One-step synthesis of Fe<sub>3</sub>O<sub>4</sub>/carboxylate-rich carbon composite and its application for Cu(<scp>ii</scp>) removal

Qu, Lingling; Jia, Jianzhong; Shi, Hefei; Luo, Zhijun

doi:10.1039/c5nj02545a

Cited by 19 publications

(12 citation statements)

References 46 publications

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“…Hence, in this work, CRC/Fe 3 O 4 magnetic composites were synthesized by the sol-gel self-combustion method ( Qu et al, 2016 ). The CRC/Fe 3 O 4 samples were characterized and applied in the Fenton process to degrade MB.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Heterogeneous Fenton Degradation of Organic Pollutants by CRC/Fe3O4 Catalyst at Neutral pH

et al. 2022

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Fe3O4-based heterogeneous Fenton catalysts have been widely employed for degrading organic pollutants, however it is challenging to use them in highly efficient and recyclable application in wastewater treatment. In this work, carboxylate-rich carbon (CRC)-modified Fe3O4 magnetic particles are prepared by the sol-gel self-combustion method, where CRC is obtained from the carbonization of sodium gluconate. The CRC/Fe3O4 catalyst exhibits high heterogeneous Fenton degradation performance. The complete 10 mg L−1 methylene blue (MB) removal is achieved in 180 min under conditions of 10 mM H2O2 and 1.00 g of L−1 CRC/Fe3O4 at neutral pH. After five cycles, the structure and morphology of CRC/Fe3O4 composites remained unchanged and the catalytic activity also remained unaltered. Moreover, phenol, benzoic acid (BA), sulfamethazine (SMT), and tetracycline (TC) were also degraded in the heterogeneous Fenton reaction using CRC/Fe3O4 as a catalyst. The strong coordinating ability of –COOH/ –COO– functionalities of CRC formed strong bonds with Fe(II/III) ions on the surfaces of Fe3O4 particles, which was conducive to adsorption of organic matter on the surface of the catalyst and promoted the occurrence of heterogeneous Fenton reactions. It was found that CRC/Fe3O4 had higher removal rates for the adsorptive exclusions of pollutants, such as TC and MB, whereas there were lower removal rates for phenol, BA, and SMT. This work brings potential insights for development of a novel adsorption-enhanced heterogeneous Fenton reaction for wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Enhanced Heterogeneous Fenton Degradation of Organic Pollutants by CRC/Fe3O4 Catalyst at Neutral pH

et al. 2022

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“…Cấu trúc và thành phần tinh thể của Fe3O4@CRC được khảo sắt bằng phổ XRD. Từ Hình 2a cho thấy trong giản đồ XRD [21]. Phổ hồng ngoại FITR (Hình 2b) được sử dụng để xác định các nhóm chức bề mặt của vật liệu Fe3O4@CRC.…”

Section: Các đặC Trưng Của Vật Liệuunclassified

Study on Adsorption of Nickel and Methylene Blue in Aqueous Solution by Magnetic Carboxylate-Rich Carbon

Doan

Thuong

Ngan

et al. 2021

EES

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In this study, magnetic carboxylate-rich carbon material (Fe3O4@CRC) was synthesized via a low-temperature carbonization method and applied as an adsorbent for adsorption of Ni(II) ions and methylene blue (MB) in aqueous solution. The synthesized Fe3O4@CRC was characterized by various techniques (XRD, FTIR, FE-SEM, TEM, EDX, VSM, and BET). The adsorption kinetics, isotherms, thermodynamics, and the effects of key adsorption factors, including the pH value, initial adsorbate concentration, contact time, adsorbent dose and temperature were investigated in detail. The results showed that Fe3O4@CRC exhibited a high adsorption capacity for MB and Ni(II) with the maximum adsorption capacity of 187.26 mg/g and 106.75 mg/g, respectively. The adsorption of MB and Ni(II) on Fe3O4@CRC was a spontaneous and endothermic process, and was best described with the first-order kinetic model, Freundlich (for MB) and Langmuir (for Ni(II)) isotherm models. In addition, Fe3O4@CRC could maintain a high adsorption capacity after many consecutive cycles. Therefore, the Fe3O4@CRC material can be used as a highly efficient adsorbent for the removal of heavy metals and dyes from wastewater due to the advantages of high adsorption performance, easy separation, and good reusability.

