TALANTA
·
2024
·
IF 5.6
Cheng-Lin Yang,Li-Hong Yu,Yue-Hong Pang,Xiao-Fang Shen
The residues of organophosphorus pesticides (OPs) are increasing environmental pollution and public health concerns. Thus, the development of simple, convenient and sensitive method for detection of OPs is crucial. Herein, a multifunctional Fe-based MOF with fluorescence, catalytic and adsorption, is synthesized by a simple one-pot hydrothermal method . The ratiometric fluorescence sensor for detection of OPs is constructed by using only one multifunctional sensing material. The NH 2 -MIL-101(Fe) is able catalyze the o -phenylenediamine (OPD) into 2,3-diaminophenazine (DAP) in the presence of H 2 O 2 . The generated DAP can significantly quench the intrinsic fluorescence of NH 2 -MIL-101(Fe) by the fluorescence resonance energy transfer (FRET) and internal filtration effect (IFE), while producing a new measurable fluorescence. Without immobilization or molecular imprinting, pyrophosphate ion (PPi) can inhibit the peroxidase-like activity of the NH 2 -MIL-101(Fe) by chelating with Fe 3+ /Fe 2+ redox couple. Moreover, PPi can also be hydrolyzed by alkaline phosphatase (ALP), the presence of OPs inhibits the activity of ALP, resulting in the increase of extra PPi preservation and signal changes of ratiometric fluorescence, the interactions of ALP with different OPs are explored by molecular docking , the OPs (e.g., glyphosate) interact with crucial amino acid residues (Asp, Ser, Ala, Lys and Arg) are indicated. The proposed sensor exhibits excellent detection performance for OPs with the detection limit of 18.7 nM, which provides a promising strategy for detection of OPs.
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高影响因子
APPLIED SURFACE SCIENCE
·
2012
·
IF 2.103
Yunxia Zhu,Yuming Zhou,Tao Zhang,Man He,Yongjuan Wang,Xiaoming Yang,Yong Yang
Lactate-intercalated Co–Fe layered double hydroxides (LDHs) were successfully prepared by coprecipitation and hydrothermal method. In this process, divalent metal ions as precursors can be obtained from the reduction reaction of lactic acid and metal powder (cobalt and ferrous). In order to obtain Fe 3+ , H 2 O 2 (30%) was used to oxidize Fe 2+ . Meanwhile, the produced lactate was intercalated into the LDHs interlayers to compensate the positively charged layers. The as-synthesized LDHs were studied by element chemical analysis, powder X-ray diffraction (XRD), FT-IR spectroscopy, thermogravitry (TG) and differential scanning calorimetry (DSC), TEM. The results indicated that the basal spacing value of the LDHs was larger than that of lactate-intercalated Mg–Al or Zn–Al LDHs. It proved that the lactate anions were inserted into the gallery in the form of dimers which made it easy to be delaminated in water. The obtained nanosheets were deposited on the substrates to form the film which was characterized by TEM and AFM, and infrared emissivity value (8–14 μm) was also investigated. The infrared emissivity values of Co–Fe LDHs were lower than that of Zn–Al which took advantage of the special electronic structure in Co and Fe. Besides, the orderly structure and the reduction of the interfacial deficiency of the film made the values further reduced.
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高影响因子
CATALYSIS LETTERS
·
2024
·
IF 2.3
Xu Chao,Hou Jingting,Tang Zeming,Lai Qingxue,Liang Yanyu
Iron–nitrogen co-doped carbon (Fe/N/C) catalysts derived from zinc-based zeolite imidazole frameworks (ZIF-8) have been ideal alternatives to platinum group metals (PGM) and shown great potential to catalyze oxygen reduction reaction (ORR). Unfortunately, the ORR performance is seriously suppressed by the insufficient density and accessibility of the electrochemical active Fe–N sites. The precise regulation of ZIF-8 to the formation of Fe/N/C catalysts with the desired Fe–N sites for ORR is a critical challenge. Herein, a citric acid assisted reconstitution strategy is proposed to design Fe doped ZIF-8 frameworks and construct multi-dimensional Fe/N/C catalysts composed of inner concave and entangled carbon nanotubes outer moieties for efficient acid-resistant ORR reaction. The introduction of citric acid imparts Fe/N/C catalysts with dense accessible active sites and highly opened multi-dimensional mass transfer pathways. Therefore, the optimized Fe/N/C catalysts dominant half-wave potential of 0.785 V and great acid stability were obtained in 0.5 M H 2 SO 4 with a high number of transferred electrons and a low yield of H 2 O 2 ( \(\overline{{\text{n}}}\) = 3.97 and average yield = 4%). This work provides a novel and feasible approach to design and tailoring of Fe/N/C catalysts with improved distribution density and accessibility of the Fe–N active sites. Graphical Abstract
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Small
·
2025
·
IF 12.1
Hao Li,Zhihao Zhang,Dingding Zhu,Huiyuan Zheng,Zhongze Zhu,Nana Shen,Zhu Guo,Xiaolin Wu,Xiaoying Qi,Qiang Li,Qingming Ma,Hongfei Xiang
