Frontiers of Environmental Science & Engineering
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2025
·Vol. 19
·期 12
·1-17
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IF 6.4
Wei Biao,Liu Daoqing,Peng Ran,Zhou Yi,Li Qianwei,Zhao Huazhang
The remediation of nitroaromatic-contaminated water systems remains a critical environmental challenge, creating the urgent need for cost-effective, non-precious metal catalysts to increase wastewater biodegradability. In this study, we present an Fe/N-functionalized three-dimensional porous carbon (Fe–N–C) catalyst synthesized via a straightforward pyrolysis approach that enables efficient nitrobenzene (NB) degradation via electrochemical and chemical reduction pathways. The high-temperature pyrolysis process facilitates the iron-catalyzed reconstruction of the carbon matrix, resulting in a hierarchically porous structure with increased graphitization and uniformly distributed macrocyclic Fe–N 4 coordination sites. These structural features give the Fe–N–C catalyst exceptional electron transfer kinetics, catalytic activity, and pH adaptability, surpassing conventional graphite (GR) and nitrogen-doped carbons (NPCs) in NB reduction. Systematic evaluation of the electrochemical reduction performance revealed that the Fe–N–C electrode achieved the highest NB removal efficiency. To further assess the versatility of the catalyst, a functionalized Fe–N–C/zero-valent iron (ZVI) composite was engineered by integrating Fe–N–C as a catalytic layer onto the reductant ZVI. Compared with ZVI alone, this composite markedly increased the NB reduction efficiency. These findings provide valuable insights into the electrochemical reduction process of Fe–N–C and new directions for the rational design of efficient nitrobenzene reduction systems.
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Journal of Experimental Nanoscience
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2012
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IF 1.011
Zhongping Chen
The precursors used to prepare high-quality nanoparticles by high-temperature decomposition are expensive and toxic organometallic compounds. Fe(OH)3, an inexpensive and environmentally friendly iron-containing compound, is for the first time introduced to act as an precursor to generate monodisperse iron oxide nanoparticles. The obtained nanoparticles are characterised by transmission electronic microscopy, IR, XRD and vibrating sample magnetometer. Organic-soluble ferromagnetic rod-like and superparamagnetic dot-like nanoparticles with the size ranging from 12 to 25 nm are obtained in a nonpolar solvent by adjusting reaction parameters, such as surfactant concentration and reaction time. Water-soluble nanoparticles can be synthesised when a bipolar solvent is used instead of nonpolar solvent. The results show that Fe(OH)3 is a promising precursor for the high-temperature decomposition method.
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APPLIED SURFACE SCIENCE
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2016
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IF 3.15
Qiang Zhao,Dandan Li,Guofeng Gao,Wen Yuan,Genyan Hao,Jinping Li
We describe the preparation of three partially ordered iron-based catalyst films (Fe-OAc, Fe-Pro, Fe-But) with nanoporous structure by electrodeposition from organate electrolytes containing Fe 2+ . The anions of the organic acids assisted the partial ordering of the nanostructured Fe(III) catalysts for water oxidation. A model involving an electrical double layer is invoked to explain the role of the organate electrolyte system in their formation. Analytical results have revealed the main component of the iron-based films to be a β-FeOOH structure. The Fe-But catalyst catalyzed water oxidation in 0.1 m potassium carbonate solution with an average activity of 1.48 mA cm −2 and an overpotential of 433 mV.
