FOOD CHEMISTRY
·
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Lifeng Hao,Junhuan Zhao,Kangyuan Li,Weiping Zheng,Yanfei Yang,Chenyang Qiu,Zewen Jiang,Wenjun Xia
We report a hydrothermal engineering strategy to synergistically regulate structural barriers, oxygen vacancy-driven redox cycling, and surface functionalization in Ce-NiCo-LDH coatings for ultralong corrosion protection. Vertically aligned LDH nanosheets constructed a tortuous labyrinth barrier to physically impede corrosive species penetration. Oxygen vacancies acted as electron reservoirs to drive Ce 3+ /Ce 4+ redox cycling, enabling dynamic passivation repair via preferential Ce 4+ → Ce 3+ reduction at vacancy sites. Surface functionalization further enhanced protection through two independent pathways: CTAB induced interlocked fibrous nanostructures for mechanical reinforcement, while PFDT grafting formed a fluorine-rich hydrophobic barrier through C-F dipole interactions. EIS characterization demonstrated a 3.6-fold enhancement in charge transfer resistance (Rct = 5.1 × 10 5 Ω·cm 2 ) for the sequentially hydrothermally processed Ce-NiCo-LDHs compared to their single-step counterparts (1.4 × 10 5 Ω·cm 2 ). The CTAB-modified coating achieved 99.0 % inhibition efficiency, while PFDT modification provided long-term hydrophobicity. This triple-scale synergy-structural obstruction, redox-mediated self-healing, and surface engineering-provides a universal framework for designing advanced protective coatings.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mingyu Wang,Honglin Kuang,Lu Zhou,Mengru Shan,Sihao Jiang,Danying Ma,Shiwen Lv,Yanqing Cong,Yingqi Song,Yi Zhang
Sea urchin-like Cu x S nanoflowers were prepared on copper foam substrate by in situ thermal oxidation and hydrothermal vulcanization. Then, thiophene (Th) was copolymerized with MgAl layered double hydroxide (MgAl-LDH) on Cu x S to obtain a polythiophene (PTh)/MgAl-LDH@Cu x S composite photocathode. Under visible-light irradiation, the electrode exhibits high photocurrent response and excellent stability for 72 h. Under an applied voltage of 3 V, the photogenic carrier was effectively separated, and combined with the graphite anode to generate highly oxidizing reactive oxygen species (ROS) and active chlorine directly and indirectly, which can achieve logarithmic inactivation of 7.57 and 7.07 log 10 CFU/mL against Escherichia coli and Bacillus subtilis within 15 and 25 min, respectively. The mechanism of photoelectrocatalytic reaction for disinfection was explored through cell membrane integrity, DNA/protein leakage and active substances analysis, and a free radical capture experiment proved that O 2 ∙– and h + played key roles in the disinfection process. The purification and degradation of different actual wastewaters show that the photoelectrocatalytic system has great practical application potential in water disinfection.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Jing Bai,Qijia You,Yushuan Peng,Zhihao Li,Yuling Zhang,Qiulin Deng,Huiwei Liao,Faqin Dong,Xiaofeng Zeng,Zixun Yan
In this work, a novel calcium-aluminum layered double hydroxide-chitosan composite gel bead (LDH-CS) was synthesized for the efficient removal of Pb 2+ from high-salinity oil/gas field wastewater. The successful manufacture of CaAl-LDH by coprecipitation was achieved by utilizing CH 3 COONa to activate PG as an alternative to traditional calcium sources, thereby supporting the value-added use of industrial solid waste. Furthermore, the excellent compatibility between CS and LDH was confirmed through multiple characterization techniques, including SEM/EDS, FT-IR, XRD, and XPS. The greatest adsorption capability of LDH-CS was 827.9±9.6 mg g -1 under the optimal conditions of 0.2 g L -1 dosage, pH of 5, and 25 °C, as confirmed by batch experiments. Fixed-bed experiments confirmed that LDH-CS exhibits outstanding selective adsorption performance in high-salinity wastewater systems from actual oil/gas field, achieving a 99% removal efficiency for Pb 2+ . Compared with traditional powder adsorbents, the efficiency of solid-liquid separation after adsorption is substantially improved by embedding LDH powder in chitosan matrix in LDH-CS gel bead. This design prevents secondary pollution from suspended particles and ensures heavy metal release levels are well below safety limits. LDH-CS provides a practical, efficient and cost-effective technical solution for the treatment of lead-containing wastewater.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Chaoen Li,Ziyu Zhang,Li Che,YuYang Zhou,Honglin Gao,Hanjie Sun,Aiyi Dong
Electrolyzing seawater presents a promising strategy to address the energy crisis. The optimally sulfur-doped S 0.45 -MnCr layered double hydroxide (LDH) catalyst demonstrates exceptional hydrogen evolution reaction (HER) performance in alkaline seawater at 50 °C, requiring overpotentials of only 57.9 mV and 245.4 mV to achieve 10 and 500 mA cm −2 , respectively. For overall seawater splitting, it requires only 1.72 V to deliver 100 mA cm −2 . When used as a cathode in a magnesium-seawater batteries (MSBs), it delivers a power density of 7.80 mW cm −2 . Sulfur doping simultaneously triggers the formation of highly active MnCO 3 during synthesis. Characterization confirms that sulfur doping promotes chromium leaching, thereby enlarging the electrochemical active surface area (ECSA). In situ XRD analysis at various potentials verifies the formation of additional active MnCO 3 species during HER, consistent with the activity enhancement observed in chronopotentiometric measurements. This work offers novel insights for designing bifunctional catalysts for direct seawater electrolysis.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Liang Xie,Shixia Chen,Yicheng Hu,Yeqian Lan,Xiang Li,Qiang Deng,Jun Wang,Zheling Zeng,Shuguang Deng
Cobalt-nickel bimetallic phosphide intersectional nanosheet arrays are fabricated on carbon fiber cloth (CoNi-LDH-350P@CFC) via facile one-step hydrothermal synthesis of CoNi-LDH and a sequent phosphating at an optimal temperature (350 °C). Phosphating temperature is proven to be crucial in modulating the morphology and structure of phosphatized LDHs. The CoNi-LDH-350P@CFC nanosheet arrays not only provide sufficient redox-active sites but also boost the electrical conductivity and facilitate the ion and charge transport. Consequently, the CoNi-LDH-350P@CFC as a self-supported electrode could deliver an ultrahigh specific capacity of 803 C g −1 (or 223 mAh g −1 ) at a current density of 0.5 A g −1 and superior rate retention of 70% at a high rate of 30 A g −1 . Furthermore, the assembled CoNi-LDH-350P@CFC//active carbon (AC) asymmetric supercapacitors (ASCs) can exhibit an impressive energy density of 42 Wh kg −1 at a power density of 400.4 W kg −1 with acceptable cycling stability of 87.7% capacitance retention after 3000 cycles at 10 A g −1 .
