Nanomaterials
·
2020
·Vol. 10
·期 3
·426
·
IF 4.324
Chen Hou,Dongyan Zhao,Wenqiang Chen,Hao Li,Sufeng Zhang,Chen Liang
In this work, magnetic CuFe2O4/Ag nanoparticles activated by porous covalent organic frameworks (COF) was fabricated to evaluate the heterogenous reduction of 4-nitrophenol (4-NP). The core-shell CuFe2O4/Ag@COF was successfully prepared by polydopamine reduction of silver ions on CuFe2O4nanoparticles, followed by COF layer condensation. By integrating the intrinsic characteristics of the magnetic CuFe2O4/Ag core and COF layer, the obtained nanocomposite exhibited features of high specific surface area (464.21 m2g−1), ordered mesoporous structure, strong environment stability, as well as fast magnetic response. Accordingly, the CuFe2O4/Ag@COF catalyst showed good affinity towards 4-NP via π-π stacking interactions and possessed enhanced catalytic activity compared with CuFe2O4/Ag and CuFe2O4@COF. The pseudo-first-order rate constant of CuFe2O4/Ag@COF (0.77 min−1) is 3 and 5 times higher than CuFe2O4/Ag and CuFe2O4@COF, respectively. The characteristics of bi-catalytic CuFe2O4/Ag and the porous COF shell of CuFe2O4/Ag@COF made a contribution to improve the activity of 4-NP reduction. The present work demonstrated a facile strategy to fabricate COF-activated nano-catalysts with enhanced performance in the fields of nitrophenolic wastewater treatment.Keywords:magnetic covalent organic frameworks;nanocomposite;core-shell;p-nitrophenol;reduction
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jiawei Wang,Ruirui Qiang,Qiaowei Miao,Ruiling Hu,Huihui Chen,Shaobo Guo,Zhifeng Liu
With antibiotic resistance on the rise due to misuse, the urgent need for new antibacterial materials has become paramount in global health. Herein, a CuFe 2 O 4 /MoS 2 (CFM) composite with a large specific surface area was synthesized through a simple hydrothermal method and physical adsorption, and the subsequent loading of silver nanoparticles (Ag NPs) onto its surface yielded the nanocomposite CuFe 2 O 4 /MoS 2 @Ag (CFMA) with a rough defect-rich surface. The nanocomposite demonstrates remarkable antibacterial activity against Escherichia coli , Staphylococcus aureus , and drug-resistant Salmonella ( T-Salmonella ) by releasing metal ions that alter the electrical potential of bacterial cell membranes, compromise the integrity of cell membranes, and produce reactive oxygen species that lead to oxidative stress. It thus achieves an antibacterial rate of 96 % against the three tested bacterial strains within just 20 min at a concentration of 200 μg/mL. The composite exhibits a broad-spectrum antibacterial effect against Gram-negative and Gram-positive bacteria, as well as drug-resistant bacteria. Moreover, CFM acts as a carrier that effectively prevents the aggregation of Ag NPs, and the magnetism of CuFe 2 O 4 facilitates the recovery of the antibacterial agent. This work provides new ideas and methods for the development of highly efficient, cost-effective, and biocompatible antibacterial materials.
研究领域:
材料科学
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微生物学
·
生物医学工程
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高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2023
·
IF 1.8
Chen Zichun,Su Tongming,Luo Xuan,Qin Zuzeng,Ji Hongbing
The CuFe 2 O 4 /In 2 S 3 composite was prepared by a simple mechanical grinding process and used for the photocatalytic degradation of tetracycline (TC) under visible light irradiation. The results showed that the photocatalytic degradation activity for tetracycline on the CuFe 2 O 4 /In 2 S 3 composite photocatalyst with a mass ratio of 1:3 was 95.2%, which was higher than that of 12 and 63% on pure CuFe 2 O 4 and In 2 S 3 alone, as well as 89% on CuFe 2 O 4 /In 2 S 3 (1:1) and 79% on CuFe 2 O 4 /In 2 S 3 (3:1). Tetracycline photodegradation on CuFe 2 O 4 /In 2 S 3 was a first-order reaction, and the rate constant of the tetracycline degradation reaction under visible light irradiation was 0.02162 min −1 , which was 38 and 3.1 times higher than that of CuFe 2 O 4 and In 2 S 3 alone, respectively. This characterization results showed that CuFe 2 O 4 /In 2 S 3 (1:3) composites showed the high photodegradation efficiency and the highest photogenerated carrier separation efficiency. In addition, on the optimal reaction condition, an optimal photodegradation of 95.2% for tetracycline would achieved. The stable construction of the CuFe 2 O 4 /In 2 S 3 heterojunction and the narrow band gap of CuFe 2 O 4 or In 2 S 3 enhance the light absorption capacity of the catalyst. The mechanism study shows that CuFe 2 O 4 and In 2 S 3 are excited by visible light to produce electrons, which transfer to the conduction band of CuFe 2 O 4 and In 2 S 3 . Subsequently, the separation and transfer of photogenerated holes and photogenerated electrons are effectively improved by the Z-scheme photogenerated carrier transfer mechanism. The photogenerated electrons can reduce O 2 to produce ·O 2 − , which together with h + on the valence band becomes the main oxidation active species in the reaction system, and efficient oxidative degradation of tetracycline can be achieved.
