SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Fujun Ren,Weiwei Zhu,Jingyuan Zhao,Haitao Liu,Xiai Zhang,Hao Zhang,Hao Zhu,Yong Peng,Bo Wang
Antibiotic-like organic pollutants are harmful for aquatic ecosystems and seriously disrupt the ecological balance. Herein, we design a three-dimensional nitrogen-doped graphene oxide aerogel anchored with CoFe 2 O 4 nanoparticles (3D CoFe 2 O 4 /N-rGA) via simple hydrothermal method, which can be used for peroxomonosulfate (PMS) activation toward rapidly and highly efficient degradation of tetracycline (TC). Nitrogen doped into the graphene cellular network can effectively enhance the catalytic activity of the anchored CoFe 2 O 4 by weakening the O-O band, creating new active sites and acting as an excellent electron bridge through synergistic effects. The degradation efficiency of TC is detected to be as high as 85% only within 10 s and the degradation rate can remain above 90% after five cycles under the presence of 3D CoFe 2 O 4 /N-rGA and PMS. The catalyst also has a high efficiency for various antibiotic and pharmaceutical wastewater containing multiple antibiotics degradation.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xin Xiang,Wenxuan Deng,Zhiyi He,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
In recent years, oil spills and the discharge of industrial organic wastewater have not only damaged society and the economy, but also have had a negative impact on the human environment. The composition of oily wastewater is complex and hazardous. It mainly comprises insoluble organic substances and unsaturated aliphatic hydrocarbons. It exists in the form of oil–water mixtures, freely suspended emulsions, and stable emulsions containing surfactants. The shortage of fresh water resources and how to effectively separate oil and water present serious challenges to the scientific community. In this study, we designed a graphene aerogel with magnetic oil-absorbing functionality, which not only has emulsion-breaking functionality, but also can repeatedly adsorb organic pollutants . More importantly, it exhibits a strong Fenton catalytic effect and can effectively degrade pollutants. The aerogel designed in this research integrates adsorption, catalysis and degradation, and exhibits excellent purification of wastewater containing pollutants such as dyes, antibiotics and aromatic hydrocarbons , providing a novel insight into the treatment of oily wastewater.
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
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 43
·14831-14838
·
IF 4.029
Huitao Fan,Xiaojing Xing,Yuhan Yang,Bo Li,Congcong Wang,Dongfang Qiu
Cobalt ferrite nanoparticles loaded on multiwalled carbon nanotube (MWCNT) magnetic hybrids have been demonstrated to be promising magnetic resonance imaging contrast agents and drug carriers. However, the hydrophobic, less biocompatible characteristics and low loading capacity for the drug hamper their wide biological applications. To solve the above problem, an alternative strategy is to coat the MWCNTs@CoFe2O4 nanoparticles with a mesoporous silica (mSiO2) shell. Herein, the reasonable fabrication process results in successful coating mSiO2 on the as-obtained MWCNTs@CoFe2O4 nanoparticles, forming well-defined core–shell-structured MWCNTs@CoFe2O4@mSiO2 nanocomposites. The as-synthesized mesoporous nanocarrier possesses a high surface area and large pore volume for the loading of the drug, and has a superparamagnetic feature for drug targeting. Moreover, the anticancer drug doxorubicin (DOX)-loaded MWCNTs@CoFe2O4@mSiO2 nanoplatforms show an excellent pH-responsive drug release character within 48 h. Therefore, a novel nanocarrier based on MWCNTs@CoFe2O4@mSiO2 was proposed, and its potential application for targeted cancer therapy was highlighted.
研究领域:
生物材料学
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纳米医学
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癌症治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Kun Xu,Zhijia Zhu,Chunyan Hu,Jian Zheng,Huitao Peng,Baojiang Liu
There is currently plenty of emphasis on measures to handle the water pollution spurred on by the misuse of antibiotics. Given its exceptional degradation accomplishment, periodate (PI), a steady solid oxidant, has promising future applications in the breakdown of antibiotics. In this research, PI was activated with UV/CoFe 2 O 4 (CFO) for the first time in an attempt to eliminate oxytetracycline (OTC). The UV/CFO/PI system eliminated 30 mg∙L -1 OTC with a removal effectiveness of almost 100 % in 12 min (OTC 30 mg∙L -1 , CFO 0.2 g∙L -1 , PI 2 mM, pH 5.5). In addition, the ferromagnetism of the CFO assisted to the system's remarkable cycling achievement, with 85.9 % of the OTC still removed after ten cycles. Various organic contaminants, which include reactive blue KN-R (KN-R), ciprofloxacin (CIP), chlortetracycline (CTC), and levofloxacin (LVX), further demonstrated the UV/CFO/PI system to be useful for degrading. The primary active substances for OTC elimination were revealed and recognized through scavenging experiments and EPR analysis as h + , •IO 4 , •IO 3 , 1 O 2 , •OH, and •O 2 – . Simultaneously, redox cycles of Fe(III)/Fe(II) and Co(III)/Co(II) were also observed by XPS test to hasten OTC deterioration. It appeared that this system may be a green approach for antibiotic elimination by investigating the degradation route of OTC and the influence it has on the surroundings employing FuKui functions, LC-MS, and toxicological analysis software (T.E.S.T.), respectively. Additionally, we observed that the CFO (2 2 2) crystal surface has the best adsorption impact on PI by computing Eads from DFT.