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ANALYST
·
2019
·Vol. 144
·期 8
·2716-2724
·
IF 4.019
Zunfu Hu,Yongheng Yin,Qingyun Liu,Xiuwen Zheng
The rapid and sensitive detection of H2O2 is of great importance for a series of industries. In this work, surface-modified FePt nanoparticles were loaded into metal–organic frameworks (MOFs, MIL-101(Fe)) in a facile in situ way and the resulting material (FePt@MOFs NCs) acted as a high efficient colorimetric detection agent. The as-prepared FePt@MOFs NCs possess a well-defined octahedron shape and high stability in water. Via the oxidation reaction of the chromogenic substrate 4,4′-bi-2,6-xylidine, the obtained FePt@MOFs NCs were proved to possess prominent peroxidase-mimic activity. Under the most favorable conditions, the linear range for H2O2 detection was 40 μM to 800 μM and the detection limit was 18.9 μM. Furthermore, FePt@MOFs NCs were successfully applied to the detection of H2O2 in real samples such as fruit juice. The developed colorimetric sensing platform is expected to have potential for the exact detection of H2O2 for the food, mining and bio-pharmaceutical industries, due to its high stability, sensitivity, rapidness and easy preparation.
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JOURNAL OF HAZARDOUS MATERIALS
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2018
·
IF 6.434
Lei He,Yanan Dong,Yane Zheng,Qingming Jia,Shaoyun Shan,Yaqin Zhang
A novel magnetic MIL-101(Fe)/TiO 2 composite was synthesized for photo degradation of tetracycline (TC) under solar light. The composite was characterized by XRD, TGA, SEM, TEM, EDS, BET, FTIR, XPS, VSM, ESR, and PL. The resultant composite was environment friendly material, which exhibited high TC degradation efficiency and excellent reusability. In the meantime, it could be separated easily from TC solution by using magnet, which would save significant time and cost of preparation and degradation, having broad prospect in application. Using 1 g L −1 magnetic MIL-101(Fe)/TiO 2 at pH = 7, 92.76% degradation efficiency was achieved under solar light irradiation in 10 min for 20 mg L −1 TC. Further experiments indicated that TiO 2 introduced in the composite played an important role in the degradation process, which could be activated by the UV light in solar light to generate large amount of O 2 − and OH radicals. The degradation efficiency of TC in this paper was significantly higher than other research papers reported in last three years. This study put forward new magnetic Fe-based metal-organic frameworks (MOFs)/TiO 2 composite for degrading pharmaceutical wastewater.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Yan Yuan,Junxiang Wang,Zongqian Hu,Haiping Lei,Donghua Tian,Shuqiang Jiao
A Prussian blue analogue, Na 2 Co 3 [Fe(CN) 6 ] 2 , has been fabricated by a facile co-precipitation method at room temperature as a potential cathode material for both lithium-ion and sodium-ion batteries. It found that the Na 2 Co 3 [Fe(CN) 6 ] 2 nanoparticles with a primary particle size of 30–40 nm have been synthesized, and exhibited an excellent electrochemical performance , including a long cycling behavior in lithium-ion batteries and a good rate performance in sodium-ion batteries. In lithium-ion batteries, the Na 2 Co 3 [Fe(CN) 6 ] 2 nanoparticles cathode can deliver an excellent cyclic performance with 73.0% retention of initial capacity after 50 cycles at 50 mA g −1 . Moreover, when Na 2 Co 3 [Fe(CN) 6 ] 2 is used as cathode material of sodium-ion batteries, it exhibits an outstanding rate performance exceeding 75.2% retention of initial capacity after 50 cycles at 200 mA g −1 . Therefore, the Na 2 Co 3 [Fe(CN) 6 ] 2 nanoparticles can be a potential cathode candidate for the application of lithium-ion and sodium-ion batteries due to its excellent electrochemical performance, easy preparation, low cost and environment benefits.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Dan Wang,Hanzhu Shi,Liangjun Ma,Xue Zhou,Rongrong Zhang,Yanhong Xu,Lu Li,Lingyu Zhang,Chungang Wang
The development of novel nanozymes with excellent enzyme simulation ability provides a new perspective for antibacterial and wound healing. However, the enzyme activity of traditional simplex nanozyme is not sufficient, meanwhile the nanozymic catalytic therapy alone cannot fulfill the purpose of effective antibacterial and wound healing. Hence, we develop novel multifunctional nanocomposites composed of FeCo alloys integrate with carbon spheres and carbon nanotubes (FeCo-C/CNT NCs) with hydrophobic property, enhanced oxidase-like (OXD-like) activity and photothermal property. Remarkably, i n vitro experiment shows the the antibacterial rates of 200 μg/mL FeCo-C/CNT NCs against Staphylococcus aureus (S. aureus) and Escherichia coli ( E. coli) are as high as 83.46 % and 90.98 %, respectively. The mechanism of synergistic antibacterial effect is not only due to the reactive oxygen species (ROS) generation from FeCo alloy part of FeCo-C/CNT NCs, but also because the local high temperature generated by the photothermal effects of FeCo-C/CNT NCs under near infrared (NIR) laser irradiation, as well as heat promoted ROS production. The FeCo-C/CNT NCs under NIR laser irradiation present best wound healing via hydrophobic protection, synergistic catalytic and photothermal therapy on S. aureus -infected mice. This work introduces a novel alloy nanozyme with excellent antibacterial property, providing new idea in the field of wound healing.
