Small
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2025
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IF 12.1
Pengwei Tan,Shuyang Shen,Ying Zheng,Yushu Tang,Yuanyuan Luo,Zheng Zhang,Dong Men,Guotao Duan
Electrochemical transistor (ECT) biosensors can achieve ultrahigh sensitivity, while keeping challenges for large biomolecules due to their sizes over the thickness of the electric double layer (EDL) causing a failure of sensing reaction. Here, wafer-level Ni/Fe-metal-organic framework (MOF) films and corresponding ECT biosensors are fabricated for the detection of coronavirus nucleocapsid protein, which realize an ultralow detection limit of 1 fg mL −1 and a wide detection range of 1 fg mL −1 to 100 pg mL −1 . A 3D Debye space, originating from the unique stacking structure of nanosheets and nanoparticles in Ni/Fe-MOF film, is proposed to explain such ultrahigh sensitivity, which ensures the immune-binding and sensing process of the nucleocapsid protein large molecules located in the effective EDL space. Moreover, an appropriate Ni/Fe molar ratio is optimized to enhance the transmission of carriers, thus improving the signal-to-noise ratio and the sensing response. The Ni/Fe-MOF-ECT biosensors will find applications in highly sensitive detection for large biomolecules, and the 3D Debye space may be a design model for constructing other biosensors.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Jianwang Wu,Mei Lin,Ming Liu,Zuliang Chen
Hydrogen peroxide (H 2 O 2 ) is a crucial eco-friendly oxidizer with increasing demand due to its wide range of applications. Activating O 2 with catalysts to generate H 2 O 2 on-site offers a promising alternative to traditional production methods. Here, we design unique crystalline/amorphous heterophase Fe-Mn core–shell chains (ZVI-Mn) for efficient on-site generation of H 2 O 2 and manipulation of subsequent H 2 O 2 activation. The yield of H 2 O 2 on-site produced by ZVI-Mn in water within 5 min was 103.7 mg·L -1 , which was much greater than that of zero-valent iron (ZVI) and amorphous Mn (A-Mn) (0 and 42.5 mg·L -1 ). Raman and density functional theory (DFT) calculations confirmed that *OOH is the key species involved in the on-site generation of H 2 O 2 . Electrochemical tests confirmed the excellent electron-transferring ability, while electron paramagnetic resonance (EPR) revealed oxygen vacancy defects in the catalysts, which proved to be conducive to improving the catalytic activity of ZVI-Mn. Additionally, by regulating the pH of aqueous solution , ZVI-Mn can simultaneously achieve efficient on-site generation of H 2 O 2 and in-situ removal of enrofloxacin from aqueous solution.
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PubMed
高影响因子
POLYMER ENGINEERING AND SCIENCE
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2024
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IF 3.2
Wenlong Ma,Tianxu Hao,Xinya Wang,Wei Zhang,Yonggui Li,Mingxing Chen
In this paper, a high-performance composite nanofiber membrane with excellent air filtration and dye degradation properties was prepared by incorporating MIL-53(Fe) nanoparticles into the electrospinning solution. The results showed that the filtration efficiency for PM2.5 of the PP/PVDF-HFP/MIL-53(Fe) composite nanofiber membrane reached up to 99.3% with the addition of 2 wt% MIL-53(Fe). Moreover, the composite nanofiber membrane exhibited steady filtration efficiency across different parameters, including air velocity, PM2.5 concentration, and extended testing time. Furthermore, the incorporation of MIL-53(Fe) significantly enhanced the removal efficiency of the composite nanofiber membrane toward Rh B, resulting in a remarkable 91% removal rate. The polymer/MOF composite nanofiber membranes prepared by simple and cheap electrospinning technology have a wide range of practical applications in the field of environmental protection. Highlights PPM composite nanofiber membrane was prepared via electrospinning method. MIL-53(Fe) nanoparticles were introduced to PPM composite nanofiber membrane. PPM composite nanofiber membrane showed excellent removal efficiency for PM2.5. PPM composite nanofiber showed a good removal performance for RhB in solution.
