ACS Applied Nano Materials
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2024
·
IF 5.3
Linlin Zheng,Xuechuan Lv,Yanan Chen,Bingyu Wei,Wanqing Hao,Ziyi Zhang,Jingru Yang,Ruiyu Liu,Xu Zhu,Yanli Zhou,Maotian Xu,Xiaohan Gao,Hui Dong
The iron-based metal–organic framework (NH2-MIL-101(Fe)) nanoparticles exhibited excellent conductivity, exceptional catalytic effect, sturdy stability flexible structure, etc. Consequently, it has been exploited in various applications. Herein, NH2-MIL-101(Fe) nanoparticles were successfully synthesized via the hydrothermal method and were grown in situ onto the pencil core electrode (PCE) for simultaneous determination of caffeic acid (CA) and acetaminophen (AP). The PCE decorated by NH2-MIL-101(Fe) as electrode substrate, combined with the dual effects of the excellent electrocatalytic activity of NH2-MIL-101(Fe) and the commendable electrical conductivity of PCE, the constructed sensor exhibits superior electrochemical sensing activity. The electrochemical behavior of CA and AP at the electrodes were investigated mainly by differential pulse voltammetry (DPV) and cyclic voltammetry (CV), exhibiting broad linear responses from 0.1 to 500 μM, and 0.08 to 800 μM for simultaneous detection of CA and AP, with detection limits of 29 nM and 24 nM, respectively. Moreover, the results of CA and AP in drug and human urine using this sensor were satisfactory, which proved that the sensor is feasible to simultaneously detect CA and AP.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2024
·
IF 2.5
Li Liu,Jingshuai Wang,Xingyi Wu,Hui Kong,Rui Wang,Zhaoyang Wu
Herein, the composite powder with a core–shell heterostructure (Fe–Si–Cr magnetic particles as the core and ZnSO 4 as the shell) was synthesized using hydrothermal method, and Fe–Si–Cr-based soft magnetic composites (SMCs) with an insulation layer of ZnO·SiO 2 ·Cr 2 O 3 (ZSC) composites were successfully prepared via powder heat treatment and cold pressing. The formation mechanism of the ZSC composite insulation layer was thoroughly investigated, and the impact of varying amounts of ZnSO 4 on the Fe-Si-Cr/ZSC SMCs’ microstructure and magnetic properties was analyzed. ZnSO 4 released oxygen during thermal decomposition and oxidation reaction occurred at the core–shell heterogeneous interface, forming ZSC composite insulation layer. The incorporation of ZnSO 4 significantly influenced the homogeneity and thickness of the composite insulation layer, effectively modulating the magnetic properties of Fe–Si–Cr/ZSC SMCs. This SMCs had the best magnetic properties after the addition of 2 wt% ZnSO 4 . Under 10 mT and 300 kHz, the relative permeability was 37.7, with a total loss of 248.8 kW/m 3 The method proposed in this study is beneficial for facilitating the advancement of SMCs towards high frequency and further optimizing its performance.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Tianhao Yu,Peng Gao,Yu Wang,Maidina Muhetaer,Hong Du
In response to the limitations of slow reaction kinetics and elevated overpotentials in the OER, a novel core–shell structured electrocatalyst, termed NiCo–ZIF-67@Fe–Co–Ni-PBA or NiCo–ZIF@PBA, has been developed. This material demonstrates exceptional catalytic performance, exhibiting a minimal overpotential of approximately 188 mV at 10 mA cm–2, alongside a Tafel slope of 109 mV dec–1. Its robust stability in a 1 M KOH solution during the OER operations is noteworthy. Theoretical insights from DFT calculations reveal that a Co–O–Fe bridging configuration within NiCo–ZIF@PBA lowers the energy barrier for the reaction to 1.79 eV, a significant reduction from 2.67 eV observed with NiCo–ZIF-67. The improvement in electrochemical performance is primarily due to the emergence of Co3+ ions, which results from the efficient charge transfer occurring at the interface of the PBA and NiCo–ZIF core–shell structure. These findings suggest a promising strategy for designing advanced core–shell materials for electrocatalytic applications.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 16
·7197-7204
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IF 2.7
Han Zhang,Xiaodan Qi,Zhifei Wang,Lihua Jin,Yehua Shen
The exploration of efficient, easily fabricated and inexpensive carbon-based nanozymes with accessible active sites is important for expanding the applications of nanozymes. In this study, an Fe and N co-decorated porous carbon framework (Fe–N–C) derived from walnut shells was designed and prepared by microenvironment modulation consisting of chemical activation and pore-making engineering. The hierarchical pore size distribution not only can increase the exposure of defects and provide a suitable environment for the favorable incorporation of Fe–Nx active sites into carbon matrixes, but also can provide a higher specific surface area to facilitate substrate binding. For these reasons, the prepared Fe–N–C material was found to possess excellent oxidase-like activity, which could catalyze the activation of dissolved oxygen to produce reactive oxygen species (ROS) to oxidize chromogenic substrates. Interestingly, this oxidase mimic behavior would be effectively suppressed by an antioxidant – hydroquinone (HQ). Based on this observation, we proposed a sensitive and visible colorimetric platform for HQ assay, with a detection limit of 0.09 μM. This research not only provides new ideas for the preparation of economical carbon-based nanozymes, but also further expands the application of biomass-based carbon materials as nanozymes in the field of environmental pollutant detection.
