Environmental Science-Nano
·
2017
·Vol. 4
·期 11
·2134-2143
·
IF 6.047
Chen Tian,Jian Zhao,Jing Zhang,Shengqi Chu,Zhi Dang,Zhang Lin,Baoshan Xing
Roxarsone (ROX) is an emerging arsenic pollutant due to its potential degradation into highly toxic inorganic arsenic species in the environment. Adsorbents which can capture ROX with both high capacity and affinity are urgently needed. Herein, a nanocomposite of nano-Fe3O4 and three-dimensional graphene (Fe3O4@RGO) was designed, aiming to simultaneously attract arsenate and benzene groups in ROX. Characterization of the nanocomposite revealed that Fe3O4 nanoparticles (20–50 nm) with exposed (400) planes were highly dispersed on the graphene support. Adsorption experiments showed that Fe3O4@RGO had higher adsorption capacity, affinity, and adsorption rate towards ROX than pristine materials and efficiently removed ROX from both simulated natural and waste waters. The adsorption mechanism was confirmed as a synergetic interaction of As–Fe coordination, hydrogen bonding and π–π interaction. X-ray photoelectron spectroscopy (XPS) and extended X-ray absorption fine structure (EXAFS) results suggested that the As–Fe complexes and hydrogen bonds between Fe3O4@RGO and ROX were stronger than those in pristine nano-Fe3O4, due to the greater number of surface hydroxyls and shorter As–Fe atomic distance in Fe3O4@RGO. The π–π interaction between ROX and the graphene part in Fe3O4@RGO was also enhanced. This study provided a novel idea for designing materials to remove pollutants with both inorganic and organic moieties, such as phenylarsonic acid compounds, from water.
研究领域:
环境科学
·
材料化学
·
水污染控制
·
纳米技术
·
分析化学
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2015
·
IF 2.489
Ling Li,Ya Q. Wu,Ke K. Sun,Run Zhang,Lu Fan,Ke K. Liang,Le B. Mao
By exploring the layer-by-layer self-assembly method and the changes of content of graphene oxide (GO), controllable preparation of a new core–shell microsphere Fe 3 O 4 @MOFs/GO was achieved in this work. The prepared composite material was characterized by the XRD , FTIR, and TEM analysis. The application of Fe 3 O 4 @MOFs/GO as drug carrier for ibuprofen was studied. The results suggested that the properties of drug loading and release can be tuned by different layers and content of GO.
研究领域:
材料科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2018
·
IF 4.514
Peijiang Liu,Zhengjun Yao,Vincent Ming Hong Ng,Jintang Zhou,Ling Bing Kong,Kan Yue
Although two dimensional (2D) materials have already been studied as promising microwave absorption materials due to fascinating layered structure, it is hard to achieve both thin coating and excellent absorbing capability. Herein, 2D hierarchical composites of nano-sized Fe 3 O 4 particles on MXenes (TiO 2 /Ti 3 C 2 T x /Fe 3 O 4 ) with different [TiO 2 /Ti 3 C 2 T x ]/[Fe 3 O 4 ] ratios were synthesized by using a moderate chemical hydrothermal reaction. Scanning electron microscope and transmission electron microscope techniques indicated that the surfaces of MXenes were densely covered with Fe 3 O 4 nanoparticles of ∼4.9 nm in diameter and TiO 2 particles. By tuning the ratio of [TiO 2 /Ti 3 C 2 T x ]/[Fe 3 O 4 ], microwave absorption capabilities in terms of the maximum reflection loss ( R L ) value and absorber thickness could be readily optimized. Specifically, the sample TiO 2 /Ti 3 C 2 T x /Fe 3 O 4 -5 exhibited a remarkable absorption performance, with a maximum reflectivity of −57.3 dB at 10.1 GHz and a band range below −10 dB to over 9.1–11.1 GHz at a thickness of 1.9 mm. Therefore, our 2D MXene composites are expected to be promising candidates as ultrathin and lightweight absorbing materials.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
FOOD CONTROL
·
2024
·
IF 5.6
Xia Xu,Xin Liu,Yixing Qiu,Yufan Song,Xuxia Zhou,Yuting Ding
The accurate determination of histamine in fish is imperative for food safety, given the toxic nature of this biogenic amine . This study presents an innovative colorimetric aptasensor for the ultrasensitive detection of histamine in fish, utilizing nanozymes based on magnetic metal-organic frameworks coated with Pt nanoparticles (Fe 3 O 4 @MOF@Pt), which exhibit high peroxidase-like catalytic activity, magnetism, and superior optical properties. The surface of Fe 3 O 4 @MOF@Pt nanozymes were modified with DNA strands complementary to the histamine aptamer , creating effective colorimetric probes. In the presence of histamine, these colorimetric probes compete with histamine molecules for aptamer binding on the enzyme plate. Color development is triggered by adding a TMB and H 2 O 2 substrate solution to the enzyme plate. This competitive binding-based aptasensor allows for rapid and accurate histamine quantification within a linear range of 10 pM to 10 μM, and a notable detection limit of 6.23 pM. Furthermore, the sensor demonstrated excellent specificity, distinguishing histamine from l -histidine and other biogenic amines. Tested on mackerel samples, the aptasensor showed spiked recoveries of 91.4%–109.6%, validating its practical applicability. This sensor offers an ultrasensitive, specific, and reusable tool for histamine detection, representing a significant advancement in ensuring the safety of fish products.
