Journal of Water Process Engineering
·
2023
·
IF 7
Yajuan Li,Qiongfang Wang,Xin Zhang,Lei Dong,Yulin Yuan,Cheng Peng,Min Zhang,Pinhua Rao,Md. Nahid Pervez,Naiyun Gao
In this study, MFe 2 O 4 /WS 2 (M = Co, Cu, Mn, Ni) catalysts were synthesized to activate peroxymonosulfate (PMS) for sulfathiazole (STZ) degradation by decorating with WS 2 on the surface of a series of spinel-type transition metal oxides . It was found that the CoFe 2 O 4 /WS 2 /PMS exhibited a greater ability to degrade sulfathiazole (STZ) than other systems. More specifically, the catalyst facilitated Fe 3+ /Fe 2+ recycling to activate PMS efficiently and maintained synergies between CoFe 2 O 4 and WS 2 to degrade pollutants. The CoFe 2 O 4 /WS 2 dosage, PMS concentration, solution pH, inorganic anions, and natural organic matter, which could affect the catalytic efficiency, were inspected. The experimental results manifested that the catalyst displayed outstanding performance in the pH range from 5 to 9. Besides, electron paramagnetic resonance spectroscopy and radical quenching experiments confirmed the presence of HO•, SO 4 •− , O 2 •− , and 1 O 2 . Based on detected intermediates, the plausible degradation pathway of STZ was proposed.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 64
·40673-40681
·
IF 3.108
Xinlin Liu,Yingying Qin,Yongsheng Yan,Peng Lv
A magnetic photocatalyst, CdS/CoFe2O4/rGO, has been successfully prepared via a simple hydrothermal method. The photocatalytic activity of the as-obtained composite photocatalyst was evaluated using the degradation of tetracycline. When compared with single CdS and CoFe2O4, the hybrid material (CdS/CoFe2O4/rGO) can enhance the photocatalytic activity. The photocurrent responses and PL spectra indicate that the composite photocatalyst can effectively separate the electron–hole pairs and restrain their recombination. This was attributed to the high charge carrier mobility of rGO and the heterostructured photocatalytic system, which promotes the separation of charge carriers. In all, the CdS/CoFe2O4/rGO photocatalyst, as a strong magnetic photocatalyst, is promising for further practical application in wastewater treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 19
·4561
·
IF 4.2
Suiying Dong,Jiafu Dai,Ying Yang,Amir Zada,Kezhen Qi
The large-scale utilization of antibiotics has opened a separate chapter of pollution with the generation of reactive drug-resistant bacteria. To deal with this, in this work, different mass ratios of CoFe 2 O 4 /WO 3 nanocomposites were prepared following an in situ growth method using the precursors of WO 3 and CoFe 2 O 4 . The structure, morphology, and optical properties of the nanocomposite photocatalysts were scrutinized by X-ray diffraction (XRD), UV-visible diffuse reflectance spectra (UV-Vis DRS), photoluminescence spectrum (PL), etc. The experimental data signified that the loading of CoFe 2 O 4 obviously changed the optical properties of WO 3 . The photocatalytic performance of CoFe 2 O 4 /WO 3 composites was investigated by considering tetracycline as a potential pollutant. The outcome of the analyzed data exposed that the CoFe 2 O 4 /WO 3 composite with a mass ratio of 5% had the best degradation performance for tetracycline eradication under the solar light, and a degradation efficiency of 77% was achieved in 20 min. The monitored degradation efficiency of the optimized photocatalyst was 45% higher compared with the degradation efficiency of 32% for pure WO 3 . Capturing experiments and tests revealed that hydroxyl radical (·OH) and hole (h + ) were the primary eradicators of the target pollutant. This study demonstrates that a proper mass of CoFe 2 O 4 can significantly push WO 3 for enhanced eradication of waterborne pollutants.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Zhen Zhang,Yanzhou Jiang,Maoqiang Chi,Zezhou Yang,Guangdi Nie,Xiaofeng Lu,Ce Wang
