JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jun Xu,Xiaoqian Qu,Wenjie Yang,Yingqi Luan,Xinsheng Ding,Yingshuai Wang,Lulu Guo,Ke Wu,Zhimin Yang
The development of acetone gas sensors with high sensitivity, low detection limits and scalability holds significant importance for industrial production safety and disease diagnosis. Herein, oxygen vacancies-enriched α-Fe 2 O 3 nanoparticles (M-Fe 2 O 3 NPs) were synthesized through a novel metal-organic gel template strategy. Gas sensing experiments revealed that the prepared M-Fe 2 O 3 sensor displayed unique p-type semiconductor behavior, distinct from the n-type commercial α-Fe 2 O 3 (C-Fe 2 O 3 ) sensor. Moreover, the sensor demonstrated excellent acetone sensing performance, including high response (2.6 @ 20 ppm), low detection limit (0.5 ppm), remarkable repeatability and selectivity, even under 80% relative humidity (RH), displaying impressive response and recovery properties. The enhanced p-type sensing properties of the M-Fe 2 O 3 sensor were attributed to oxygen vacancies facilitating inversion (hole) layer formation and accelerating chemical reactions on the sensing materials surface, as evidenced by gas sensing performance data and O 2 -TPD characterization. Finally, the feasibility of preliminary diabetes diagnosis was demonstrated by detecting acetone levels in human exhaled breath. This work not only presents a straightforward approach for designing oxygen vacancies-enriched metal oxides but also has potential applications in constructing high-performance acetone sensing systems for diabetes diagnosis.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Hao Li,Yuwei Zhao,Yuting Kui,Yiting Wang,Ruiying Zhang,Xiaosi Sang,Jingli Shen,Qiue Cao
Herein, a novel molecularly imprinted photoelectrochemical (MIP-PEC) sensor was fabricated through integrating the ultrathin nanosheets of Fe 2 O 3 (Fe 2 O 3 NSs) with molecular imprinting technology for the ultrasensitive detection of imidacloprid (IMD). Impressively, the two-dimensional Fe 2 O 3 NSs was synthesized on an indium‑tin oxide (ITO) substrate by electrodeposition. Benefiting from its narrow bandgap and large specific surface area, the photogenerated charge separation efficiency of Fe 2 O 3 NSs (∼ 600 μA) was remarkably enhanced compared to that of the commercial Fe 2 O 3 nanoparticles (∼150 μA), which significantly improved the sensitivity of the developed MIP-PEC sensor. Furthermore, the electropolymerization technique was used to form a molecularly imprinted polymer film of IMD on the surface of Fe 2 O 3 NSs/ITO, substantially increased the detection selectivity of the proposed sensor. As a result, the designed MIP-PEC sensor successfully achieved ultrasensitive and specific as well as reliable detection of IMD with a broad linear response (5 nM ∼ 120 μM), low detection limit (1.02 nM) and long storage time (the signal only decreased by 5.03 % after 4 weeks of storage). The recoveries and relative standard deviation (RSD) for the determination of IMD in fruits and environmental water samples by the obtained MIP-PEC were in the range of 92.0 % ∼ 108.0 % and 3.2 % ∼ 4.9 % respectively, validating its field-applicability. Obviously, this work established a novel paradigm for synergistic enhancement of the analysis performance of PEC through integration of the advanced photosensitive materials with molecular imprinting technology.
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高影响因子
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
·
2025
·
IF 1.8
Chenxi Zhang,Jingyi Wang,Sile Liu,Yue Han,Jinyu Wang,Hailong Wang
The widespread use of antibiotics has led to significant water pollution. Photocatalysis can effectively degrade antibiotics, but the performance is greatly limited by the photogenerated carrier recombination in the photocatalytic material g-C3N5. Constructing heterojunctions can enhance interfacial charge transfer, leading to more stable and efficient photocatalysis. This study synthesized a Fe2O3/g-C3N5 heterojunction using the solvothermal method. The Z-scheme charge transfer mechanism facilitated efficient separation of photogenerated carriers, preserving photoelectrons and holes with high redox activity. This process generated a substantial amount of highly reactive free radicals such as ·O2− and ·OH, enabling the efficient degradation of tetracycline (TC). Under the optimal conditions of initial concentration of TC was 200 mg/L, the quality ratio of Fe2O3 and g-C3N5 was 1:2, the catalyst dosage was 50 mg and pH = 7.0, the TC degradation rate reached 92.46% within 60 min of visible light irradiation. The photocatalytic activity’s enhancement was attributed to broad spectral absorption and effective photogenerated carrier separation. Furthermore, the photocatalytic performance can be affected by the presence of inorganic salt ions such as HCO3− and CO32−.
