COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
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
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Qingxiang Wang,Hezhong Ouyang,Wentao Li,Hexiao Zhang,Aolin He,Ruijiang Liu
The Kirsten Rat Sarcoma Viral Oncogene (KRAS) represents one of the most frequently mutated oncogenes in a variety of malignant tumors, including non-small cell lung cancer (NSCLC), colorectal cancer (CRC), and pancreatic ductal adenocarcinoma (PDAC). Therefore, it is regarded as a pivotal tumor marker, and the detection of it holds immense significance in the realm of tumor prevention, diagnosis, and disease monitoring. In this project, an α-Fe 2 O 3 /Fe 3 O 4 @Au-DNA/BSA probe was progressively constructed to capture KRAS, and the binding probe was immobilized onto the surface of magnetic glass carbon electrodes (MGCE) through magnetic self-assembly for detection purposes. The fabrication process was validated by changes observed in cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) data. Differential pulse voltammetry (DPV) was employed to optimize crucial experimental conditions and analyze biosensor performance. This condition optimization resulted in enhanced sensitivity of the biosensor, leading to improved linearity of data obtained. The limit of detection (LOD) achieved was 1.93 pM, with a limit of quantification (LOQ) at 5.84 pM, and a linear range ranging from 10 pM to 1 μM. Additionally, the stability (the current maintaining stability during the initial eight days), reproducibility (RSD = 2.47 %), selectivity, and real sample analysis (recovery rates ranging from 95.26 % to 109.80 %, RSD ≤ 1.22 %) were found to be favorable. These findings suggest promising prospects for practical applications of this biosensor.
研究领域:
肿瘤学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Qiong Sun,Bing Han,Kaijing Li,Liyan Yu,Lifeng Dong
Photocatalytic fuel cell (PFC) is a novel energy conversion device that can effectively convert light into chemical energy and then electrical energy, accompanied with the pollutant purification treatment by photocatalytic technology. In this study, the synergetic photocatalytic degradation of organic dye in anode and the reduction of heavy metal Cr(VI) in cathode are carried out in an improved dual-chamber PFC device with TiO 2 and core–shell structured Ag@Fe 2 O 3 nanoparticles as photoanode and cathode materials , respectively. Among different materials, Ag@Fe 2 O 3 shows the highest catalytic activity to the reduction of Cr(VI) with an apparent kinetic constant of 0.058 min −1 , even much better than commercial Pt foil (0.027 min −1 ). From morphology and electrical characterizations, the excellent electrical conductivity of noble metal Ag and suitable conduction band positions between TiO 2 and Fe 2 O 3 lead to a rapid and directional transfer of photoinduced electrons, and the variable valence of Fe(II)/(III) in iron oxide facilitates continuous catalytic reduction of Cr(VI) to Cr(III). Moreover, the addition of H 2 O 2 into anode chamber can significantly accelerate the reactions and electricity output. The radical quenching tests prove that the existence of H 2 O 2 can efficiently increase the production of photoinduced carriers, and more oxidizing species (such as O 2 − and OH) can be produced from the reactions between H 2 O 2 and photoinduced holes or electrons.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Nanoscale
·
2018
·Vol. 11
·期 3
·1111-1122
·
IF 7.233
Chunmei Li,Zhihui Chen,Weiyong Yuan,Qing-Hua Xu,Chang Ming Li
Photoelectrochemical (PEC) water splitting represents a promising strategy to convert solar energy into chemical energy in the form of hydrogen, but its performance is severely limited by the sluggish water oxidation reaction. Herein, for the first time, we report the direct assembly of an ultrathin, uniform, and dense layer of Co3O4 on wormlike nanostructured hematite (WN-α-Fe2O3) to form a large-area and high-density WN-α-Fe2O3@Co3O4 core–shell nanoarray via in situ hydrothermal growth followed by calcination, in which the electrostatic force between WN-α-Fe2O3 and the reactants, pH- and temperature-controlled structures of WN-α-Fe2O3, and ultralow nucleation rate of Co3O4 precursors all play critical roles. The obtained heteronanostructure array shows a photocurrent density of 3.48 mA cm−2, which is 4.05 times higher than that of pristine WN-α-Fe2O3 (0.86 mA cm−2), an onset potential of ∼0.62 V, 60 mV lower than that of α-Fe2O3 (∼0.68 V), and a photoconversion efficiency of 0.55%, 3.93 times higher than that of WN-α-Fe2O3 (0.14%). This is among the highest performances reported for Fe2O3-based photoanodes for water splitting. It is discovered that the Co3O4 shells can significantly enhance the charge separation, accelerate the charge transport and transfer, and reduce the charge transfer resistance from the photoelectrode to the electrolyte for a fast water oxidation reaction, thereby greatly promoting the PEC water oxidation performance of pristine WN-α-Fe2O3. This work not only creates a novel low-cost and Earth-abundant WN-α-Fe2O3@Co3O4 photoelectrode with superior PEC water oxidation performance and provides scientific insights into the enhancement mechanism, but also offers a general strategy for the in situ growth of water oxidation catalysts on various photoelectrodes with 3-D complex geometries for PEC water splitting.