研究领域:
食品安全
·
生物传感
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2015
·
IF 1.173
Ling Li,Li Jun Yuan,Wei Hong,Lu Fan,Le Bao Mao,Li Liu
The adsorptions of methylene blue (MB) and methyl violet (MV) from an aqueous solution of Fe3O4/metal-organic frameworks (MOFs) composite were studied in view of the adsorption isotherm, kinetics and regenerate of the sorbent. The adsorption isotherms of MB and MV on Fe3O4/MOFs composite both followed the Langmuir isotherm. Adsorption kinetics were determined from the experimental data. The used Fe3O4/MOFs could be regenerated by acetonitrile, so it can be recycled for use. The excellent adsorption effect and reusability make Fe3O4/MOFs attractive for the removal of MB and MV from aqueous solution. The feasibility of Fe3O4/MOFs for application in magnetic solid-phase extraction was examined.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
PLoS One
·
2014
·Vol. 9
·期 6
·e100704
·
IF 3.534
Shams Ali Baig,TianTian Sheng,Chen Sun,XiaoQin Xue,LiSha Tan,XinHua Xu
The presence of elevated concentration of arsenic in water sources is considered to be health hazard globally. Calcination process is known to change the surface efficacy of the adsorbent. In current study, five adsorbent composites: uncalcined and calcined Fe 3 O 4 -HBC prepared at different temperatures (400°C and 1000°C) and environment (air and nitrogen) were investigated for the adsorptive removal of As(V) and As(III) from aqueous solutions determining the influence of solution's pH, contact time, temperature, arsenic concentration and phosphate anions. Characterizations from FTIR, XRD, HT-XRD, BET and SEM analyses revealed that the Fe 3 O 4 -HBC composite at higher calcination temperature under nitrogen formed a new product (fayalite, Fe 2 SiO 4 ) via phase transformation. In aqueous medium, ligand exchange between arsenic and the effective sorbent site ( = FeOOH) was established from the release of hydroxyl group. Langmuir model suggested data of the five adsorbent composites follow the order: Fe 3 O 4 -HBC-1000°C(N 2 )>Fe 3 O 4 -HBC (uncalcined)>Fe 3 O 4 -HBC-400°C(N 2 )>Fe 3 O 4 -HBC-400°C(air)>Fe 3 O 4 -HBC-1000°C(air) and the maximum As(V) and As(III) adsorption capacities were found to be about 3.35 mg g −1 and 3.07 mg g −1 , respectively. The adsorption of As(V) and As(III) remained stable in a wider pH range (4–10) using Fe 3 O 4 -HBC-1000°C(N 2 ). Additionally, adsorption data fitted well in pseudo-second-order ( R 2 >0.99) rather than pseudo-first-order kinetics model. The adsorption of As(V) and As(III) onto adsorbent composites increase with increase in temperatures indicating that it is an endothermic process. Phosphate concentration (0.0l mM or higher) strongly inhibited As(V) and As(III) removal through the mechanism of competitive adsorption. This study suggests that the selective calcination process could be useful to improve the adsorbent efficiency for enhanced arsenic removal from contaminated water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2021
·Vol. 35
·期 6
·1021-1030
·
IF 0.957
Wei Junchong,Long Xuejun,Wang Jia,Tang Zheng,Wang Tingting,Kang Hanyu,Liang Shuang
Artificial zeolite was modified by nano-Fe 3 O 4 for development of functional adsorbents. Subsequently, adsorbents such as calcium cross-linked nano-Fe 3 O 4 microspheres (Ca-MS), calcium cross-linked nano-Fe 3 O 4 modified zeolite microspheres (Ca-MZS) and iron cross-linked nano-Fe 3 O 4 modified zeolite microspheres (Fe-MZS) were prepared and compared for their adsorption performance. The effects of adsorbent dosage, solution pH, initial concentration and ion content on the removal of Cu 2+ from wastewater are investigated, and the adsorption kinetics and isotherms for the adsorbent materials were analyzed. The experimental results indicate that for the initial concentration of Cu 2+ of 30 mg/L, the adsorption is noted to be most stable. The optimal initial pH for adsorbing Cu 2+ is observed to be 5.5. At an optimal dosage of Ca-MZS of 900 mg/L, the adsorption capacity is measured to be 28.25 mg/g, along with the removal rate of 72.49%. The addition of Na + and K + affects the adsorption of Cu 2+ . For the Na + and K + concentration of 0.2 mmol/L, the Cu 2+ removal rate by Ca-MZS drops to 11.94% and 22.12%, respectively. As compared with the adsorbents such as Natural Zeolite (NZ), Ca-MS and Fe-MZS, Ca-MZS demonstrates the best removal effect in solution, where the removal rate reaches 84.27%, with the maximum adsorption capacity of 28.09 mg/g. The Cu 2+ adsorption kinetics of Ca-MZS is observed to follow the Elovich kinetic model, with the adsorption isotherm data fitting the Freundlich isotherm model by using the non-linear method.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Ruixiong Huang,Zhanqiang Fang,Xiaomin Yan,Wen Cheng