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DOI
PubMed
高影响因子
POLYMER
·
2020
·
IF 4.231
Zhenguo Gao,Jiaoqiang Zhang,Shijie Zhang,Di Lan,Zehao Zhao,Kaichang Kou
Given the remarkable performances of metal frame works (MOFs) and ferrocene containing polymers (FCPs) in electronic devices, the research on integration of structure and function for collaborative optimization of electromagnetic wave (EMW) absorption are still missing. Herein, surface grafting and main chain polymerization methods have been employed on the FCPs modifying zeolitic imidazolate framework-67 (ZIF-67) respectively. Polydopamine-coated ZIF-67 was precursor for grafting type products (ZIF-67@PDA-Fc), while poly (vinyl ferrocene) was for main-chain type products (ZIF-67@PVF). Furthermore, the calcined products, polyhedron capsules structured Co 3 O 4 @C@α-Fe 2 O 3 and Co 3 O 4 /α-Fe 2 O 3 @C microwave absorbers were obtained from ZIF-67@PDA-Fc and ZIF-67@PVF for higher performance EMW absorption. The crystal, morphological and chemical structure was detected via XRD , SEM, TEM, FTIR, Raman, XPS techniques. The EMW absorbability was calculated according to transmission line theory. In particular, the minimum reflection loss (RL min ) of Co 3 O 4 @C@α-Fe 2 O 3 reached −52.2 dB at the thickness of 3.7 mm with effective absorption band ( f E ) 4.4 GHz. It is worth emphasized that the broadest f E was 6.6 GHz obtained at 2.5 mm with RL min reaching −38.4 dB. Additionally, the EMW absorption mechanism was also studied based on the dielectric and magnetic properties . This investigation will push forward further research and practical application of metal organic compounds-based composites.
研究领域:
材料科学
·
电子工程
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高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-9
·
IF 14.919
Wang Xiu-man,Tao Lu-qi,Yuan Min,Wang Ze-ping,Yu Jiabing,Xie Dingli,Luo Feng,Chen Xianping,Wong ChingPing
Sensitivity and pressure range are two significant parameters of pressure sensors. Existing pressure sensors have difficulty achieving both high sensitivity and a wide pressure range. Therefore, we propose a new pressure sensor with a ternary nanocomposite Fe 2 O 3 /C@SnO 2 . The sea urchin-like Fe 2 O 3 structure promotes signal transduction and protects Fe 2 O 3 needles from mechanical breaking, while the acetylene carbon black improves the conductivity of Fe 2 O 3 . Moreover, one part of the SnO 2 nanoparticles adheres to the surfaces of Fe 2 O 3 needles and forms Fe 2 O 3 /SnO 2 heterostructures, while its other part disperses into the carbon layer to form SnO 2 @C structure. Collectively, the synergistic effects of the three structures (Fe 2 O 3 /C, Fe 2 O 3 /SnO 2 and SnO 2 @C) improves on the limited pressure response range of a single structure. The experimental results demonstrate that the Fe 2 O 3 /C@SnO 2 pressure sensor exhibits high sensitivity (680 kPa −1 ), fast response (10 ms), broad range (up to 150 kPa), and good reproducibility (over 3500 cycles under a pressure of 110 kPa), implying that the new pressure sensor has wide application prospects especially in wearable electronic devices and health monitoring.
研究领域:
材料科学
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电子工程
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纳米技术
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Haotian Hao,Yao Zhang,Shuo Xu,Zihao Wang,Yili Wang,Shan Wang,Baoyou Shi
Enriching low-concentration phosphorus in water is prerequisite for phosphorus recovery. In this study, a polyvinyl alcohol (PVA)-assisted high-temperature stabilization method was developed to synthesize a magnetically recoverable La(OH) 3 -Fe 2 O 3 composite, designated as PMLH, via stable crosslinking. Compared with MLH-1, a conventionally synthesized La(OH) 3 /Fe 2 O 3 composite, PMLH-1 (La/Fe molar ratio = 1:1) exhibited 31.77 % more La(OH) 3 adsorption sites and maintained 2.32 times higher phosphate adsorption capacity after 10 reuse cycles. The optimal synthesis conditions were determined as calcination temperature of 150 °C, PVA dosage of 0.375 %, and La-to-Fe molar ratio of 1.5. Structural characterization revealed that PMLH-1.5 consisted of rod-like La(OH) 3 and irregular γ-Fe 2 O 3 tightly bonded via PVA bridging. The composite demonstrated a maximum phosphate adsorption capacity of 79.51 mg P/g, reaching equilibrium within 16 h at 0.5 g/L dosage. The saturated adsorption remained stable across pH 3–9. While coexisting NO 3 − and humic acid showed negligible effects, Mg 2+ , Cl − , SO 4 2− and HCO 3 − reduced adsorption by 10–20 %, whereas Ca 2+ significantly enhanced phosphate uptake. Notably, PMLH-1.5 exhibited exceptional practical performance, exceeding its theoretical saturation capacity by 20 % with prolonged adsorption in real water matrices. Efficient desorption (4 h) was achieved using 2.5 M NaOH/1.875 M NaCl mixed solution. The PMLH-1.5 demonstrated remarkable stability across 40 consecutive adsorption-desorption cycles using actual water samples, consistently meeting discharge standards for 13–14 full cycles. This performance established a new reference point for cyclic durability assessments in water treatment research. Sequential desorption in the same desorbent progressively concentrated phosphorus from 0 to 26.69 mg/L, enabling effective low-concentration phosphate enrichment. Economic analysis confirmed that PMLH-1.5 exhibits a competitive chemical cost, ranging from 3.28 to 5.26 CNY/mol P (0.46 to 0.74 US $/mol P).