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高影响因子
Surfaces and Interfaces
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2024
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IF 5.7
Qian Cheng,Xiaohan Liu,Chuhan Huang,Hongman Sun,Fazle Subhan,Xinyi Zhou,Yuankai Liu,JiaHui Yang,Qi Li,Youhe Wang,Zifeng Yan
Recently, there has been a growing interest in the fundamental understanding of the mechanism of how MIL-101(Fe)/g-C 3 N 4 heterojunctions facilitate the occurrence of photocatalytic nitrogen fixation reactions, especially the electron transfer mechanism has attained increasing attention in photocatalysis. Herein, we implemented a "triple win scenario" strategy to fabricate the S-scheme MIL-101(Fe)/g-C 3 N 4 heterojunction through a straightforward solvothermal process. The MC-6 heterojunction minimizes the recombination of photogenerated carriers, enhances light utilization efficiency, and activates the N≡N bond, thus boosting photocatalytic nitrogen fixation efficiency. The transition metal iron activates the N≡N bond, while S-scheme heterojunctions reduce the photogenerated carrier recombination. In addition, the decrease in band gap (E g ) leads to an increase in visible light utilization efficiency. ISIXPS proved the mechanism of interelectron transfer of MIL-101(Fe)/g-C 3 N 4 heterojunction under illumination. Upon the creation of the heterojunction, electrons migrate from g-C 3 N 4 to MIL-101(Fe), establishing an inherent electric field due to the disparate Fermi levels between the two materials. The electrons (e - ) on the g-C 3 N 4 CB with a more negative reduction potential and the holes ( h + ) on the MIL-101(Fe) VB are retained, which increased the redox capacity to a great extent required for the reduction of N 2 to NH 3 . The ammonia production efficiency of MC-6 photocatalyst was 160 µmol g cat -1 h -1 , representing an 8-fold and 2.8-fold improvement over pristine g-C 3 N 4 (20 µmol g cat -1 h -1 ) and MIL-101(Fe) (57 µmol g cat -1 h -1 ), respectively.
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高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Meirong Dong,Junchang Xiong,Hongchuan Liu,Zehua Huang,Huaming Hou,Youcai Liang,Jidong Lu
Fe-based oxygen carriers are regarded as a promising class of oxygen carriers in the field of chemical looping combustion. However, the elucidation of the detailed microscopic reaction mechanism of oxygen carriers remains a significant challenge. In this work, we combine in situ spectroscopy, density-functional theory (DFT) calculations, and micro-kinetic modelling to reveal the microscopic reaction mechanism of CH 4 combustion on α-Fe 2 O 3 . The macroscopic reaction characterization of hematite with CH 4 was carried out on a fixed bed, and gas chromatography (GC) was utilized to detect the combustion products (CO 2 , H 2 O and H 2 ). Subsequently, in situ spectroscopy and DFT were combined to reveal the detailed pathways for the CH₄ oxidation process. The results indicated that the reaction intermediates evolve from methoxy (CH 3 O*) to the bridged bidentate formate (b-HCOO*) to the monodentate formate (m-HCOO*), which ultimately leads to the formation of CO 2 through a combination of H transfer and lattice oxygen oxidation. A micro-kinetic model was developed which incorporates surface reaction with the oxygen transport. This revealed that CH 3 O* and CH 3 O* → CH 2 OO* are the key intermediates and radical reactions, respectively, for CO 2 production. The elucidation of the reaction mechanism may prove beneficial for the future development of novel Fe-based oxygen carriers.
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高影响因子
Environmental Technology & Innovation
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2024
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IF 6.7
Binbin Wu,Zheng Wang,Yannan Jia,Nannan Xu,Lisha Liao,Chenyue Zhang,Zhiwei Wang,Yuanxiang Shan,Wanting Feng,Hongqin Xue
Biochar loaded with bimetallic Fe/Mo (Fe/Mo-BC) was prepared as a cost-effective catalyst for the degradation of organic matter by activated peroxydisulfate, in which MoO 2 was used as a co-catalyst to enhance Fe 2+ /Fe 3+ cycling. The tetracycline-degradation efficiency of the system reached 74.49 % within 10 min, and it showed high removal rates over a wide pH range (3–9). Quenching experiments and electron paramagnetic resonance analyses showed that 1 O 2 , •OH, O 2 • - , and SO 4 • − produced by the Fe/Mo-BC/PDS system are involved in tetracycline degradation, with 1 O 2 and •OH being the dominant active substances. X-ray photoelectron spectroscopy analysis revealed that Mo(IV) reduces Fe 3+ to Fe 2+ and oxidizes itself to Mo(VI). In addition, the Fe/Mo-BC remained stable and could be recycled three times, indicating the feasibility of this system for practical applications. The possible pathways of TC degradation by this system were investigated by LC-MS and DFT calculations. Thus, the present study provides a feasible strategy for the use of biochar-loaded bimetallic materials and PDS for the degradation of organic matter.
