JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 7
·077512
·
IF 4.386
Wenhuang Xiao,Xiaolin Zhao,Luyin Lin,Jian Luo,Haipeng Yang
Sarcosine has been discovered as a better potential biomarker for Prostate cancer (PCa). Though many high-performance amperometric sarcosine biosensors have been reported, it is still difficult to accurately detect sarcosine because of the extremely low concentration and the presence of many electroactive interferents in human serum or urine. Since most of the reported sarcosine biosensors use platinum group metals (PGM) as catalysts, it is meaningful to explore other catalysts with higher catalytic activity. Metal-nitrogen-doped carbon (M–N–C) materials are considered as alternatives to precious metals. In this study, iron doped zeolitic-imidazolate-framework-8 (ZIF-8) composites were synthesized and calcined to obtain an Iron-nitrogen-doped Carbon (Fe–N–C) material, which has excellent catalytic activity. The sensitivity of the Fe–N–C modified sarcosine biosensor is 16.5 μA mM−1, (234.2 μA mM−1 cm−2), which is the highest one in recent reported works. It has a low limit of detection (LOD, 0.7 μM, S/N = 3), and an appropriate linear detection range of 2–37 μM. This work provides a new approach to prepare high performance sarcosine biosensors by improving the catalytic activity of the modifier of the sensor. It has great potential to be used as portable devices for the rapid detection of PCa.
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2019
·
IF 4.63
Peng Wu,Jiaqiang Sun,Mohamed Abbas,Pengfei Wang,Yilong Chen,Jiangang Chen
Hydrophobic SiO 2 -supported Fe-Ni bimetallic catalysts were synthesized by facile hydrothermal method, followed by grind-mixing process. The as-synthesized nanoparticles were appointed as robust catalysts in the methanation process to improve the calorific value of the natural gas. Notably, the functionalization of SiO 2 surface with a hydrophobic layer was performed using a fluorinated alkyl group, as a critical step to prohibit the water-gas shift (WGS) reaction and consequently produce low amount of CO 2 content during the methanation process. The obtained catalytic results demonstrated that Fe 1.5 Ni 1.5 catalyst exhibited an excellent CO conversion of 95.2% at 320 °C with a natural gas calorific value of 56.4 MJ Nm −3 , which is much higher than the previously reported results when traditional Ni-based catalysts used. Moreover, the modified hydrophobic catalyst exhibited a lower CO 2 selectivity compared with unmodified one. This study provides a new and promising insight for the design and development of high-calorie SNG product.
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高影响因子
ACS ES&T Engineering
·
2022
·
IF 0
Ting Zhang,Zhelun Pan,Dinggui Song,Hong Huang,Jiang Yu,Yichan Wen,Junlin Lu,Zhenfeng Bian,Xufang Qian
The high reactivity of Fe(0) with Cr(VI) makes it the best choice for Cr(VI) removal. Interstitial compound Fe3C was produced during the carbothermic reduction of mesoporous phenolic resin/ferric ions to form Fe(0)/Fe3C nanoparticles embedded in mesoporous carbon (Fe(0)/Fe3C@MesoC). Fe3C accelerates the electrochemical corrosion process of α-Fe(0) in solution, and the positive/negative equipotential interface that is formed by iron–carbon (Fe–C) microelectrolysis of Fe(0)/Fe3C@MesoC induces the capture of Cr(VI) anions and Cr(III) cations as a result of this process. Cr(VI) was completely reduced to Cr(III) by the Fe(0)/Fe3C@MesoC catalyst with a high electron efficiency (40.5%) relative to nanosized zero-valent iron (1.9%) and Fe@MesoC (32.7%). Surface ferrous ions are the principal reactive species responsible for Cr(VI) reduction (at least 64%); Fe(0)/Fe3C and undetectable surface ferrous ions account for a small part of Cr(VI) reduction (around 28%), and only 8% of Cr(VI) ions are reduced by active hydrogen (H*). The proposed structure of Fe(0)/Fe3C@MesoC provides new insight into iron–carbon material preparation and application in in situ chemical reduction.
