SENSORS
·
2024
·Vol. 24
·期 14
·4477
·
IF 3.4
Junyi Wang,Yanpei Xu,Yutong Song,Qi Wang
Hematite (α-Fe2O3) is widely used in sensor sensitization due to its excellent optical properties. In this study, we present a sensitivity-enhanced surface plasmon resonance alcohol sensor based on Fe2O3/Au. We describe the fabrication process of the sensor and characterize its structure. We conduct performance testing on sensors coated multiple times and use solutions with the same gradient of refractive indices as the sensing medium. Within the refractive index range of 1.3335–1.3635, the sensor that was coated twice achieved the highest sensitivity, reaching 2933.2 nm/RIU. This represents a 30.26% enhancement in sensitivity compared to a sensor with a pure gold monolayer film structure. Additionally, we demonstrated the application of this sensor in alcohol concentration detection by testing the alcohol content of common beverages, showing excellent agreement with theoretical values and highlighting the sensor’s potential in food testing.
研究领域:
传感器技术
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2020
·Vol. 37
·期 4
·623-632
·
IF 2.69
Yan Zhinan,Kang Yong,Li Dan,Liu Yu Chun
Hematite (α-Fe 2 O 3 ) is a promising alternative to the catalysts currently used due to its low cost, fairly good activity and environmentally friendly properties. In this study, α-Fe 2 O 3 /SiO 2 nanocatalysts promoted with cobalt and cerium (Co 3 O 4 -CeO 2 -α-Fe 2 O 3 /SiO 2 ) were prepared via wet co-impregnation method, and the effects of promoters on catalytic performances for SO 2 oxidation at different temperatures, SO 2 concentrations, cycle numbers, catalytic stability as well as catalyst charging were investigated. The results indicated that SO 2 conversion rose with the increasing of catalyst charging and SO 2 concentration. Also, the as-prepared catalyst had the maximum SO 2 conversion at the reaction temperature of 500 °C, excellent catalytic recyclability and activity stability. Its physicochemical and redox properties were characterized by XRD, BET, SEM, FT-IR and XPS. The results of XRD and FT-IR spectra confirmed that the formation of Ce 2 FeO 4 network in the Co-Ce co-doped catalysts proved the promoting effect of cerium on higher valence state of the active ingredient. The N2 adsorption/desorption results evidenced that cerium could increase the proportion of mesoporous, and the XPS spectra indicated that cobalt and cerium in the catalysts could increase the available oxygen (O β /O α ) for the redox reaction. Due to its excellent low onset temperature, fairly good activity and environmentally friendly properties, the as-prepared catalyst of Co 3 O 4 -CeO 2 -α-Fe 2 O 3 /SiO 2 appeared to be more efficient for the SO 2 conversion in a large concentration range.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wenyu Wang,Yu Feng,Shuaiguo Zhang,Miao Wang,Wei Song,Luchao Yue,Mingzheng Ge,Jie Mi
Premixed flame configuration is considered as an effective method for the synthesis of carbon materials. In this work, flexible single-walled carbon nanotube network decorated by carbon-encapsulated Fe 2 O 3 nanoparticles (C@Fe 2 O 3 /SWCNT) membrane was in-situ fabricated via a facile floating catalyst premixed ethanol flame method, and followed by annealing treatment. In this process, low-cost ethanol and ferrocene were used as carbon source and catalyst precursor for the synthesis of C@Fe 2 O 3 /SWCNT, respectively. Benefiting from the interconnected conductive network, the as-fabricated C@Fe 2 O 3 /SWCNT membrane was used as a free-standing