FOOD CHEMISTRY
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2025
·
IF 9.8
Shuanghuan Gu,Sen Wang,Yongju Zhang,Zhixiang Xu,Longhua Xu
The development of sensitive and selective electrochemical sensors for antibiotic detection is critical to ensuring food safety. Herein, we report a novel biomimetic electrochemical sensor using a ternary AuNP/NiFe-LDH/MWCNT heterostructure combined with molecularly imprinted polymers (MIPs) for detecting enrofloxacin (ENR) in food. The AuNP/NiFe-LDH/MWCNT composite was prepared by in-situ reducing HAuCl 4 on a NiFe-LDH/MWCNT backbone, forming a heterojunction structure that enhances charge separation and electron transfer. Electropolymerization of pyrrole with ENR produced highly selective MIP layers. The synergistic integration of high conductivity, abundant catalytic sites, and selective molecular recognition endows the sensor with excellent electrochemical performance. The sensor exhibits a wide linear range (0.05–100.0 μM) and an ultralow limit of detection (LOD) 0.025 μM. It showed superior selectivity, reproducibility, stability, and applicability in complex aquatic food samples, with recoveries of 94.6 % to 103.9 %. This work paves the way for practical, high-precision monitoring of trace antibiotics in food safety applications.
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PubMed
高影响因子
ACS Catalysis
·
2021
·
IF 13.084
Junjun Lv,Linmeng Wang,Rushuo Li,Kaiyue Zhang,Danfeng Zhao,Yaqiong Li,Xiangjun Li,Xiubing Huang,Ge Wang
The development of high-performance electrocatalysts is a highly efficient strategy to optimize the sluggish kinetic property of the oxygen evolution reaction (OER). Herein, we synthesize a kind of nickel foam (NF)-supported electrocatalyst composed of a one-dimensional Co3O4 nanowire as the core and a two-dimensional NiFe-LDH nanosheet as the shell (denoted as NiFe-60/Co3O4@NF). Fluorine is introduced into the precursor Co(OH)F of Co3O4, which results in improved thermal stability and significantly increased regularly distributed oxygen vacancies, while the electrochemically deposited NiFe-LDH nanosheets possess a crystalline/amorphous hybrid structure. As a result, the hetero-interface mainly constituting Ni species from NiFe-LDH and Co3O4 from Co(OH)F contributes to the interaction between Co and Fe species and facilitates the electron transfer. Simultaneously, the interaction between oxygen vacancies in Co3O4 and coordinatively unsaturated Fe species in the amorphous area in NiFe-LDH is also determined, finally completing the electron backtracking. Benefiting from these factors, only low overpotentials of 221 and 257 mV are required to deliver the current densities of 100 and 500 mA cm–2, respectively, with a quite small Tafel slope of 34.6 mV dec–1 during OER for the well-designed NiFe-60/Co3O4@NF electrocatalyst.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Rong Yang,Yimeng Zhou,Yingying Xing,Di Li,Deli Jiang,Min Chen,Weidong Shi,Shouqi Yuan
Developing active, stable and cost-effective bifunctional electrocatalysts with earth-abundant metals (Ni, Fe, Co) is a prerequisite to achieve overall water splitting. In this work, a novel CoFe-layered double hydroxide (LDH) coupled with NiFe-LDH nanosheet array supported on nickel foam (denoted as CoFe@NiFe/NF) is developed through a facile hydrothermal and electrodeposition method. Remarkably, benefiting from strong synergistic effect between CoFe-LDH and NiFe-LDH and the unique structural features, the resulting CoFe@NiFe/NF architectures catalyst exhibits excellent activities and stabilities for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Furthermore, an efficient and stable alkali-electrolyzer using CoFe@NiFe/NF as both the cathode and anode achieve a voltage of 1.59 V at the current density of 10 mA cm −2 , which is superior to many other state-of-the-art earth-abundant electrocatalysts. This work provides a facile method for enhancing the electrocatalytic activity by constructing hierarchical core-shell architectures using the LDH nanosheet materials.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chen Qiao,Zahid Usman,Tai Cao,Souleymen Rafai,Zhitao Wang,Youqi Zhu,Chuanbao Cao,Jiatao Zhang
