COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Xuan Wu,Dedong Sun,Hongchao Ma,Chun Ma,Xinxin Zhang,Jun Hao
In this research, a novel magnetically recoverable composite catalyst, CuFe 2 O 4 @ZIF-67, was synthesized. CuFe 2 O 4 @ZIF-67 composite catalyst was applied to degrade methylene blue (MB) in water by activating peroxymonosulfate (PMS). The results showed that the degradation rate of MB (20 mg/L) reached 98.9% in 30 min in the 0.2-CuFe 2 O 4 @ZIF-67 (75 mg/L) + PMS (125 mg/L) system. Both electron paramagnetic resonance (EPR) studies and radical quenching experiments revealed that SO 4 − •, •OH, 1 O 2 and •O 2 − were involved in the degradation of MB. We proposed a catalytic mechanism of PMS activation by CuFe 2 O 4 @ZIF-67. With the synergistic effect of Co 3+ /Co 2+ , Fe 3+ /Fe 2+ and Cu 2+ /Cu + redox cycles, it can keep its outstanding catalytic activity. Recycling tests showed that the removal rate of MB can still be maintained above 85%, indicating that CuFe 2 O 4 @ZIF-67 has good reusability. In general, owing to its reusability and excellent catalytic activity, the CuFe 2 O 4 @ZIF-67 composite catalyst has a good application prospect in water pollution control.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2023
·Vol. 30
·期 3
·559-569
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IF 4.8
Feng Xing,Yin Pengfei,Zhang Limin,Sun Xiyuan,Wang Jian,Zhao Liang,Lu Changfang,Gao Zhihua,Zhan Yongxin
To deal with the growing electromagnetic hazards, herein a Co@CuFe 2 O 4 absorbing agent with excellent impedance matching at thin thickness was obtained via an innovative route of ball-milling assisted chemical precipitation and annealing. The as-prepared composite possesses excellent interface polarization ability due to sufficient contact between CuFe 2 O 4 NPs and flat Co, and this compressed Co lamella can also provide sufficient eddy current loss. Moreover, the dipole polarization, electron hopping/conduction, and structural scattering also contribute to the broadband microwave absorption of the composite. Thus, the minimum microwave reflection loss achieves −35.56 dB at 12.93 GHz for 1.8 mm thickness, and the broadest efficient absorption bandwidth can reach 6.74 GHz for a thinner thickness of 1.72 mm. The preparation method reported here can be referenced as a new-type route to manufacture electromagnetic absorbers with outstanding performance.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
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IF 6.735
Jun Li,Jianfei Yan,Gang Yao,Yunhong Zhang,Xiang Li,Bo Lai
In this study, CuFe 2 O 4 (CFO) magnetic nanoparticles are used as both particle electrode and catalyst for persulfate (PS), applying in the three-dimensional (3D) electrochemical process for atrazine (ATZ) degradation. We studied the effects of operating parameters (i.e., CFO dosage, PS concentration, initial pH, and current density) on ATZ degradation. The optimum ATZ degradation efficiency (>99%) and TOC removal (22.1%) were achieved after 35 min treatment with CFO dosage of 3.0 g/L, PS concentration of 4.0 mM, current density of 4 mA/cm 2 , and initial pH of 6.3. Several comparative studies of control experiments were carried out, confirming the superior performance of EC/CFO/PS system for ATZ degradation. CFO magnetic nanoparticle electrodes (MNPEs) exhibited a favorable stability during the five runs under optimal conditions. Quenching experiments and electron paramagnetic resonance (EPR) study proved that ATZ was destroyed by free radicals. Meanwhile, the monitored sulfate radical and hydroxyl radical concentration in EC/CFO/PS system revealed that sulfate radical was the dominant reactive radical in ATZ degradation process. Based on the detected intermediates by LC-MS, the pathways of ATZ degradation in the EC/CFO/PS system were proposed. Finally, the study proposed the reaction mechanism of EC/CFO/PS three-dimensional electrochemical process. In brief, EC/CFO/PS 3D electrochemical process was found to be a reliable technology for the remediation of surface water and groundwater contaminated by atrazine.