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Zhiyang Yu,Yuqi Shao,Wenyao Li,Yongzhuo Liu
Integrated CO2 capture and conversion (ICCC), which simultaneously achieves CO2 enrichment and in situ conversion, represents a promising strategy for reducing CO2 emissions. Dual-function materials (DFMs) that exhibit stable and highly efficient adsorption and catalytic conversion properties are essential to the success of this strategy. In this study, we developed novel Mo/Fe-doped CaO-based DFMs for the integrated CO2 capture and reverse water–gas shift (ICCC–RWGS) process. The synthesized DFMs was evaluated through adsorption–conversion cyclic experiments in a fixed-bed reactor, complemented by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM) mapping, and X-ray photoelectron spectroscopy (XPS) characterizations. The results indicate that the generated composites with a specialized structure not only provide stable support for CaO but also regulate the RWGS process. Specifically, the formation of Ca2Fe2O5 facilitates the hydrogenation of CaCO3 via redox reactions, while the generation of CaMoO4 and Ca2FeMoO6 alleviates both the volume-change effects of CaO caused by CO2 adsorption–hydrogenation cycles and the carbon deposition side reactions caused by Fe. DFMs with a Mo/Fe mass ratio of 1:9 exhibited a CO2 capture capacity of 14.8 mmol/g DFM, a CO yield of 11.4 mmol/g DFM, and good cyclic properties at 650 °C, making it a promising DFM for ICCC–RWGS. In conclusion, the utilization of superstructures with superior redox reactivity and structural stability, such as perovskite and spinel, offers valuable insights into the design of DFMs for ICCC.
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yan Tao,Chongying Liao,Fangli He,Yixuan He,Sihui Yang,Liu-Pan Yang,Li-Li Wang
Creatine (CR) is an active compound closely associated with meat quality. However, current techniques for measuring CR in meat face challenges in achieving rapid and low-cost detection. In this study, nanozyme based on iron-doped carbon dots (Fe-LCDs) was synthesized by employing sodium lignosulfonate and iron as the precursors. Iron incorporation was crucial for significantly enhancing the peroxidase-like activity of Fe-LCDs. A cascade sensing platform was developed by integrating creatinase (CRH) and sarcosine oxidase (SOx) with Fe-LCDs. In this system, CR interacts with the catalytic framework to generate superoxide anions, which catalyzes the oxidation of 3,3′,5,5’-Tetramethylbenzidine (TMB) to produce a blue-colored product, enabling colorimetric detection of CR. Furthermore, a sensing platform compatible with smartphones was established, successfully facilitating rapid, sensitive, and visual detection of CR in meat. This research not only synthesized an effective CDs-based nanozyme but also devised a novel and promising nanoparticle-based sensing platform for CR detection.
