CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Zhenzhong Hu,Hongwei Gao,Guoqing Yang,Jingxia Ning,Honghong Lyu,Sheng-qi Guo,Mengmeng Zhen,Jiawei Zhang,Boxiong Shen
Fenton technology is effective in removing high-risk roxarsone (ROX) from the environment. In this study, MoS 2 -modified magnetic iron oxides were successfully synthesized to serve as catalysts for the photo-Fenton system to efficiently degrade ROX. Under light illumination, these catalysts demonstrated strong arsenic adsorption characteristics and photocatalytic activity. The catalyst 6Mo-Fe achieved a 96.15% removal of 20 mg/L ROX and an 88.95% removal of total arsenic within 120 minutes. The study evaluated the effects of catalyst dosage, H 2 O 2 dosage, initial pH, and common anions on the degradation efficiency. The integration of MoS 2 significantly improved the forbidden band width, light absorption capacity, and electrochemical impedance of iron oxides, facilitating the separation and transfer of charge carriers. MoS 2 provided abundant Mo 4+ reduction sites for Fe 3+ , which, in conjunction with the photocatalytic reaction, promoted the cyclic conversion between Fe 3+ and Fe 2+ , thereby markedly increasing the reaction rate. This study presents an innovative approach using MoS 2 -modified iron oxides for the sustainable and eco-friendly degradation of organoarsenic compounds.
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
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
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
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IF 4.9
Longxin Wang,Yishan Wang,Dongdong Liu,Xuji Zhang,Guangwu Wen,Xueqian Zhang,Xiaoxiao Huang
In order to improve the weak dielectric loss capability and poor impedance matching of Fe 3 O 4 , the hexagonal plates of Fe 3 O 4 /Fe 2 O 3 /C nanocomposites were rationally constructed in this paper by utilizing electrostatic attraction and cross-linking, using polyacrylamide (PAM) as templating agent and viscosity modifier. The stacked hexagonal plates constructed a conductive network and utilized the structural properties of Fe 3 O 4 to promote the transfer and jump of free electrons, which effectively improved the conduction loss. The heterogeneous interface was effectively constructed due to the presence of Fe 2 O 3 and trace carbon, while the transfer and leap of free electrons promoted the generation of interfacial polarization, resulting in magnetoelectric coupling and effective improvement of polarization loss. The results show that the effective absorption broadband reaches 4.08 GHz when the matching thickness of the composite is 2 mm. A minimum reflection loss of −43.79 dB is realized at a matching thickness of 1 mm. The PAM modification proved to be an effective means to modulate the morphology and composition of the materials.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2012
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IF 5.625
Hongying Zhao,Yujing Wang,Yanbin Wang,Tongcheng Cao,Guohua Zhao
A novel electro-Fenton (E-Fenton) system with the Fe 3 O 4 @Fe 2 O 3 /activated carbon aerogel (ACA) composite cathode was firstly constructed in this study. Its application on degrading imidacloprid exhibited highly catalytic efficiency over a wide applicable pH range from 3 to 9. The removal of imidacloprid and TOC achieved to 90% within 30 and 60 min, respectively. The nature of composite cathode was examined by BJH, XRD, SEM, TEM, XPS and FTIR techniques. ACA with high surface area of 2410 m 2 g −1 and multiplicated porosities composed of micropores and mesopores worked not only as cathode but also as Fenton catalyst support, enhancing oxidation activity. We proposed reasonable E-Fenton oxidation mechanisms with Fe 3 O 4 @Fe 2 O 3 /ACA cathode at acidic and basic conditions. At pH 3, it followed a Haber–Weiss mechanism that the dissolved iron ions and surface Fe(II) sites catalyzed the decomposition of H 2 O 2 to generate hydroxyl radicals ( OH). While at pH 9, it was expected the formation and deactivation of H 2 O 2 complex as well as the catalytic decomposition of H 2 O 2 with surface Fe(III) and Fe(II) sites to produce both superoxide anion ( O 2 − /HO 2 ) and hydroxyl radicals ( OH), involving an in situ recycling of iron oxide (FeO·Fe 2 O 3 → Fe 2 O 3 ).
