ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Yu Bing,Zhao Song,Hongtao Jiang,Xiaoyi Xu,Zhongzheng Yu,Tingting Zhou,Tong Zhang
Water competitive adsorption and limited reaction sites on the micro-scale sensing area of micro-electro-mechanical system (MEMS) sensors are two bottleneck problems that restrict the detection of trace indoor polluted gases, leading to drifting and weak signals. To address this, a “duet-insurance” sensing strategy is proposed to protect and amplify the sensing signal. For the first-level protection, the well-designed double-layer structure consisting of Janus TpMa covalent organic framework (COF)/Eu-doped α-Fe 2 O 3 can resist diffusion of water molecules and facilitate the electron transfer from formaldehyde (CH 2 O) to sensing layers, benefiting from the outer hydrophobic character of Janus TpMa and the strong CH 2 O adsorption capacity of Eu-doped Fe 2 O 3 . For the second-level amplification, the unique variable temperature excitation facilitates the deep penetration of CH 2 O into the active sites across COF layers, enabling signal amplification through thermally actuated carrier modulation. The sensor demonstrates high sensing ability to the CH 2 O, with an ultra-low limit of detection of 794 ppt. Leveraging the novel sensing strategy, a multi-functional, visual sensing system is designed to identify multi-indoor pollution gases by feature signal encoding and color mapping, showcasing the promising potential for MEMS sensors based on Janus TpMa COF/Eu-doped α-Fe 2 O 3 materials.
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高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Xue-Fei Chen,Xiangping Xian,Wei-Zhi Chen,Binmeng Chen
In this study, a pioneering methodology is delineated, wherein Fe 2 O 3 -enriched recycled red brick aggregates are harnessed as avant-garde carrier substrates, resulting in a profound enhancement of the intrinsic self-cleansing capabilities of TiO 2 . The innate porous core-shell architecture of these recycled aggregates engenders a notable synergistic interaction between nano-TiO 2 and Fe 2 O 3 , culminating in a marked escalation of photocatalytic efficiency. An exhaustive examination of the degradation proficiency across a spectrum of samples against methyl blue, conducted over a gradient of temporal intervals, has been executed. The findings indicate that the rates of degradation for all samples increase progressively with the prolongation of exposure to UV irradiation. The control group, consisting exclusively of white cement, demonstrated the most diminutive degradation rate, achieving merely a 4 % reduction in methyl blue concentration through UV irradiation alone. Conversely, the nano-TiO2-modified recycled grey brick aggregate (NT-RGBA) and recycled red brick aggregate (NT-RRBA) samples showcased substantially elevated degradation rates, a phenomenon attributable to the incorporation of photocatalytic agents capable of capitalizing on UV energy to expedite the degradation process of methyl blue. The NT-RRBA composite, an amalgamation of the photocatalytic attributes of TiO 2 , the synergistic interplay between Fe 2 O 3 and TiO 2 , and the intricate three-dimensional pore framework of RRBA, manifested the most pronounced degradation rate. To delve deeper into the determinants influencing the efficacy of photocatalytic degradation, a fuzzy inference system has been deployed to construct a mathematical model that scrutinizes the effects of variables such as the initial concentration of pollutants and the flow rate. This quantitative methodology affords to establish a functional relationship that encapsulates the underlying dynamics of the photocatalytic degradation phenomenon. Deploying this functional material, a derivative of construction detritus, paves the way for an innovative strategy of closed-loop resource utilization, marking a significant milestone towards sustainable development within the construction sector.