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高影响因子
MATERIALS & DESIGN
·
2017
·
IF 4.364
Yu-Ting Zhuang,Wei Gao,Yong-Liang Yu,Jian-Hua Wang
The design and preparation of high-performance catalysts with high catalytic activity and excellent durability that are both environmentally benign and cost-effective remains a considerable challenge. Herein, a facile strategy is reported for the fabrication of three-dimensional porous CuFe 2 O 4 cages, shortly as 3D CuFe 2 O 4 @C, by bubbling oxygen produced in situ through a CuFe 2 O 4 suspension, followed by thermal treatment in nitrogen atmosphere. The 3D CuFe 2 O 4 @C structure increases the surface area of CuFe 2 O 4 and provides a porous support structure. It is proposed to be a key in preventing the aggregation of CuFe 2 O 4 during practical use. 3D CuFe 2 O 4 @C is shown to be a highly active catalyst, not only for the hydrogenation of p -nitrophenol, but also for the reduction of methylene blue in aqueous medium . 3D CuFe 2 O 4 @C exhibits remarkable catalytic activity towards p -nitrophenol reduction, with a catalytic rate constant of 2.167 min − 1 that is 5.35 times higher than that with pristine CuFe 2 O 4 (0.405 min − 1 ). In addition, the 3D CuFe 2 O 4 @C catalyst has a high saturation magnetization of 51.9 emu g − 1 , indicating that it can be easily recycled using a magnet. The 3D porous metal oxide nanostructure shows promising potentials as candidates for the remediation of contaminated aquatic environments and meets the demands for addressing future environmental issues.
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DOI
高影响因子
WATER RESEARCH
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2026
·
IF 12.8
Pu Li,Zhiming Chen,Jie Teng,Jing Feng,Kunbo Wu,Feiyun Sun,Mingguo Peng,Guofen Rui,Yang Zhao,Mu Li
Heterogeneous Fenton-like catalysis offers a promising route for oxidative water treatment, yet its practical implementation remains constrained by the difficulty of integrating highly active powder catalysts into continuous-flow operation. Herein, we report a pore-confined CuFe 2 O 4 spinel catalyst coated on hierarchical SiO 2 particles and demonstrate its use in an up-flow fixed-bed reactor for continuous tetracycline degradation. A multi-cycle impregnation-precipitation strategy enables the progressive in-pore growth of CuFe 2 O 4 , achieving a high active-phase loading of 5.16 wt% while preserving accessible mesoporosity. Under continuous-flow operation at a hydraulic retention time of 5 min, the optimized Fe/Cu@SiO 2 -3 catalyst maintained >93% tetracycline removal over 60 min. Quenching experiments and ESR analysis identify •OH and 1 O 2 as the dominant oxidative species, indicating a dual radical/non-radical oxidation pathway. XPS and DFT calculations provide complementary evidence for an electronic-structure-level mechanism for the enhanced H 2 O 2 activation. Favorable adsorption (-0.80 eV) induces interfacial charge redistribution and raises the work function from 5.543 to 5.626 eV. PDOS reveals near-Fermi Cu 3d states and Fe 3d-O 2p coupling, supporting Cu-mediated electron transfer, Fe-O activation, and sustained Fe 3+ /Fe 2+ cycling through the Cu-O-Fe pathway during efficient interfacial peroxide conversion. This work links pore-confined spinel construction with continuous-flow Fenton-like catalysis, providing a structurally stable catalyst design with a mechanistically grounded understanding of the Fenton-like process.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 22
·1771
·
IF 3.2
Zhang Enlei,Xu Zhiyi,Song Xiaowen,Wang Shuyuan,Zhang Bengui,Xie Yingpeng,Wang Guosheng
Hydrogen peroxide (H 2 O 2 ) detection is of great significance in environmental monitoring, food safety, and clinical diagnosis. Copper doping into α-FeOOH nanorods significantly enhanced the sensitivity and stability for electrochemical detection of H 2 O 2 . The structure and surface morphology of the products were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The electrochemical properties of CuFe 2 O 4 /α-FeOOH were studied by cyclic voltammetry and amperometry. The results showed that the composition and morphology of the as-prepared products were dependent on the Cu doping level. When the Cu doping level was up to 10 mol%, a spinel copper ferrite (CuFe 2 O 4 ) phase was formed in the product, accompanied by a morphological evolution into nanoparticles. The CuFe 2 O 4 /α-FeOOH/FTO (Fluorine-doped tin oxide) electrode exhibited excellent performance to detection of H 2 O 2 with high sensitivity (125.86 μA·mM −1 ·cm −2 ) and a low detection limit (0.56 μM, S/N = 3). Finally, the possible mechanism of the CuFe 2 O 4 /α-FeOOH catalysts for H 2 O 2 detection was analyzed and discussed.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Danli Tang,Dengjie Zhong,Yongxian Zhou,Yunlan Xu,Tanxia Xiang,Wantao Li,Yuanfang Yang,Chunmiao Fan,Jisai Chen
