calcium moieties.…”

Section: Enhanced Porosity Of 3d Carbon Aerogels Prepared With Imagmentioning

confidence: 96%

“…The appropriate co-existence of amorphous and graphitic carbon in iMBCA-E is believed to improve its wettability, which is essential for applications requiring enhanced mass transport. [40,41,44] The microstructural changes due to the one-step activationgraphitization of iMBA with confined CaCO 3 had a significant effect on the surface area and pore size distribution of iMBCA-E. The N 2 adsorption/desorption isotherm curves (Figure 4c) revealed that BCA-E mostly displayed mesopores.…”

Section: Enhanced Porosity Of 3d Carbon Aerogels Prepared With Imagmentioning

confidence: 98%

See 1 more Smart Citation

In Situ Mineralization of Biomass‐Derived Hydrogels Boosts Capacitive Electrochemical Energy Storage in Free‐Standing 3D Carbon Aerogels

Edathil

Rezaei

Almdal

et al. 2023

Energy & Environ Materials

View full text Add to dashboard Cite

Here, a novel fabrication method for making free‐standing 3D hierarchical porous carbon aerogels from molecularly engineered biomass‐derived hydrogels is presented. In situ formed flower‐like CaCO3 molecularly embedded within the hydrogel network regulated the pore structure during in situ mineralization assisted one‐step activation graphitization (iMAG), while the intrinsic structural integrity of the carbon aerogels was maintained. The homogenously distributed minerals simultaneously acted as a hard template, activating agent, and graphitization catalyst. The decomposition of the homogenously distributed CaCO3 during iMAG followed by the etching of residual CaO through a mild acid washing endowed a robust carbon aerogel with high porosity and excellent electrochemical performance. At 0.5 mA cm−2, the gravimetric capacitance increased from 0.01 F g−1 without mineralization to 322 F g−1 with iMAG, which exceeds values reported for any other free‐standing or powder‐based biomass‐derived carbon electrodes. An outstanding cycling stability of ~104% after 1000 cycles in 1 M HClO4 was demonstrated. The assembled symmetric supercapacitor device delivered a high specific capacitance of 376 F g−1 and a high energy density of 26 W h kg−1 at a power density of 4000 W kg−1, with excellent cycling performance (98.5% retention after 2000 cycles). In combination with the proposed 3D printed mold‐assisted solution casting (3DMASC), iMAG allows for the generation of free‐standing carbon aerogel architectures with arbitrary shapes. Furthermore, the novel method introduces flexibility in constructing free‐standing carbon aerogels from any ionically cross‐linkable biopolymer while maintaining the ability to tailor the design, dimensions, and pore size distribution for specific energy storage applications.

show abstract

Section: Enhanced Porosity Of 3d Carbon Aerogels Prepared With Imagmentioning

confidence: 96%

Section: Enhanced Porosity Of 3d Carbon Aerogels Prepared With Imagmentioning

confidence: 98%

In Situ Mineralization of Biomass‐Derived Hydrogels Boosts Capacitive Electrochemical Energy Storage in Free‐Standing 3D Carbon Aerogels

Edathil

Rezaei

Almdal

et al. 2023

Energy & Environ Materials

View full text Add to dashboard Cite

show abstract

“…Shi et al [ 33 ] synthesized 3D layered porous carbon with void space by dilute hydrochloric acid (HCl) assisted etching of self-assembled CaCO 3 template method combined with citric acid as a carbon source by pyrolysis and applied it in the anode of lithium-ion battery. Yan et al [ 34 ] successfully fabricated a new type of carbon bead with well-developed multilayer porosity by combining carbon thermal reduction and simple HCl treatment of CaCO 3 encapsulated carbon beads. A large number of interconnected mesopores and macropores effectively promoted the diffusion of tetracycline from the solution to the surface and inside the carbon beads, possessing notable adsorption and removal effects.…”

