CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Ning Li,Yu Tian,Jianhui Zhao,Wei Zhan,Jinying Du,Lingchao Kong,Jun Zhang,Wei Zuo
Efficient and selective capture of phosphate from wastewater is critical to inhibit water eutrophication and supplement phosphate sources. Adsorption, as a simple and environmental-friendly approach, can realize phosphate recovery from wastewater. In order to enhance capture efficiency, adsorption capacity and reusability, magnetic 3D Fe 3 O 4 @ZnO nanocubes with uniform active sites were tailor-designed by hydrothermal-atomic layer deposition method for phosphate removal from water under weak magnetic field (WMF). Ultrafast capture of phosphate (94.8% in 5 min) was achieved by Fe 3 O 4 @ZnO composite under WMF due to the improvement of surface area and electrostatic interaction. More importantly, the synergistic effect of Lorentz force and electrostatic attraction promoted the transfer of phosphate anions to Fe 3 O 4 @ZnO surface and pores in one step, breaking the adsorption limitation induced by intraparticle diffusion. Isotherms fitting indicated that multilayer adsorption occurred on Fe 3 O 4 @ZnO surface with superior adsorption capacity of 100.3 mg/g. Moreover, the Fe 3 O 4 @ZnO exhibited excellent selectivity competing with co-existing matters in wastewater. Mechanism exploration found that inner-sphere complexation by ligand-exchange played a major role in the adsorption process. This easily separable and recyclable adsorbent was demonstrated to be a promising candidate for efficient phosphate capture in real sewage. Also, this study provided a novel approach with WMF application in magnetic separable adsorption system for contaminants remediation.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-8
·
IF 5.228
Li Jingshuai,Wang Qi,Guo Zhankui,Ma Hongmin,Zhang Yong,Wang Bing,Bin Du,Wei Qin
The combination of fluorescent nanoparticles and specific molecular probes appears to be a promising strategy for developing fluorescent nanoprobes. In this work, L-cysteine (L-Cys) capped Fe 3 O 4 @ZnO core-shell nanoparticles were synthesized for the highly selective detection of Fe 3+ . The proposed nanoprobe shows excellent fluorescent property and high selectivity for Fe 3+ due to the binding affinity of L-Cys with Fe 3+ . The binding of Fe 3+ to the nanoprobe induces an apparent decrease of the fluorescence. Thus a highly selective fluorescent chemosensor for Fe 3+ was proposed based on Fe 3 O 4 @ZnO nanoprobe. The magnetism of the nanoprobe enables the facile separation of bound Fe 3+ from the sample solution with an external magnetic field, which effectively reduces the interference of matrix. The detection limit was 3 nmol L −1 with a rapid response time of less than 1 min. The proposed method was applied to detect Fe 3+ in both serum and wastewater samples with acceptable performance. All above features indicated that the proposed fluorescent probe as sensing platform held great potential in applications of biological and analytical field.
研究领域:
分析化学
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生物医学工程
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Jingjing Wang,Jinyang Feng,Chuanfu Wei
In the present study, molecularly imprinted polyaniline was immobilized on Fe 3 O 4 /ZnO composite by surface imprinting technique. The obtained molecularly imprinted photocatalyst was used for selective degradation of amoxycillin under visible light irradiation. The presence of Fe 3 O 4 not only endowed the photocatalyst with magnetic separation feature but also enhanced visible light harvesting ability. Compared with Fe 3 O 4 /ZnO composite, photocatalytic performance of the molecularly imprinted photocatalyst was significantly improved because polyaniline could form a heterojunction with ZnO to enhance photocatalytic performance. The molecularly imprinted photocatalyst displayed better photocatalytic efficiency and selective photodegradation activity towards amoxycillin than the non-imprinted photocatalyst, because the photodegradation reaction could take place not only on surface of the photocatalyst but also in imprinted cavities for the molecularly imprinted photocatalyst, while the photodegradation only occurred on surface of the non-imprinted photocatalyst. Active species capture experiments showed that .O 2 - and h + played a crucial role in the degradation of amoxycillin. The current research provided new insight for fabrication of molecularly imprinted photocatalyst with selective degradation ability for organic pollutants.