研究领域:
环境科学
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化学工程
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材料科学
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毒理学
✓ 已验证
产品关联
DOI
高影响因子
Green Chemical Engineering
·
2021
·
IF 0
Yanlin Zhang,Xinyu Zhang,Guangren Yu,Xiaochun Chen,Ahmed A. Abdeltawab,Hany El-Hamshary
Ionic liquids have been extensively studied as solvents or catalysts for oxidative desulfurization (ODS) of diesel fuel, but it is still a challenge to reduce the desulfurization time and steps. In this work, a new highly efficient desulfurization system composed of CoFe 2 O 4 magnetic nanoparticle, [HMIM]Br-FeCl 3 and H 2 O 2 was developed for the ODS of FCC diesel fuel. The desulfurization performances were investigated including desulfurization time, temperature, volume ratio of IL/oil, O/S molar ratio, dosage of CoFe 2 O 4 , FeCl 3 content in ILs, regeneration, and reuse of catalyst and solvent. Owing to the coupled catalytic roles of CoFe 2 O 4 magnetic nanoparticle and [HMIM]Br-FeCl 3 , where Co 2+ and Fe 3+ interact with H 2 O 2 to produce • OH radical that converts S-compounds into sulfone and sulfoxide compounds, such a desulfurization system is highly effective in removing S-compound in diesel fuel. The S-content in FCC diesel fuel was reduced from the original 272.8 ppm to 0.5 ppm with 99.82% S-removal efficiency after one step within 8 min under the optimal conditions of 25 °C, 8 min, V (IL/oil) = 1:10, O/S = 20, 5 wt% CoFe 2 O 4 dosage and n ([HMIM]Br)/ n (FeCl 3 ) = 1:1; the desulfurization performance is much better in desulfurization time and steps than other desulfurization systems reported previously. The desulfurization system can be regenerated and reused without remarkable loss of desulfurization activity. A desulfurization mechanism was proposed.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ziting Huang,Xiaoqian Zhang,Ze Zhu,Zhenfeng Guo,Xinqiang Wang,Luyi Zhu,Guanghui Zhang,Benxue Liu,Dong Xu
Transition metal-based non-homogeneous materials have excellent activation properties for persulfates (peroxymonosulfate and peroxydisulfate, abbreviated as PMS and PDS). In this study, FeCo-CoFe 2 O 4 (FC-CFO) biphasic fibers were prepared using the electrospinning technique and a stepwise heat-treatment. The prepared fibers possessed magnetic separation properties (Ms = 91.7 emu/g) and achieved a 93.8 % degradation efficiency of norfloxacin (NFX) in 10 min. Quenching experiment, ESR spectrum, and intermediate product revealed that radical •SO 4 − and non-radical 1 O 2 species made major contribution to the FC-CF-500/PMS/NFX system. XPS spectrum and ESR spectrum of oxygen vacancy suggested the abundant oxygen vacancies generated in FC-CFO-500 fibers which could trigger the generation of 1 O 2 . Those findings may demonstrate a reference preparation method of electrospinning nanofibers with an improved PMS activation ability.