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JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2011
·Vol. 49
·期 13
·2916-2923
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IF 3.894
Delong Liu,Hou Chen,Ping Yin,Naiyi Ji,Guangxi Zong,Rongjun Qu
Fe(0) was firstly used as single-electron transfer-living radical polymerization catalyst for acrylonitrile polymerization using carbon tetrachloride as initiator, hexamethylenetetramine as N-ligand, and N , N -dimethylformamide as the solvent at 65 °C. First-order kinetic studies indicated that this polymerization proceeded in a “living”/controlled manner. The living nature of the polymerization was also confirmed by chain extension of methyl methacrylate with polyacrylonitrile (PAN) as macroinitiator. Furthermore, PAN was modified with NH 2 OH·HCl to generate amidoxime groups for extraction of heavy metal ions (Hg 2+ ) from aqueous solutions. Fourier transformed infrared spectroscopy was performed to characterize chemical composition and structure. The adsorption property of Hg 2+ was investigated at different pH values of aqueous solutions and distilled water. The maximal saturated adsorption capacity of Hg 2+ was 4.8 mmol g −1 . © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ping-an Yang,Wenjiao Deng,Haibo Ruan,Zhengwei Qu,Rui Li,Lirui Wang,Jiufei Luo,Zhihao Zhou,Mengjie Shou,Xin Huang,Qiao Chen,Xinglong Gong
The study of designing and developing ferromagnetic nanocomposites with both microwave absorption (MA) and corrosion protection properties through microscopic heterogeneous interfacial engineering and crystal phase engineering remains challenging. In this study, Fe@C core–shell nanowires (FCNWs) are obtained by magnetic field-controlled in situ reduction method and annealing process to de-regulate the carbon shell thickness and carbon morphology. The enhancement of Fe-C heterogeneous relative interfacial effects and dielectric/magnetic response is revealed using density functional theory and simulated electromagnetic field distribution, and the modulation of the amorphous carbon/graphitic carbon ratio achieves the enhancement of dipole polarization in the low-frequency region. The FCNWs absorber had a minimum reflection loss (RL min ) of −47.6 dB at a thickness of 4.9 mm, and the maximum effective absorption bandwidth (EAB max ) was achieved at 5.5 mm up to 4.0 GHz. In addition, the shielding effect of the graphitic carbon shell on the corrosion medium and the addition of additional electron conduction pathways allow the FCNWs absorber to obtain smaller corrosion currents and larger polarization resistances compared to Fe nanowires. Thus, modulation of atomic-scale heterogeneous interfaces and crystal phases has great potential in modulating the dielectric response.