研究领域:
环境科学
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材料科学
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药学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Jie Tian,Junyan Wei,Yeping Liang,Ruixue Guo,Beibei Li,Ruijuan Qu,Dongmei Zhou,Zunyao Wang,Ping Sun
This study aimed to investigate the catalytic performance of Fe 3 O 4 /ZnO in the ozonation of 1-hexyl-3-methyl imidazolium bromide ([HMIM]Br). The Fe 3 O 4 /ZnO composite was prepared by a quick and convenient two-step coprecipitation method, and the optimum mass ratio of Fe 3 O 4 :ZnO was determined as 1:8. The structure, surface morphology, and chemical composition of the Fe 3 O 4 /ZnO composites were studied by characterization methods. The degradation efficiency of [HMIM]Br reached 96% in 5 min in catalytic ozonation with the Fe 3 O 4 /ZnO composite, an increase of 20% compared with ozonation alone. Moreover, the pseudo-first-order rate constant was 1.5 times higher than ozonation alone. With the increase in the catalyst dosage, the degradation efficiency of [HMIM]Br first improved and then decreased, and the optimum dosage was 0.25 g/L. The increase in pH value and the introduction of Cu 2+ effectively promoted the catalytic ozonation of [HMIM]Br with Fe 3 O 4 /ZnO, while the reducing inorganic ions inhibited the ozonation reaction. Different water matrices had little influence on the catalytic performance of Fe 3 O 4 /ZnO. Radical scavenging and EPR experiments showed that hydroxyl radicals (•OH), superoxide radicals (O 2 •- ) and singlet oxygen ( 1 O 2 ) were the main active species in this system. Meanwhile, product identification showed that the degradation of [HMIM]Br mainly included hydroxylation, imidazole ring cleavage and bond cleavage. Toxicity prediction illustrated that the catalytic ozonation of [HMIM]Br could effectively reduce its toxicity. The efficiency, toxicity, reusability, and stability experiments suggested that the developed catalyst, Fe 3 O 4 /ZnO composite, had promising prospects in catalytic ozonation.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Guoli Xu,Zhi Zhang,Tao Li,Meiling Du,Yueping Guan,Chen Guo
In this study, a sea urchin-like Fe 3 O 4 /ZnO/ZnSe hierarchical heterostructured photocatalyst was successfully prepared via a convenient synthetic strategy and combined with a newly designed photocatalytic magnetically fixed bed reactor (PMFBR) to continuously photodegrade pollutants under simulated solar light irradiation. In the experiment, ZnO nanorods were first grafted onto the surfaces of hollow Fe 3 O 4 nanoparticles, and then ZnSe nanoparticles were uniformly distributed on the ZnO nanorods, the obtained Fe 3 O 4 /ZnO/ZnSe composite exhibited three-dimensional structure and excellent magnetic response. Through citing PMFBR, a stable and homogeneously distributed heterogeneous catalyst, efficient light distribution, and good mass transfer of reactants were achieved. As a result, the Fe 3 O 4 /ZnO/ZnSe composite in the PMFBR showed excellent photocatalytic capacity with a continuous process. The combination of the magnetic photocatalyst and PMFBR transformed the reaction mode from cumbersome intermittent operation to a simple continuous-flow photocatalytic style. It is hoped that this continuous photocatalytic system could provide a new idea for large-scale wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Han Lijuan,Chai Keyi,Du Xinyu,Wang Xiangtong,Zhang Ping,Wang Xiaotian
Tetracycline poses a serious threat to the ecosystems even if the concentration is very low due to its structural stability. In this work, a series of magnetic separable Fe 3 O 4 /ZnO/g-C 3 N 4 composite with excellent degrading tetracycline performance were prepared. And, repeated calcination method was used to strengthen the bonding effect of single component improving the formation of heterojunction. Electrochemical analysis confirmed that the ZnO/g-C 3 N 4 and Fe 3 O 4 /ZnO/g-C 3 N 4 heterojunctions were generated, effectively accelerating the electron separation and transfer in photocatalytic process. The characterization results also showed that ZnO and Fe 3 O 4 nanoparticles are evenly distributed on the surface of g-C 3 N 4 . With the increase of the loading mass concentration of ZnO/g-C 3 N 4 , the degradation rate of tetracycline on Fe 3 O 4 /ZnO/g-C 3 N 4 composite increased and then decreased. The degradation rate of tetracycline on optimal Fe 3 O 4 /ZnO/g-C 3 N 4 composite reached to 94.50% while the TC mineralization rate reached to 61.61% under visible light irradiation for 120 min, exhibiting excellent photocatalytic performance. Due to the effect of Fe 3 O 4 , Fe 3 O 4 /ZnO/g-C 3 N 4 materials exhibited good magnetic property, which is beneficial to separation and recovery of photocatalysts. The reusability experiment showed that the degradation rate of tetracycline was 80.66% after five cycles, displaying good reusability.