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高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Minghui Li,Jiayi Huang,Ruyue Deng,Yongkang Yan,Wei Zhang,Danhua Ge,Xiaojun Chen
In this study, Ce-doping Fe-based nanozymes were employed to construct a simple multichannel colorimetric sensor array for the identification and detection of quinolone antibiotics. The study demonstrates that Ce doping effectively induced a phase transformation from α-Fe 2 O 3 /Fe 7 (PO 4 ) 6 (Fe-P) to γ-Fe 2 O 3 /Fe 7 (PO 4 ) 6 composites (0.5-Ce/Fe-P) after a phosphorization treatment. This transformation led to enhanced peroxidase (POD)-like activity in 0.5-Ce/Fe-P compared to Fe-P, thanks to the excellent catalytic properties of γ-Fe 2 O 3 and the porous nature of the composites. The proposed colorimetric sensor exhibited wide linear ranges: 0.05–2.5 μM and 200–650 μM for norfloxacin (NOR), 0.05–2.5 μM and 350–750 μM for ciprofloxacin (CIP), and 0.05–2.5 μM and 300–650 μM for enrofloxacin (ENR), with the low detection limits of 0.78, 0.80 and 7.18 nM, respectively. Furthermore, the study employed principal component analysis (PCA) and hierarchical clustering analysis (HCA) to successfully distinguish between NOR, CIP and ENR, demonstrating the sensor array's ability to differentiate antibiotics. This study contributes to the food safety and environmental protection field by providing a novel tool for monitoring antibiotics in drinking water.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2011
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IF 3.723
Hui Wang,Yuming Huang
Prussian-blue (PB)-modified γ-Fe 2 O 3 magnetic nanoparticles (PBMNPs) were successfully synthesized based on electric interactions between negatively charged [Fe(CN) 6 ] 4− and positively charged γ-Fe 2 O 3 nanoparticles. The in situ PB coating was generated by the coordinating reaction between the adsorbed [Fe(CN) 6 ] 4− and the ferric ions on the surface of γ-Fe 2 O 3 NPs. The as-prepared PBMNPs were characterized by FT-IR, XRD, TEM, and used to remove organic pollutants from aqueous solution, namely, using methylene blue (MB) as model compound. The experimental results showed that the target compound could be removed efficiently from solution over a wide pH range from 3 to 10 in the presence of PBMNPs as peroxidase-like catalyst and H 2 O 2 as oxidant. Under optimal conditions, MB could be removed completely after 120 min of reaction at 298 K; the chemical oxygen demand (COD) removal efficiency and the total organic carbon (TOC) abatement efficiency were 53.6% and 35%, respectively. Furthermore, the PBMNPs catalysts showed high magnetization, temperature tolerance, long-term storage and operational stability, and they could be readily separated from solution by applying an external magnetic field. Finally, a possible reaction mechanism for MB degradation was also discussed.
研究领域:
环境科学
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纳米材料学
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催化化学
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水处理技术
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环境功能材料
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Li Lin,Fangjie Zhang,Xing Hou,Linlin Wang,Weijie Wu,Longfei Wang,Yi Li,Haijiao Xie
The advanced oxidation processes based on the electro-Fenton reactions show great potentials as a wastewater treatment approach for removing emerging contaminants. In the electro-Fenton system, some factors still exist affecting the treatment efficiency, e.g., the formation of iron sludge, a narrow pH working range, and slow conversion rates between Fe 2+ and Fe 3+ . In this research, a novel heterogeneous flow-through electro-Fenton system was constructed, and carbon felt was used as the template material for the preparation of an etched carbon felt cathode loaded with zero-valent iron and iron oxide (Fe@Fe 2 O 3 /ECF) for the degradation of bisphenol A , which addressed the aforementioned issues. The Fe@Fe 2 O 3 /ECF electrode showed excellent performance across a pH range between 3 and 11, with exceptional stability and resistance to other substances in water. For the three pollutants, bisphenol A, tetracycline and ciprofloxacin, the highest degradation efficiency can reach 99.3 %. Compared to traditional electro-Fenton systems, the novel process exhibited superior performances due to synergistic effects from feasible flow design, enhanced electrochemical reactivity and greater exposure of active sites. Through electron spin resonance and free-radical quenching experiments, it was determined that the primary species participating in the heterogeneous electro-Fenton process were the hydroxyl radical and superoxide anion. Specifically, the hydroxyl radical was identified as playing a pivotal role in the degradation of bisphenol A. After a continuous operation of 240 min, the electrode showed low metal ion leaching rate and good stability, with the concentrations of leached Fe and Co ions to be only 17 and 7 μg/L, respectively. Meanwhile, the removal efficiency was only decreased by 5.7 % during the process. Through density functional theory calculation and intermediate product analysis, three potential degradation pathways were proposed, with the cleavage of carbon bonds serving as the main degradation approach. The toxicity analysis demonstrated that the intermediates were generally less toxic than BPA during treatments. This research provides a fresh means for promoting a valence state cycling of ferric species in electro-Fenton system, which has potential applications in wastewater treatment containing emerging contaminants.