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“…Study. For kinetic study, a time-dependent adsorption experiment was performed with a nanosorbent dose of 0.25 g L −1 and 20 ppm Cu 2+ solution under stirring for different intervals of time (3,5,15,30,60,120,240,360,480,960,1440, and 2400 min). Obtained adsorption results were fitted in with pseudo-first-order, second-order, and intraparticle diffusion models to describe the kinetic characteristics of the nanosorbent material.…”

Section: Adsorption Experiments For Kinetics and Isothermmentioning

confidence: 99%

“…26−29 Qu et al used Fe 3 O 4 / carboxylate-rich carbon composites for Cu 2+ removal and showed a comparison with various Fe 3 O 4 nanostructure-based adsorbents reported in the literature, which exhibit Cu 2+ adsorption capacity below 67 mg g −1 . 30 Xu et al prepared iron oxide nanoparticle-immobilized Phanerochaete chrysosporium and found their Pb 2+ removal capacity of 176.3 mg g −1 . 31 Recently, amino-functionalized magnetite/kaolin clay has been reported for enhanced removal of Pb 2+ , Cu 2+ , and Cd 2+ with adsorption capacities of 86.6, 16.5, and 22.1 mg g −1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption is one of the simple methods and cost-effective processes for heavy metal removal from contaminated water and waste. Various metal oxide nanostructure-based adsorbents have already been widely applied due to their high surface/volume ratio leading to a good adsorption capability. − Qu et al used Fe 3 O 4 /carboxylate-rich carbon composites for Cu 2+ removal and showed a comparison with various Fe 3 O 4 nanostructure-based adsorbents reported in the literature, which exhibit Cu 2+ adsorption capacity below 67 mg g –1 . Xu et al prepared iron oxide nanoparticle-immobilized Phanerochaete chrysosporium and found their Pb 2+ removal capacity of 176.3 mg g –1 .…”

Section: Introductionmentioning

confidence: 99%

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Single-Step Synthesis of Magnesium-Doped Lithium Manganese Oxide Nanosorbent and Their Polymer Composite Beads for Selective Heavy Metal Removal

Saravaia

Gupta

Popat

et al. 2018

ACS Appl. Mater. Interfaces

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Magnesium-doped lithium manganese oxide nanosorbent is prepared by a single-step solid-state method and characterized with appropriate analytical techniques, adsorption kinetic model, and isotherms. Competitive and noncompetitive adsorption studies are performed for a range of heavy metal ions. Prepared nanosorbent has shown explicit selectivity for various heavy metal ions and no remarkable influence of coexisting common interfering ions (Na + , K + , Mg 2+ , and Ca 2+ ), which generally coexist with all natural sources of water, contaminated water, and industrial waste. To achieve easy handling of an adsorbent, polysulfone−nanosorbent (PS−nanosorbent) composite beads are prepared, and their competitive heavy metal removal performance is determined. Competitive adsorption and regeneration studies have shown that PS−nanosorbent beads can be employed for selective heavy metal removal and reuse for multiple cycles.

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One-step synthesis of Fe₃O₄/carboxylate-rich carbon composite and its application for Cu(ii) removal

Abstract: A magnetically separable adsorbent, Fe3O4/carboxylate-rich carbon composite was synthesized via a facile one-step low temperature carbonization process.

Cited by 19 publications

References 46 publications

Enhanced Heterogeneous Fenton Degradation of Organic Pollutants by CRC/Fe3O4 Catalyst at Neutral pH

Enhanced Heterogeneous Fenton Degradation of Organic Pollutants by CRC/Fe3O4 Catalyst at Neutral pH

Study on Adsorption of Nickel and Methylene Blue in Aqueous Solution by Magnetic Carboxylate-Rich Carbon

Single-Step Synthesis of Magnesium-Doped Lithium Manganese Oxide Nanosorbent and Their Polymer Composite Beads for Selective Heavy Metal Removal

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One-step synthesis of Fe3O4/carboxylate-rich carbon composite and its application for Cu(ii) removal

Abstract: A magnetically separable adsorbent, Fe3O4/carboxylate-rich carbon composite was synthesized via a facile one-step low temperature carbonization process.

Cited by 19 publications

References 46 publications

Enhanced Heterogeneous Fenton Degradation of Organic Pollutants by CRC/Fe3O4 Catalyst at Neutral pH

Enhanced Heterogeneous Fenton Degradation of Organic Pollutants by CRC/Fe3O4 Catalyst at Neutral pH

Study on Adsorption of Nickel and Methylene Blue in Aqueous Solution by Magnetic Carboxylate-Rich Carbon

Single-Step Synthesis of Magnesium-Doped Lithium Manganese Oxide Nanosorbent and Their Polymer Composite Beads for Selective Heavy Metal Removal

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One-step synthesis of Fe₃O₄/carboxylate-rich carbon composite and its application for Cu(ii) removal