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
Micro & Nano Letters
·
2021
·Vol. 16
·期 4
·257-262
·
IF 1.102
Xiao Wang,Mei Wu,Chulei Zhao,Xiaochen Liao,Mengmeng Zhang,Lisha Mei,XiuWen Qiao,Chenglin Hong
Using Ag-CoFe 2 O 4 -GO nanocomposite as biosensor interface, a novel unlabelled electrochemical immunosensor was designed to detect tumour marker carcinoembryonic antigen. Here, Ag-CoFe2O4-GO was synthesized by one-pot method as an immunological probe. They have the following advantages: (1) Silver nanoparticles have a strong redox capacity under applied voltage and good biocompatibility, so they can bind more antibodies; (2) GO has a large specific surface area, which can load more Ag NPs and CoFe 2 O 4 nanoparticles, and has excellent conductivity; (3) CoFe 2 O 4 is widely favoured by researchers due to its advantages such as low production cost and simple preparation process, The prepared Ag-CoFe 2 O 4 -GO nanocomposite can amplify the electrochemical signal; (4) The presence of GO can effectively prevent the agglomeration of Ag NPs nanoparticles and CoFe 2 O 4 nanoparticles, promote the formation of electron transfer network, and contribute to the electron transfer of sensors. Under optimal condition, the current signal and the concentration of carcinoembryonic antigen were linear in the range of 1 pg mL < sp > −1 < /sp > ∼ 80 ng mL < sp > −1 < /sp , > and the detection limit was 0.3 pg mL < sp > −1 < /sp > (S/N = 3). Under certain conditions, the manufactured immunosensor has good reproducibility, selectivity and excellent stability. Thus it has certain clinical value for the detection of carcinoembryonic antigen.
研究领域:
生物医学工程
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分析化学
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纳米技术
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jingwen Niu,Liushan Jiang,Linchun Nie,Jiawei Liao,Lutong Bu,Guangyu Dong,Denghao Song,Guojin Tang,Qingxiang Zhou
Polychlorinated biphenyls (PCBs) have been known pollutants, which are ubiquitous in various matrix, even in some food products and beverages like fruit juices. It is of great importance to develop efficient and simple method to detect them in such matrix. In this work, an effective magnetic composite integrating the advantages of the magnism of CoFe 2 O 4 , hydrophilicity and multisites of Ti 3 C 2 and high adsorption properties of polyaniline (CoFe 2 O 4 @Ti 3 C 2 @PANI) was designed and synthesized. CoFe 2 O 4 @Ti 3 C 2 @PANI-based magnetic solid-phase extraction coupled with gas chromatography-tandem mass spectrometry was established for determination of nine PCBs in fruit juices. The developed method achieved low detection limits of 0.4–0.8 ng L −1 . The established method was validated with three beverages and achieved good spiked recoveries ranging from 77.2 % to 104.7 %. These findings exhibited that the established method was very simple, efficient, and credible for the analysis of PCBs in food, environmental, and other fields.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Dong Sun,Wen Wang,Bing Liang,Jun Xu,Xiaohui Hu,Qun Yang,Xueqin Zuo,Guang Li,Shaowei Jin
The exploitation of high-efficient yet non-precious counter electrode (CE) materials is of great significance for practical applications of dye-sensitized solar cells (DSSCs). Herein, Co 3 Fe 7 alloy anchored on the porous core-shell CoFe 2 O 4 composites (CoFe 2 O 4 /Co 3 Fe 7 ) were successfully manufactured as a counter electrode for DSSC. The detailed electrochemical measurements verified that the introduction of Co 3 Fe 7 alloys modifies the original core-shell structure, contributing to enhance electrical conductivity and promote interfacial electron transfer. While the porous structure increases the potential for exposing active sites and accelerates the diffusion of iodide ions. Moreover, the formation of hetero-junction facilitates the generation of active facet sharing and multi-component synergy, thus prominently boosting the reduction of triiodide and accelerating reaction kinetics. As a consequence, DSSCs structured with CoFe 2 O 4 /Co 3 Fe 7 -modified CEs achieve a satisfactory power conversion efficiency (PCE) of 8.54%, which surpasses that of conventional platinum (7.70%). Meanwhile, the stability of CoFe 2 O 4 /Co 3 Fe 7 CE is also enhanced than noble metals platinum. This work highlights that the heterogeneous CoFe 2 O 4 /Co 3 Fe 7 with a rich interface can effectively stimulate the catalytic activity of reducing triiodide to enhance the performance of the solar cell. This strategy also paves the way for enhancing material activity in the field of energy storage and conversion.
