Improving the cycling stability of biochar electrodes by purification via ion exchange

Zhou, Jingjie; Ren, Xiaodan; Liu, Zhifei; Yuan, Shuxia

doi:10.1016/j.mtsust.2022.100225

Cited by 3 publications

(3 citation statements)

References 69 publications

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“…Thus, ion exchange is also one of the main mechanisms of antibiotic adsorption by biochar. 48 As shown in Fig. 6(b-d), the adsorption of NOR by biochar before and after aging decreased with the increase of ionic strength.…”

Section: Adsorption Isotherms and Thermodynamicsmentioning

confidence: 76%

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Effects of aging methods on the adsorption of antibiotics in wastewater by soybean straw biochar

Li,

Jiang,

Liu

et al. 2023

J Sci Food Agric

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BackgroundThe environmental pollution and ecological risks caused by the widespread use of antibiotics have attracted attention in recent years. Biochar materials have a rich pore diameter and can effectively adsorb pollutants from wastewater. However, biochar will experience high temperatures, freezing, and thawing in nature, affecting its physicochemical properties and adsorption capacity. Three types of aged biochar were prepared by artificial simulated aging using soybean straw as raw material. The aged biochar's elemental composition and functional group species were investigated by characterization analysis, and their adsorption kinetics and adsorption isotherms were studied.ResultsThe specific surface area and pore size of the three aged biochars were lower than those of fresh biochars. The increased number of oxygen‐containing functional groups of the aged biochars would form a water cluster interaction with NOR, which was unfavorable to the adsorption of norfloxacin. The adsorption mechanism of biochar on NOR contains pore filling, electrostatic interaction, ion exchange and complexation.ConclusionThe adsorption of norfloxacin on biochar before and after aging was spontaneous and by quasi‐second kinetics and the Langmuir equation. Different aging methods influenced the physicochemical properties and adsorption performance of biochar, and the adsorption capacity of biochar was significantly reduced after aging. Therefore, the influence of climatic factors needs to be considered when using biochar to remove target pollutants.This article is protected by copyright. All rights reserved.

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Section: Adsorption Isotherms and Thermodynamicsmentioning

confidence: 76%

“…The increase in the number of positive charges competes with NOR in solution, resulting in lower adsorption of biochar. Thus, ion exchange is also one of the main mechanisms of antibiotic adsorption by biochar 48 …”

Section: Resultsmentioning

confidence: 99%

Effects of aging methods on the adsorption of antibiotics in wastewater by soybean straw biochar

Li,

Jiang,

Liu

et al. 2023

J Sci Food Agric

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“…Importantly, activation avoids the undesired C p variations (apparent increases in C p with cycle number) observed for C and C/Co samples. Increases in C p during cycling are related to electro-activation of the aerogels, a phenomenon that occurs due to cracking and pulverization of less stable areas of the electrode material after long cycling, [85,86] which in turn provide additional active surfaces to interact with the electrolyte during charge/discharge. Although this results in an apparent increase in storage capacity, the implications of poor electrode stability make this undesirable.…”

Section: Electrochemical Performancementioning

confidence: 99%

Multi‐Responsive Supercapacitors from Chiral Nematic Cellulose Nanocrystal‐Based Activated Carbon Aerogels

Andrew

Gillman

Walters

et al. 2023

Small

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The development of long‐lived electrochemical energy storage systems based on renewable materials is integral for the transition toward a more sustainable society. Supercapacitors have garnered considerable interest given their impressive cycling performance, low cost, and safety. Here, the first example of a chiral nematic activated carbon aerogel is shown. Specifically, supercapacitor materials are developed based on cellulose, a non‐toxic and biodegradable material. The chiral nematic structure of cellulose nanocrystals (CNCs) is harnessed to obtain free‐standing hierarchically ordered activated carbon aerogels. To impart multifunctionality, iron‐ and cobalt‐oxide nanoparticles are incorporated within the CNC matrix. The hierarchical structure remains intact even at nanoparticle concentrations of ≈70 wt%. The aerogels are highly porous, with specific surface areas up to 820 m2 g−1. A maximum magnetization of 17.8 ± 0.1 emu g−1 with superparamagnetic behavior is obtained, providing a base for actuator applications. These materials are employed as symmetric supercapacitors; owing to the concomitant effect of the hierarchically arranged carbon skeleton and KOH activation, a maximum Cp of 294 F g−1 with a capacitance retention of 93% after 2500 cycles at 50 mV s−1 is achieved. The multifunctionality of the composite aerogels opens new possibilities for the use of biomass‐derived materials in energy storage and sensing applications.

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Application of biogenic carbon in renewable energy vectors and devices: A step forward to decarbonization

Paritosh,

Bose

2024

Renewable and Sustainable Energy Reviews

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Improving the cycling stability of biochar electrodes by purification via ion exchange

Cited by 3 publications

References 69 publications

Effects of aging methods on the adsorption of antibiotics in wastewater by soybean straw biochar

Effects of aging methods on the adsorption of antibiotics in wastewater by soybean straw biochar

Multi‐Responsive Supercapacitors from Chiral Nematic Cellulose Nanocrystal‐Based Activated Carbon Aerogels

Application of biogenic carbon in renewable energy vectors and devices: A step forward to decarbonization

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