In this study, the Fe 3 O 4 magnetic nanoparticles (MNPs) were synthesized as heterogeneous catalysts to effectively degrade bisphenol A (BPA). The properties of the synthesized catalysts were characterized by Brunnaer–Emmett–Teller (BET), X-ray powder diffraction (XRD), X-ray photoelectron spectrometry (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. The results indicated that the Fe 3 O 4 MNPs appeared to be roughly spherical shapes and their average size was 10–20 nm. The catalytic capacity of MNPs in US + Fe 3 O 4 + H 2 O 2 system with different pH conditions, H 2 O 2 concentrations and MNPs doses was investigated. It was found that the OH radicals were promptly generated due to the catalysis of the Fe 3 O 4 MNPs. BPA could be degraded within a wide pH range from 3 to 9, and the degradation efficiencies were remarkably enhanced by ultrasound. The apparent rate constants were 8.31 × 10 −3 , 7.96 × 10 −3 and 5.64 × 10 −3 min −1 , respectively, when the pH values were 3, 7 and 9, respectively. The removal efficiencies of BPA were all over 95%. About half total organic carbon (TOC) in solution was eliminated under neutral condition by sono-Fenton process. Furthermore, the results of stability and reusability demonstrated that the Fe 3 O 4 MNPS were promising in the treatment of wastewater with refractory organics.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 29
·期 5
·1399-1410
·
IF 2.523
Zhang Xin,Chen Fei,Li Yuejin,Duan Yongzheng,Liu Guoxia
In this study, lanthanum-modified the shell–core magnetic nanocomposites with Fe 3 O 4 core and homogeneous mesoporous silica shell (La-SBA-15@Fe 3 O 4 -x) were prepared. The preparation, morphology, composition and magnetic properties of La-SBA-15@Fe 3 O 4 were investigated by TEM, SEM, XRD, VSM and BET. The results suggested that the SBA-15 have successfully encapsulated Fe 3 O 4 and the magnetic particles were decorated by lanthanum. The adsorption experiments were carried out to explore effect of La-SBA-15@Fe 3 O 4 on removal of phosphorus from aqueous solution. The kinetic study of adsorption process was investigated to describe the relationship between adsorption rate and adsorption equilibrium and the Langmuir and Freundlich isotherm models were employed to illustrate adsorption isotherm.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2020
·
IF 8.208
Yanwei Hu,Lei Shi,Zhenduo Zhang,Yurong He,Jiaqi Zhu
The addition of external force provides an alternative way to promote the application of phase change materials in thermal-energy storage, space heating, and cooling systems. However, the experimental investigation using external magnetic force to regulate the phase change process is still limited. Here, magnetic Fe 3 O 4 nanoparticles were added to paraffin wax to form phase change nanocomposites with enhanced thermal properties and controllable magnetism. The thermal properties of nanocomposites were measured and the phase change processes under magnetic controlling were experimentally and numerically investigated. A two-dimensional enthalpy-based lattice Boltzmann model with considering the external magnetic force was proposed and the measured thermal properties were used in the simulation. Good agreement between the experiment and simulation was achieved. The effects of different mass fractions of Fe 3 O 4 nanoparticles (0, 1, 2, 3 and 4 wt%), magnetic directions, magnetic field intensities (0, 20, 40, 60 mT) on the phase change characteristics are discussed. The heat transfer efficiency in a square cavity filled with the nanocomposites developed more quickly when the paraffin wax was doped with a higher Fe 3 O 4 mass fraction. Moreover, the phase change characteristics were controlled by the intensity and direction of the magnetic field. This study presents a method to achieve magnetically regulating phase change heat transfer characteristics that have potential applications in the energy-storage industry.