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高影响因子
Arabian Journal of Chemistry
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2023
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IF 6
Mingyi Ma,Zhixiang Lv,You Li,Ziye Zhu,Chen Ling,Dawei He,Ruijiang Liu
Problem Unhealthy dietary habits and inadequate existing treatment technologies have led to high morbidity and mortality rates in patients with gastric cancer, and the research shows that curcumin has excellent antitumor properties, however, the non-water-soluble characteristic of curcumin limits its applications. To break the limitation, the targeted drug carriers become the urgent need to treat gastric cancer. Method The heterogeneous magnetic α-Fe 2 O 3 /Fe 3 O 4 nanoparticles were obtained by rapid combustion method with citric acid (CA) and ferric nitrate as raw materials and anhydrous ethanol as solvent and fuel, and then modified with citric acid (CA) and chitosan (CTS), and loaded curcumin (Cur) to form α-Fe 2 O 3 /Fe 3 O 4 -CA-CTS-Cur nanosystem. Results The particle sizes of heterogeneous magnetic α-Fe 2 O 3 /Fe 3 O 4 nanoparticles and α-Fe 2 O 3 /Fe 3 O 4 -CA-CTS-Cur nanosystem were 24.9 nm and 35.6 nm, respectively, and their respective saturation magnetization were 70.9 emu/g and 30.3 emu/g. The magnetic α-Fe 2 O 3 /Fe 3 O 4 -CA-CTS-Cur nanosystem had good stability, excellent drug release rate, and enhanced apoptosis to gastric cancer cells (SGC-7901) through the caspase pathway and ferroptosis of cells. Conclusions The magnetic drug delivery nanosystem was successfully constructed, and revealed significant inhibitory and killing effects on SGC-7901 cells, and low toxic and side effects on normal cells.
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高影响因子
JOURNAL OF POWER SOURCES
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2020
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IF 8.247
Jing Li,Feng Li,Jun Jin
Hematite can be used as an efficient photoanode for solar water oxidation , but its oxygen evolution kinetics are quite slow. Herein, we developed an efficient hole transport photoanode via the in situ growth of ultrathin Fe-doped NiOOH on fluorine-doped hematite arrays using a natural growth strategy. The resulting FeNiOOH/F–Fe 2 O 3 photoanode showed a high charge separation and injection efficiency. It achieved a stable photocurrent density of 2.52 mA cm −2 at 1.23 V vs. RHE, which was approximately 4.1-fold higher than that of pristine α-Fe 2 O 3 . Systematic studies revealed that the excellent photoelectrochemical activity was due to heteroatom doping and interactions between the co-catalyst (FeNiOOH) and F–Fe 2 O 3 . Fe doping primarily changed the lattice strain of the co-catalyst, while F doping decreased surface charge recombination and enhanced the intrinsic conductivity of hematite by increasing the carrier density. An ultrathin, amorphous layer of FeNiOOH further accelerated photogenerated hole extraction and the water oxidation kinetics. This work provides a method to produce new, cost-effective photoanodes for clean hydrogen production .