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 5
·2764-2774
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IF 11.301
Yali Wang,Ruihui Gan,Hao Liu,Mahmut Dirican,Chengbiao Wei,Chang Ma,Jingli Shi,Xiangwu Zhang
The advancement of electrocatalysts using non-precious metals with excellent catalytic ability and durability for the oxygen reduction reaction (ORR) remains an enormous challenge. Transition metal–nitrogen–carbon (M–N–C) materials become target products with great development and application prospects for the ORR in new electrochemical energy storage and conversion devices. Herein, a simple preparation procedure of N-doped hierarchically porous carbon nanospheres loaded with Fe3O4/Fe2O3/Fe nanoparticles (Fe–CNSs–N) is developed by direct annealing of an Fe-doped quinone-amine polymer in an NH3/Ar atmosphere. Due to the integration of large specific surface area, hierarchically porous structure, and Fe3O4/Fe2O3/Fe nanoparticles, Fe–CNSs–N presents a half-wave potential of 0.835 V vs. RHE, which is 7 mV more positive than that of a commercial Pt/C catalyst in an alkaline medium. It also exhibits outstanding long-cycle durability as well as methanol endurance, superior to the Pt/C catalyst. Compared to the zinc–air battery based on Pt/C, the Fe–CNSs–N-based battery presents a higher open-circuit potential of 1.54 V, steadier discharge–charge cycle performance and an outstanding maximum power density of 106.8 mW cm−2. The excellent electrocatalytic performances make Fe–CNSs–N a promising substitute for Pt/C noble-metal catalysts in rechargeable Zn–air batteries.
研究领域:
材料科学
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能源化学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yanling Zhang,Min Liu,Shuai Pan,Lulu Yu,Shaoshuai Zhang,Ruijiang Liu
Based on magnetic Fe 3 O 4 /Fe 2 O 3 @Au nanoparticles (Fe 3 O 4 /Fe 2 O 3 @Au NPs), to detect an important tumor screening marker, vascular endothelial growth factor 165 (VEGF 165 ), a label-free electrochemical aptasensor was constructed. Magnetic glassy carbon electrode (MGCE) after Fe 3 O 4 /Fe 2 O 3 @Au NPs surface modification by a magnetic-induced self-assembly technique was the platform. Fe 3 O 4 /Fe 2 O 3 @Au NPs were used as the signal amplifier to enhance electron transfer, which was essential for the detection of trace amounts of biological analytes, and were prepared via heating hydrolyzation-combustion calcination and trisodium citrate reduction. Meanwhile, aptamers bound to the as-prepared nanomaterial via Au-s bonds and specifically recognized VEGF 165. The electrochemical properties of the aptasensor were evaluated with [Fe(CN) 6 ] 3−/4 − as redox probes. When in optimal detection conditions, an excellent linear relationship (between 0.01 and 10 pg mL −1 , R 2 = 0.9973) was obtained for the electrochemical aptasensor. The limit of detection (LOD) and the limit of quantitation (LOQ) of the electrode were 0.01 and 0.03 pg mL −1 . This proposed aptasensor exhibited favourable selectivity, stability, reproducibility, and regenerability. The results demonstrated that the sensor was promising to provide an efficient, accurate, and low-cost auxiliary detection method for the early screening of VEGF 165 -related diseases, which had important clinical practical value for the research of human precision medicine.
研究领域:
分析化学
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生物传感器
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纳米技术
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癌症研究
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电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ruijiang Liu,Shuai Pan,Min Liu,Wei Huang,Zhixiang Lv,Aolin He
A label-free electrochemical biosensor with magnetically induced self-assembly based on peptide nucleic acids (PNA) and Fe 3 O 4 /Fe 2 O 3 heteroplasmon nanorods was successfully fabricated to detect the single nucleotide polymorphism (SNP) of CYP2C9*3. The sensitivity of the electrochemical biosensor was improved by introducing PNA and Fe 3 O 4 /Fe 2 O 3 @Au nanocomposites. The Fe 3 O 4 /Fe 2 O 3 @Au nanocomposites were assembled on the surface of the magnetic glassy carbon electrode (MGCE) by magnetic field, and the thiolated PNA were connected to the nanocomposites through Au-S bonds. The biosensor exhibited a good linear correlation between 1 pM and 1 µM (R 2 = 0.9941), and the limit of detection (LOD) and the limit of quantitation (LOQ) were 0.95 pM and 3.18 pM, respectively. Besides, the electrochemical biosensor could recognize single-base mismatch DNA, and it could be stored stably for 15 days at 4 °C.
研究领域:
生物传感器
·
电化学
·
分子诊断
·
纳米技术
·
遗传学
✓ 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）