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Frontiers of Environmental Science & Engineering
·
2025
·Vol. 19
·期 12
·1-17
·
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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高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
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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高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2023
·Vol. 148
·期 21
·12049-12057
·
IF 4.4
Zhang Ming,Zhao Fengqi,Jiang Yifan,Li Na,Li Hui,An Ting,Qin Zhao,Jiang Zhoufeng
Various graphene-salen iron nanocomplex S-551-Fe, S-602-Fe, S-902-Fe, S-590-Fe, S-792-Fe and S-550-Fe were successfully synthesized using different coupling agents. The microstructure, composition and structure of the prepared graphene-salen iron nanocomplex were characterized by SEM, EDS, FTIR, XPS and RAMAN routes. The results showed the successful fabrication of graphene-salen iron nanocomplex and their two-dimensional structure. In addition, the catalytic property of the graphene-salen iron nanocomplex on the pyrolysis property of TKX-50 was investigated via DSC method, and the kinetic data was calculated by linear and nonlinear models. The positive effects of the synthesized graphene-salen iron nanocomplex for TKX-50 pyrolysis were confirmed, and the impact on the second pyrolysis procedure of TKX-50 is more significant. Among the nanocomplex considered, the S-551-Fe has better catalytic property for TKX-50 pyrolysis, and the activation energy ( E a ) of TKX-50 decreased from 163.50 to 135.55 kJ·mol −1 in the conversion degree of 0.2 ~ 0.8. In addition, the catalytic mechanism of preferred S-551-Fe for TKX-50 pyrolysis was disclosed via in situ FTIR and gas phase MS methods. This study is helpful to the precise design of graphene iron coordination catalysts and the disclosure of their catalytic mechanism for TKX-50 pyrolysis.
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高影响因子
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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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
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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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xin Yang,Lu Yao,Yu Wang,Xinran Zhang,Pengfei Ren
Algae blooms can clog filtration tank, release toxic cyanotoxin and produce undesirable disinfection byproducts (DBPs) in post-chlorination, which brings challenges to conventional water treatment processes. In this study, peroxymonosulfate (PMS) was tested for its ability to improve Fe(III) coagulation of Microcystis aeruginosa in water treatment. Compared with conventional Fe(III) coagulation, the presence of PMS resulted in the formation of larger floc and thus better algae and turbidity removal. The removal of algae by PMS-enhanced Fe(III) coagulation (PMS-Fe(III)) process reached 97.5% at 1 mM PMS, which was 1.5 times higher than that by Fe(III) coagulation alone. The oxidization of surface-adsorbed extracellular organic matter destabilized the algal cells and enhanced their coagulation without greatly damaging the cells’ integrity. Simultaneously, about 80% of Microcystin-LR, a cyanotoxin, was degraded in the enhanced process. Moreover, the formation of DBPs and their associated toxicity during the subsequent chlorination were decreased by 49.2% and 13.6%, respectively. The production of trihalomethanes, haloacetic acids and haloacetronitriles was particularly abated. SO 4 •- and HO • , which were formed from PMS activation through redox cycling of Fe mediated by the existing natural organic matter, were mainly responsible for algae removal. The results indicate that supplementing Fe(III) coagulation with PMS is a promising option for treating water during algal blooms.