研究领域:
材料科学
·
电化学
·
太阳能
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Wei Xiong,Yuxiang Zhou,Xiaolin Shi,Chaoyi Liang,Wenfang Deng,Lingmei Yuan,Guowen Qian,Cijun Shuai,Zhikui Zeng
The treatment of infective bone defects remains a considerable challenge for orthopedic surgeons, primarily due to the complexities of infection control and the unsatisfactory healing of bone tissue. To solve this challenge, we have designed core/shell nanoparticles to loaded with antibacterial and osteogenic agents. Specifically, magnetocaloric CoFe2O4 (CF) nanoparticles loaded with naringin (NG) and coated with mesoporous silica (MS) were developed to construct NG-CF@MS nanoparticles. Subsequently, levofloxacin (LEV) was loaded into the MS coating, yielding NG-CF@MS-LEV nanoparticles capable of dual drug delivery. These nanoparticles were then incorporated into poly l-lactide (PLLA) powder to fabricate magnetically responsive scaffolds, which demonstrated enhanced osteogenesis and antibacterial activity under alternating magnetic field (AMF) conditions. Drug release studies showed a significant increase in NG and LEV release efficiency in the AMF setting, with a 337% increase in NG release and a 196% increase in LEV compared to non-AMF conditions. In vitro experiments further demonstrated that NG-CF@MS-LEV/PLLA scaffolds exhibited excellent osteogenic and antibacterial properties. Under the intervention of the AMF, the scaffolds displayed antibacterial rates of 98.67% and 99.38% against Escherichia coli and Staphylococcus aureus, respectively. Moreover, the scaffolds significantly promoted osteogenic differentiation and mineralization of mouse bone marrow mesenchymal stromal cells (mBMSCs), highlighting their potential as a promising therapeutic approach for repair of infected bone defects.
研究领域:
生物材料学
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骨科医学
·
药剂学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Nguyen Trung Dung,Le Thuy Duong,Nguyen Thi Hoa,Vu Dinh Thao,Le Viet Ngan,Nguyen Nhat Huy
In this study, cobalt ferrite coated carbon felt (CoFe 2 O 4 /CF) was synthesized by solvothermal method and applied as cathode for electro-Fenton (EF) treatment of tartrazine (TTZ) in water. The materials were characterized by SEM, XRD, FTIR, CV, and EIS to explore their physical, chemical, and electrical properties. The effects of solvothermal temperature and metal content on the TTZ removal were examined, showing that 220 °C with 2 mM of Co and 4 mM of Fe precursors were the best synthesis condition. Various influencing factors such as applied current density, pH, TTZ concentration, and electrolytes were investigated, and the optimal condition was found at 8.33 mA cm −2 , pH 3, 50 mgTTZ L −1 , and 50 mM of Na 2 SO 4 , respectively. By radical quenching test, , 1 O 2 , and HO were recognized as the key reactive oxygen species and the reaction mechanism was proposed for the EF decolorization of TTZ using CoFe 2 O 4 /CF cathode. The reusability and stability test showed that the highly efficient CoFe 2 O 4 /CF cathode is very promising for practical application in wastewater treatment , especially for dyes and other recalcitrant organic compounds to improve its biodegradability .
研究领域:
环境科学
·
水处理
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Chun Wang,Bai-Hang Zhao,Bao-Yu Zhang
A multiphase catalyst (CoFe 2 O 4 @2D-V) was constructed by loading CoFe 2 O 4 on two-dimensional vermiculite surface via hydrothermal synthesis. Levofloxacin (LVX), as a typical antibiotic, was used to estimate the performance of CoFe 2 O 4 @2D-V by PMS activation. CoFe 2 O 4 @2D-V exhibited an excellent adsorption and degradation performance for LVX. Experimental results showed an 88.6 % of LVX removal efficiency and 0.048 min −1 of LVX removal rate obtained in CoFe 2 O 4 @2D-V/PMS system under the conditions of a 15 % CoFe 2 O 4 mass ratio (15 %-CoFe 2 O 4 @2D-V), initial pH 6.89, [LVX] 0 10 mg/L, [Catalyst] 0 0.3 g/L, and [PMS] 0 0.35 mM. Adsorption removal accounted for 35.1 % of LVX removal. The prominent roles of LVX degradation were radical way mainly contributed by •SO 4 - and non-radical way achieved by 1 O 2 . The redox cycle between Co(III)/Co(II) and Fe(III)/Fe(II) played a crucial role in activating PMS to generate reactive oxygen species (ROS). In addition, 15 %-CoFe 2 O 4 @2D-V had less ion leakage, high reusability, and excellent adaptability. Four degradation pathways of LVX in 15 %-CoFe 2 O 4 @2D-V/PMS system were proposed. ECOSAR evaluation show that LVX and its degradation intermediates pose minimal harm to the ecosystem. 15 %-CoFe 2 O 4 @2D-V is an environmentally friendly and efficient catalyst for LVX removal by PMS activation, which may provide a new idea for developing loaded catalysts for antibiotics removal through adsorption and catalysis.
研究领域:
环境科学
·
催化化学
✓ 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）