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Shi-Wen Lv,Jing-Min Liu,Ning Zhao,Chun-Yang Li,Fei-Er Yang,Zhi-Hao Wang,Shuo Wang
Photocatalysis is a promising strategy to remove contaminants from wastewater. Herein, a novel g-C 3 N 4 @CoFe 2 O 4 /Fe 2 O 3 composite was synthesized via a feasible hydrothermal and calcination method. Benefiting from the Z-scheme heterojunction formed between MOF-derived CoFe 2 O 4 /Fe 2 O 3 and g-C 3 N 4 , the recombination of photoinduced electrons and holes could be inhibited effectively. Meanwhile, doping a little amount of MOF-derived CoFe 2 O 4 /Fe 2 O 3 could remarkably enhance visible light absorption ability of g-C 3 N 4 and reduce band gap of g-C 3 N 4 . Then, the resulting hybrid photocatalysts were employed as a high-efficient mediator to activate persulfate for degrading emergent organic contaminants under visible light irradiation. Significantly, TC of 99.7%, BPA of 98.1%, SMX of 94.8%, DFC of 97.0%, IBP of 96.1% and OFX of 96.5% could be removed within 80 min. Some important factors influencing photocatalytic degradation process were also investigated. The trapping experiments and EPR tests revealed that both SO 4 − and OH were involved in photocatalytic reaction. Besides, the introduction of MOF-derived CoFe 2 O 4 /Fe 2 O 3 provided a new approach for generating radical species. More importantly, obtained g-C 3 N 4 @CoFe 2 O 4 /Fe 2 O 3 -2 composites with good stability exhibited great application potential in the actual degradation tests. To sum up, current work provided novel ideas for photocatalytic oxidation technology in the organic pollution degradation.
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高影响因子
BIOSENSORS & BIOELECTRONICS
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2015
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IF 6.409
Biyan Xu,Delun Zheng,Weiwei Qiu,Feng Gao,Shaoxiong Jiang,Qingxiang Wang
In this work, a novel electrochemical DNA biosensor has been developed based on the hybrid film of fern leaf-like α-Fe 2 O 3 microparticles and chitosan (CS). The fern leaf-like α-Fe 2 O 3 microparticles were synthesized via a facile template-free hydrothermal method, and their morphologies were characterized by X-ray diffraction, energy dispersive spectrometry, scanning electron microscope, and transmission electron microscope. Electrochemical characterization assays revealed that the hybrid film modified electrode had remarkable synergistic effects of the large accessible surface area and high electrical conductivity of semiconductive Fe 2 O 3 , and the good film stability of CS. Based on the rich amino groups on CS, the CS–Fe 2 O 3 hybrid film was employed as a functional matrix for probe DNA immobilization using terephthalaldehyde (TPA) as a bifunctional arm-linker. The hybridization capacity of the developed biosensor was evaluated with electrochemical impedance spectroscopy (EIS) using [Fe(CN) 6 ] 3−/4− as the indicating probe. A wide dynamic detection range from 1.0×10 −14 to 1.0×10 −10 M with ultralow detection limit of 5.6×10 −15 M was achieved for the target DNA. The hybridization selectivity experiments further revealed that the biosensor could discriminate fully complementary sequences from one-base mismatched, three-base mismatched, and non-complementary sequences. Moreover, the biosensor showed the advantage of good regeneration ability and reproducibility.
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Guangzhao Zhou,Ziyu Wang,Xiaochao Wang,Yiran Zhang,Xuteng Zhao,Qi Chen,Ting Chen,Zhen Huang,He Lin
Nonthermal plasma catalysis offers the potential to synthesize ammonia on a distributed scale under ambient pressure by consuming renewable electricity. Clarifying the relationship between plasma discharge and the role of catalysts is beneficial to the performance improvement of nonthermal-plasma-catalytic ammonia synthesis (NTPCAS). In this study, the plasma discharge was enhanced using CeO2 and Fe2O3/CeO2 (Fe/Ce) mechanically mixed with dielectric Al2O3, recorded as Ce@Al and Fe/Ce@Al, respectively, and the promoting effect of plasma discharge enhancement on the catalytic role of Fe/Ce and CeO2 in NTPCAS was investigated in a dielectric barrier discharge reactor under atmospheric pressure. The results indicate that the concentration of ammonia synthesized using Fe/Ce was only 2.7% higher than that synthesized using CeO2 and that synthesized using Fe/Ce@Al was 36.5% higher than that synthesized using Ce@Al and 102.6% higher than that