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DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Mingyang Xiong,Yao Zeng,Ruisi Qiu,Hongxing He,Yi Zhang,Zhifeng Nie,Bing Wang
Bisphenol A (BPA) is extensively utilized as an industrial chemical in the production of certain plastics and epoxy resins. They are frequently found in environmental water and have the potential to cause risks to both the environment and human health. To efficiently remove the endocrine disruptor BPA from aqueous solutions, sea urchin-like magnetic material Fe3O4@PDA@NH2-MIL-101 (Fe) was synthesized via hydrothermal methods. Fe3O4@PDA@NH2-MIL-101 (Fe) has excellent adsorption performance, with a theoretical maximum adsorption capacity of 300.47 mg/g for BPA. The adsorption kinetics of BPA by Fe3O4@PDA@NH2-MIL-101 (Fe) followed the pseudo-second-order kinetic model and Liu’s isotherm model. Magnetic separation experiments reveal a high recovery efficiency, maintaining 94.82% of its initial adsorption capacity after five cycles. The primary adsorption mechanisms of Fe3O4@PDA@NH2-MIL-101 (Fe) on BPA included pore filling, hydrogen bonding, π–π interaction, and Lewis acid–base interaction. Additionally, the material showed excellent removal performance of BPA, with a maximum adsorbed amount of 135.27 mg/g for total organic carbon (TOC) in the shale gas fracturing flowback fluid. These findings suggest that Fe3O4@PDA@NH2-MIL-101 (Fe) holds significant potential as an adsorbent for BPA removal from actual wastewater, offering promising prospects for practical applications.
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产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Qinbo Cao,Yan Yan,Heng Zou,Haiyu Zhang,Dianwen Liu,Shuming Wen
The S 2 O 8 2− /Fe 2+ system can be used to depress PbS, where the activation of S 2 O 8 2− leads to the generation of SO 4 • − radicals that oxidize PbS. However, a high S 2 O 8 2− /Fe 2+ dosage is needed for PbS depression (0.15 mol/L). In this study, ultrasonication was employed to improve the depression ability of S 2 O 8 2− /Fe 2+ . The flotation and contact angle results implied that 120-kHz ultrasonication enhanced the depression ability of S 2 O 8 2− /Fe 2+ for PbS, resulting in a decrease in the S 2 O 8 2− /Fe 2+ dosage. Ultrasonication induced hot spots (5000 K) in the PbS slurry and on the PbS surface. These hot spots may cause the thermal activation of S 2 O 8 2− to generate SO 4 • − radicals, facilitating the oxidation of PbS. Thus, the ultrasound-assisted treatment increased the oxidation level of PbS. The XPS study revealed that ultrasonication favored the oxidation of S 2− on the PbS surface to SO 4 2− , such that the surface was covered with PbSO 4 and the hydrophobicity of PbS was lowered. However, ultrasonication did not considerably increase the oxidation state of the CuFeS 2 surface; thus, CuFeS 2 could still be floated and separated from PbS. This study provides a novel strategy for separating PbS–CuFeS 2 mixtures.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jianyue Yan,Peng Liu,Jiawen Li,Hao Huang,Shengfu Tong,Wenbo Song
The electrocatalytic nitrate reduction reaction to ammonia (NRA) offers a promising alternative to traditional ammonia synthesis methods. In nature, enzymes containing molybdenum and iron sites catalyze the reduction of nitrate and nitrite ions. Drawing inspiration from these enzymes, we synthesized a carbon-coated nano-octahedra of FeMo-based nitride (FeMoN@C NO) by pyrolyzing phosphomolybdic acid hydrate (POM) doped Fe-NH 2 -MIL-101 to catalyze NRA. Experimental results demonstrate that in an alkaline environment, FeMoN@C NO exhibits a suitable hydrogen evolution reaction (HER) capacity, and the protons or hydroxyls produced effectively facilitate the hydrogenation reaction in the ammonia synthesis process. Additionally, the introduction of Mo increases the number of active sites and effectively reduces the thermodynamic barrier in NRA, thereby enhancing the rate of ammonia synthesis. As a result, FeMoN@C NO displays outstanding NH 3 Faradaic efficiency (FE) of 98.2 % and an NH 3 yield of 434.16 µmol/h cm −2 . Building upon the excellent electrocatalytic properties of FeMoN@C NO, a new Zn-nitrate battery system is assembled in this work, which exhibits an outstanding peak power density of 3.23 mW cm −2 and an FE of 91.58 % for NH 3 production. This work provides a new perspective for designing enzyme-mimicking nitrate reduction catalysts and broadens the application of Zn-based batteries.
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高影响因子
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