研究领域:
材料科学
·
能源转换与存储
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
Chemical Engineering Journal Advances
·
2021
·
IF 0
Kai Wei,Xiufan Liu,Shiyu Cao,Huijuan Cui,Yu Zhang,Zhihui Ai
In this study, we fabricated a micro-nano structured Fe 2 O 3 @FeB composites by treating commercial Fe 2 O 3 with sodium borohydride. The outside amorphous FeB alloy shell endowed the Fe 2 O 3 @FeB with remarkable Fenton-like performance in organic pollutants oxidation by efficient Fe(III)/Fe(II) cycle. For instance, the pseudo first-order rate constants of RhB degradation using Fe 2 O 3 @FeB as Fenton reagent was 74.6 times that of the Fe 2 O 3 counterpart, the hydroxyl radical generation rate of Fe 2 O 3 @FeB was 1-3 orders of magnitude larger than that of other heterogeneous Fenton reagent. Further mechanistic study unveiled that FeB was oxidized accompanying with Fe(0) and B(0) continuously donated electrons to Fe(III) to secure the efficient generation of surface Fe(II), which could generate additional H 2 O 2 by consecutive single-electron molecular oxygen activation (O 2 →•O 2 − →H 2 O 2 ), leading to enhance •OH production and Fenton-degradation toward typical pollutants. This study provides a facile route for efficient heterogeneous Fenton and strengthens the vital role of molecular oxygen activation on Fenton-like process.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Zheng Fang,Wei He,Tao Tu,Niuniu Lv,Chuanhong Qiu,Xin Li,Ning Zhu,Li Wan,Kai Guo
α-Fe 2 O 3 nanoparticles were prepared by using a continuous precipitation method with a valve assisted micromixer in the presence of iron (III) sulfate and ammonia water. The resulting nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM). Meanwhile, CaCO 3 nanoparticles were synthesized in a tube-in-tube flow reactor AF-2400. The acylation process catalyzed by modified lipophilic α-Fe 2 O 3 and CaCO 3 nanoparticles in the flow reactor were systematically investigated. Under the optimal conditions, a yield of 97.8% was obtained. Addition of CaCO 3 nanoparticles resulted in higher catalytic efficiency compared with pure modified α-Fe 2 O 3 nanoparticles. Moreover, this novel acylation also worked well for other substrates.
研究领域:
化学工程
·
材料科学
·
绿色化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Ranran Bu,Ying Deng,Yonglong Wang,Yu Zhao,Qiqi Shi,Qi Zhang,Zhenyu Xiao,Yanyan Li,Wei Sun,Lei Wang
Over the past decades, great achievements of supercapacitor positive electrode materials have been developed, but the exploration of negative electrode materials is obviously lagging and mainly focuses on low-capacity electrochemical double-layer capacitor-based carbon materials (≤300 F g–1, commonly), which limits the overall capacitance of supercapacitor devices for further application. In this work, using the gifted MIL-88A@GO as a precursor, we fabricate a FeS2/Fe2O3 heterostructure-coupled S-functionalized 3D rGO network (FeS2/Fe2O3@S-rGO) by a diffusion-controlled etching and vulcanizing process. The formation of heterogeneous interfaces and the strongly coupled interaction between the FeS2/Fe2O3 heterostructure and 3D S-rGO can provide high surface area for more electrochemical active sites, a rich pathway for the rapid transmission of the electron and electrolyte, and effectively alleviate the volume variation in the charging and discharging process. Therefore, the as-obtained FeS2/Fe2O3@S-rGO presents an outstanding capacity of 219.4 mA h g–1 (790 F g–1) at a current density of 2 A g–1, which is higher than that of most reported Fe-based negative materials. Then, a positive electrode of hierarchical 2D/3D Ni3S2/Co3S4 (NCS) is prepared and further fabricated with a FeS2/Fe2O3@S-rGO electrode to obtain a hybrid supercapacitor device (NCS//FeS2/Fe2O3@S-rGO), which delivers an outstanding overall capacitance value of 114.2 mA h g–1 (274 F g–1) at 1 A g–1 and provides a remarkable energy density of 85.63 Wh kg–1 corresponding to a power density of 0.75 kW kg–1.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Zhong-Shuai Zhu,Jin Qu,Shu-Meng Hao,Shuang Han,Kun-Le Jia,Zhong-Zhen Yu
High activity and long-term stability are particularly important for peroxymonosulfate (PMS)-based degradation processes in wastewater treatment, especially under a flowing state. However, if the highly active nanomaterials are in a powder form, they could disperse well in water but would not be convenient for application under varied flow rates. A metal oxide/bacterial cellulose hybrid membrane fixed in a flowing bed is expected to solve these problems. Herein, α-Fe2O3 nanodisk/bacterial cellulose hybrid membranes as high-performance sulfate-radical-based visible light photocatalysts are synthesized for the first time. The bacterial cellulose with excellent mechanical stability and film-forming feature not only benefits the formation of a stable membrane to avoid the separation and recycling problems but also helps disperse and accommodate α-Fe2O3 nanodisks and thus enhances the visible light absorption performances, leading to an excellent PMS-based visible light degradation efficiency under both stirring and flowing states. Particularly, the optimized hybrid membrane photocatalyzes both cationic and anionic organic dyes under a flowing bed state for at least 84 h with the catalytic efficiency up to 100% and can be easily separated after the reaction, confirming its remarkable catalytic performance and long-term stability. Even under varied flow rates during the continuous process, it efficiently degrades rhodamine B and orange II from 3 to 16 mL h–1. When the flow rate goes back from high to low, the hybrid membrane quickly recovers its original performance, demonstrating the high activity and stability of the α-Fe2O3/bacterial cellulose membrane.