研究领域:
环境科学
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材料科学
·
水处理技术
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可持续资源回收
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Wenjuan Shen,Bingning Wang,Falong Jia,Zhihui Ai,Lizhi Zhang
In general, the final product of atrazine (ATR) degradation by reactive oxygen species is cyanuric acid bearing a stable s -triazine ring, which is not further oxidized under mild conditions. In this study, we demonstrate that the presence of Ni(II) can increase the aerobic ATR degradation rate of core–shell Fe@Fe 2 O 3 nanowires (CSFN) by 6 times and also achieve the cleavage of recalcitrant s -triazine ring. The cleavage of s -triazine ring in this novel system was confirmed by the measurements of formic acid and nitrite acid. On the basis of experimental results, a feasible mechanism was proposed to account for the promoted aerobic ATR degradation and the facile s -triazine ring cleavage as follows. First, Ni(II) adsorbed on the surface of CSFN was reduced to nickel metal, which favored the generation of active hydrogen (•H). The in-situ generated •H then reduced ATR to 4-ethylamino-6-isopropylamino-1,3,5-triazine intermediate of easy ring opening property, rather than the recalcitrant cyanuric acid. Finally, this ATR degradation pathway change promoted the aerobic ATR degradation and benefited the s -triazine ring cleavage. This study clarifies the importance of degradation pathway on the ring-opening of organic pollutants, and also provides a mild method to remove s -triazine herbicides with molecular oxygen and zero-valent iron.
研究领域:
环境科学
·
化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shizhen Liu,Shaobin Wang,Yao Jiang,Zhenqing Zhao,Guiyuan Jiang,Zhenyu Sun
Fe 2 O 3 loaded porous graphitic carbon nitride ( g -C 3 N 4 ) photocatalysts have been prepared simply by thermal treatment in a hypoxia environment and the photocatalytic activities were evaluated in photocatalytic nitrogen fixation under artificial solar irradiation. Efficient reduction of dinitrogen to ammonia by photocatalysis over the hybrid catalysts was achieved even when the content of iron in the sample was less than 1 wt%, with an ammonia yield rate reaching 47.9 mg/L/h, 6 times higher than that of bare g -C 3 N 4 . The photocatalytic performance also outperforms many currently reported g -C 3 N 4 -based photocatalysts. X-ray photoelectron spectroscopy and Mӧssbauer spectroscopy confirmed the formation of Fe 2 O 3 in the photocatalyst and BET analysis revealed an enlarged pore volume by adjusting treatment temperature, providing benefits for photogenerated carrier separation and N 2 adsorption over the catalyst surface. Such g -C 3 N 4 supported Fe 2 O 3 nanoparticles with low-cost holds promise as one of the family member of photocatalysts for efficient N 2 fixation.
研究领域:
材料化学
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环境催化
·
能源化学
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光催化
·
无机功能材料
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Bojing Sun,Wei Zhou,Haoze Li,Liping Ren,Panzhe Qiao,Fang Xiao,Lei Wang,Baojiang Jiang,Honggang Fu
The solar-light-harvesting and separation of nanostructured photocatalysts in slurry systems are key issues in fields of photocatalysis. Herein, magnetic Fe 2 O 3 /mesoporous black TiO 2 hollow sphere heterojunctions (M-Fe 2 O 3 /b-TiO 2 ) are fabricated through wet-impregnation and surface hydrogenation strategy, which show wide-spectrum response and magnetic separation. The decreased specific surfaces, pore sizes and pore volumes from ∼80 to 67 m 2 g −1 , ∼12 to 10.3 nm, and ∼0.20 to 0.16 cm 3 g −1 , respectively, all confirm the efficient loading of magnetic Fe 2 O 3 . The M-Fe 2 O 3 /b-TiO 2 with narrow bandgap of ∼2.41 eV extends the photoresponse from UV to near infrared region and exhibits excellent solar-driven photocatalytic degradation performance and long-term stability for complete mineralization methyl orange and high-toxic herbicide metribuzin. The photocatalytic reaction apparent rate constant k for metribuzin is ∼ 9 times higher than that of pristine TiO 2 under AM 1.5 irradiation. Especially for single-wavelength of 950 nm, the degradation ratio is up to 4%. The enhancement is attributed to Ti 3+ and magnetic Fe 2 O 3 with narrow bandgap facilitating solar-light-harvesting, the hollow structure benefiting mass transport, and the heterojunctions favoring the spatial separation of photogenerated electron-hole pairs. The magnetic separation is conducive to recycle of photocatalysts, which favors practical applications in environment.
