SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
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IF 10.753
Qiunan Sun,Xuejiang Wang,Yiyang Liu,Siqing Xia,Jianfu Zhao
In this study, expanded perlite supported oxygen vacancies-CuFe 2 O 4 (OVs-CFEp) was synthesized via a simple method and utilized as floating catalyst to activate peroxymonosulfate (PMS) for the removal of sulfamethazine (SMT) under visible light irradiation. OVs-CFEp/Vis/PMS synergy presents much superior performance than that of OVs-CFEp/Vis system and OVs-CFEp/PMS system. PMS was efficiently activated by OVs-CFEp at a wide range of pH values, while the degrading rate of SMT was up to 95% in OVs-CFEp/Vis/PMS system. Oxygen vacancies and ·O 2 − accelerated the conversion of Fe(III)/Fe(II) and Cu(I)/Cu(II). The combination of the floating loader boosted light absorption capacity and sufficiently prevented metal ions leaching , which was all beneficial to enhance catalytic performance and recyclability . Besides, the reactive oxygen species were investigated systematically, proving that visible light and OVs-CFEp could activate PMS to produce ·SO 4 − , ·OH, O 2 · − , and 1 O 2 reactive species. Furthermore, based on intermediates identification and Density Functional Theory (DFT) calculation, three types and seven main degradation pathways involving cleavage of bond, SMT molecular rearrangement, and hydroxylation reaction were proposed. So this high photo-absorbing catalyst coupling with advanced oxidation progress was promising for extensive environmental remediation.
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
ACS Catalysis
·
2024
·
IF 11.3
Haohan Wu,Bowen Liu,Yi Qi,Xueqing Qiu,Liheng Chen,Yanlin Qin
The electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) provides a viable pathway for the efficient utilization of biomass resources. However, designing and regulating the activity and selectivity of the corresponding electrocatalysts remain significant challenge. Spinel compounds show great potential as catalysts due to their adjustable electronic structures and notable catalytic properties, but their intrinsic low conductivity has limited their further application. Herein, a lignin-based carbon fiber (LCF) embedded CuFe2O4 catalyst (CuFe2O4/LCF) is successfully constructed using an electrospinning technique. The catalyst can efficiently and selectively synthesize 2,5-furandicarboxylic acid (FDCA) at a relatively low potential. The experimental results and theoretical simulations demonstrate that the introduction of lignin can significantly optimize the pregraphitic turbine carbon microstructure of the carbon fibers and facilitate rapid electron transfer between CuFe2O4 and the carbon layer. Furthermore, the ATd–O–BOh interactions on the surface of the CuFe2O4 spinel structure significantly enhance the adsorption capacity for the substrates and OH– species, effectively promoting the catalytic reaction. The findings hope to provide a unique perspective to improve the catalytic activity of lignin carbon fiber spinel catalysts and the stability of biomass value-added mechanism.
研究领域:
材料科学
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化学工程
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催化
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电化学
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可持续化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
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IF 5.31
Xiaoling Zhang,Mingbao Feng,Liansheng Wang,Ruijuan Qu,Zunyao Wang
Recently, the toxicity of sunscreen has received extensive attention due to their potential endocrine disrupting effect. In the present study, nitrogen and sulfur co-doped multi-walled carbon nanotubes loaded CuFe 2 O 4 (NS-CNTs/CuFe 2 O 4 ) catalyst was rationally designed and synthesized by co-precipitation method for the degradation of 2-phenylbenzimidazole-5-sulfonic acid (PBSA, a typical sunscreen addition). The catalyst was fully characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen gas uptake, and X-ray photoelectron spectroscopy. Then the kinetics, pathways and mechanisms of catalytic degradation of PBSA were studied in NS-CNTs/CuFe 2 O 4 activated peroxymonosulfate (PMS) solution. The catalyst showed high catalytic activity, stability and reusability in PBSA removal. The results of electron paramagnetic resonance (EPR) and quenching experiments suggested that sulfate radicals (SO 4 − ) predominated in the activation of PMS by NS-CNTs/CuFe 2 O 4 . The synergistic effect between CuFe 2 O 4 and NS-CNTs was proposed in PMS activation. In addition, eight degradation intermediates of PBSA were identified by liquid chromatography mass spectrometry (LC–MS), and degradation pathways were further proposed. Overall, this study provides insights of PBSA removal by NS-CNTs/CuFe 2 O 4 activated PMS at ambient temperature.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Vasanthakumar Vasudevan,Baoyou Pei,Wentao Xiong,Jiao He,Shixuan Li,Dongha Huang,Xu Liao,Jinqing Lin