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Bo Wang,Cheng Zhang,Bo Huang,Haoguang Wang,Xinrui Miao,Wenli Deng
A facile approach to prepare superhydrophobic fabric with high adhesive ability towards water droplets was developed via a simple dip-coating method. Immersing the cotton fabric (CF) into the γ-Fe 2 O 3 /epoxy resin/lauric acid (FEL) suspension for several minutes, followed by heat curing at 80 °C for 2 h, the superhydrophobic fabric (CF-FEL) was obtained. The quality ratio of γ-Fe 2 O 3 to epoxy resin effect on superhydrophobicity of°F-FEL was discussed. The water contact angle was 156° when 0.15 g γ-Fe 2 O 3 particles were applied. Based on the sticky water adhesion, the CF-FEL could be utilized to realize the transportation of water droplet without mass loss. Meanwhile, due to the capillary force and stagger fibers, the CF-FEL exhibited excellent separation flux and efficiency to separate heavy oil/water mixtures. The mechanical durability of the CF-FEL was also evaluated through tape peeling and rubbing test, which further indicated the feasibility of practical application. Moreover, the CF-FEL showed superior flame retardancy because it inherited the thermal stability property of epoxy resin and γ-Fe 2 O 3 particles. Thus, the prepared CF-FEL is multifunctional and the preparation method is facile and environmentally friendly.
研究领域:
材料科学
·
环境科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Che Han,Yujie Wang,Jintao Liu,Qiangyi Deng,Hongmei Zhang,Shuang Xu,Conglu Zhang
There is growing attention in the removal of microplastics (MPs) from aquatic environment because of their toxicity and difficulty in degradation. Magnetic Fe 3 O 4 is a potential material for MP removal, however, for fabrication of high-efficiency Fe 3 O 4 -based adsorbents, the alkaline synthesis conditions and weak affinity toward MPs must to be addressed. In this study, we developed magnetic α-Fe 2 O 3 /Fe 3 O 4 hybrid adsorbents (MFes) with engineered affinity sites via a facile one-pot synthesis method. During the material formation process, melamine acted as both a nitrogen source for creating N-modified polar adsorption sites and an inducer for formation of α-Fe 2 O 3 /Fe 3 O 4 phase interfaces. The α-Fe 2 O 3 /Fe 3 O 4 phase interfaces provided additional active sites, as evidenced by the enhanced microplastic adsorption performance. The MFe-1.6–100 achieved 92.3 % polystyrene removal at low adsorbent dosage 0.2 g L −1 and showed rapid adsorption kinetics within 25 min, which is superior to most reported values. After five cycles, the removal efficiency could still retain 90 %. Additionally, MFe-1.6–100 exhibited remarkable ion-tolerance for Cl - and NO 3 - . These performances suggest its potential applicability for MPs capture in aquatic environments.
研究领域:
环境科学
·
材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2012
·
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
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2013
·Vol. 1
·期 37
·4845-4854
·
IF 0
Zhi-Gang Wang,Gong Cheng,Yan-Lin Liu,Ji-Lin Zhang,De-Hui Sun,Jia-Zuan Ni
Novel three-dimensional (3D) flowerlike hierarchical γ-Fe2O3@xNH4F·yLuF3 core–shell architectures were synthesized by a simple phase transformation route under mild conditions. The evolution of the flowerlike structure assembled by thin xNH4F·yLuF3 nanosheets has been investigated in detail. We found that an appropriate amount of NH4F and a suitable phase transformation reaction temperature are crucial for the formation of the flowerlike structure, while the calcination treatment is essential to maintain the well-defined core–shell structure. A possible formation mechanism was proposed for the phase transformation reaction and the self-assembly growth in situ. The novel composite material with large open pores, a specific surface area (26.2 m2 g−1), strong reversible magnetic response (Ms = 27.99 emu g−1), and good structural stability has been primarily applied for the selective and effective capture of phosphopeptides and it showed good performance. The obtained products may also have potential applications in areas such as water treatment, purification of biomolecules, and solid catalysis.
研究领域:
材料科学
·
分析化学
·
生物分离
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
危险品化学品经营许可证（带存储）