Section: Introductionmentioning

confidence: 99%

Preparation of N-Doped Layered Porous Carbon and Its Capacitive Deionization Performance

et al. 2023

View full text Add to dashboard Cite

In this study, N-doped layered porous carbon prepared by the high-temperature solid-state method is used as electrode material. Nano calcium carbonate (CaCO3) (40 nm diameter) is used as the hard template, sucrose (C12H22O11) as the carbon source, and melamine (C3H6N6) as the nitrogen source. The materials prepared at 850 °C, 750 °C, and 650 °C are compared with YP-50F commercial super-activated carbon from Japan Kuraray Company. The electrode material at 850 °C pyrolysis temperature has a higher specific surface area and more pores suitable for ion adsorption. Due to these advantages, the salt adsorption capacity (SAC) of the N-doped layered porous carbon at 850 °C reached 12.56 mg/g at 1.2 V applied DC voltage, 500 mg/L initial solution concentration, and 15 mL/min inlet solution flow rate, which is better than the commercial super activated carbon as a comparison. In addition, it will be demonstrated that the N-doped layered porous carbon at 850 °C has a high salt adsorption capacity CDI performance than YP-50F by studying parameters with different applied voltages and flow rates as well as solution concentrations.

show abstract

“…Promising adsorbents that have been described include activated charcoal/biochar, ,,, clay, and zeolites . Specifically for the removal of antibiotics, hierarchically multiporous carbon nanotubes, metal oxides/graphene, and functionalized mesoporous silica are examples of adsorbents used for this purpose, − with a focus on the synthesis of materials with high SSA in order to achieve high uptake capacity. However, although high SSA is desirable, antibiotic uptake is also influenced by the number of adsorption sites and the ability of the contaminant to access these sites.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, interaction with a solid surface possessing a framework composition can also enhance antibiotic adsorption. Most of the reported studies concerning the adsorption of antibiotics have employed functionalized mesoporous silica, obtained using postsynthesis treatments. − However, until now, no reports were found regarding the adsorption of AMX using Al-MCM-41 obtained by using isomorphic substitution during the hydrothermal synthesis process.…”

Section: Introductionmentioning

confidence: 99%

Insights on the Synthesis of Al-MCM-41 with Optimized Si/Al Ratio for High-Performance Antibiotic Adsorption

Macedo,

Gomes,

Moreno-Piraján

et al. 2023

ACS Omega

View full text Add to dashboard Cite

Studies indicate that approximately two-thirds of the rivers of the world are contaminated by pharmaceutical compounds, especially antibiotics and hormones. Data reported by the World Health Organization (WHO, 2015) revealed an increase of 65% in antibiotic consumption between 2000 and 2015, with a worldwide increase of 200% expected up to 2030. Environmental contamination by antibiotics and their metabolites can cause the alteration of bacterial genes, leading to the generation of superbacteria. In this work, adsorption was explored as a strategy to mitigate antibiotic contamination, proposing the use of the Al-MCM-41 mesoporous material as an efficient and high-capacity adsorbent. Evaluation of the influence of the synthesis parameters enabled understanding of the main variables affecting the adsorption capacity of Al-MCM-41 for the removal of a typical antibiotic, amoxicillin (AMX). It was found that the adsorbent composition and specific surface area were the main factors that should be optimized in order to obtain the highest AMX removal capacity. Using statistical tools, the best Si/Al ratio in Al-MCM-41 was found to be 10.5, providing an excellent AMX uptake of 132.2 mg per gram of adsorbent. The Si/Al ratio was the most significant factor affecting the adsorption. The cation−π interactions increased with an increase of the Al content, while the interactions involving silanols (Yoshida H-bonding and dipole–dipole hydrogen bridges) decreased.

show abstract

Hierarchical multi-porous carbonaceous beads prepared with nano-CaCO3 in-situ encapsulated hydrogels for efficient batch and column removal of antibiotics from water

Cited by 23 publications

References 53 publications

In Situ Mineralization of Biomass‐Derived Hydrogels Boosts Capacitive Electrochemical Energy Storage in Free‐Standing 3D Carbon Aerogels

In Situ Mineralization of Biomass‐Derived Hydrogels Boosts Capacitive Electrochemical Energy Storage in Free‐Standing 3D Carbon Aerogels

Preparation of N-Doped Layered Porous Carbon and Its Capacitive Deionization Performance

Insights on the Synthesis of Al-MCM-41 with Optimized Si/Al Ratio for High-Performance Antibiotic Adsorption

Contact Info

Product

Resources

About