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产品关联
DOI
PubMed
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Chonghui Zhu,Huan Wang,Zhaorui Zhang,Chenshuai Han,Huashuai Hu,Minghui Yang
Food spoilage leads to significant waste and poses serious health risks, yet real-time monitoring solutions remain limited throughout the supply chain and storage. Herein, we develop a Pt/Fe-TiN-based fuel cell gas sensor for highly sensitive and selective detection of hydrogen sulfide (H2S), a key indicator of meat spoilage. Fe doping in TiN effectively modulates the electronic structure of Pt, enhancing H2S sensitivity and mitigating humidity interference. The Pt/Fe-TiN sensor achieves a detection limit of 100 ppb and remains fully operational even at −18 °C. Compared to commercial Pt/C electrodes, it exhibits superior stability, retaining over 97% of its sensitivity after 60 days under high humidity. Furthermore, a real-time H2S monitoring device integrated with a smartphone interface was developed for continuous spoilage detection in meat storage. This work provides a practical, real-time sensing platform for food safety monitoring, contributing to reduced waste and improved supply chain transparency.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Chengwu Zhang,Anqi Yang,Bing Qin,Wei Zhao,Chuipeng Kong,Chuanyu Qin
It has been reported that tripolyphosphate (TPP) can effectively enhance the activation of O 2 by Fe(II) to remove organic pollutants in the environment. However, the influence of solution pH on the generation and conversion of reactive oxygen species (ROS) and their degradation of pollutants in the Fe(II)/O 2 /TPP system needs further investigation. In this study, we demonstrated that O 2 •– and •OH were the main ROS responsible for degradation in the system at different pH conditions, and their formation rates were calculated using a steady-state model. Experiments combined with density functional theory (DFT) calculations showed that the p -nitrophenol (PNP) degradation pathway in the Fe(II)/O 2 /TPP system is regulated by solution pH. Specifically, at pH = 3, the existence of Fe(II) in the solution is dominated by [Fe(II)(HTPP) 2 ] 2− , which leads to a rapid conversion from O 2 and HO 2 • to generate •OH, and PNP is primarily oxidatively degraded. However, at pH = 5/7, [Fe(II)(TPP) 2 ] 4− is taking the lead with which O 2 •– is accumulated in the solution due to the slow conversion to •OH in this condition, and the PNP is mainly reductively degraded. This study proposes a new strategy to achieve the targeted oxidative/reductive removal of different types of pollutants by simply varying the solution pH in the Fe(II)/O 2 /TPP system.
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PubMed
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Shaorong An,Lina Wang,Qiang Jin
The Fe-N-C catalysts featuring abundant FeNx sites activating peroxymonosulfate (PMS) have been considered an attractive approach to water treatment and purification. It was reported that the coordination numbers of FeNx could be precisely controlled by varying the pyrolysis temperature, thereby affecting the catalytic activity . However, almost all Fe-N-C catalysts were prepared through energy-consuming high-temperature pyrolysis strategies, the activation performance and mechanism under low-temperature pyrolysis conditions are still unclear. In this work, three single-atom Fe catalysts (Fe SA -NC-300/500/1000) based on ZIF-8 were synthesized at different pyrolysis temperatures. Results showed that the degradation efficiency of sulfamethoxazole (SMX) in the Fe SA -NC-500/PMS and Fe SA -NC-1000/PMS systems could reach 100 % within 30 min, while only 91.9 % in the Fe SA -NC-300/PMS system. Combined with the turnover frequency (TOF) of the catalysts, it was found that the catalytic activity of Fe SA -NC-500 prepared by low-temperature pyrolysis was close to that of Fe SA -NC-1000, which was superior to many reported Fenton-like catalysts. Mechanism analysis manifested that both radical (·OH, SO 4 − ·, and ·O 2 − ) and nonradical ( 1 O 2 , high-valent Fe-oxo species, and electron transfer) pathways coexisted in the Fe SA -NC/PMS systems. Impressively, the larger production intensity of reactive species occurred in Fe SA -NC-500/PMS and Fe SA -NC-1000/PMS systems. The difference between these Fe SA -NC catalysts in actual printing and dyeing wastewater treatment offered some guidance for wider environmental applications. This work also provided a direction on the design and understanding of green and energy-saving Fe-N-C catalysts.
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