JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Chenyue Zhang,Zheng Wang,Fulin Li,Jiahao Wang,Nannan Xu,Yannan Jia,Shiwei Gao,Tian Tian,Wei Shen
CuFe 2 O 4 is often loaded onto biochar (BC) to prepare activated peroxodisulfate (PDS) catalysts for the removal of persistent organic pollutants from water. However, the activation mechanism remains unclear. Therefore, in this study, a BC-loaded CuFe 2 O 4 (CuFe 2 O 4 @BC) system that activates PDS was constructed and used to degrade the antibiotic tetracycline (TC). The synthesized materials were fully characterized, and the optimal reaction conditions of the system were determined to be a CuFe 2 O 4 @BC dosage and PDS concentration of 0.1 mg/L and 10 mM, respectively, under acidic conditions, achieving a TC removal of 30 mg/L. Under these conditions, the removal efficiency reaches 96.0 %. The synergistic effect of CuFe 2 O 4 and BC greatly improves catalytic performance and avoids the agglomeration of the metallic nanoparticles. The PDS-activation mechanism was studied through electron paramagnetic resonance and quenching experiments, revealing that TC is degraded under the combined effects of sulfate radicals (SO 4 •− ), hydroxyl radicals (•OH), and singlet oxygen ( 1 O 2 ). Two plausible degradation pathways of TC are proposed. Overall, this study provides a deeper understanding of metal-modified biochar activated PDS and provides a new strategy for the degradation of TC in this catalytic system.
研究领域:
环境科学
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催化材料
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2022
·Vol. 46
·期 11
·15376-15386
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IF 4.672
Tianle Li,Siddig Abuelgasim,Wenju Wang,Yupeng Xiao,Chenlong Liu,Yaoyao Ying,Dong Liu
Summary Soot particulate emitting from diesel engines are serious to both human health and environment. Efficient catalyst is vital in diesel particulate filter technology to decrease soot oxidation temperature. Cu 1−x K x Fe 2 O 4 (x = 0, 0.05, 0.1, and 0.15) catalysts are synthesized and analyzed with XRD, Raman, BET, SEM, TEM, TG, EDS, XPS, catalytic activity tests, and kinetic analysis. The results suggests that many factors affect the catalytic activity, and the contents of oxygen vacancies are dominant. A large amount of oxygen vacancies which facilitate to the soot oxidation are created with the assistance of K + , and they increase with the increasing doping contents. Excessive surface concentration of K + may lead to the partially covering of active sites of the catalysts. Therefore, Cu 0.9 K 0.1 Fe 2 O 4 catalyst exhibits the best catalytic activity in soot oxidation, which decreases the T max of soot by 279°C. This decrease makes it highly promising for application in diesel particulate filter.
研究领域:
环境科学
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催化化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2020
·Vol. 27
·期 17
·21542-21551
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IF 3.056
Bai Rui,Xiao Yong,Yan Weifu,Wang Siqi,Ding Rui,Yang Fan,Li Junpeng,Lu Xiaoquan,Zhao Feng
Naproxen, a widely used nonsteroidal anti-inflammatory drug, has been detected in many environmental matrixes and is regarded as an emerging pollutant. Sulfate radical (SO 4 · - ) -based advanced oxidation processes have attracted wide attention due to their high efficiency and applicability in the removal of emerging contaminants. In this study, CuFe 2 O 4 was used as an efficient catalyst to activate peroxymonosulfate to oxidize naproxen. The results suggested that 92.3% of naproxen was degraded and 50.3% total organic carbon was removed in 60 min in the presence of 0.3 g · L −1 CuFe 2 O 4 and 2 mM peroxymonosulfate. This degradation system showed strong adaptability in a wide pH range from 4.0 to 10.0. Free radical scavenger experiments and electron spin resonance analysis indicated that 1 O 2 , · OH, and SO 4 · - are the main active species. Finally, the potential degradation pathways of naproxen were proposed by detecting and analyzing the degradation products with ultra-high-performance liquid chromatography combined with mass spectrometry. The results of this study suggest that the CuFe 2 O 4 -activated peroxymonosulfate system is a promising technology for the removal of naproxen from natural water.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Yiqing Luo,Jiongliang Yuan,Yuning Su,Lingjia Ma,Zhaotao Liu,Kunye Zhu,Zefeng Feng,Huihua Niu,Shuaishuai Xiao,Qiang Ren,Donglin Song,Xinlu Xiong