anode for lithium-ion batteries. Structural characterization revealed that the ultrafine Fe 2 O 3 nanoparticles homogeneously anchored on the SWCNT network, which facilitates the fast diffusion for electron. Furthermore, the carbon layers uniformly enwrap on Fe 2 O 3 can effectively suppress the aggregation and buffer the volume change of Fe 2 O 3 during the lithiation/delithiation process. Consequently, this material delivered an excellent lithium storage performance with a high reversible capacity of 1294.7 mAh g −1 at 50 mA g −1 , and an excellent cyclability of 82.5% retention is obtained after cycles at 2 A g −1 . This study provides a novel low-cost and fast method for preparing flexible advanced electrode for next-generation rechargeable batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Feifei Wang,Xiaolin Yu,Maofa Ge,Sujun Wu
A series of TiO 2 and γ-Fe 2 O 3 co-doped graphene oxide (GO) nanosheets ( x TiO 2 /γ-Fe 2 O 3 /GO) were prepared by a facile self-assembly method. The characterization results show that the x TiO 2 /γ-Fe 2 O 3 /GO have the advantages of narrow band gap energies (<2.47 eV), and high structure stability. The incorporation of TiO 2 into γ-Fe 2 O 3 /GO composite dramatically enhances the catalytic activity, and the 0.03TiO 2 /γ-Fe 2 O 3 /GO composite exhibits the highest catalytic efficiency (99%) for ciprofloxacin (CIP) degradation (10 mg/L, 50 ml) within 140 min under visible light, which is ~1.5 times higher than that of γ-Fe 2 O 3 /GO composite without TiO 2 . Furthermore, the photo-Fenton like mechanism was proposed by quenching experiment and electrochemistry method. The intermediates of the CIP degradation were analyzed by the assistance of LC-MS technology, which provides insight into the pathway of CIP degradation.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Ze Gao,Renming Liu,Daming Yang,Hongji Xu,Yuqi Wang,Bowen Li,Ming Feng,Ting Wang,Gangyong Jin
The adsorption and activation of N 2 as well as the competitive hydrogen evolution reaction (HER) pose significant challenges to the electrocatalytic nitrogen reduction reaction (ENRR), which severely limits its industrial application. Therefore, exploring the ENRR electrocatalysts with high activity and selectivity is an extremely important task. In this work, the oxygen vacancy-rich Fe 2 O 3 /Co 3 O 4 heterostructures (referred to as Vo-X-Fe 2 O 3 /Co 3 O 4 ) were rationally designed by employing Co 3 O 4 as a template via a simple hydrothermal and subsequent calcination method, which acted as highly efficient ENRR electrocatalysts. The electrocatalytic activity of Vo-X-Fe 2 O 3 /Co 3 O 4 can be easily regulated by optimization of the Fe content and the introduction of oxygen vacancy (Vo). The results demonstrate that the optimized Vo-1.0-Fe 2 O 3 /Co 3 O 4 catalyst achieves a high NH 3 yield of 47.37 μg h −1 mg cat −1 and a Faradaic efficiency (FE) of 22.42 %. Moreover, the excellent stability and reproducibility are also demonstrated. The comprehensive characterizations reveal that the exceptional performance of Vo-1.0-Fe 2 O 3 /Co 3 O 4 can be attributed to the improved N 2 adsorption and activation, restricted competitive HER and promoted electron transfer kinetics induced by the synergistic introduction of Vo and Fe. This work emerged a new speculating orientation for rational design of ENRR catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Shakeel Abbas,Tanveer Hussain Bokhari,Mudasir Abbas,Zahid Abbas,Atia Khalid,Saqib Javed,Amina Zafar,Naeem Ahmad,Shafqat Karim,Athar Javed,Ting Zhu,Amjad Nisar,Mashkoor Ahmad