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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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高影响因子
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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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Qinglei Sun,Mei Tang,Peter Vang Hendriksen,Bo Chen
A novel hierarchically porous magnetic ZnFe 2 O 4 /MgAl-layered double hydroxide (LDH) was reported as an effective adsorbent for the elimination of Congo Red (CR) from water. Three-dimensional stackable MgAl-LDH nanosheets synthesized through hydrothermal method were attached to the surface of ZnFe 2 O 4 microsphere , using the inexpensive, non-toxic, quick and simple bio-template technique. Mg/Al molar ratios played a crucial role in crystal phase synthesis and adsorption capacity. Adsorption kinetics and thermodynamics of CR adsorption by ZnFe 2 O 4 /MgAl-LDH were also investigated. The adsorption kinetics followed the pseudo-second-order. The maximum adsorption capacity (294.12 mg g −1 ) was obtained by the ZnFe 2 O 4 /MgAl-LDH with Mg/Al molar of 2, which was more productive than the base adsorbent without MgAl-LDH attaching (28.58 mg g −1 ). Adsorption isotherm revealed Langmuir-type monolayer adsorption. The adsorption processes were spontaneous and endothermic in nature. Absorbents fabricated in this work could be easily regenerated by rinsing the material in methanol and magnetically separated from the solution. Adsorbent synthesized in this work is very promising composite for purification of water from toxic chemicals.
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高影响因子
SOLAR ENERGY
·
2019
·
IF 4.674
Weihua Fei,Yun Song,Najun Li,Dongyun Chen,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
A visible-light-active Ni foam@ZnO@ZnFe-LDH composite photocatalyst was fabricated with well-defined porous 2D/2D interconnected nanosheets of ZnO and binary ZnFe layered double hydroxide (ZnFe-LDH) growing vertically on the Ni foam substrate. In view of the excellent conductivity of Ni foam, it can be used as an electrode substrate to deposit ZnO nanosheets on the surface by electrodeposition . Then the ultrathin layered 2D ZnFe-LDH was uniformly coated on ZnO nanosheets by hydrothermal method. A highly effective three-electrode photoelectrocatalytic (PEC) system was constructed with Ni foam@ZnO@ZnFe-LDH as photoanode. The 2D/2D core-shell heterojunction formed between ZnO core and ZnFe-LDH shell not only resulted in a narrowing bandgap and increased the visible light absorption of the ZnO, but also promoted the migration of the photogenerated electrons and then the degradation efficiency with a low applied potential was greatly improved. The dyes (Acid Red 1 as model) and hexavalent chromium ions (Cr(VI)) in water can be simultaneously removed by oxidation reaction on the anode and reduction reaction on the cathode, respectively. In addition, the Ni foam@ZnO@ZnFe-LDH composite photocatalyst also showed outstanding stability during the application process. Thus, the photoelectrocatalytic synergitic effect based on Ni foam@ZnO@ZnFe-LDH gives a simple and effective strategy to fast remove Cr(VI) and organic pollutants in PEC process at low voltage.
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Chemical Science
·
2017
·Vol. 9
·期 5
·1375-1384
·
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
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 47
·22830-22840
·
IF 3.925
Jiajun Nong,Yuexiang Jin,Jun Tan,Hongxia Ma,Yuan Lian
Realizing highly efficient utilization of solar energy for solving problems of environmental pollution and energy shortage has attracted increasing attention. Herein, Z-scheme two-dimensional (2D)/2D NiCo-LDH/g-C3N4 (LDH/CN) heterojunction composites were synthesized, which showed enhanced photocatalytic performance for tetracycline hydrochloride (TC) degradation and hydrogen (H2) generation under visible light irradiation. A 2D/2D heterojunction structure was formed between NiCo-LDH nanosheets (LDH) and g-C3N4 (CN), which was beneficial for the effective separation of photogenerated charge carriers. The active species of hydroxyl (˙OH), superoxide (˙O2−) and hole (h+) radicals contributed to TC photodegradation. The optimum photocatalyst showed a remarkably enhanced photocatalytic capability with a hydrogen generation rate of 451.7 μmol g−1 h−1. The improved photocatalytic activities may be attributed to the synergistic effects of the increased absorption of visible light, the separation efficiency of carriers and the 2D/2D heterostructure. A Z-scheme photocatalytic mechanism was proposed for the LDH/CN composite, showing dual advantages of a high redox ability and efficient charge carrier separation.
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