The Fenton degradation process has attracted significant attention as a promising method for treating organic dye-contaminated wastewater. However, its industrial application is limited by unsatisfactory catalytic performance. In this study, we synthesized a novel heterogeneous CuFe 2 O 4 /Fe 2 O 3 /C HCP Fenton catalyst by calcining a Fe/Cu-containing hyper-crosslinked polymer (HCP) and investigated its efficacy in degrading methylene blue (MB) dye pollutants. The degradation experiments using MB revealed that the optimized CuFe 2 O 4 /Fe 2 O 3 /C HCP -2/H 2 O 2 catalytic system achieved an impressive degradation efficiency of 97 % (k=0.2374 min −1 within 14 min, along with a total organic carbon conversion efficiency of 58.5 %. This degradation rate was approximately six times higher than that of Fe 2 O 3 /C HCP /H 2 O 2 (41 %; k=0.0365 min⁻¹) catalytic system, highlighting its superior degradation capabilities. Additionally, CuFe 2 O 4 /Fe 2 O 3 /C HCP -2 exhibited a wide operational pH range (pH 3–9) and maintained high cycling efficiency even after five successive recycles, indicating robust stability and reusability. The enhanced Fenton catalytic performance of CuFe 2 O 4 /Fe 2 O 3 /C HCP -2 can be attributed to the high specific surface area and porosity of the hyper-crosslinked polymer precursor, which ensures uniform dispersion of Fe/Cu elements, significantly improving catalytic efficiency and stability. This study provides a feasible strategy to enhance Fenton degradation activity, aiding in the removal of organic dye pollutants from aqueous environments and purification systems.
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 Environmental Chemical Engineering
·
2023
·
IF 7.7
Jiajia Li,Yi Li,Manhua Chen,Xi Tang,Nianwen Zhu,Wenxuan Li,Qiong Mei,Shijun Yue,Yuping Tang,Qizhao Wang
The exploitation of magnetic recyclable and effective degradation photocatalysts with wide-pH-range response was essential to the practical application in the photo-Fenton process. In this study, Cd/CdS coupling with CuO/Fe 2 O 3 /CuFe 2 O 4 (CF) was employed to prepare an efficient and recyclable photocatalyst Cd/CdS-CuO/Fe 2 O 3 /CuFe 2 O 4 (CCCF). The obtained CCCF was utilized to activate H 2 O 2 for the photo-Fenton degradation of tetracycline after verifying optical properties and energy band structures. The photo-Fenton degradation performance of CCCF on tetracycline was researched in the effects of photocatalyst concentration, initial pH and H 2 O 2 volume. The photo-Fenton removal efficiency of CCCF+H 2 O 2 was capable of achieving 82.43 % under the optimal reaction condition, which was apparently higher than that of Cd/CdS and CF. The enhanced degradation efficiency could be owned to the effective carriers separation thanks to the p-n heterojunction . The development of such photocatalysts offers a new approach to degrading organic pollutants from industrial wastewater , making it a valuable tool for contaminants degradation.
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
ACS Sensors
·
2025
·
IF 9.1
Weizhong Tan,Lujing Zhao,Fei fei Li,Guangliang Cui,Pinhua Zhang,Changmin Shi
In this study, employing a 2D electrodeposition in situ assembly method, a high-performance H2S sensor based on a p-n type Cu2O-CuFe2O4 heterostructure ordered nanowire arrays was successfully fabricated on silicon substrates. Compared to Cu2O, Cu2O-CuFe2O4 nanowire arrays exhibits an ideal interfacial barrier structure and higher initial resistance, with a response to 10 ppm of H2S at room temperature (20 ± 3 °C) increased by 225 times and a response time reduced by over 2400 s. The sensor demonstrates exceptional sensitivity (LOD = 10 ppb; response = 234.5), selectivity, and humidity resistance (stable response ∼6000 to 10 ppm of H2S at 60–90% RH). Notably, it shows unique low-temperature-enhanced sensing, with a response of 8.365 × 104 to 10 ppm of H2S at −10 °C (vs 1.144 × 104 at 20 °C). The sensor was successfully applied to detect H2S in human oral exhaled breath, demonstrating its potential for noninvasive disease diagnosis and offering a promising approach for developing room-temperature breath analysis sensors.