synthesized using Fe/Ce at maximum. In addition, the ammonia production rate of Fe/Ce in Fe/Ce@Al with the optimum Al2O3 mixing ratio was 8.8 times that in pure Fe/Ce. U–I curves, U–Qc curves, and self-luminous optical imaging results of the discharge region packed with the catalysts indicated that Al2O3 mixing effectively strengthened the plasma discharge. Catalyst characterization showed that Fe/Ce had better catalytic properties than CeO2, explaining the better performance of Fe/Ce@Al than that of Ce@Al in the NTPCAS. In situ N2 and H2 adsorption, desorption, and reaction behaviors over catalysts revealed that significantly improved N2 adsorption and activation over Fe/Ce@Al under plasma conditions were the key to NTPCAS. The strategy of mixing highly active ammonia synthesis catalysts with discharge-enhanced materials can significantly improve the performance of NTPCAS catalysts, thus providing a novel approach to designing catalysts for NTPCAS.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Jingtao Wu,Xiaodong Yue,Tianyu Wang,Yafeng Zhang,Yuan Jin,Guangli Li
Excessive intake of baicalein (BA) may lead to many adverse heathy risks. Hence, it is highly desirable to develop a convenient and sensitive method for the determination of BA. Herein, a low-cost and highly sensitive electrochemical sensor was fabricated for determination of BA in herbal medicine based on shuttle-shape α-Fe 2 O 3 nanoparticles decorated multiwalled carbon nanotubes (s-Fe 2 O 3 /MWCNTs). Various microscopic and spectroscopic methods confirmed the successful formation of s-Fe 2 O 3 /MWCNTs. CV and EIS techniques revealed that the s-Fe 2 O 3 /MWCNTs significantly improved the electroactive surface area and electron transport ability. Owing to the synergistic interactions between s-Fe 2 O 3 NPs and MWCNTs, the s-Fe 2 O 3 /MWCNTs exhibited superior electrocatalytic toward BA oxidation through a two electrons two protons pathway. Under optimal experimental conditions (accumulation potential of 0 V, accumulation time of 120 s, and pH of 6.0), The s-Fe 2 O 3 /MWCNT/GCE displayed a wide detection range from 0.001 to 10 μM with an ultrahigh sensitivity (6.154 μA μM −1 ) and extremely low limit of detection (0.2 nM). The s-Fe 2 O 3 /MWCNTs demonstrated strong anti-interfering ability against common potential interfering substances even at high concentration, and maintained stable peak current responses for at least 2 weeks. Furthermore, the s-Fe 2 O 3 /MWCNTs achieved the reliable detection of BA in traditional herbal medicine with satisfactory recovery (97 − 105 %). Considering their low cost, convenient operation, and comprehensive sensing performance, the s-Fe 2 O 3 /MWCNTs have demonstrated promising application prospects in sensitive detection of flavonoids.
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高影响因子
Journal of Environmental Sciences
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2020
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IF 4.302
Qian Guo,Guangbei Tang,Wenjie Zhu,Yongming Luo,Xiaoya Gao
Pyrite is the most abundant sulfide semiconductor mineral with excellent optical properties . However, few reports have investigated its photocatalytic activity because of the low photogenerated carrier separation efficiency. In this work, a Z-scheme FeS 2 /Fe 2 O 3 composite photocatalyst was fabricated in situ via structural transformation of pyrite through heat treatment. A remarkably enhanced photocatalytic performance was observed over the FeS 2 /Fe 2 O 3 composite photocatalyst. Compared with the pristine pyrite, the degradation efficiency of carbamazepine (CBZ) reached 65% at the added hexavalent chromium (Cr(Ⅵ)) concentration of 20 mg/L and the Cr(Ⅵ) was nearly completely reduced in the mixed system using FeS 2 /Fe 2 O 3 within 30 min under simulated solar light irradiation. The enhanced photocatalytic activity can be attributed to the efficient separation and transfer of photogenerated carriers in the FeS 2 /Fe 2 O 3 composite photocatalyst. This facilitated the generation of •OH, hole (h + ) and •O 2 − species, which participated in the photocatalytic reaction with CBZ. Based on the measurement of the active species and electric properties, a Z-scheme electron transfer pathway was proposed for the FeS 2 /Fe 2 O 3 composite photocatalyst. This work broadens the application potential of pyrite in environmental remediation.
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PubMed
高影响因子
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