This article reports the fabrication of magnetically responsive Au nanoparticles supported on CoFe 2 O 4 nanotubes through polyaniline (PANI) assisted self-assembly strategy which can be used as an efficient magnetically recoverable nanocatalyst. The central magnetic CoFe 2 O 4 nanotubes possess a strong magnetic response under an externally magnetic field, enabling an easy and efficient separation from the reaction system for reuse. The thorn-like PANI layer on the surface of CoFe 2 O 4 nanotubes provides large surface area for supporting Au nanocatalysts due to the electrostatic interactions. The as-prepared CoFe 2 O 4 /PANI/Au nanotube assemblies exhibit a high catalytic activity for the hydrogenation of 4-nitrophenol by sodium borohydride (NaBH 4 ) at room temperature, with an apparent kinetic rate constant ( K app ) of about 7.8 × 10 −3 s −1 . Furthermore, the composite nanocatalyst shows a good recoverable property during the catalytic process. This work affords a reliable way in developing multifunctional nanocomposite for catalysis and other potential applications in many fields.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Liping Qiu,Fanduo Meng,Qi Qiu,Xinwei Kang,Shuai Gong,Fengxia Zhang,Jingtao Xu,Feihong Wang,Daoji Wu,Xuewu Zhu
Membrane fouling represents a substantial barrier to the progress of ultrafiltration membranes. The catalytic membrane integrates ultrafiltration with advanced oxidation processes; this provides an efficient solution to mitigate membrane fouling. In this study, CoFe 2 O 4 nanoparticles were integrated into polyvinylidene fluoride (PVDF) to develop a novel composite ultrafiltration membrane (PVDF@CoFe 2 O 4 ). The chemical composition, surface morphology, filtration performance, and catalytic ability of the synthesized PVDF@CoFe 2 O 4 membranes were systematically assessed. The hydrophilicity of the PVDF@CoFe 2 O 4 membrane was enhanced, and its water flux increased by up to 1.4 times using CoFe 2 O 4 doping. The PVDF@CoFe 2 O 4 membrane demonstrated the lowest degree of irreversible fouling and superior stability. In the presence of peroxomonosulfate (PMS), the 2.5 wt% PVDF@CoFe 2 O 4 membrane achieved a norfloxacin (NOR) removal efficiency of 82.5 % within 120 min; this value significantly exceeded the 17.82 % efficiency recorded for the pristine PVDF membrane. The synergistic effect of SO₄ •- and •OH led to the conversion of natural organic matter (NOM) into smaller molecules following oxidation, thereby enhancing the antifouling performance of the membrane. These findings provide a promising approach for mitigating NOM-induced membrane fouling in natural surface water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2021
·
IF 6.064
Lezhu Su,Lizhou Ou,Yujiao Wen,Yifan Wang,Weilin Zhao,Zhi Zhou,Mei-e Zhong,Yongfa Zhu,Nan Zhou
Exploring catalyst materials which are advancing, recyclable and with high catalytic performances to remove persistent organic pollutants such as Quinclorac (QNC) is important. In this work, a novel N-doped carbon support CoFe 2 O 4 /Fe 0 hybrid catalyst (CFO/Fe@C) was in situ formed by a simple co-precipitation and calcination process. Fine intergrowth crystal CoFe 2 O 4 and Fe 0 were uniformly dispersed on the N-doped porous carbon that derived from the raw material Ethylene Diamine Tetraacetic Acid (EDTA), which also provided chelating effect to prevent the agglomeration of the metals. Interestingly, the Fe 0 could only be formed with the presence of cobalt, possibly due to the increased reduction property resulted from the particle refinement. The as-formed Fe 0 could not only activate the peroxymonosulfate (PMS) but also reduce the Co 3+ , resulting in a synergistic impact to remarkably enhance the degradation performance. Besides, the N-doped porous carbon can also benefit the degradation of pollutant by strengthening the electron transfer. A good degradation efficiency of QNC was obtained in CFO/Fe@C-PMS system and most of the QNC had been degraded to carbon dioxide , water and other small molecular organisms. The removal rate remained over 70% after four reuses and the material could be easily recovered from the solution due to the good magnetic properties. Therefore, the as-prepared CFO/Fe@C catalyst should be an ideal catalyst for the removal of organic pollutants .