High-valence Ni and Fe metal sites have demonstrated a crucial role in enhancing the catalytic performances of NiFe-LDH electrocatalysts in oxygen evolution reaction (OER). Although considerable OER catalytic performances achieved under high overpotential, the catalytic talent of NiFe-LDH electrocatalysts at low overpotential is rarely realized due to the absence of high-valence Ni and Fe sites. We herein report a surface engineering route to fabricate sulfated NiFe-LDH nanosheets via ion exchange strategy in sulfate-rich media. XPS results reveal a modified surface electronic structure with high-valence Ni and Fe after ion exchange reaction. Computational PDOS results suggest that computed d-band centers (ε d ) of Fe and Ni for sulfated NiFe-LDH show a significant downward shift resulting an increased valence of metal cation with orbital volume shrinkage. The high-valence Fe can facilitate a optimized multi-electron process of Ni center from [Ni II -OH] − /[Ni III -OH] − to Ni IV -OOH rather than Ni II /Ni III to Ni IV at low overpotential. The high-valence Ni can serve as the highly active center for O-O coupling during OER process. Combined with the synergetic action of high-valence Fe and Ni, the sulfated NiFe-LDH nanosheets exhibit much larger reaction kinetics and outstanding electrocatalytic activity on glassy carbon electrode (η 10 = 219 mV, η 50 = 288 mV) with a remarkable long-term stability.
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Chemical Science
·
2017
·Vol. 9
·期 5
·1375-1384
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IF 8.668
Fang-Shuai Zhang,Jia-Wei Wang,Jun Luo,Rui-Rui Liu,Zhi-Ming Zhang,Chun-Ting He,Tong-Bu Lu
The development of highly efficient, low-cost and stable electrocatalysts for overall water splitting is highly desirable for the storage of intermittent solar energy and wind energy sources. Herein, we show for the first time that nickel can be extracted from NiFe-layered double hydroxide (NiFe-LDH) to generate an Ni2P@FePOx heterostructure. The Ni2P@FePOx heterostructure was converted to an Ni2P@NiFe hydroxide heterostructure (P-NiFe) during water splitting, which displays high electrocatalytic performance for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1.0 M KOH solution, with an overpotential of 75 mV at 10 mA cm−2 for HER, and overpotentials of 205, 230 and 430 mV at 10, 100 and 1000 mA cm−2 for OER, respectively. Moreover, it could afford a stable current density of 10 mA cm−2 for overall water splitting at 1.51 V in 1.0 M KOH with long-term durability (100 h). This cell voltage is among the best reported values for bifunctional electrocatalysts. The results of theoretical calculations demonstrate that P-NiFe displays optimized adsorption energies for both HER and OER intermediates at the nickel active sites, thus dramatically enhancing its electrocatalytic activity.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Xingjian Dai,Dachong Gu,Quan Zhou,Xinfang Zhang,Chenzhi Zhang,Tao Sun,Xiaoying Liu,Dan Song,Lihong Gao,Jishu Zheng,Jinsong Rao,Yuxin Zhang
The integration of multiple degradation pathways in a single catalyst has been proposed as a promising strategy for environmental remediation. The successful transition process from MnO 2 to alpha-Fe 2 O 3 is used to prepare 1D/2D/3D alpha-Fe 2 O 3 @NiFe LDH@diatomite (FENFD) nanocomposite for improving conversion efficiency during pollutant degradation. The effects of initial pH, pollutant concentration, persulfate (PS) dosage, and catalyst dosage on the degradation rate were systematically investigated. FENFD demonstrated favorable PS activation performance and high degradation efficiency for Rhodamine B , azo dyes , and tetracycline over a broad pH range. Comparative experiments with quenching catalytically active radicals and analysis of electron spin resonance (ESR) spectra reveal that the sulfate radical generated by PS photocatalytic activation has a synergistic effect with superoxide radical and hydroxyl radical to degrade pollutants. Biotemplate-diatomite effectively achieves the dispersion of magnetic nano Fe 2 O 3 and LDH and increases light utilization. Meanwhile, density functional theory (DFT) calculations demonstrate that the in situ grow Fe 2 O 3 @NiFe LDH heterojunctions can efficiently transform the interface band structure to inhibit the recombination of photogenerated electron-hole pairs. The stability and reusability of the magnetic nanocomposites were also evaluated, and the degradation efficiency reached 96.4% even after five cycles, which provides new insight into designing single catalysts with different degradation mechanisms.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
