Efficient conversion of dimethylarsinate into arsenic and its simultaneous adsorption removal over FeCx/N-doped carbon fiber composite in an electro-Fenton process

Lan, Huachun; Li, Jianfei; Sun, Meng; An, Xiaoqiang; Hu, Chengzhi; Liu, Ruiping; Liu, Huijuan; Qu, Jiuhui

doi:10.1016/j.watres.2016.05.018

Cited by 75 publications

(27 citation statements)

References 30 publications

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“…Similar to that of FeC x /carbon composites reported elsewhere 52 – 54 , the appearance of C-Fe bonding (283.7 eV) confirms the formation of Fe 3 C in the obtained C-600. As shown in Figure S2b , the Fe 2p1/2 and Fe 2p3/2 peaks centered at 709.9 and 723.2 eV can be assigned to Fe 2+ 52 – 54 , which further indicates that the existence of Fe 3 C in the obtained C-600. In addition, compared to the CNSs reported before 55 – 57 , the route proposed by us is a low temperature and feasible scale-up for preparing CNSs.…”

Section: Resultssupporting

confidence: 87%

“…As shown in Figure S2a , the typical peaks at ca. 284.4 and 285.8 eV can be observed clearly, which can be attributed to the carbon layers in the obtained sample 52 . Similar to that of FeC x /carbon composites reported elsewhere 52 – 54 , the appearance of C-Fe bonding (283.7 eV) confirms the formation of Fe 3 C in the obtained C-600.…”

Section: Resultsmentioning

confidence: 69%

“…284.4 and 285.8 eV can be observed clearly, which can be attributed to the carbon layers in the obtained sample 52 . Similar to that of FeC x /carbon composites reported elsewhere 52 – 54 , the appearance of C-Fe bonding (283.7 eV) confirms the formation of Fe 3 C in the obtained C-600. As shown in Figure S2b , the Fe 2p1/2 and Fe 2p3/2 peaks centered at 709.9 and 723.2 eV can be assigned to Fe 2+ 52 – 54 , which further indicates that the existence of Fe 3 C in the obtained C-600.…”

Section: Resultsmentioning

confidence: 69%

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Water-assisted and controllable synthesis of core/shell/shell structured carbon-based nanohybrids, and their magnetic and microwave absorption properties

Yang

Cai

et al. 2017

Sci Rep

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By controlling the pyrolysis temperature, core/shell/shell structured Fe/Fe5C2/carbon nanotube bundles (Fe/Fe5C2/CNTBs), Fe/Fe3C/helical carbon nanotubes (Fe/Fe3C/HCNTs) and Fe/Fe3C/chain-like carbon nanospheres (Fe/Fe3C/CCNSs) with high encapsulation efficiency could be selectively synthesized in large-scale by water-assisted chemical vapor deposition method. Water vapor was proved to play an important role in the growth process. Because of α-Fe nanoparticles tightly wrapped by two layers, the obtained core/shell/shell structured nanohybrids showed high stabilities and good magnetic properties. The minimum reflection loss values of the as-prepared nanohybrids reached approximately −15.0, −46.3 and −37.1 dB, respectively. The excellent microwave absorption properties of the as-prepared core/shell/shell structured nanohybrids were considered to the quarter-wavelength matching model. Moreover, the possible enhanced microwave absorption mechanism of the as-prepared Fe/Fe3C/HCNTs and Fe/Fe3C/CCNSs were discussed in details. Therefore, we proposed a simple, inexpensive and environment-benign strategy for the synthesis of core/shell/shell structured carbon-based nanohybrids, exhibiting a promising prospect as high performance microwave absorbing materials.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 69%

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Water-assisted and controllable synthesis of core/shell/shell structured carbon-based nanohybrids, and their magnetic and microwave absorption properties

Yang

Cai

et al. 2017

Sci Rep

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“…Immobilizing catalyst on the electrode surface is usually performed through different techniques like electrospinning, [ 4,28 ] precipitation, [ 29–32 ] co‐precipitation, [ 33,34 ] and/or simple adsorption [ 35,36 ] of iron solutions in the presence of porous carbons. Although coating methods may develop well‐dispersed, promising Fe‐containing cathodes in lab‐scales, they are multi‐step procedures that are time‐ and energy‐consuming.…”

Section: Introductionmentioning

confidence: 99%

CNT Microtubes with Entrapped Fe₃O₄ Nanoparticles Remove Micropollutants through a Heterogeneous Electro‐Fenton Process at Neutral pH