Electrodes material and electrolytes play an important role in defining energy storage performance of supercapacitors. Therefore, the selection of suitable electrode material as well as electrolyte is very crucial. In this work, hematite α-Fe 2 O 3 nanoparticles supported rGO structure is synthesized by a low cost co-precipitation approach. The developed electrode is investigated for supercapacitor in 1.0 M KOH, Na 2 SO 4 and aqueous hybrid electrolyte. It is found that the fabricated (α-Fe 2 O 3 /rGO) electrode delivers an improved specific capacitance of 1272 F g −1 at 1 A g −1 in hybrid electrolyte as compare to 700 F g −1 for KOH and 978 F g −1 for Na 2 SO 4 electrolyte. Moreover, the electrode shows excellent cyclic stability in contrast to the pristine α-Fe2O3 electrode. Interestingly, the assembled prototype asymmetric coin cell supercapacitor (α-Fe 2 O 3 /rGO//AC) device achieved a specific capacitance of 152 F g −1 at 1 A g −1 and energy density of 47.1 Wh kg −1 at a power density of 245.5 W kg −1 . Moreover, the device keeps 94% capacitance retention up to 8,000 cycles at 6 A g −1 . The improved performance is attributing to the increase in conductivity and charge kinetics in hybrid electrolyte. It is suggested that α-Fe 2 O 3 /rGO structure is a useful material for supercapacitors in the presence of hybrid electrolyte.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 3
·695
·
IF 3.426
Jie Zheng,Bin Sun,Xiao-Xiong Wang,Ze-Xing Cai,Xin Ning,Saad M. Alshehri,Tansir Ahamad,Xing-Tao Xu,Yusuke Yamauchi,Yun-Ze Long
The exploration of a new family of flexible and high-performance electromagnetic shielding materials is of great significance to the next generation of intelligent electronic products. In this paper, we report a simple magnetic-electrospinning (MES) method for the preparation of a magnetic flexible film, γ-Fe2O3nanoparticle-embedded polymeric nanofibers. By introducing the extra magnetic field force on γ-Fe2O3nanoparticles within composite fibers, the critical voltage for spinning has been reduced, along with decreased fiber diameters. The MES fibers showed increased strength for the magnetic field alignment of the micro magnets, and the attraction between them assisted the increase in fiber strength. The MES fibers show modifications of the magnetic properties and electrical conductivity, thus leading to better electromagnetic shielding performance.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Qilu Cheng,Hui Jiang,Zhuo Jin,Ying Jiang,Cai Hui,Ligen Xu,Yuhua Zhao,Linna Du
In this study, the impact of Fe 2 O 3 nanoparticles (nFe 2 O 3 ) on microbial extracellular polymeric substances (EPS) and nonylphenol (NP) degradation in sediment were investigated. The results showed that the addition of nFe 2 O 3 lowered the degree of EPS overproduction and the amount of polysaccharides and proteins secreted in NP contaminated sediment. Particularly, the secretion of colloidal EPS (C-EPS) lowered significantly ( P < 0.05), and the content of tyrosine-like, tryptophan-like, and soluble microbial by-product-like substances in C-EPS also decreased, leading to a lower aromaticity, humification, and hydrophobicity of C-EPS. Furthermore, with lower C-EPS content in water, NP was adsorbed to sediment more easily, and the weakened toxic effect of NP to bacteria as well as a higher proportion of organic matter degrading microbes stimulated NP degradation. These findings revealed the vital role of nFe 2 O 3 in alleviating NP toxicity to microbes and reducing NP ecological risk in aquatic environments.