研究领域:
环境科学
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电化学工程
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污染控制技术
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DOI
高影响因子
CHEMOSPHERE
·
2022
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IF 8.943
Ting Chen,Zhiliang Zhu,Yue Wang,Hua Zhang,Yanling Qiu,Daqiang Yin
Facilitating reactive oxygen species (ROS) generation is an effective way to promote the heterogeneous catalytic efficiency for organics removal. However, the metal leaching in metal-based catalysts and the low activity of non-metallic materials restrict ROS production. In this work, the purpose was achieved by loading a small amount of spinel CuFe 2 O 4 onto porous carbon nitride substrate. The synthesized CuFe 2 O 4 @O–CN composite first to activate peroxymonosulfate (PMS), which produce a plenty of ROS (•OH, SO 4 • − and 1 O 2 ) for organics removal, leading to highly oxidation for diverse organics. Through the comparative analysis of the surface composition before and after reaction, we found that the interface multi-electron transfer routs, including surface Cu(II)/Cu(I), Fe(III)/Fe(II) and their cross interaction, participated in the redox cycle, giving rise to the rapid and massive production of ROS, so that DMPO and TEMP were instantly oxidized in electron paramagnetic resonance (ESR) detection. Importantly, the carrier of porous O–CN, which acted as the electron transfer mediator, not only favors PMS adsorption via surface –OH, but also facilitates the conversion between different metal species. As a result, the CuFe 2 O 4 @O–CN/PMS system can remove 99.1% BPA and achieve 52.6% mineralization under optimized conditions. Thus, this study not only sheds light on the tailored design of heterogeneous catalyst for organics removal and elucidates the interfacial catalytic mechanisms for PMS activation .
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
PubMed
高影响因子
MOLECULES
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2019
·Vol. 25
·期 1
·124
·
IF 3.06
Sufeng Zhang,Yongshe Xu,Dongyan Zhao,Wenqiang Chen,Hao Li,Chen Hou
A facile approach was successfully developed for synthesis of cellulose nanocrystals (CNC)-supported magnetic CuFe2O4@Ag@ZIF-8 nanospheres which consist of a paramagnetic CuFe2O4@Ag core and porous ZIF-8 shell. The CuFe2O4nanoparticles (NPs) were first prepared in the presence of CNC and dispersant. Ag NPs were then deposited on the CuFe2O4/CNC composites via an in situ reduction directed by dopamine polymerization (PDA). The CuFe2O4/CNC@Ag@ZIF-8 nanocomposite was characterized by TEM, FTIR, XRD, N2adsorption-desorption isotherms, VSM, and XPS. Catalytic studies showed that the CuFe2O4/CNC@Ag@ZIF-8 catalyst had much higher catalytic activity than CuFe2O4@Ag catalyst with the rate constant of 0.64 min−1. Because of the integration of ZIF-8 with CuFe2O4/CNC@Ag that combines the advantaged of each component, the nanocomposites were demonstrated to have an enhanced catalytic activity in heterogeneous catalysis. Therefore, these results demonstrate a new method for the fabrication of CNC-supported magnetic core-shell catalysts, which display great potential for application in biocatalysis and environmental chemistry.Keywords:CuFe2O4nanoparticles;cellulose nanocrystals;Ag nanoparticles;ZIF-8 catalysis;4-nitrophenol reduction
研究领域:
材料科学
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环境化学
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催化化学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Li Fu,Qingmei Chen,Suqi Deng,Li Jia
An economical and label-free fluorescent sensor was developed for the selective detection of Escherichia coli ( E. coli ) based on the competitive reduction of Cu 2+ in CuFe 2 O 4 magnetic particles (MPs) by E. coli and o -phenylenediamine (OPD). Cu 2+ in CuFe 2 O 4 MPs can oxidize OPD to generate 2,3-diaminophenazine (OPDox) with fluorescent property. The presence of E. coli can weaken the oxidative ability of CuFe 2 O 4 MPs toward OPD owing to the copper reductase activity of NADH dehydrogenase-2 (NDH-2) in E. coli . NDH-2 can reduce Cu 2+ to Cu + , thereby inhibiting the OPD oxidation and resulting in the decrease of the fluorescence of the system. Under the optimum conditions, the fluorescent sensor exhibited a wide linear response to E. coli in the concentration range of 10 3 – 10 6 cfu mL −1 , and the detection limit was calculated to be 5.8 × 10 2 cfu mL −1 . Furthermore, the feasibility of the sensor was verified by successful detection of E. coli in popsicle and swimming pool water samples. More importantly, the sensor utilized the magnetic property of CuFe 2 O 4 MPs to realize the phase separation, thus averting the interference of other impurities in the sample matrix.