研究领域:
环境科学
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催化材料科学
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DOI
高影响因子
Journal of Water Process Engineering
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2024
·
IF 6.3
Zhian Jin,Xuanting Zhao,Min Zhang,Ying Li,Jing Guo,Yeqing Lan,Cheng Chen
In order to achieve the environmental goal of waste treatment by waste, waste self-heating bags, a common household waste rich in iron oxide , activated carbon, and vermiculite , were reutilized as the raw material for the one-pot fabrication of a CoFe 2 O 4 composite (CoFe 2 O 4 -CV). The performance, mechanism, and application potential of CoFe 2 O 4 -CV for high-salinity wastewater remediation were investigated. The results indicated that the presence of activated carbon and vermiculite promoted the dispersion of CoFe 2 O 4 nanoparticles , which enhanced the catalytic performance of peroxymonosulfate (PMS) activation for Rhodamine B (RhB) degradation. At a concentration of 0.1 g/L CoFe 2 O 4 -CV and 0.5 mmol/L PMS, > 99% of RhB was eliminated within 15 min. CoFe 2 O 4 -CV also exhibited splendid recyclability due to its strong magnetism and stability. Quenching experiments and spectroscopic studies showed that dissolved free sulfate radicals (SO 4 •- ), surface-bound SO 4 •- (≡SO 4 •- ), singlet oxygen ( 1 O 2 ), and high-valence metal-oxo species (≡Co(IV)=O/≡Fe(IV)=O) jointly contributed to RhB degradation. Non-radical pathways involving ≡SO 4 •- , 1 O 2 , and ≡Co(IV)=O/≡Fe(IV)=O also played a crucial role. Moreover, ion competition experiments indicated that the CoFe 2 O 4 -CV activated PMS system showed anti-interference ability towards humic acid and high-concentration anions. Thus, the CoFe 2 O 4 -CV/PMS system achieved the effective removal of RhB and other dye contaminants under high-salinity conditions. This work demonstrates the practical possibility of waste reutilization treating high-salinity wastewater based on an advanced oxidation process .
研究领域:
环境科学
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催化材料
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废水处理
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产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 16
·8607-8614
·
IF 2.936
Lingxia Zheng,Lingtong Guan,Guang Yang,Sanming Chen,Huajun Zheng
CoFe2O4/reduced graphene oxide (CoFe2O4/rGO) hydrogel was synthesized in situ via a facile one-pot solvothermal approach. The three-dimensional (3D) network structure consists of well-dispersed CoFe2O4 nanoparticles on the surfaces of graphene sheets. As a binder-free electrode material for supercapacitors, the electrochemical properties of the CoFe2O4/rGO hybrid hydrogel can be easily adjusted by changing the concentration of the graphene oxide (GO) precursor solution. The results indicate that the hybrid material made using 3.5 mg mL−1 GO solution exhibits an outstanding specific capacitance of 356 F g−1 at 0.5 A g−1, 68% higher than the pure CoFe2O4 counterpart (111 F g−1 at 0.5 A g−1), owing to the large specific surface area and good electric conductivity. Additionally, an electrochemical energy storage device based on CoFe2O4/rGO and rGO was assembled, which exhibits a high energy density of 17.84 W h kg−1 at a power density of 650 W kg−1 and an excellent cycling stability with 87% capacitance retention at 5 A g−1 after 4000 cycles. This work takes one step further towards the development of 3D hybrid hydrogel supercapacitors and highlights their potential application in energy storage devices.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yang Liu,Bowei Zhang,Qingmin Wang,Gang Yu,Weidong Liu,Xia Bai,Lijie Dong
Thin, high-strength graphene films are at the forefront of research regarding electromagnetic interference (EMI) shielding applications. Herein, we synthesized a novel graphene-based film (CoFe2O4 nanoparticle-carbon nanotubes (CFO–CNTs)/reduced graphene oxide (RGO)p) reinforced with porous CFO–CNTs nanocomposites and self-cross-linking trimethylolpropane triacrylate between the RGO sheets. Only a 15-μm-thick (thin) CFO–CNTs/RGOp film exhibits an excellent EMI shielding effectiveness (EMI SE) value of 38.7 dB as well as an excellent tensile strength (84.5 MPa) because of synergistic interfacial and cross-linking interactions. Further, the film subjected to ultraviolet aging retains 86.6% and 82.4% of its original EMI SE and tensile strength, respectively, indicating high durability. Because of the outstanding integrated features and high durability, the as-prepared film can be used to shield aircrafts and miniaturized electronic devices from EMIs in extreme environments.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xiurong Zhu,Lei Ge,Wei Yan,Shengjiong Yang,Gen Wang,Delu Miao,Pengkang Jin
Heterogeneous activation of peroxymonosulfate (PMS) has been frequently proposed for the degradation of organic pollutants via the generation of reactive oxygen species (ROS). Spinel ferrite such as CoFe 2 O 4 shows great advantage for PMS activation but suffers from aggregation problem and lack of microstructure. Herein, network-like CoFe 2 O 4 immobilized on volcanic rock was synthesized for PMS activation for degrading sulfamethoxazole (SMX). The immobilized CoFe 2 O 4 network exhibited good catalytic performance for SMX removal. Systematic investigations, including in situ ATR-FTIR and Raman spectroscopy analysis, chemical quenching experiments and electron paramagnetic resonance (EPR) tests, revealed that a redox cycle of Co 2+ /Co 3+ induced the generation of ROS (SO 4 •− , OH • and 1 O 2 ) that participated in the degradation of SMX. Background constituents (e.g., inorganic ions and natural organic matters) exhibited limited influence on SMX removal. A continuous flow-through reaction in a fixed-bed column revealed the immobilized CoFe 2 O 4 network could efficient degrade SMX with long-term durability, which therefore can be a promising catalyst for PMS activation for the degradation of SMX.