In this study, the magnetic composite catalyst, CuFe2O4 modified Co-Al layered double hydroxide supported by alkali-activated N,S-codoped biochar (CFO/CoAl-LDH@K-NSBC) was developed to activate ozone to degrade methylene blue (MB). The MB degradation efficiency of the CFO/CoAl-LDH@K-NSBC/O3 system was 96.30% in 7 min, and it still remained at 92.85% after 5 cycles. Notably, in the pond water matrix, the degradation efficiency only decreased by 6.44% after five cycles, which confirmed its remarkable stability and application prospects. Electrochemical analysis revealed that the comodification of CFO and CoAl-LDH significantly enhanced the charge transfer and catalytic activity of K-NSBC. The results of material characterization and quenching experiments showed that highly exposed active sites, including oxygen vacancies (Ov), Co3+/Co2+, Fe3+/Fe2+, Cu2+/Cu+, pyridinic N, graphitic N and thiophenic S, synergistically drove O3 activation to generate 1O2, ·OH, and ·O2– to participate in MB degradation, among which 1O2 was the main reactive oxygen species. This study provides a novel approach for the preparation of environmentally friendly biochar-based multimetal oxides with high catalytic activity.
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DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2019
·Vol. 45
·期 6
·3541-3556
·
IF 2.064
Qin Qingdong,Xu Jian,Sun Tian,Xu Yan
Bimetallic Fe 0 -based catalysts have been shown to be effective heterogeneous catalysts for elimination of organic pollutants by activating persulfate (PS). In this study, copper ferrite (CuFe 2 O 4 ) was isothermally treated under a reducing atmosphere in order to load Fe 0 /Cu 0 bimetallic nanoparticles on the surface of CuFe 2 O 4 . The reduced CuFe 2 O 4 was then used as a magnetically separable catalyst for PS activation to remove methyl orange (MO) from aqueous solution. The experimental data followed well the pseudo-first-order kinetic model, and the reaction rate of the reduced CuFe 2 O 4 /PS system was 5.6 times greater than that of the CuFe 2 O 4 /PS system. The key operating parameters such as PS concentration, catalyst dosage and solution pH were investigated. Catalyst stability of reduced CuFe 2 O 4 was also tested by consecutive reuse cycles. Quenching experiments and electron spin resonance (ESR) spectroscopy revealed that the main reactive species was sulfate radical (SO
·− 4
). Intermediate products of MO degradation were determined by high performance liquid chromatography coupled with a high-resolution hybrid quadrupole time-of-flight mass spectrometer (LC-Q-TOF–MS) and the MO degradation pathways were proposed. Based on the analysis of catalytic activity and surface characteristics of reduced CuFe 2 O 4 , the enhanced reactivity of reduced CuFe 2 O 4 was mainly attributed to rapid corrosion of Fe 0 /Cu 0 bimetallic nanoparticles by PS. These findings illustrated that the reduced CuFe 2 O 4 /PS system may be an efficient technology for MO removal from wastewaters.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Deshan Cheng,Changwang Yan,Yuhang Liu,Yang Zhou,Dongdong Lu,Xiaoning Tang,Guangming Cai,Daiqi Li,Zhong Zhao,Xin Wang
Recycling of photocatalyst in wastewater treatment is a big challenge. Fixation of photocatalyst on a flexible surface of solid substrates is a promising solution. In this work, copper ferrite (CuFe 2 O 4 ) particles were loaded onto polydopamine (pDA) pretreated ceramic/polyester fabrics (CPF) via coprecipitation . The CPF not only acts as loading material for CuFe 2 O 4 particles, but also makes this photocatalyst convenient to recycle. The morphology, elemental composition and structure of the as-fabricated CPF/CuFe 2 O 4 were characterized by scanning electron microscope (SEM), Fourier transform Infrared (FT-IR) spectrometer, X-ray photoelectron spectroscopy (XPS) and X-ray diffractometer (XRD). The degradation rate of methylene blue (MB) by the CPF/CuFe 2 O 4 photocatalyst reached to 98.2% under visible light irradiation for 80 min, reflecting the excellent photocatalytic activity of the composites. The CPF/CuFe 2 O 4 demonstrated good photostability and recoverability, indicating its great potential in wastewater treatment. Moreover, the degradation mechanism and possible degradation pathway of MB by CPF/CuFe 2 O 4 photocatalyst were investigated.