The utilization of hydrogen energy is an important way to low carbon economy, and the development of active electrodes is the most critical step for efficient hydrogen evolution reaction. With the addition of KNO 3 as a capping agent, the exposed crystal facet of CuFe 2 O 4 is regulated, and the crystal facet (111) becomes dominant. Compared to CuFe 2 O 4 (3 1 1), CuFe 2 O 4 (111) exhibits low barrier of water dissociation and suitable *H binding strength, resulting in high intrinsic activity. Furthermore, the 3D printed electrodes show more excellent performance. At 3D printed CuFe 2 O 4 (111) electrode, the overpotential is only 152 mV (vs. reversible hydrogen electrode) at 100 mA cm −2 , and Tafel slope is as low as 33 mV dec -1 . In addition, 3D printed CuFe 2 O 4 (111) electrodes shows high stability. The superior performance of 3D printed CuFe 2 O 4 (111) electrodes originates from high intrinsic activity and more exposed active sites. This study provides a new path for the development of efficient, stable and inexpensive monolithic catalyst electrodes for alkaline hydrogen evolution.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
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2025
·Vol. 25
·期 10
·3042
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IF 3.5
Junchao Yang,Liu Yang,Ting Liang,Ling Zhang,Jianan Wei,Shuya Cao,Qibin Huang
HighlightsWhat are the main findings?A 2 mol% Sn2+-doped CuFe2O4sensor was produced for DMMP detection.The sensor demonstrated suitable sensing performance and selectivity toward DMMP.What is the implication of the main finding?The superior response–recovery characteristics and enhanced moisture resistance compared to the undoped sensor are relevant in gas-sensing applications.Sarin poses a serious threat to human health, necessitating the development of an appropriate sensing technology.Sarin is an extremely toxic and fast-acting chemical warfare nerve agent that poses a serious threat to human health, necessitating the development of appropriate sensing technologies. Dimethyl methylphosphonate (DMMP), which has a chemical structure similar to that of sarin but is non-toxic, is often used as a simulation agent in related research. Among promising gas-sensing materials, CuFe2O4exhibits suitable thermal stability. It is easily produced and has low toxicity. Its performance can be enhanced using heterogeneous ion doping to increase the number of surface defects and content of adsorbed oxygen. Therefore, a solvothermal method was adopted in this study to prepare CuFe2O4hollow microspheres that were subsequently doped with different ratios of Sn4+or Sn2+. Detailed characterizations of the obtained materials were conducted, and the corresponding CuFe2O4-based gas sensors were fabricated. Their gas-sensing performance against DMMP was studied to analyze and discuss the gas-sensing and sensitization mechanisms associated with Sn4+and Sn2+doping. The CuFe2O4-based sensor doped with 2 mol% Sn2+exhibited excellent gas-sensing performance in response to a 1 ppm concentration of DMMP, with response and recovery times of 12 and 63 s, respectively. Notably, its response to 1 ppm DMMP (16.27) was 3.3-fold higher than that to 1 ppm 2-CEES (4.98). The doped CuFe2O4sensor exhibited superior response–recovery characteristics and enhanced moisture resistance compared to the undoped sensor.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 47
·58109-58118
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IF 0
Kong Dehui,Wu Jinxiong,Yan Xiuling,Zhang Heng,Iqbal Azhar,Ivanets Andrei,Romanovski Valentin,Zhang Lijuan,Su Xintai
The utilization of electroplating sludge (ES) to derive metal oxide functional materials is a key strategy, as it enables the recycling of valuable elements, mitigates environmental risks, and aligns with green, low-carbon development strategies. Nevertheless, the development of metal oxide composite functional materials with distinctive structures and properties derived from ES continues to present several challenges. Herein, we synthesized CuFe 2 O 4 /MgFe 2 O 4 metal oxide composites from ES by one-step hydrothermal method. As-obtained CuFe 2 O 4 /MgFe 2 O 4 metal oxide composites (MMOs) have a unique layered structure, richer mesoporous and microporous structures, activity sites. When evaluated as an adsorbent for Congo red (CR), as-synthesized CuFe 2 O 4 /MgFe 2 O 4 with layered structure composite exhibited excellent adsorption capacity (1039.1 mg/g) and reusability (85.55% after five cycles), which was superior to most similar adsorbents reported till date. Such improvement is explored to mainly originate from two respects: the physical adsorption facilitated by the abundant pores formed through the stacking and growth of CuFe 2 O 4 and MgFe 2 O 4 , and the chemisorption resulting from surface complexation and hydrogen bonding between the MMOs and CR. This strategy to directly transform ES into functional materials shows great promise both in waste management and preparation of robust adsorbents for wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Xiaoyan Zhang,Chunmei Gan,Kaiwei Huang,Fuying Li,Malin Cui,Kewei Liu,Xiaowan Yu,Da-Peng Yang