研究领域:
分析化学
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生物技术
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环境科学
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微生物学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2021
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IF 8.198
Wendong Zhu,Ya Cheng,Ce Wang,Xiaofeng Lu
The exploration of novel nanozymes with a high catalytic efficiency is crucial for their biosensing applications. Intricate hollow nanostructures possess distinct hierarchical open and porous features, usually presenting fascinating physicochemical properties. In this work, we have demonstrated the fabrication of a hierarchical fiber-in-tube CuFe2O4@conducting polypyrrole (PPy) nanostructure for peroxidase mimicking. Owing to the unique confined structure and synergistic effect, an exceptional peroxidase-like performance of CuFe2O4@PPy is achieved compared with the pristine CuFe2O4 nanofibers and PPy nanotubes alone. The prepared catalyst displays a desirable long-term and cycling stability. The experimental results demonstrate the key role of the formation of hydroxyl radicals for peroxidase mimicking. Based on the outstanding peroxidase-like activity, a high-efficiency ascorbic acid (AA) colorimetric sensor is developed, also displaying a satisfactory selectivity. Furthermore, according to the high sensitivity of the CuFe2O4@PPy nanotubes to detect AA, a total antioxidant capacity (TAC) sensor for a series of real samples has been developed. This work provides a new approach to construct efficient nanozymes with high efficiencies and develop a simple TAC assay with further vision in the fields of biosensing and food technology.
研究领域:
生物传感
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纳米材料
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食品技术
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2017
·Vol. 46
·期 34
·11171-11179
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IF 4.029
Zezhou Yang,Fuqiu Ma,Yun Zhu,Sihui Chen,Ce Wang,Xiaofeng Lu
Synergistic effects play an important role in improving the catalytic activity for enzyme-like reactions. Compared to individual nanomaterials, a system consisting of multiple components usually exhibits enhanced catalytic activity as an enzyme mimic. Herein we describe the synthesis of CuFe2O4/Cu9S8/polypyrrole (PPy) ternary nanotubes as an efficient peroxidase mimic via a three-step approach involving an electrospinning process, annealing treatment and hydrothermal reaction. The remarkably enhanced catalytic activity of CuFe2O4/Cu9S8/PPy ternary nanotubes as peroxidase mimics over individual CuFe2O4 nanofibers, CuFe2O4/CuO composite nanofibers, CuFe2O4/CuS composite nanofibers, and PPy materials has been achieved, demonstrating the presence of a synergistic effect among the components. The steady-state kinetic experiment suggests a good catalytic efficiency of the CuFe2O4/Cu9S8/PPy ternary nanotubes. On the basis of high catalytic activity, a colorimetric platform for the sensitive detection of H2O2 and dopamine has been developed. This work not only offers a simple approach for the fabrication of a high performance peroxidase-like nanocatalyst, but also provides its promising potential applications in biosensors, medical diagnosis, and environmental monitoring.
研究领域:
材料科学
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生物传感
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医学诊断
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junge Xu,Weihao Yu,Ziwei Zhang,Fubin Deng,Shengkong Wang,Rusen Zou,Yingmu Wang,Baoling Yuan
Pollution from extensive sulfonamide antibiotic use is a critical research focus, particularly in the remediation of these antibiotics using composite materials. This study employed a CuFe 2 O 4 /ZIF-8 composite to activate sodium percarbonate (SPC) for the photo-Fenton-like degradation of the sulfonamide antibiotic sulfamethoxazole (SMX). The optimal conditions for SMX degradation were determined using the CuFe 2 O 4 /ZIF-8/SPC/Vis system: a ZIF-8 composite ratio of 40 %, catalyst dosage of 0.15 g/L, SPC concentration of 0.8 mM, and initial pH of 3.0, achieving complete SMX removal within 30 min. After five cycle tests, the leaching rates of copper and iron ions were 0.179 mg/L and 0.376 mg/L, respectively, significantly lower compared to the use of CuFe 2 O 4 alone as the catalyst (Cu: 0.46 mg/L, Fe: 1.43 mg/L). The radicals present in the system were identified, with their contribution rates ranked from highest to lowest as follows: ·OH > h + > ·O 2 – > CO 3 · - > 1 O 2 . Further mechanistic investigations revealed that the heterogeneous structures in CuFe 2 O 4 /ZIF-8 enhanced the efficiency of the photo-Fenton-like reaction by facilitating electron transfer. This study introduced an innovative approach for antibiotic treatment using the CuFe 2 O 4 /ZIF-8 composite under visible light irradiation and broadened the technical framework of SPC-based advanced oxidation processes (AOPs) for treating wastewater.