·
IF 4.1
Yaoxia Yang,Fuxing Zhou,Ruirui Zhang,Bolin Xiong,Zhen Yao,Dongfei Sun,Qingtao Wang,Zhiwang Yang
Hydrogen is the most suitable green energy for the current era, and electrolyzing water to produce hydrogen is the most efficient preparation method. The development of efficient oxygen evolution reaction (OER) electrocatalysts is crucial for sustainable energy conversion. In our work, we construct a hierarchical CNFS@NiFe-LDH/NF heterostructure by integrating ZIF-67-derived cobalt sulfide with nickel‑iron layered double hydroxide (LDH) and bimetallic sulfides on nickel foam (NF). This composite synergistically combines the high surface area and active sites from the MOF-derived sulfide, the tunable layered structure and abundant -OH groups from the LDH-which facilitate OH − adsorption and O O formation-as well as electronic modulation effects from the bimetallic sulfides. The catalyst exhibits excellent OER performance with an overpotential of 236 mV at 10 mA cm −2 and a Tafel slope of 42.23 mV dec −1 under alkaline conditions, and maintains high conductivity and low charge transfer resistance throughout operation. Meanwhile, the catalyst showed excellent stability for at least 66 h during the OER process at 50 mA cm −2 , which demonstrates outstanding durability. Moreover, this catalyst have satisfactory hydrophilicity/aerophobicity. This work provides an effective strategy for designing high-performance and stable electrocatalysts via heterogeneous interface engineering.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Jin Zhao,Tianxiang Jiang,Junrui Cao,Xuemin Feng,Xunliang Wang,Baolong Xie,Yuhui Ma,Huafeng Ren,Yu Cheng,Keyuan Zhang,Yutong Han,Xianghai Guo,Yizhong Zhang
Mild hydrothermal strategy well preserves abundant O/N functional groups of Chitosan-derived amorphous carbon. • Chitosan-derived amorphous carbon efficiently stabilizes intrinsic Ni 3+ active sites. • Pre‑stabilized intrinsic Ni 3+ promotes the reconstruction of γ‑NiOOH. • Interfacial electronic modulation lowers UOR overpotential and delivers remarkable UOR activity. Replacing the sluggish oxygen evolution reaction (OER) with the urea oxidation reaction (UOR) offers a promising route for energy-efficient hydrogen production and the electrochemical treatment of urea-containing wastewater. However, the practical application of UOR is still hindered by insufficient anode durability and sluggish UOR kinetics. Herein, biomass chitosan was employed as the carbon precursor to fabricate amorphous carbon-modified coral-like NiFe layered double hydroxide (NiFe-LDH), which was in-situ anchored on nickel foam via a facile one-step hydrothermal strategy. The optimized catalyst achieved remarkable UOR electrocatalysis, requiring only 0.94 V and 0.96 V overpotential to reach 50 mA·cm −2 and 100 mA·cm −2 , respectively, accompanied by a small Tafel slope of 22 mV·dec −1 and outstanding long-term stability exceeding 1000 h at 100 mA·cm −2 . Operando spectroscopic characterizations and density functional theory (DFT) calculations indicated that electron-withdrawing functional groups on chitosan-derived amorphous carbon induced interfacial electron transfer, which stabilized electron-deficient Ni 3+ sites. This pre-stabilized Ni 3+ facilitated the in-situ generation of active γ-NiOOH at low potential, while γ-NiOOH served as the catalytic phase to drive the UOR; the complementary synergy between the two significantly enhanced the overall catalytic performance. This study affords a versatile interfacial modulation protocol for designing high-performance crystalline/amorphous hybrid electrocatalysts, which may offer a promising route for sustainable energy conversion and the electrochemical treatment of urea-containing wastewater. Download: Download high-res image (213KB) Download: Download full-size image Electron-withdrawing O/N groups of chitosan-derived amorphous carbon tunes Ni and Fe 3d- t 2 g orbitals of NiFe-LDH via interfacial charge transfer, stabilizing intrinsic Ni 3+ and reducing UOR overpotential.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