Bacterial infection has become the second leading cause of death in the world. Exploring a new highly antibacterial catalyst to replace traditional antibacterial agent is crucial for the society development of human beings. In this study, CuFe 2 O 4 /Lg-based carbon composited catalysts were rationally constructed by facile hydrothermal method. Lignin-derived carbon with enormous oxygen-containing functional group was beneficial to anchor CuFe 2 O 4 nanoparticles. The close contact interface between CuFe 2 O 4 and Lignin-based carbon material was expected to extend the range of optical absorption and promote the separation and transportation of photogenerated carriers. Under NIR (980 nm, 1.5 W/cm 2 ) light irradiation, the as-prepared CuFe 2 O 4 /Lg (20 μg/mL) exhibited excellent photo/photothermal synergetic in vitro (against Escherichia coli and Staphylococcus aureus ) and in vivo (against Staphylococcus aureus -infected mouse wound model) antibacterial performance. Furthermore, the cell count assay kit 8 (CCK-8 kit) demonstrated the good biocompatibility of this material. On the basis of the experimental results, a possible antibacterial mechanism based on the synergetic photothermal and photodynamic therapies was proposed. This work presented a lignin- derived carbon-based highly efficient antibacterial disinfection agent with desirable biosafety.
研究领域:
材料科学
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生物医学工程
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH INNOVATIONS
·
2023
·
IF 0
Xiaofeng Wu,Jianfeng Ma
Using banana peel as raw material, the composite material CuFe2O4@BC was synthesised and used it to activate peracetic acid (PAA) to remove tetracycline (TC) in water. The crystal phase, morphology, and chemical bonding of the composite were analysed by XRD, SEM, FTIR, XPS, and other characterisation techniques. In the degradation experiments, CuFe2O4@BC showed high catalytic activity and found that the best dosage ratio of CuFe2O4@BC and PAA is 300 mg/L: 3 mmol/L, and under this condition, the removal rate of TC in 60 min reached 85%. CuFe2O4@BC showed degradation effect in a wide pH range, and the catalytic activity was found to be the best under acidic conditions. At the same time, after five cycles of test, the composite still maintained more than 80% of TC removal rate. The free radical quenching experiments proved that the main active species in the reaction were •OH, CH3COO• and CH3COOO•.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
ACS Applied Energy Materials
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2023
·
IF 6.4
Yiwang Dong,M. A. K. Yousaf Shah,Muhammad Khalid,Yuzheng Lu,Changhong Deng
Enhancing ionic conductivity and catalytic activity for slow oxygen reduction at lower operating temperatures could revolutionize the widespread adoption of low-temperature ceramic fuel cells (LT-CFCs; 400–550 °C). In this study, we introduce a semiconductor heterostructure composite consisting of a spinelike structure of CuFe2O4 (CFO) and CeO2, which is an efficient electrolyte membrane for solid oxide fuel cells. To improve fuel cell performance at suboptimal temperatures, we developed the CFO-CeO2 heterostructure composite. Our results demonstrate that a button-sized SOFC fueled by H2 and ambient air can deliver 750 mW/cm2 of power at 550 °C, potentially operating down to 400 °C. Furthermore, the CFO-CeO2 heterostructure composite exhibits higher oxygen vacancy and lower activation energy than individual CFO and CeO2 components, facilitating ion transit. Enhanced ionic conduction of the CFO-CeO2 heterostructure composite was thoroughly investigated using various transmission and spectroscopic techniques, including X-ray diffraction (XRD), photoelectron spectroscopy (PS), ultraviolet–visible (UV–vis), and impedance spectroscopy (IS). These findings underscore the effectiveness of the heterostructure approach for LT-SOFCs.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 8
·4474-4480
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IF 1.093