研究领域:
生物医学传感器
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呼吸诊断学
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分子诊断
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纳米医学
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转化医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
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2018
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IF 5.651
Deyou Yu,Huagang Ni,Lili Wang,Minghua Wu,Xiaosu Yang
Dye effluent causes a serious problem to the environment and is of a great concern worldwide. CuFe 2 O 4 -based heterogeneous Fenton oxidation is considered as a promising approach for efficient dye effluent treatment . However, the high-temperature calcination of CuFe 2 O 4 makes this technique less applicability. In this study, nanoscale-confined precursor of CuFe 2 O 4 (NCFOH) was fabricated via a facile coprecipitation method with the confinement of hyperbranched polyamide (MHP) and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and BET measurement. Its catalytic performance for dye degradation was also tested. Despite of its amorphous structure, NCFOH possesses a much stronger catalytic performance than the precursor of CuFe 2 O 4 (CFOH) and calcined CuFe 2 O 4 (CFO) without the mediation of MHP. In addition, NCFOH even shows a similarly catalytic ability with the corresponding calcination (NCFO). The results reveal that particle size and specific surface area may play more important roles than crystalline structure in the catalytic performance. Furthermore, the cycling experiments suggest the high stability and applicability of NCFOH as a reusable catalyst for dye effluent treatment. This work demonstrates that the NCFOH has a potential of widespread commercialization as an excellent heterogeneous Fenton catalyst, and also provides deeper insights into the novel nanoscale-confined approach for fabricating low-cost and efficient catalysts.
研究领域:
环境科学
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材料科学
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催化
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 3
·037514
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IF 3.1
Na Zou,Xin Li,Weiwei Xu,Funa Meng,Zhaoxia Wang,Junhua Zhang,Xueliang Wang
The CuFe2O4 nanoparticles and the biomass carbon material (Bcn) were respectively synthesized by solid phase reaction method and pyrolysis method. Based on the good electrocatalytic performance of the composite of CuFe2O4 and Bcn for the oxidation of H2S, a sensor for continuous determination of H2S in real-time at lower working potential was constructed. The sensor can response to H2S in the concentration range of 5.0 nM–10.0 μM with high sensitivity, and it has good retention rate to H2S in simulated wound fluid. The use of the composite materials can avoid the deposition of sulfur as a by-product on the electrode surface, as well as avoid the interference of electroactive substances in the biological environment because the working potential of −0.2 V is lower than that used in other H2S sensors.
研究领域:
生物医学工程
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材料科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2018
·Vol. 20
·期 6
·1-16
·
IF 2.127
Zhang Sufeng,Zhao Dongyan,Hou Chen,Liang Chen,Li Hao
A facile and efficient one-pot method for the synthesis of well-dispersed hollow CuFe 2 O 4 nanoparticles (H-CuFe 2 O 4 NPs) in the presence of cellulose nanocrystals (CNC) as the support was described. Based on the one-pot solvothermal condition control, magnetic H-CuFe 2 O 4 NPs were in-situ grown on the CNC surface uniformly. TEM images indicated good dispersity of H-CuFe 2 O 4 NPs with uniform size of 300 nm. The catalytic activity of H-CuFe 2 O 4 /CNC was tested in the catalytic reduction of 4-nitrophenol (4-NP) in aqueous solution. Compared with most CNC-based ferrite catalysts, H-CuFe 2 O 4 /CNC catalyst exhibited an excellent catalytic activity toward the reduction of 4-NP. The catalytic performance of H-CuFe 2 O 4 /CNC catalyst was remarkably enhanced with the rate constant of 3.24 s −1 g −1 , which was higher than H-CuFe 2 O 4 NPs (0.50 s −1 g −1 ). The high catalytic activity was attributed to the introduction of CNC and the special hollow mesostructure of H-CuFe 2 O 4 NPs. In addition, the H-CuFe 2 O 4 /CNC catalyst promised good conversion efficiency without significant decrease even after 10 cycles, confirming relatively high stability. Because of its environmental sustainability and magnetic separability, H-CuFe 2 O 4 /CNC catalyst was shown to indicate that the ferrite nanoparticles supported on CNC were acted as a promising catalyst and exhibited potential applications in numerous ferrite based catalytic reactions.