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高影响因子
Chemistry-An Asian Journal
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2024
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IF 3.5
Lijuan Ma,Han Wang,Jing Zang,Xinna Wang,Hao Li,Yanwei Li,Yanhui Li
The rational design of efficient, stable, low-cost non-precious metal-based electrocatalysts with enhanced oxygen reduction reaction (ORR) activity has attracted widespread attention. In this study, a novel electrocatalyst, Fe/Co-N-MWCNT, was prepared by in-situ growth of ZIF-8 and Fe/Co-Phen on multi-walled carbon nanotubes (MWCNTs), then pyrolysis under different temperature to obtain optimal one. During the pyrolysis process, the incorporation of Fe and Co facilitated the formation of metal active sites and Fe-Co alloy, thereby promoting electron transfer and enhancing the ORR activity. Compared to Pt/C (E1/2 = 0.854V, JL = 4.90 mA cm-2), Fe/Co-N-MWCNT demonstrated a comparable half-wave potential (E1/2 = 0.812V) and an enhanced limiting current density (JL = 5.37 mA cm-2). Furthermore, Fe/Co-N-MWCNT was stable and showed no significant change after 2000 cycles, with only a negative shift of 7 mV in E1/2. Ampere response testing revealed that the current decay of Fe/Co-N-MWCNT after 10000 s was only about 7.8%, while that of Pt/C was about 18.4%. Due to its excellent catalytic stability, Fe/Co-N-MWCNT was demonstrated to be an excellent candidate for rechargeable zinc-air batteries. The outstanding electrocatalytic performance of Fe/Co-N-MWCNT can be attributed to its high pyridinic nitrogen content, the unique structure and abundant metal active sites.
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高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Palanisamy Vasudhevan,Luo Shuhao,Zhang Ruoyu,Velu Manikandan,Dong Yu,Sandhanasamy Devanesan,Prakash Kumar Sarangi,Hui Ma,Saurav Dixit,Shengyan Pu
Chlorinated aromatic compounds are extremely dangerous, transmittable, and bioaccumulative. Ferrous-based persulfate stimulation methods are a potential approach for soil restoration, however they have limitations with ferrous accumulation. Citrate (CA) and ethylenediaminetetraacetic acid (EDTA) were used in the current investigation to enhance the efficiency of Fe(II)-activated persulfate (PS) reactions in the decomposition of 4-chlorophenol (4-CP) and 3-chlorobenzoic acid (3-CB) in soil. The combination of organic ligands with Fe(II) increased the overall iron content in the organic ligands/Fe(II)/PS systems and inhibited Fe(II) accumulation. Organic ligands absorbed Fe oxides in soil and facilitated to stimulate persulfate. The optimal concentration of organic ligands/Fe(II)/PS is 50:50:50, and around 74.11%, 70.05%, and 77.67%, 72.92% of the 4-CP and 3-CB were decomposed within 30 minutes, in contrast to 34.14% and 38.14% in the Fe(II)/PS system. The degradation percentage of 4-CP and 3-CB raised with increasing PS and Fe(II) levels, whereas high PS and Fe(II) concentrations prevented 4-CP and 3-CB degradation, most likely because of sulfate radical absorption. Furthermore, the 4-CP and 3-CB decomposition mediated by the citrate/Fe(II)/PS and EDTA/Fe(II)/PS systems were effective over a wide range of pH values (2.0–10). The organic ligands combined with Fe(II) catalyzed PS degradation showed a strong ability on enduring the effects of HCO3, Cl, and HA anions in soil on 4-CP and 3-CB decontamination. In addition, SO4 •- and OH • produced from citrate/Fe(II)/PS and EDTA/Fe(II)/PS systems were identified as the primary reactive oxygen species for 4-CP and 3-CB degradation. In conclusion, the organic ligands coupled with Fe(II) stimulated PS activation are potentially useful technique for the restoration of 4-CP and 3-CB contaminated soils.
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高影响因子
WATER RESEARCH
·
2025
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IF 12.4
Yang Wang,Ziyuan Huang,Zhang Yan,Zhenchao Lei,Huanxin Ma,Chunhua Feng
Acid mine drainage (AMD) is characterized by high concentrations of Fe(II) and Fe(III), which can be harnessed for the in-situ formation of schwertmannite, enabling the efficient immobilization of toxic heavy metals. However, existing biological and chemical methods for schwertmannite synthesis face significant challenges, including low Fe(II) oxidation rates and particularly limited Fe(III) precipitation efficiency in acidic environments. In this study, we develop a visible light-assisted photo-electrochemical (PEC) system that effectively overcomes these barriers. By leveraging anodically evolved O 2 and cathodically generated OH − , we achieved facile Fe(II) oxidation at pH 3.0, and an impressive Fe(III) precipitation efficiency of 82.8 %, significantly exceeding the < 30 % efficiency reported by other methods. Mössbauer spectroscopy and X-ray diffraction confirmed that the generated minerals are high-purity schwertmannite. Experimental and theoretical analyses revealed that in the presence of cathodic alkalinity, Fe(III) undergoes further hydrolysis to form [(H₂O) 3 Fe(OH) 2 (SO 4 )] − species, which are thermodynamically capable of spontaneous polymerization and mineralization. Furthermore, the photoreduction of [(H₂O) 4 Fe(SO 4 ) 2 ] − within the PEC system, followed by subsequent oxidation, plays a crucial role in facilitating Fe(III) mineralization. The PEC system also effectively transformed As(III) to As(V) and Cr(VI) to Cr(III) in AMD, promoting their immobilization in the resultant schwertmannite.