研究领域:
材料科学
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环境化学
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光催化
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纳米复合材料
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水处理
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Yuyao Li,Pei Wang,Yifan Liu,Xuefei Wu,Guangning Long,Yi Chen,Jiyan Wang,Fei Tong,Xiaolei Wang
Periodontitis, a chronic inflammatory oral disease resulting from plaque biofilms, affects about 743 million individuals worldwide. However, the efficacy of current treatments is hampered by challenges in delivering antibiotics to recalcitrant oral biofilms and bacterial resistance, thereby impeding successful treatment of infectious diseases. To address the issues, an antibacterial photothermal material was designed, comprising a spherical structure of zinc oxide (ZnO) wrapped with triiron tetraoxide (Fe3O4). The outer layer of the material adsorbed epsilon-polylysine (EPL) by electrostatic action, ultimately leading to the fabrication of Fe3O4/ZnO/EPL nanoparticles (FZE NPs). The Fe3O4 core endowed the nanoparticles with efficient photothermal properties, facilitating the dispersion of dense biofilms, which dramatically promoted the adsorption and penetration of ZnO and EPL into the biofilms to effectively kill bacteria in biofilms in vitro with enhanced sterilization ability. Additionally, upon dissolution in aqueous media, EPL acts as a positively charged antimicrobial peptide that adsorbs onto the surface of negatively charged bacterial membranes, thereby effectively modulating inflammatory responses. In order to ascertain the efficacy of FZE NPs, an investigation was conducted into their antimicrobial effects against the periodontitis-associated pathogen Porphyromonas gingivalis (P. gingivalis) in vitro. Furthermore, the antiperiodontitis potential of FZE NPs was evaluated in Sprague–Dawley (SD) rats of ligamentous periodontitis. In addition, toxicity evaluations indicated that the material had an acceptable biosafety profile in vitro and in vivo. In summary, the nanospheres (FZE NPs) represent a promising therapeutic strategy for the treatment of periodontitis.
研究领域:
材料科学
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口腔医学
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感染性疾病研究
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DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2024
·Vol. 26
·期 5
·1-13
·
IF 2.1
Sun Guohao,Hu Peixin,Lu Hechao,He Qinting,Ren Fang,Wu Juan,Jiang Wei
This study focuses on the synthesis and characterization of recyclable nano-adsorbents of magnetic nanocomposites (Fe 3 O 4 @ZnO-RGO). The Fe 3 O 4 nanoparticles were used as magnetic responders, ZnO coated on the surface of Fe 3 O 4 not only captured Cu 2+ but also prevented the oxidation of Fe 3 O 4 , and reduced graphene oxide (RGO) acted as Fe 3 O 4 @ZnO carrying platform could effectively adsorb Cu 2+ . The physical and chemical performance characterization suggested that the nano-adsorbents had stable structure, good hydrophilicity, and magnetic properties. Furthermore, the research results on adsorption performance indicated that the Fe 3 O 4 @ZnO-RGO had high adsorption properties for Cu 2+ , and the adsorption rate could reach more than 98%. The adsorption process conformed to the Langmuir model and second-order adsorption kinetics, and the adsorption of Cu 2+ was mainly chemisorption, accompanied by physical adsorption. In addition, because of the special magnetic response performance, Fe 3 O 4 @ZnO-RGO could be quickly separated from the solutions for cyclic adsorption so as to avoid secondary pollution. This provided a valuable idea for the effective development of clean and efficient Cu 2+ adsorbents, and the Fe 3 O 4 @ZnO-RGO had great application potential in the field of Cu 2+ wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Zhifeng Ao,Xiongwei Liu,Wenxuan He,Weiyan Wang,Wen Shao,Guojun Deng,Zhigang Shen
The efficient deconstruction and upcycling of polyester waste are critical to the circular plastics economy. Herein, we report a magnetically separable Fe 3 O 4 /ZnO nanocatalyst engineered for efficient polyester depolymerization. Synergistic electronic interactions between Fe 3 O 4 and ZnO modulate surface acidity, maximizing Lewis acidity at an Fe/Zn molar ratio of 1:9. Kinetic and thermodynamic analyses reveal that the depolymerization follows a surface reaction-controlled shrinking-core mechanism, where the enhanced Lewis acidity minimizes Gibbs Free Energy ( ΔG ‡ d ) by lowering activation enthalpy ( ΔH ‡ d ), effectively compensating for the entropic penalty (ΔS ‡ d ) of transition state formation. Under mild conditions (1 atm, 196 ℃, 30 min, 1 wt% catalyst loading), the catalyst delivers 100 % poly(ethylene terephthalate) (PET) conversion and 94 % bis(2-hydroxyethyl) terephthalate (BHET) yield with excellent recyclability. Furthermore, a “one-pot” upcycling strategy is demonstrated where the unpurified depolymerization mixture serves directly as a chain extender for the synthesis of high-value waterborne alkyd resins. This protocol, characterized by near-100 % atom economy and the elimination of costly separation steps, offers a sustainable route for industrial polyester valorization.