·
IF 4.4
Danyang Liu,Miaomiao Jing,Qiang Zhao,Junli Wang,Zhifang Jia,Zuopeng Li,Kewei Wang,Yong Guo,Yuanzhen Ke
A novel S-scheme heterojunction N,S-NiFe-LDH/N-Bi₂MoO₆ was successfully constructed. • 5 wt% N,S-NiFe-LDH/N-Bi₂MoO₆ showed the highest activity, degrading 86.3% of TC in 100 min under visible light. • Element doping and interface engineering synergistically enhanced visible-light absorption and charge separation. • ·OH and ·O₂ − were the dominant active species responsible for TC degradation. A step-scheme (S-scheme) heterojunction photocatalyst was constructed via a hydrothermal method, consisting of N,S co-doped NiFe layered double hydroxide (N,S-NiFe-LDH) and nitrogen-doped bismuth molybdate (N-Bi₂MoO₆). The morphology, crystal structure, optical properties, elemental valence states, and charge separation/transport performance of the composite catalyst were systematically investigated using various characterization techniques, including SEM, TEM, HRTEM, XRD, UV–Vis DRS, XPS, and EIS. Its photocatalytic activity was evaluated through tetracycline (TC) degradation experiments under visible light irradiation, and the catalytic mechanism was elucidated by EPR radical detection. The results showed that the incorporation of N,S-NiFe-LDH enhanced the photocatalytic performance of the composite catalyst. Among the tested samples, the 5 wt% N,S-NiFe-LDH/N-Bi₂MoO₆ composite exhibited the highest degradation efficiency, achieving 86.3% TC removal within 100 min. The synergistic interaction between N,S-NiFe-LDH and N-Bi₂MoO₆ promoted the separation efficiency of electrons and holes, thereby significantly enhancing the photocatalytic activity.
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高影响因子
NUCLEAR TECHNOLOGY
·
2025
·
IF 2
Qianwen Wang,Dingcheng Wang,Jinfeng Li,Bo Tian,Zhigang Li,Jianwei Zhang,Wenze Li,Nan Zhang,Yunchen Du,Hongtao Zhao
The extraction and recovery of uranium play a crucial role in ensuring the sustainable supply of nuclear energy and safeguarding environmental security. The ideal uranium adsorbent should have high adsorption capacity, excellent selectivity, and good reusability. In this study, by employing the strategy of using MIL-100(Fe) as an intermediate linker, the core shell, structured of Fe3O4@NiFe-LDH, was successfully accomplished via a solvothermal method. The as-prepared Fe3O4@NiFe-LDH shows great potential in the field of uranium adsorption.On one hand, MIL-100(Fe) can act as an iron source for NiFe-LDH, making the core-shell structure more stable. It was observed that after four adsorption-desorption cycles, the adsorption efficiency of Fe3O4@NiFe-LDH could still reach 75% in the fifth cycle. By contrast, materials without the MIL-100(Fe) intermediate layer exhibited a relatively lower adsorption cycle efficiency for three cycles. On the other hand, the porous structure of metal organic framework (MOF) doubles the specific surface area of Fe3O4@NiFe-LDH compared to Fe3O4/NiFe-LDH without a MOF intermediate layer.The abundant hierarchical pore structure further enhances the performance of Fe3O4@NiFe-LDH from 615.6 mg·g−1 of Fe3O4/NiFe-LDH(8:1) to 862 mg·g−1. Additionally, in-depth studies on adsorption kinetics and adsorption thermodynamics suggest that the adsorption process is more inclined to monolayer adsorption and is dominated by chemical adsorption, which is a spontaneous endothermic process. When conducting ion competition tests on the adsorbent, it was found that the adsorbent has high adsorption selectivity for U(VI) and good regeneration ability. Therefore, the addition of the intermediate MOF improves the adsorption capacity and stability of the material, indicating that Fe3O4@NiFe-LDH has potential advantages in practical applications.