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研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Feihao Shi,Haoru Shan,Di Li,Xia Yin,Jianyong Yu,Bin Ding
Fenton or Fenton-like technique, as one of the advanced oxidation processes, plays a significant role in the removal of non-easily degradable organic pollutants; however, most of such catalysts are fragile with poor structural integrity under large deformation, thereby restricting their wide applications. Herein, soft copper ferrite nanostructures functionalized silica nanofibrous membranes (CuFe 2 O 4 @SNM) were fabricated through a novel strategy with the combination of in-situ dopamine polymerization, ion adsorption, and cohesive precipitation method. Benefiting from the high metallic ion adsorption capacity of polydopamine together with the rapid co-precipitation of adsorbed ions on fiber surface in alkaline solution, the membranes possessed homogenously distributed nanostructured CuFe 2 O 4 , large specific surface area, and high pore volume, which are a benefit for the improvement of Fenton-like catalytic activity towards organic pollutants decomposition. The resultant soft CuFe 2 O 4 @SNM provided favorable catalytic performance towards organic pollutants with a relatively high degradation degree of 96% in 20 min, a fast removal rate of 0.148 min −1 , and outstanding recyclability. The successful preparation of such fascinating ceramic nanofibrous membranes would provide a reference for further exploitation of new type Fenton or Fenton-like catalysts with outstanding softness towards wastewater purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2021
·
IF 6.789
Hao Cai,Zichuan Ma,Tianci Zhao
CuFe 2 O 4 -coated pretreated biochars (CuFe 2 O 4 @PBC) were synthesized for the first time via a facile method by impregnating and calcinating Cu–Fe-ethanol solution to activate H 2 O 2 for the degradation of metronidazole (MNZ) at a wide pH range. CuFe 2 O 4 @PBC samples were characterized by XRD, SEM , VSM, XPS , and BET. The results showed that CuFe 2 O 4 coating, which is evenly distributed on the surface of HNO 3 -pretreated biochar, can provide more active sites to enable CuFe 2 O 4 @PBC to be activated by visible light. The introduction of biochar by impregnating and calcinating method effectively suppressed the aggregation of CuFe 2 O 4 and maintained its high surface area and pore structure. CuFe 2 O 4 @PBC composite can be separated easily by an external magnetic field . The PBC-400CuFe sample calcined under 400 °C showed superior photo-Fenton catalytic ability in MNZ degradation at a wide pH range (pH = 3–7) and exhibited high-efficiency degradation of about 96.3% with the dosage concentration of catalyst 0.4 g/L in the presence of H 2 O 2 at pH 3.0 within 60 min. While, at pH 7.0, the PBC-400CuFe material removed 91.1% MNZ within 120 min, and the degradation efficiency was still higher than that of traditional Fenton reaction and some Fenton-like reaction. The PBC-400CuFe showed good stability. After 5 times of repeated use, its removal rate was still above 89.1%. This study confirmed that O 2 • - and h + are both important radicals, but the •OH played a key role in the visible photo/CuFe 2 O 4 @PBC- H₂O₂ system. The results indicate that CuFe 2 O 4 @PBC is highly suitable for the wastewaters with high MNZ content under mild conditions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 18
·8277-8289
·
IF 2.7
Menghe Liu,Congyang Zou,Yong Wang,Zhuyou Zhou,Yufeng Ji
In this paper, the precursors of the target product were prepared using a simple solvothermal method. After pyrolysis of the precursors, a three-dimensional Fe/CuFe2O4@C (referred to as FCC) nanomaterial with a relief texture was successfully prepared, which was employed as a novel catalyst material for activated persulfate (referred to as PS) degradation, tetracycline (referred to as TC), in wastewater. X-ray photoelectron spectroscopy (XPS) revealed that Fe(III) and Cu(II) served as the primary active metal ions, while the formation of a surface carbon shell positively influenced electron transfer during catalytic degradation. A comprehensive investigation was conducted to assess the efficiency of FCC nanocatalysts in degrading TC under various conditions. The results demonstrated that the degradation rate of TC in the 100 min range was about 96% at concentrations of 0.2 g L−1 FCC and 1 mmol L−1 persulfate and pH 7. Quenching experiment results and EPR results consistently indicated that both free radical and non-radical pathways involved in TC degradation by FCC nanomaterials, and sulfate radicals, hydroxyl radicals, superoxide radicals and singlet oxygen were identified to be the main active substances. The degradation intermediates were analyzed by liquid mass spectrometry and toxicology. FCC, as a catalyst exhibiting high catalytic activity, demonstrates superior performance in the activated persulfate degradation of TC. The environmental risk associated with the degradation of intermediate products is significantly lower than that of TC itself. FCC holds significant potential for the degradation of antibiotics in wastewater.
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
危险品化学品经营许可证（带存储）