研究领域:
环境科学
·
材料科学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiankang Tan,Weilun Qian,Huibin Zhang,Huazhen Cao,Guoqu Zheng
Copper ferrite (CFO) as an excellent spinel adsorption material can significantly reduce the concentration of As in water. This work explores a method to synthesize hydroxyl-rich copper ferrite (h-CFO) at a low cost and on a large scale via combining sintering method and hydrothermal treatment using CuO and Fe 2 O 3 as raw materials. This work has optimized the performance of h-CFO via adjusting atmosphere, temperature, holding time, and used it to removal As(V) in water. The results show that tetragonal CFO prepared at 800 °C for ten hours (h-CFO800-10 h-Air) has the best As(V) removal performance, h-CFO800-10 h-Air can reduced the concentration of As(V) from 10 mg L −1 to 4.77 μg L −1 in the acidic aqueous solution. Through XPS, BET, FTIR and Raman spectroscopy characterization, it can be known that the ability of h-CFO is related to its crystal form and the number of hydroxyls on its surface. The result of XPS and Raman spectroscopy also show that the As ion-containing in water will be interacted with the hydroxyls of the As ion-containing which has been adsorbed on h-CFO to form secondary adsorption.
研究领域:
环境科学
·
材料科学
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Yufei Liang,Lihong Zhao,Liangbin Chen
As typical antibiotic pollutants, oxytetracycline (OTC) and chlortetracycline (CTC) are widely present in water bodies and difficult to degrade naturally, posing potential threats to ecosystems and human health. To address this issue, this study successfully prepared two novel types of kaolin/corn straw biochars through high-temperature pyrolysis and nanoparticle modification, and investigated their adsorption performance for OTC and CTC in water. The characterization results showed that the two modified biochars had a high specific surface area and developed pore structures, which were conducive to improving adsorption efficiency. The batch adsorption experiments showed that the nano-CuFe2O4 modified biochar (KLBCCF) was superior to the nano-CuO modified biochar (KLBCC) in terms of adsorption capacity, interference resistance, and regeneration performance. The pseudo-second-order kinetic model and the Langmuir model can better fit the OTC and CTC adsorption processes by KLBCCF. At 318.15 K, the adsorption capacities of KLBCCF for OTC and CTC were determined to be 170.21 and 316.26 mg g−1, respectively. The thermodynamic analysis showed that the adsorption process was spontaneous, heat-absorbing, and entropy-increasing. The adsorption mechanisms of OTC and CTC on KLBCCF included pore filling, hydrogen bonding, surface complexation, electrostatic interactions, and π–π interactions. This study promotes the development process of efficient adsorbents and provides a theoretical basis for the effective removal of antibiotics.
研究领域:
环境科学
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材料科学
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化学工程
·
水污染控制
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Can Zhu,Yuehui Luo,Wanyun Tang,Nan Huang,Shiju Tao,Huan Yang,Hao Feng,Quanxin Li
The high value transformation of renewable lignocellulose is crucial for reducing carbon emissions and promoting sustainable development. This effort aims to demonstrate that bio-based cresol (an important high-value chemical) can be yielded from lignocellulosic biomass. This novel directed conversion was effectuated by coupling catalytic pyrolysis of lignocellulose into aromatic intermediates and catalytic hydroxylation of aromatic intermediates into bio-based cresol. We also developed a highly active and recyclable magnetic catalyst (Cu 0 -CuFe 2 O 4 @Biochar(HTR)), confirming that introducing Cu 0 into the copper-iron composite metal oxide catalyst promotes hydroxyl radicals formation and the synthesis of bio-based cresol. The Cu 0 -CuFe 2 O 4 @Biochar(HTR) catalyst exhibited high cresol selectivity (81.1 %) and high cresol yield (54.3 %) in catalytic hydroxylation of aromatic intermediates into bio-based cresol. Based on catalyst characterizations and hydroxyl radicals analysis, the presumable reaction mechanism related to the bio-based cresol synthesis was proposed. Potentially, this strategy may provide a beneficial pathway for developing high-value bio-based chemical (cresol) using renewable lignocellulosic biomass.
研究领域:
催化化学
·
可再生能源
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绿色化学
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生物质转化
·
材料科学
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高影响因子
危险品化学品经营许可证（带存储）