研究领域:
材料科学
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光催化
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环境科学
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纳米技术
·
能源材料
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DOI
高影响因子
Journal of Materiomics
·
2024
·Vol. 10
·期 6
·1243-1251
·
IF 8.4
Jicheng Xu,Huachao Tao,Zerong Deng,Xuelin Yang,Li-Zhen Fan
NASICON-structured Na 3 Zr 2 Si 2 PO 12 (NZSP) has been considered as one of the ideal electrolytes for all-solid-state sodium metal batteries (ASSSB). However, the practical application of NZSP-based ASSSB is hindered by the low ionic conductivity and large interfacial resistance caused by the poor contact between NZSP and Na metal. Herein, the introduction of Fe 2 O 3 not only improves ionic conductivity and reduces activation energy by the doping of Fe 3+ in the crystal structure of NZSP, but also reduces the interfacial resistance and enhances interface stability between NZSP and Na metal anode. The synergistic effects significantly enhance the cycling stability, rate capability, and critical current density of the symmetrical solid-state cells. The interfacial reaction mechanism indicates that Fe 3+ in the interface is reduced Fe 2+ by Na anode, which effectively even the electric-filed distribution and suppresses the dendrite growth. Consequently, the symmetric solid-state cells exhibit stable cycling performance for 1,500 h at 0.1 mA·cm −1 /0.1 mA·h·cm −1 and over 900 h at 0.2 mA·cm −1 /0.2 mA·h·cm −1 . The Na|NZSP-0.075%Fe 2 O 3 |Na 2 FePO 4 F solid-state full cells display high capacity retention of 94.2% after 100 cycles at 0.5 C. The stable interface of NZSP/Na and improved ionic conductivity contribute to excellent electrochemical performance, which accelerates the practical application of ASSSB.
研究领域:
材料科学
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电化学
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储能
·
固态电池
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DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 37
·15495-15501
·
IF 0
Guangdi Nie,Xiaofeng Lu,Junyu Lei,Ziqiao Jiang,Ce Wang
V2O5-doped α-Fe2O3 composite nanotubes have been successfully fabricated via a simple one-step electrospinning technique followed by calcination treatment. For the first time, we found that the magnetic properties of the as-prepared samples were significantly dependent on the contents of the dopant. In comparison with pristine α-Fe2O3, perfect reversibility, more excellent capacitance and better cycling stability were simultaneously observed for the hybrid metal oxide with an appropriate mass ratio of V2O5 (VFNT1) when it was utilized for supercapacitor electrodes, indicating that the doped α-Fe2O3 tubular nanostructures are fairly promising for practical applications not only in magnetic recording but also in the energy storage field.
研究领域:
材料科学
·
纳米技术
·
能量存储
·
磁性材料
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DOI
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Haihua Hu,Fu-Hua Sun,Jinfeng Dong,Hua-Lu Zhuang,Bowen Cai,Jun Pei,Jing-Feng Li
Nanostructuring and defect engineering are increasingly employed as processing strategies for thermoelectric performance enhancement, and special attention has been paid to nanostructured interfaces and dislocations that can effectively scatter low- and mid-frequency phonons. This work demonstrated that their combination was realized in Fe2O3-dispersed tetrahedrite (Cu12Sb4S13) nanocomposites, leading to significantly reduced thermal conductivities around 0.9 W m–1 K–1 at all temperatures and hence a high ZT value of ∼1.0, which increases by ∼33% compared with that of the matrix. The plausible enhancement mechanisms have been analyzed with an emphasis on the incorporation of magnetic γ-Fe2O3 nanoparticles (NPs) into Cu11.5Ni0.5Sb4S13, leading to various nanostructures (NPs, nanoprecipitates, and nanotwins) and dislocations. A calculated efficiency of ∼9.3% and an average ZT of 0.63 also reveal the potential application of tetrahedrite at medium temperatures. Additionally, the mechanical properties are improved because of a second phase strengthening and nanotwin structures.
研究领域:
材料科学
·
热电学
·
纳米技术
·
固体物理
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DOI
高影响因子
危险品化学品经营许可证（带存储）