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DOI
高影响因子
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
·
2021
·Vol. 94
·期 8
·1066-1071
·
IF 0.85
Vorobyova E. V.
Abstract The effect of fillers, metal oxide nanoparticles (Fe 3 O 4 , ZnO), on the thermal oxidation resistance of polyethylene inhibited by the phenolic antioxidant Irganox 1010 was studied. The distribution of nanoparticles in the polymer matrix was carried out by ultrasound, and the samples were formed by thermal pressing. Thermal oxidation resistance was determined by the duration of the induction oxidation period of film samples. It is shown that the pressure of the press during the formation of the material has a significant effect on the thermal oxidation resistance of the inhibited composite, both filled with nanoparticles of Fe 3 O 4 , ZnO, and unfilled. The nature of the effect of the concentration of the nanofiller on the thermal oxidation resistance of the samples depends on the metal oxide used. An increase in the concentration of the filler Fe 3 O 4 leads to a decrease in the thermal oxidation resistance of the polymer; when using ZnO, this dependence is inverse. The oxidation of the prepared nanocomposite film samples formed under high pressure conditions revealed synergistic effects of nanofillers and antioxidants.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Huashuai Wang,Can Hao,Lingyun Chen,Dunyi Liu
Cadmium (Cd) pollution poses a significant threat to food safety and human health. Foliar spraying of nanomaterials has been widely used to mitigate Cd stress in agriculture. However, the effects and synergistic mechanisms of various nanomaterial combinations on Cd resistance remain unclear. This study compared the impacts of Fe 3 O 4 nanoparticles (NPs), ZnO NPs, and their combinations at different concentrations (50–400 mg/L) on the growth and physiology of peanuts under Cd-stress. Results showed that combined-NPs reduced Cd accumulation and enhanced plant growth more effectively than single-NPs. Specifically, the concentrations of Cd in roots and shoots were reduced by 52.13 % and 47.83 %, respectively, while biomass increased by 42.86 % for roots and 100.17 % for shoots. A concentration of 150 mg/L of combined NPs was optimal, reducing root Cd concentration from 0.619 mg/g to 0.245 mg/g and shoot from 0.187 mg/g to 0.148 mg/g. Transcriptomic analysis revealed that combined NPs upregulated oxidative stress-related genes ( GST23 , POD2 ) to strengthen antioxidant defenses. Simultaneously, they also downregulated metal transports ( ABCC2 , Nramp2 , ABCG29 , ABCG2 ), potentially limiting Cd uptake. These findings reveal the synergistic mechanism of enhancing antioxidant systems and regulating metal transport pathways, offering a new strategy to develop combined nano-fertilizers that combat Cd pollution in similar crops.
研究领域:
植物生理学
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环境科学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Xiaoyuan Zhang,Jianning Wu,Guihua Meng,Xuhong Guo,Chang Liu,Zhiyong Liu
For the first time, novel multifunctional superparamagnetic PANI–Fe 3 O 4 @ZnO core–shell composite photocatalysts with different PANI: ZnO ratios were synthesized by Pickering emulsion route in one step in the presence of ZnO nanoparticles. PANI–Fe 3 O 4 @ZnO core–shell microspheres consist of PANI core which embedded with Fe 3 O 4 -OA (oleic acid modified Fe 3 O 4 ) nanoparticles and tunable ZnO shell thickness. The resulting samples were thoroughly studied by using X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), transmission electron microscopy (TEM), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). The catalytic activity of the as-prepared PANI–Fe 3 O 4 @ZnO core–shell microspheres is investigated by the degradation of MB under visible light irradiation. As expected, the as prepared PANI–Fe 3 O 4 @ZnO photocatalysts exhibit highly enhanced photocatalytic activities in the degradation of MB under visible light irradiation owing to fast separation of photo-generated electron-hole pairs. Significantly, the PANI–Fe 3 O 4 @ZnO catalysts can be separated from the reaction media by applying an external magnet, and can be reused for seven cycles without change in stability and degradation efficiency.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）