Mohseni

Demeestere

Laing

et al. 2021

Advanced Sustainable Systems

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Catalyst‐coated carbon electrodes require two preparation stages: electrode assembly using carbon and polymeric binders and subsequent catalyst immobilization on the porous carbons electrode. Such conventional coating methods require several steps, which is time‐, chemical‐, and energy‐consuming. Also, polymeric binders can impair the porosity and block catalytic sites of final electrodes. This study introduces a novel one‐pot synthesis method in which Fe3O4 nanoparticles are entrapped within a multi‐walled carbon nanotube network, the latter being templated with microtubular geometry. Such carbon microtubes (CMT) represent a standalone geometry, serving as a binder‐free electrode for an energy‐efficient heterogeneous electro‐Fenton (HEF) process. Fe3O4‐containing CMTs remove carbamazepine (CBZ), a frequently detected pharmaceutical micropollutant in water bodies. While almost all literature reports degradation at acidic conditions requiring the use of acid, this material system functions at pH 7 ± 0.3 with lengthy reusability. The remarkable mineralization of the total oxidized CBZ emerges from the confinement of oxidation by‐products in CMTs’ 3D framework, where unselective radicals are formed once the electro‐generated H2O2 reacts with embedded Fe3O4. Additionally, the 3D network prevents the entrapped catalysts from leaching in acidic environments because of the increased local pH during electrolysis.

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“…Although straight removal of p-ASA and phenylarsonic acid (PAA) by adsorption has also been studied (Chen &Huang 2012, Hu et al 2017, Liu et al 2020, they were adsorbed much less strongly compared to As( ). So oxidizing organoarsenic pollutants to As( ) and then removing the released inorganic arsenic by adsorption could be a better choice to enhance the removal e ciency of them in aqueous solution (Lan et al 2016, Xie et al 2016a, Xie et al 2019.…”

Section: Introductionmentioning

confidence: 99%

Removal of p-arsanilic acid and phenylarsonic acid from water by Fenton coagulation process: influence of substituted amino group

Peng

et al. 2021

Environ Sci Pollut Res

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Phenylarsonic acid compounds, which were widely used in poultry and swine production, are emerging contaminants due to their considerable solubility in water and the highly toxic inorganic arsenic species forming potential during their biotic and abiotic degradation in the natural environment. Herein, we investigated the optimal conditions to treat typical organoarsenic contaminants ( p -arsanilic acid ( p -ASA) and phenylarsonic acid (PAA)) in aqueous solution based on Fenton-coagulation process for oxidizing them and capturing the released inorganic arsenic, and elucidated the in uence mechanism of substituted amino group on removal. Results showed that the pH value and the dosage of H 2 O 2 and Fe 2+ signi cantly in uenced the performance of the oxidation and coagulation processes. The optimal conditions for removing 20mg L -1 -As in this research were: 40mg L -1 Fe 2+ and 60mg L -1 H 2 O 2 (the mass ratio of Fe 2+ /H 2 O 2 = 1.5), initial solution pH of 3.0 and nal solution pH of 5.0 adjusting after 30 min Fenton oxidation reaction. Meanwhile, the substituted amino group observably in uence the oxidation and coagulation performance of phenylarsonic acid compounds. Amino group could make phenylarsonic acid compounds more easily be attacked by •HO and supply more binding sites for forming complexes with Fe 3+ hydrolysates, resulting in higher oxidation rate and better coagulation performance.

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Efficient conversion of dimethylarsinate into arsenic and its simultaneous adsorption removal over FeCx/N-doped carbon fiber composite in an electro-Fenton process

Cited by 75 publications

References 30 publications

Water-assisted and controllable synthesis of core/shell/shell structured carbon-based nanohybrids, and their magnetic and microwave absorption properties

Water-assisted and controllable synthesis of core/shell/shell structured carbon-based nanohybrids, and their magnetic and microwave absorption properties

CNT Microtubes with Entrapped Fe₃O₄ Nanoparticles Remove Micropollutants through a Heterogeneous Electro‐Fenton Process at Neutral pH

Removal of p-arsanilic acid and phenylarsonic acid from water by Fenton coagulation process: influence of substituted amino group

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Efficient conversion of dimethylarsinate into arsenic and its simultaneous adsorption removal over FeCx/N-doped carbon fiber composite in an electro-Fenton process

Cited by 75 publications

References 30 publications

Water-assisted and controllable synthesis of core/shell/shell structured carbon-based nanohybrids, and their magnetic and microwave absorption properties

Water-assisted and controllable synthesis of core/shell/shell structured carbon-based nanohybrids, and their magnetic and microwave absorption properties

CNT Microtubes with Entrapped Fe3O4 Nanoparticles Remove Micropollutants through a Heterogeneous Electro‐Fenton Process at Neutral pH

Removal of p-arsanilic acid and phenylarsonic acid from water by Fenton coagulation process: influence of substituted amino group

Contact Info

Product

Resources

About

CNT Microtubes with Entrapped Fe₃O₄ Nanoparticles Remove Micropollutants through a Heterogeneous Electro‐Fenton Process at Neutral pH