Bamboo-like carbon nanotubes derived from colloidal polymer nanoplates for efficient removal of bisphenol A

Wang, Pei; Xiao, Peiyuan; Zhong, Shuxian; Chen, Jianrong; Lin, Hongjun; Wu, Xilin

doi:10.1039/c6ta06971a

Cited by 56 publications

(14 citation statements)

References 37 publications

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“…3b), that can lead to the biochar having improved adsorption properties of organic pollutant (Borchardt et al, 2017). Three samples with different BET surface areas were selected for bisphenol A (BPA) absorption due to its potential toxicity to the environment and highly detection frequency in surface water (Chen et al, 2016;Wang et al, 2016).…”

Section: Mcn Production Mechanism In Biocharmentioning

confidence: 99%

Reveal a hidden highly toxic substance in biochar to support its effective elimination strategy

Luo

Lin

Liu

et al. 2020

Journal of Hazardous Materials

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With the aim to develop optimized biochar with minimal contaminants, it is important significance to broaden the understanding of biochar. Here, we disclose for the first time, a highly toxic substance (metal cyanide, MCN, such as KCN or NaCN) in biochar. The cyanide ion (CN -) content in biochar can be up to 85870 mg/kg, which is determined by the inherent metal content and type in the biomass with K and Na increasing and Ca, Mg and Fe decreasing its formation. Density functional theory (DFT) analysis shows that unstable alkali oxygen-containing metal salts such as K2CO3 can induce an N rearrangement reaction to produce for example, KOCN. The strong reducing character of the carbon matrix further converts KOCN to KCN, thus resulting biochar with high risk.However, the stable Mg, Ca and Fe salts in biomass cannot induce an N rearrangement reaction due to their high binding energies. We therefore propose that high valent metal chloride salts such as FeCl3 and MgCl2 could be used to inhibit the production of cyanide via metal interactive reaction. These findings open a new point of view on the potential risk of biochar and provide a mitigation solution for biochar's sustainable application.

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Section: Mcn Production Mechanism In Biocharmentioning

confidence: 99%

Reveal a hidden highly toxic substance in biochar to support its effective elimination strategy

Luo

Lin

Liu

et al. 2020

Journal of Hazardous Materials

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“…Metal ions, especially for transition metal ions, are toxic and hard to recycle in wastewater, surface water and ground water. 20 Therefore, it is necessary to develop an efficient metal ions sensor.…”

Section: Introductionmentioning

confidence: 99%

Acid-assisted hydrothermal synthesis of red fluorescent carbon dots for sensitive detection of Fe(iii)

Tan

Zhou

et al. 2017

RSC Adv.

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“…Due to the catalytic growth with a nitrogen supply during carbon nanotube (CNT) synthesis 1 – 7 , bamboo-shaped multi-walled CNTs (BS-MWCNTs), which have a compartmented structure inside the tube similar to that in bamboo, have been reported 8 – 16 . Their unique structure and properties, such as a relatively large surface area and defect sites, have drawn increasing attention and led to their utilization in many applications, including their use as an absorbent for organic pollutants 13 , 17 , for hydrogen storage 10 , 18 , in lithium-ion battery electrodes 12 , and in sensors 11 . In detail, BS-MWCNTs have many defect sites near the partition part of the compartments because the multi-layered graphene sheets comprising the partition part are open-ended at the surface of the BS-MWCNTs 1 , 8 , 9 , 15 , which inevitably develops to maintain the curvature of the compartmented part.…”

Section: Introductionmentioning

confidence: 99%

Direct curvature measurement of the compartments in bamboo-shaped multi-walled carbon nanotubes via scanning probe microscopy

Jang

2021

Sci Rep

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Bamboo-shaped multi-walled carbon nanotubes (BS-MWCNTs) have compartmented structures inherently obtained during their catalytic growth, and the curvature of the compartmented structure is known to be determined by the morphology of the metal catalysts. In this study, the inside curvature of the BS-MWCNTs was directly measured through scanning probe microscopy (SPM). The surface of the compartment structures of BS-MWCNTs has discontinuous graphene layers and different frictional force levels depending on the curvature direction. That of the inside curvature can be directly observed through tribological analysis by adding and subtracting the lateral force microscopy images obtained on opposite sides along the axial direction of the BS-MWCNT (diameter of 500 nm). This tells us the direction of the inside curvature of the BS-MWCNT, which was also confirmed by identifying the growth direction of the BS-MWCNTs via scanning electron microscopy. Our demonstration implies that SPM can give the same insight into the structural characterization of nanomaterials that is relatively inexpensive and more user-friendly than currently used methods.

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Bamboo-like carbon nanotubes derived from colloidal polymer nanoplates for efficient removal of bisphenol A

Abstract: Bamboo-like carbon nanotubes (b-CNTs) were synthesized and applied for the removal of bisphenol A from aqueous solutions.

Cited by 56 publications

References 37 publications

Reveal a hidden highly toxic substance in biochar to support its effective elimination strategy

Reveal a hidden highly toxic substance in biochar to support its effective elimination strategy

Acid-assisted hydrothermal synthesis of red fluorescent carbon dots for sensitive detection of Fe(iii)

Direct curvature measurement of the compartments in bamboo-shaped multi-walled carbon nanotubes via scanning probe microscopy

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