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Journal of Physical Chemistry Letters
·
2026
·
IF 4.5
Vahid Daneshvariesfahlan,Yifei Xu,Shengyu Ma,Ping Xu,Qiang Fu,Yuming Huang,Bing Zhang,Mir Ghasem Hosseini,Jiheng Zhang,Yishen Cheng,Kaixi Wang,Bo Song
Ampere-level direct seawater electrolysis offers a sustainable approach for green hydrogen production, but its advancement is hindered by the competitive chloride evolution reaction (ClER) and catalyst corrosion at the anode. To overcome this limitation, we herein demonstrate a simultaneous surface and interlayer engineering of NiFe layered double hydroxide (LDH) anode by incorporating anionic surfactant (sodium dodecyl sulfate, SDS) through a facile anion exchange strategy. The dodecyl sulfate (DS) anion intercalation significantly expands the interlayer spacing and modulates the electronic structure of metal centers, thereby enhancing the intrinsic oxygen evolution reaction (OER) activity. Concurrently, the anionic groups anchored in the interlayer and adsorbed on the surface create a persistent electrostatic barrier that effectively repels Cl– ions. Consequently, NiFe LDH-SDS achieves 1.0 A cm–2 at low overpotentials of 311 mV and 353 mV in alkaline simulated and natural seawater, respectively, and delivers exceptional corrosion resistance and durability, operating stably for over 500 h in simulated and 380 h in natural seawater at 1.0 A cm–2, which far outperforms pristine NiFe LDH. More impressively, it sustains consistent performance for 500 h in overall seawater splitting at 1.0 A cm–2. This work offers a facile route to develop corrosion-resistant OER electrocatalysts for seawater splitting.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Shengwang Mo,Da Song,Yang Li,YuChao Zhou,Zhao-Qing Liu,Zhen Huang,Fang He
Coupling renewable energy with seawater electrolysis for green hydrogen production represents a promising approach in energy storage and conversion. Yet, conventional anodic materials suffer from chloride corrosion and active-site blockage in seawater, causing rapid deactivation at high current densities. It is thus crucial to develop electrode materials with inherent corrosion resistance and high catalytic activity that can sustain operation at ampere-level currents in harsh seawater environments. In this work, we precisely engineered a NiFe layered double hydroxide (LDH) anode functionalized with adsorbed PO43– and SO42– anions. This modified catalyst demonstrates exceptional sustainability-relevant durability, operating continuously for over 140 h at an industrially relevant current density of 1100 mA cm–2 in an alkaline flow cell, while requiring an overpotential of only 201 mV to achieve 100 mA cm–2. Compared to the unmodified sample, the catalyst demonstrates significantly enhanced activity and corrosion resistance. Further mechanistic insights into the oxygen evolution reaction (OER) were gained through in situ spectroscopy and electrochemical differential mass spectrometry (DEMS). In situ Raman spectroscopy captured the dynamic reconstruction of the electrode material, leading to the formation of a stable active phase identified as NiFeOOH/PO43–/SO42–. By combining in situ 18O-isotope-labeled DEMS with ATR-FTIR spectroscopy, the compatibility between the conventional adsorbate evolution mechanism (AEM) and the lattice oxygen mechanism (LOM) during the OER was confirmed. The synergy of these two mechanisms was shown to further enhance the OER performance. The results establish that PO43–/SO42– adsorption plays a dual role: it electrostatically repels Cl– to mitigate corrosion, while simultaneously activating lattice oxygen to promote the LOM pathway, thereby improving surface reactivity. The anion adsorption strategy presented here offers valuable guidance for designing efficient and robust anode materials for seawater electrolysis.
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