Wang Peng,Dong Tao,Li Meng,Yang Ping
CuO nanoparticles (NPs) were created in situ on the surface of one-dimensional (1D) CuFe2O4 nanotubes (NTs) by controlling the diffusion of precursors via a two-step synthesis. Fiber precursors were firstly prepared by a single spinneret electrospinning
method. A subsequent heat-treatment made the removal of polymers from the precursor fibers. The controlling of molar ratio between Cu and Fe and heating temperature resulted in the morphology change of products. The part of Cu precursors reacted with the Fe precursor to form CuFe2O4
and excess part was diffused to the surface to create CuO NPs. And the density of these NPs could be changed by adjusting the molar ratios of Cu and Fe precursors. CuO NPs were uniformly distributed on the surface of tubular CuFe2O4 fibers using a Cu/Fe molar ratio of
0.65 at 500 °C. Diffusion, nucleation, and growth processes are crucial for the formation and dispersion of CuO NPs. The results of CR adsorption and CO catalytic oxidation indicate that a proper surface structure can play a decisive role in the adsorptive property of the material.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
FERROELECTRICS
·
2023
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IF 0.8
Yingying Chen,Peisong Tang,Xiaoqian Lu,Jia Ma,Huanhuan Li,Haifeng Chen
Using iron nitrate and copper nitrate as raw materials, mesoporous material SBA-15 as template agent and n-hexane as solvent, CuFe2O4 samples of mesoporous loaded composite metal oxide catalysts were successfully prepared by calcination at 600 °C. The samples were characterized by X-ray diffraction (XRD), thermogravimetric-differential scanning analysis (TG-DSC), and scanning electron microscopy (SEM). The selective oxidation of benzyl alcohol by CuFe2O4 under different catalytic conditions was investigated using benzyl alcohol as a model compound, and the oxidation products were analyzed by high performance liquid chromatography (HPLC). The results showed that the CuFe2O4 catalyst prepared by calcination at 600°Cwas the best. The best selective oxidation conditions were achieved at a reaction system temperature of 90 °C, a catalyst dosage of 4 g/L, a molar ratio 1:1 of H2O2 dosage to benzyl alcohol, and a reaction time of 4 h. The conversion of benzyl alcohol under this condition was 66.95%, and the selective conversion of benzaldehyde was 96.07%. This indicates that CuFe2O4 is a composite metal oxide with high selective oxidation of benzyl alcohol and has wide application prospects.
研究领域:
催化化学
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材料科学
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Kun Zhao,Xiaojie Fang,Zhen Huang,Guoqiang Wei,Anqing Zheng,Zengli Zhao
Chemical looping gasification provides a novel technology to enable clean conversion of coal with inherent CO 2 capture. In this study, four types of NiFe 2 O 4 and CuFe 2 O 4 synthesized by sol–gel method and solid-phase method were used as oxygen carriers to promote the H 2 production from gasification of lignite. The effects of the types of oxygen carrier and oxygen carrier to coal (O/C) ratio on chemical looping gasification of lignite were first investigated by a thermogravimetric analyzer (TGA) combing with various analytical methods. The results show that, among four types of oxygen carrier, the NiFe 2 O 4 synthesized by sol–gel method exhibits the highest gasification reactivity with lignite char at an O/C ratio of 1, since its highly cubic spinel structure is beneficial to improve the mobility of lattice oxygen. Furthermore, the operating conditions for chemical looping gasification of lignite were optimized and the gasification performance of four types oxygen carriers was compared by using a fixed bed reactor. It is found that NiFe 2 O 4 synthesized by sol–gel method exhibits the highest total gas yield of 24.47 mol/kg and H 2 /CO ratio of 0.77 during chemical looping gasification of lignite under the optimal operating conditions, ascribed to Fe-Ni synergistic effect which provided higher gasification reactivity with lignite char. The addition of steam drastically improves the total gas yield and H 2 /CO ratio of syngas from 24.47 mol/kg and 0.77 to 64.98 mol/kg and 2.79, suggesting that the H 2 /CO ratio of syngas can be flexibly adjusted to meet the need of downstream process via controlling the amount of steam added. These findings provide an efficient method to obtain H 2 -rich syngas via chemical looping gasification of lignite.
研究领域:
能源科学
·
材料科学
✓ 已验证
DOI
高影响因子
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