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JOURNAL OF PHYSICAL CHEMISTRY B
·
2024
·
IF 2.8
Hong-Jie Zhang,Xue-Bin Shang,Xu-Ran Wang,Chen-Xi Zhang,Qing-Lun Wang
SCPEEK@MOF proton exchange membranes, where SCPEEK is sulfinyl chloride polyether ether ketone and MOF is a metal–organic framework, were prepared by doping Fe-MIL-101-NH2 into polymers. The amino group in the MOF and the -SOCl2 group in thionyl chloride polyether ether ketone cross-link to form a covalent bond through the Hinsberg reaction, and the prepared composite membrane has stronger stability than other electrostatic interactions and simple physical doping composite membranes. The formation of covalent bonds improves the water absorption of the composite membrane, which makes it easy for water molecules to form hydrogen bonds. Moreover, SPEEK as a proton conductive polymer and the synergy of MOFs improve the proton conductivity of composite membranes. The composite membranes were characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, and atomic force microscopy. The swelling rate, water absorption, mechanical stability, ion exchange capacity, and proton conductivity of the pure sulfonated polyether ether ketone (SPEEK) membrane were compared with those of the mechanically doped SPEEK/MOF membrane and the composite membrane SCPEEK@MOF doped with different ratios of Fe-MIL-101-NH2, and all of the SCPEEK@MOF showed superior performance. When the Fe-MIL-101-NH2 loading rate of the composite membrane is 2%, the proton conductivity of the composite membrane can reach 0.202 S cm–1 at 363 K and a 98% relative humidity, which is much higher than that of the SPEEK/MOF membrane obtained by simple physical doping under the same conditions.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 14
·7883
·
IF 4.9
Bingkai Han,Yuan Chen,Hongtao Wang,Jilong Yan,Guang Liu,Ziru Huang,Chenghang Zhou
Epinephrine (EP) is a very important chemical transmitter in the transmission of nerve impulses in the central nervous system of mammals. Ascorbic acid (AA) is considered to be the most important extracellular fluid antioxidant and has important antioxidant properties in the cell. In this study, a series of transition metal–polyhistidine-carboxylated multi-wall carbon nanotube nanocomposites were synthesized, and their simultaneous catalytic effects on epinephrine and ascorbic acid were investigated. The results showed that nanocomposites based on iron ions had the highest catalytic activity. The prepared biosensor expressed high selectivity toward EP and AA with LOD values of 0.1 μΜ (AA) and 0.01 μΜ (EP), and sensitivity values of 4.18 μA mM−1with a range of 0.001–5 mM (AA), 50.98 μA mM−1with a range of 0.2–100 μM (EP), and 265.75 μA mM−1with a range of 0.1–1.0 mM (EP). Moreover, it showed good stability, good repeatability and high selectivity in real sample detection. This work is a reference for the design of new electrochemical enzyme-free biosensors and the detection of biomarkers.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yihong Wu,Lei Song,Maofeng Shi,Chuhan Gu,Jiaxian Zhang,Jingyu Lv,Lili Xuan
Despite the strict management of eutrophic waters globally, the release of phosphorus (P) from sediments maintains the eutrophic state of water bodies and poses a serious challenge to their management. Ca/Fe–LDH was synthesized with natural zeolite (NZ) by using a co-precipitation method (denoted as CFL-Z) to solve this problem. Results showed that Ca/Fe–LDH was successfully loaded onto the surface and inside the pores of NZ. The maximum P adsorption capacity value of CFL-Z was 46.7 mg/g under the mechanisms of electrostatic attraction, ligand exchange, and ion exchange. In incubation experiments, the addition of 6 % CFL-Z into P-contaminated sediments reduced P concentrations in overlying and interstitial water to 0.013 (97.3 % reduction) and 0.358 (82.1 % reduction) mg/L, respectively. In addition, unstable P forms (NH 4 Cl-P and BD-P) in sediments were converted into stable P forms (HCl-P and Res-P, respectively). Subsequent long-term anoxic experiments showed that CFL-Z capping sediments exhibited better inhibition of sediment P release compared with CFL-Z amendment sediments and was efficient and stable. Microbial community analysis showed that CFL-Z amendment and capping reshaped the microbial community structure, and different functional bacteria influenced the stability of sediment P. This work showed that CFL-Z overlays were considered to have potential applications in sediment P fixation, providing a new way to improve the P-binding capacity of natural mineral-like materials and resolve P-contaminated sediments.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yuqi Liu,Huanxin Zhao,Dan Wu,Xiaoyuan Shang,Mingyi Lv,Huixin Yu
Although single atom catalysts (SACs) have been recognized as a prospective catalyst in advanced oxidation processes (AOPs) via persulfate activation, they still confronted with the issues of metal atoms aggregation and limit loading amounts. For addressing these issues, single Co atoms that incorporated on Fe-Ni layered double hydroxides (FeNi-LDHs) with oxygen vacancies is fabricated. Employing it as the support of Co atoms can not only minimize the aggregation of single metal atoms but also conductive to increase their loading amounts (up to 3.26 wt%), which is expected to display an unprecedented catalytic activity. 100 % of TC (20 mg/L) can be eliminated within 5 min in Co-FeNi-LDH/PMS system. Radical and nonradical pathway collectively contributed to the TC elimination in Co-FeNi-LDH/PMS system, in which the electron transfer process in nonradical pathway is confirmed as the dominate mechanism via electrochemical studies and quenching experiments. PMS was adsorbed by Co-FeNi-LDH to form a Co-FeNi-LDH/PMS* complex during the PMS activation. Subsequently, TC is decomposed by transferring electrons to the Co-FeNi-LDH/PMS* complex via “donor-acceptor complex” mechanism. Benefiting from this mechanism, the Co-FeNi-LDH/PMS system displays superior anti-interference capability against inorganic anions. This study provides a unique insight on the skillful design and application of SACs.