研究领域:
环境科学
·
催化
·
水处理
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Zheng Huang,Bo Chi,Li Jian,Sun Youyi,Yaqing Liu
In this paper, CoFe 2 O 4 @multi-walled carbon nanotubes (MWCNTs) nanocomposite is synthesized by a hydrothermal process and in-situ composite technique as cathode catalyst for rechargeable Li-O 2 battery (LOB). The as-prepared materials are characterized by XRD , TEM, XPS , BET, TG-DSC and FT-IR. Electrochemical discharge and charge capacity of MWCNTs and CoFe 2 O 4 @MWCNTs nanocomposite electrodes are investigated at current density of 0.02 mA cm −2 in the voltage window of 2.0–4.5 V. LOB with CoFe 2 O 4 @MWCNTs nanocomposite electrode shows an initial discharge capacity of 1245 mAh g −1 (electrode) , with reversible charge capacity of 1242 mAh g −1 (electrode) , while LOB with only MWCNTs electrode has discharge capacity of 545 mAh g −1 (electrode) and charge capacity of 543 mAh g −1 (electrode) . LOB with CoFe 2 O 4 @MWCNTs nanocomposite electrode shows good rate capability and cycle stability. After 15 cycles, the capacity of 1175 mAh g −1 (electrode) is still retained at the current density of 0.02 mA cm −2 while 723 mAh g −1 (electrode) is retained at 0.5 mA cm −2 . The capacity retention of CoFe 2 O 4 @MWCNTs nanocomposite electrode is 94.4% at 0.02 mA cm −2 and 92.1% at 0.5 mA cm −2 , respectively. During discharge, Li 2 CO 3 and Li 2 O 2 are the main discharge products. The results show that the electrochemical performance of MWCNTs is greatly enhanced with CoFe 2 O 4 introduced as core-shell structure.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Shixue He,Chao Yang,Mingguang Niu,Dandi Wei,Shasha Chu,Mei Zhong,Jide Wang,Xintai Su,Lu Wang
Well-defined deposition of noble metal nanoparticles is attractive for the synthesis of heterogeneous metal catalysts with excellent activity, stability, and easy separability. Herein, a facile method combining surface coordination deposition with thermal decomposition has been proposed to fabricate Ag/CoFe 2 O 4 composites as magnetic catalysts for hydrogenation reduction of 4-nitrophenol and 2-nitroaniline. This method involved the adsorption of silver ions on cobalt-ferrous oxalate through the surface coordination, and then the thermal decomposition into Ag/CoFe 2 O 4 . The characterizations of XRD , SEM, FTIR, BET, VSM , XPS and Element mapping were utilized to reveal that Ag/CoFe 2 O 4 exhibited a magnetic saturation of 40.4 emu g −1 , a specific surface area of 58.8 m 2 g -1 , and an even distribution of metallic Ag on CoFe 2 O 4 particles. Catalytic reduction tests of 4-nitrophenol and 2-nitroaniline indicated that the Ag contents in Ag/CoFe 2 O 4 seriously affected the catalytic activity of the catalysts. Moreover, the durability test showed that Ag/CoFe 2 O 4 still preserved ∼74.6% of the initial catalytic activity even at the 20th run.
研究领域:
化学
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）