研究领域:
环境科学
·
纳米技术
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xiaohong Ma,Danyang Li,Huacheng Jin,Xi Zeng,Jian Qi,Zongxian Yang,Feifei You,Fangli Yuan
Herein, an urchin-like Fe 2 O 3 @In 2 S 3 hybrid composite is designed and synthesized using a facile process. The composite efficiently harvests light in both the ultraviolet and visible regions, and the unique hierarchical structure provides several advantages for photocatalytic applications: (i) a suitable band-matching structure and broadband-light absorbing capacity enable the reduction of CO 2 into hydrocarbon, (ii) the extensive network of interfacial contact between nano-sized Fe 2 O 3 and In 2 S 3 significantly increases the separation of charge carriers and enhances the utilization of photogenerated electron-hole pairs, and (iii) an abundance of surface oxygen vacancies provide numerous active sites for CO 2 molecule adsorption. The optimized Fe 2 O 3 @In 2 S 3 composite generated CO from the photocatalytic reduction of CO 2 at a rate of 42.83 μmol·g −1 ·h −1 , and no signs of deactivation were observed during continued testing for 32 h under 300 W Xe lamp irradiation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Huiwang Dai,Shuying Xu,Jianxin Chen,Xiaozeng Miao,Jianxi Zhu
Oxalate enhanced mechanism of Fe 3 O 4 @γ-Fe 2 O 3 was developed to provide novel insight into catalytic process regulation of iron oxide catalysts in heterogeneous UV-Fenton system. And the iron oxide composite of Fe 3 O 4 @γ-Fe 2 O 3 was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), fourier transform infrared (FTIR) spectroscopy and nitrogen adsorption-desorption isotherms. The results showed that large amount of iron could be leached from catalyst in the presence of oxalate, which promoted the homogeneous UV-Fenton reactions in solution. Orange II degradation could be significantly enhanced with the increase of the ratio of homogeneous UV-Fenton process to heterogeneous UV-Fenton process. The optimum concentration of oxalate determined by experiment was 0.5 mM in oxalate enhanced heterogeneous UV-Fenton system. On this condition, the pseudo-first-order rate constant value of Orange II degradation was 0.314 min −1 , which was 2.3 times as high as that in heterogeneous UV-Fenton system. The removal rates of color and TOC were 100% and 86.6% after 20 min and 120 min treatment, respectively. In addition, the iron ions in solution could be almost completely adsorbed back to the catalyst surface in later degradation stages of Orange II. During the recycle experiments, the results showed that the increase of pH in solution and the sorption of intermediates on the catalyst surface would hinder oxalate enhanced process and lead to a decrease of degradation rate of Orange II in oxalate enhanced heterogeneous UV-Fenton system.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2017
·
IF 3.33
Junyi Liu,Hua Huang,Xianxiang Liu,Jiafu Xiao,Sheng Zhong,Xichun She,Zaihui Fu,Steven Robert Kirk,Dulin Yin
A series of Fe 2 O 3 doped SBA-15 materials were prepared via an equivalent-volume impregnation method. The resultant Fe 2 O 3 -containing SBA-15 materials showed good performance in phenol methylation . Under the same conditions, the mesoporous catalyst with 5 wt.% Fe 2 O 3 showed the superior catalytic activity to that of pristine α -Fe 2 O 3 even at lower reaction temperature (320 °C vs. 350 °C). The elevated catalytic activity observed for the mesoporous catalyst could be due to high level dispersion of Fe 2 O 3 species in the mesoporous framework. Furthermore, the mesoporous catalyst possessed long lifetimes, which could be used continuously for 2000 h without significant loss of activity.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Ruihui Gan,Yali Wang,Wenjun Ma,Mahmut Dirican,Sa Zhao,Yan Song,Xiangwu Zhang,Chang Ma,Jingli Shi
It is highly desirable to develop high-efficiency non-precious electrocatalysts toward oxygen reduction reaction (ORR). In this work, Fe 2 O 3 -encapsulated and Fe-Nx-containing porous carbon spheres (Fe 2 O 3 /N-MCCS) with unique multi-cage structures and high specific surface area (1360 m 2 g −1 ) are fabricated. The unique porous structure of Fe 2 O 3 /N-MCCS ensures fast transportation of oxygen during ORR. The combined effect of Fe 2 O 3 nanoparticles and Fe-Nx configurations endows Fe 2 O 3 /N-MCCS (E 1/2 = 0.837 V vs. RHE) with superior ORR activity and methanol tolerance to Pt/C. And, Fe 2 O 3 /N-MCCS exhibits better stability than nitrogen-modified carbon. The characterization results of Fe 2 O 3 /N-MCCS after long-term test reveals its excellent structural stability. Impressively, zinc-air battery based on Fe 2 O 3 /N-MCCS showed a peak power density of 132.4 mW cm −2 and a specific capacity of 797 mAh g −1 , respectively.
研究领域:
材料科学
·
电化学
✓ 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）