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Energy Storage Materials
·
2025
·
IF 20.2
Nengbiao Zhang,Luming Yin,Letian Chen,Bingbing Ma,Yuantonghe Li,Xinyi Zhang,Junqing Liu,Zhen Zhou
Abstact Lithium-nitrogen (Li-N 2 ) battery is not only an electrochemical energy storage platform, but also an environmentally friendly nitrogen fixation technology. However, a great challenge remains in regulating catalyst activity to accelerate cathode reaction kinetics. Herein, we proposed an oxygen vacancy-mediated modulation of Fe active sites in FeO x nano-particle catalysts and Fe single-atom catalysts to enhance nitrogen reduction reaction in Li-N 2 batteries. High-concentration oxygen vacancy is generated through a size- and crystallinity-dependent oxygen vacancy engineering based on the precise atomic layer deposition of reducible oxides. The oxygen vacancy on FeO x drives the electron redistribution of Fe 3+ d-orbitals to provide electron-donating Fe active sites for N 2 fixation. Meanwhile, oxygen vacancy-rich MoO y is used as a support to anchor Fe single atoms. Adjacent oxygen vacancy drives the stable coordination between Fe single atoms and O atoms to facilitate the directional electron transfer from MoO y to Fe to N 2 . Therefore, the Li-N 2 batteries exhibit large discharge capacity, excellent rate performance, and reliable cycle stability. In addition, the formation and decomposition of the discharge product Li 3 N indicate a reversible N 2 fixation. This work provides a precise regulation mechanism of catalytic active sites based on oxygen vacancy engineering, which is expected to promote the development of high-performance Li-N 2 batteries.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Huayu Wang,Yanhua Cao,Changsheng Guo,Ming Ge
Heterogeneous catalyst/persulfate advanced oxidation process has been widely used in antibiotic wastewater treatment . As-designed MIL-88A(Fe)/g-C 3 N 4 composite catalyst firstly activated peroxydisulfate (PDS) to degrade tetracycline (TC) in this work. Activating PDS by MIL-88A(Fe)/g-C 3 N 4 has a higher efficiency and rate toward TC degradation compared with MIL-88A(Fe) and g-C 3 N 4 . After 60 min, the optimal MIL-88A(Fe)/g-C 3 N 4 -5 activated PDS to degrade about 80% of TC in water. The existence of g-C 3 N 4 increases the specific surface area and active Fe 2+ content of MIL-88(Fe), promotes PDS adsorption and utilization, thus showing an excellent catalytic performance for PDS activation. MIL-88A(Fe)/g-C 3 N 4 activated PDS oxidation process synergistically removed TC by free radicals (O 2 •− , •OH and SO 4 •− ) with non-free radicals ( 1 O 2 ), and the effect of some important operating factors on TC removal, the TC degradation pathways and toxicity of TC intermediates were analyzed. Moreover, the MIL-88A(Fe)/g-C 3 N 4 -5 powdered catalyst was designed into a catalytic membrane, which could remove 96% of TC in a short time (<10 min). The cycle tests confirm that powdered MIL-88A(Fe)/g-C 3 N 4 composite catalyst and its catalytic membrane have a good recyclability and stability, demonstrating that this catalyst possesses a practical application potential in the treatment of TC polluted wastewater.
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