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高影响因子
ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Kelong Ao,Dawei Li,Yixin Yao,Pengfei Lv,Yibing Cai,Qufu Wei
Heteroatom doping is a feasible approach to adjust catalytic performance of the HER catalysts. In this work, we report a design of Fe-doped Co 9 S 8 nanosheets grown on carbon cloth (Fe-Co 9 S 8 NSs/CC) as a hydrophilic 3D monolithic electrocatalyst for efficient hydrogen evolution under all pH. The water contact angle and electrochemical measurements proved that the resultant material was hydrophilic for its nano hierarchitectures and dopant Fe enhanced the catalytic capability of singular Co 9 S 8 . In 1.0 M KOH, the Fe-Co 9 S 8 NSs/CC possessed a relatively small Tafel slope (95.3 mV dec −1 ) and required the overpotential of 83 mV to achieve 10 mA cm −2 . To drive the same current density, the overpotentials were 65 and 192 mV in 0.5 M H 2 SO 4 and 1.0 M PBS, respectively. Meanwhile, it showed good cycle stability and durability over 20 h static test at alkaline and neutral condition. The flexible freestanding catalyst has great potential in practical applications.
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2018
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IF 3.956
Ting Lu,Yucui Hou,Weize Wu,Muge Niu,Wei Li,Shuhang Ren
Carboxylic acids are considered as an important group of chemicals. Direct conversion of cellulose to formic acid (FA) by vanadium(V(V))-contained catalyst is of significant conceptual and practical interest. A second metal (from Mg(II), Ca(II), Al(III), Cr(III), Mo(VI), Mn(II), Cu(II), or Fe(III)) incorporated into V(V)-contained catalyst system was screened to further improve the oxidation of cellulose by O 2 to yield FA. Fe(III) exhibited the best performance and effects of reaction parameters on the conversion of cellulose in NaVO 3 -FeCl 3 -H 2 SO 4 aqueous solution were investigated. Cellulose could be rapidly converted, and the yield of FA (66.8%) was higher than that obtained by the single use of FeCl 3 (48.4%) or NaVO 3 (57.6%). The conversion of cellulose in another V(V)-contained catalyst system (H 5 PV 2 Mo 10 O 40 ) was explored to verify the universal enhancement of FeCl 3 . Influences of the second metal Fe(III) on the V(V)-contained catalyst system and mechanism of cellulose oxidation in the V(V)-Fe(III)-H 2 SO 4 system were studied. Compared with single use of V(V), the employment of Fe(III) alone is not active enough in the oxidative C C bond cleavage . V(V) other than Fe(III) is the main active species for selective oxidation of substrates. The incorporation of Fe(III) and V(V) shows both synergistic and competitive relationships. Both the synergistic and competitive effects are beneficial to increase FA yield, as they promote the oxidation of V(IV) to V(V), increase oxidative ability, and inhibit the overoxidation to by-product CO 2 . The catalyst system was reused four times without decline in activity.
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高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Liyan Wang,Zhaokun Wang,Liang Chu,Mu Yang,Ge Wang
The design of transition metal nitrides with excellent oxygen evolution reaction and 5-hydroxymethylfurfural oxidation reaction (HMFOR) is of great significance to achieve the goal of "carbon peaking and carbon neutrality". Herein, Fe-doped bimetallic nitride Fe x Co 1-x ) 4 N was prepared by a simple electron regulation strategy. The introduction of Fe changes the electronic structure of Co and optimizes the adsorption energies of *OH, reduces the potential barrier for the generation of *OOH as a potential-determining step and thus increases the intrinsic OER activity of Co 4 N. In addition, Fe substitution of some of the Co atoms gives (Fe x Co 1-x ) 4 N a higher electrochemical active surface area, which accelerates the electron transfer efficiency and improves the electrical conductivity. The overpotential for (Fe x Co 1-x ) 4 N-0.9 to reach a current density of 10 mA cm −2 in 1 M KOH is only 271 mV. When in 1 M KOH + 50 mM HMF condition, (Fe x Co 1-x ) 4 N-0.9 requires only 1.37 V to reach a current density of 10 mA cm −2 . This work provides practical guidance for developing bifunctional transition metal electrocatalysts with excellent OER and HMFOR activity.
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高影响因子
危险品化学品经营许可证（带存储）