The triple action of sulfuric acid on the preparation of carbon-based solid acid from waste toner and its application

Fan, Yaru; Wang, Xin; Guo, Xingting; Pan, Huajie; Xing, Yuanquan; He, Yong; Yuan, Yaping; Zhang, Lili; Song, Yuyan; Liu, Yongmei; Shen, Shubao

doi:10.1039/d3nj00298e

Cited by 4 publications

(1 citation statement)

References 41 publications

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“…7 Currently, researchers have studied the potential applications of waste toner in different fields based on its properties, such as improving the performance of flocculants, 8 alumina films, 9 solar evaporation devices, 10 and oil-absorbing sponges 11 as additives. As a precursor, waste toner can be used to produce luminescent sensors (such as graphene quantum dots, 12 carbon quantum dots 13 ) porous carbon materials (such as graphene oxide hydrogels, 14 ) and magnetic functional materials (such as supercapacitors, 15 battery electrodes, 16 photocatalysts 17 ), providing ideas for the recycling and reuse of waste toner. However, waste toner generally contains carcinogenic organic compounds such as polycyclic aromatic hydrocarbons and dimethylnitrosamine, which can volatilize under high-temperature conditions.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-oxygen Co-doped Magnetic Micro-carbon Adsorbent Derived from Waste Toner Coupled with GFAAS for the Analysis of Trace Lead in Environmental and Biological Samples

2023

At.Spectrosc.

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Currently, the social stock and scrappage of printers are both huge. The waste toner collected from the ink cartridges is difficult to degrade and has a small particle size, so the common treatment method is landfill, resulting in environmental pollution and resource wastage. This research aims to exploit the abundant presence of carbon black and magnetic powder in waste toner to synthesize nitrogen and oxygen co-doped magnetic carbon materials. It speculates that the amidation reaction between with the amino group of L-cysteine and the carboxylate group of waste toner in mild one-pot conditions leads to the incorporation of nitrogen and oxygen atoms. It significantly enhances the hydrophilicity of waste toner reducing the contact angle from 138.1° to 41.0° and provides active sites for the adsorption of Pb(II). Building upon this material, a novel approach combining magnetic solidphase extraction with graphite furnace atomic absorption spectrometry has been developed for ultrasensitive lead analysis. This method demonstrates the detection limit of 43 ng L -1 with an RSD of 7.1% (CPb(II) = 0.2 μg L -1 ) and has been successfully employed for the analysis of trace lead in tap water, lake water, urine, and serum. Furthermore, this material exhibits rapid adsorption kinetics, robust resistance to matrix interferences, and low cost, thereby offering a novel avenue for mitigating environmental contamination through the concept of "waste-to-waste" treatment.

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Section: Introductionmentioning

confidence: 99%

Nitrogen-oxygen Co-doped Magnetic Micro-carbon Adsorbent Derived from Waste Toner Coupled with GFAAS for the Analysis of Trace Lead in Environmental and Biological Samples

2023

At.Spectrosc.

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Asymmetric Triple‐Functional Janus Membrane for Blood Oxygenation

Zhao,

Gao,

Chang

et al. 2023

Adv Healthcare Materials

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The oxygenation membrane, a core material of extracorporeal membrane oxygenation (ECMO), is facing challenges in balancing anti‐plasma leakage, gas exchange efficiency, and hemocompatibility. Here, inspired by the asymmetric structural features of alveolus pulmonalis, a novel triple‐functional membrane for blood oxygenation with a Janus architecture is proposed, which is composed of a hydrophobic polydimethylsiloxane (PDMS) layer to prevent plasma leakage, an ultrathin polyamide layer to enhance gas exchange efficiency with a CO2:O2 permeance ratio of ≈10.7, and a hydrophilic polyzwitterionic layer to improve the hemocompatibility. During the simulated ECMO process, the Janus oxygenation membrane exhibits excellent performance in terms of thrombus formation and plasma leakage prevention, as well as adequate O2 transfer rate (17.8 mL min−1 m−2) and CO2 transfer rate (70.1 mL min−1 m−2), in comparison to the reported oxygenation membranes. This work presents novel concepts for the advancement of oxygenation membranes and demonstrates the application potential of the asymmetric triple‐functional Janus oxygenation membrane in ECMO.

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Preparation of waste toner-derived magnetic adsorbent for analysis of lead in aqueous and oil-based foods

Qin,

Wang,

Wan

et al. 2025

Food Chemistry

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The triple action of sulfuric acid on the preparation of carbon-based solid acid from waste toner and its application

Abstract: Waste toner with high carbon content has the potential to become a carbon material, but its utilization is limited due to the low carbonization yield. In this work, a carbon-based...

Cited by 4 publications

References 41 publications

Nitrogen-oxygen Co-doped Magnetic Micro-carbon Adsorbent Derived from Waste Toner Coupled with GFAAS for the Analysis of Trace Lead in Environmental and Biological Samples

Nitrogen-oxygen Co-doped Magnetic Micro-carbon Adsorbent Derived from Waste Toner Coupled with GFAAS for the Analysis of Trace Lead in Environmental and Biological Samples

Asymmetric Triple‐Functional Janus Membrane for Blood Oxygenation

Preparation of waste toner-derived magnetic adsorbent for analysis of lead in aqueous and oil-based foods

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