研究领域:
能源存储
·
热传递
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Xiaohuan Liu,Wenwu Cheng,Yangmi Yu,Shengtao Jiang,Yuzhi Xu,Enmin Zong
A novel adsorbent of ZrO 2 /PEI/Fe 3 O 4 functionalized MWCNTs composite (MWCNTs@Fe 3 O 4 @PEI-Zr) possessing a high affinity to phosphate and easily separated from aqueous solution was proposed in this work. The ZrO 2 and PEI modified on the surface act as active sites for the removal of phosphate, while the Fe 3 O 4 allows for the easy separation by applying an external magnetic field . Compared to traditional separation like centrifugation, magnetic separation markedly reduces energy consumption and provides more possibilities for application. The composite exhibits a relatively high surface area of 162.9 m 2 g -1 with a larger number of mesopores. As-prepared MWCNTs@Fe 3 O 4 @PEI-Zr is found to have a relatively high phosphate adsorption capacity of 21.14 mg P g −1 and it can be recovered rapidly from water under an external magnetic field . Moreover, MWCNTs@Fe 3 O 4 @PEI-Zr exhibits an outstanding anti-interference capability in terms of the coexisting ion and ionic strength of solutions. Importantly, the dissolution of Zr and Fe are negligible (less than 0.015 mg L −1 ) over a wide pH range of 4.04–9.98, indicating that the MWCNTs@Fe 3 O 4 @PEI-Zr is a structurally stable hybrid composite particle with strong interaction. Furthermore, it shows a good reusability and 86.2% removal efficiency of phosphate remains after three consecutive cycles. Both the ligand exchange and the electrostatic attraction are mainly responsible for phosphate removal by MWCNTs@Fe 3 O 4 @PEI-Zr. This work demonstrated that the highly efficient, easy separable, high stability and reusability MWCNTs@Fe 3 O 4 @PEI-Zr composite has the potential for phosphate removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Longxin Wang,Yishan Wang,Dongdong Liu,Yao Wang,Xuji Zhang,Guangwu Wen,Xueqian Zhang,Xiaoxiao Huang
The application of heterostructures and complex morphology has been favored by researchers of electromagnetic wave-absorbing materials. Herein, Fe3O4/Fe2O3/C composites with carbon-coated octahedral structures were prepared and obtained using a polymer self-assembly-guided nonhomogeneous structure engineering strategy to form hierarchical polyhedral structures (200–400 nm in size). The electrostatic attraction of anionic polyacrylamide (APAM) is used to chelate Fe3+. Due to the synergistic effect of intermolecular forces, APAM can be used as a “bridge” to connect multiple micellar particles, and this bridging and entanglement effect facilitates the formation of octahedral Fe3O4/Fe2O3. Compared with nanoparticles, the octahedral structure easily forms a conductive network, and the presence of sharp corners can effectively promote the concentration of charge, promote polarization loss, and extend the reflection and scattering path. Through the high-temperature reduction of APAM, the conversion of part of Fe2O3 to Fe3O4 is realized, which effectively improves the electromagnetic parameters and thus optimizes the impedance matching. Meanwhile, the synergistic effect between the magnetic loss (ferromagnetic resonance) of Fe3O4 and the dielectric loss (interfacial polarization, dipole polarization, and conduction loss) of Fe3O4/Fe2O3/C enhances the absorption of electromagnetic waves. Unsurprisingly, the synthesized Fe3O4/Fe2O3/C composites exhibit excellent EMW absorption performance, with a reflection loss of up to −34.7 dB at 30% paraffin filler ratio and an effective absorption bandwidth (EAB) of 8.64 GHz at 1–3 mm.
研究领域:
材料科学
·
电磁学
✓ 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）