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xufei Li,Ting Chen,Yanling Qiu,Zhiliang Zhu,Hua Zhang,Daqiang Yin
The coupling of photocatalysis and peroxymonosulfate (PMS) activation is considered as a promising strategy for the removal of organic pollutants. However, the development of visible-light-excited efficient photocatalysts for PMS activation remains challenging. Herein, a new recyclable dual Z-scheme g-C 3 N 4 /BiVO 4 /CuFe 2 O 4 (CN/BVO/CFO) heterojunction was first fabricated employing a simple hydrothermal approach. The results showed that the photocatalytic degradation behavior of levofloxacin (LEV) by CN/BVO/CFO under visible light illumination was enhanced compared with single BVO, CN, CFO and binary CN/BVO. Moreover, after adding PMS, the removal efficiency of LEV over CN/BVO/CFO/Vis/PMS system reached 96.2% within 60 min, which was 3.5 and 4.3 times higher than that of CN/BVO/CFO/Vis and CN/BVO/CFO/PMS, respectively. Characterization test and mechanism analysis indicated that the improved catalytic activity resulted from the dual Z-scheme heterostructure and the synergistic effect between photocatalysis and PMS activation, making the production of multiple active species. Additionally, CN/BVO/CFO/Vis/PMS system exhibited supreme mineralization ability, low degradation product toxicity and acceptable adaptability to solution pH, coexisting anions and organics. More importantly, the favorable magnetic separation and stability would provide convenience for the potential practical application of CN/BVO/CFO. This research may give a perspective on the design of efficient dual Z-scheme photocatalyst for PMS activation in environmental remediation.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Chao Lei,Mingli Ye,Jun Tang,Cun Yu,Sha Yu
In this study, the performance of an efficient magnetic core-shell heterostructure, CuFe 2 O 4 /CuS (referred to as CFOCS), was assessed for the disintegration of amoxicillin (AMOX) under simulated sunlight irradiation in the presence of peroxymonosulfate (PMS). The Characterization analyses demonstrated the successful construction of the CFOCS magnetic core-shell. Comparative studies demonstrated the superior performance of the CFOCS/PMS/xenon ternary system compared to binary and individual processes, with a synergy index (SI) of 1.21. The purification experiments illustrated that complete removal of the AMOX antibiotic was achieved under optimized conditions, including a pH of 7.0, PMS dosage of 2 mM, CFOCS quantity of 0.5 g L −1 , and AMOX concentrations of 10 and 20 mg L −1 . To elucidate the charge carrier migration pathway, a type II heterojunction model was proposed, supported by radical scavenging experiments, UV–Vis DRS, electrochemical impedance spectroscopy (EIS), and Mott-Schottky (M-S) analyses. The mechanistic investigation revealed the dual activity of PMS, which can be activated both in the aqueous solution under xenon light and on the catalyst surface through Cu (I) and Cu (II) centers. A key aspect of this study was a comprehensive aquatic hazard assessment of amoxicillin (AMX) in both treated and untreated aqueous solutions, utilizing the hazard quotient (HQ) method. Eventually, the investigated ternary system demonstrated remarkable efficiency in AMX degradation across various water systems, including lake water, tap water, and deionized water (DIW). Notably, the system maintained exceptional stability in all tested water bodies, underscoring the practical applicability of CFOCS catalyst in real-world scenarios.
研究领域:
环境科学
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化学工程
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药学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Yan Zhao,Min Song,Qi Cao,Peizhe Sun,Yonghao Chen,Fanyue Meng
CuFe 2 O 4 nanoparticles are decorated on biochar (BC) by modified sol-gel method to form the CuFe 2 O 4 @BC catalyst for persulfate (PS) activation in a wide pH range. The application of CuFe 2 O 4 @BC for o -nitrochlorobenzene degradation in soil was explored in this study. The mechanism of heterogeneous PS activation was comprehensively investigated. The synergistic effects between CuFe 2 O 4 and BC could enhance catalytic activity and stability, including well dispersed CuFe 2 O 4 species, efficient electron transfer and abundant oxygen functional groups. The superoxide radicals (O 2 − ) produced from CuFe 2 O 4 and BC could mediate Cu(I)/Cu(II) and Fe(II)/Fe(III) redox pairs on CuFe 2 O 4 @BC surface to activate PS, and then generating •OH and SO 4 − continuously. Moreover, the reaction intermediates are identified as well to elucidate the possible degradation pathways. These findings help to achieve more comprehensive understanding of the heterogeneous activation process of PS by CuFe 2 O 4 @BC catalyst.
研究领域:
环境科学
·
土壤修复
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）