Low back pain (LBP) resulting from sciatic nerve compression presents major challenges in pain management, as traditional therapies provide only short-term relief and pose risks of systemic toxicity. In this study, an innovative Fe 3 O 4 @ZIF-8-RVC (FZR) dual-responsive nanoplatform is introduced that integrates magnetic targeting with pH-sensitive, sustained drug release to overcome these limitations. The FZR nanoplatform encapsulates ropivacaine (RVC) within the ZIF-8-coated Fe 3 O 4 core, enabling precise and prolonged analgesia at the injury site through magnetic guidance and acid-triggered release. In vitro and in vivo assessments indicate that FZR achieves high drug loading, sustained release in acidic environments, and excellent biocompatibility, significantly extending analgesic effects in chronic nerve injury models while minimizing systemic exposure. Behavioral tests and molecular analyses in LBP rat models confirm that FZR effectively suppresses pain-related neuronal activity and central sensitization markers. This dual-responsive nanoplatform FZR offers a safe, long-lasting, and targeted therapeutic approach, holding strong potential for advancing pain relief in LBP and related neuropathic pain conditions.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Dan Zhao,Deying Liang,Huan Liu,Xincai Xiao
Hypoxanthine (Hx) and pH are important indicators for evaluating the freshness of aquatic products, and their rapid assessment can maximize public food safety and minimize economic losses. A nanozymes-loaded smart responsive hydrogel compound provides a new strategy for rapidly assessing the freshness of aquatic products. Accordingly, this paper reports the preparation of a hydrogel compound with pH responsiveness and peroxidase (POD) activity using a one-step method. In this method, sodium alginate, chitosan, and gelatin are used as the raw materials and Fe,Co,P-CDs (CDs) with POD activity as well as 3,3′,5,5′-tetramethylbenzidine and H 2 O 2 are simultaneously introduced as substrates. The hydrogel compound transforms from a solid to a sol based on its pH response (pH = 6.5–8.0), and its color changes from blue to colorless because of its Hx response to the inhibition of the POD activity of CDs. The color difference shows a good linear relationship with the Hx concentration in the range of 1.5–1500 μM, with a detection limit of 1.48 μM and an excellent recovery rate of practical samples. Based on the pH enhancement and Hx accumulation during the spoilage of shrimps, naked-eye and smartphone-assisted, real-time monitoring of the freshness of shrimp has been realized through the morphology and color changes of the hydrogel compound. This dual-response hydrogel compound provides a new strategy for monitoring the freshness of aquatic products with great potential in food safety monitoring.
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Energy & Environmental Materials
·
2024
·Vol. 7
·期 5
·e12717
·
IF 13
Dongliang Liu,Hang Shang,Chuan Zhou,Jie Miao,Daxiang Xue,Zeping Chen,Meijuan Fei,Fengli Liang,Qiang Niu,Ran Ran,Wei Zhou,Zongping Shao
Solid oxide electrolysis cells (SOECs), displaying high current density and energy efficiency, have been proven to be an effective technique to electrochemically reduce CO 2 into CO. However, the insufficiency of cathode activity and stability is a tricky problem to be addressed for SOECs. Hence, it is urgent to develop suitable cathode materials with excellent catalytic activity and stability for further practical application of SOECs. Herein, a reduced perovskite oxide, Pr 0.35 Sr 0.6 Fe 0.7 Cu 0.2 Mo 0.1 O 3-δ (PSFCM0.35), is developed as SOECs cathode to electrolyze CO 2 . After reduction in 10% H 2 /Ar, Cu and Fe nanoparticles are exsolved from the PSFCM0.35 lattice, resulting in a phase transformation from cubic perovskite to Ruddlesden–Popper (RP) perovskite with more oxygen vacancies. The exsolved metal nanoparticles are tightly attached to the perovskite substrate and afford more active sites to accelerate CO 2 adsorption and dissociation on the cathode surface. The significantly strengthened CO 2 adsorption capacity obtained after reduction is demonstrated by in situ Fourier transform-infrared (FT-IR) spectra. Symmetric cells with the reduced PSFCM0.35 (R-PSFCM0.35) electrode exhibit a low polarization resistance of 0.43 Ω cm 2 at 850 °C. Single electrolysis cells with the R-PSFCM0.35 cathode display an outstanding current density of 2947 mA cm −2 at 850 °C and 1.6 V. In addition, the catalytic stability of the R-PSFCM0.35 cathode is also proved by operating at 800 °C with an applied constant current density of 600 mA cm −2 for 100 h.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Panpan Chen,Han Wang,Huan Li,Baitong Niu,Hongxu Guo,Zhangxu Chen
Spindle-shaped NH 2 -MIL-101(Fe) has been fabricated through the ultrasound-assisted synthesis method and then characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Scanning electron microscope (SEM), High resolution transmission electron microscope (HRTEM), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) analyses. The sample shows a high-performance electrochemical sensor for heavy metal ions (Pb(II), Cu(II) and Hg(II)) and dopamine. The as-prepared NH 2 -MIL-101(Fe)/GCE electrode exhibited detection limits of 12.0 nM, 8.53 nM, and 18.0 nM for Pb(II), Cu(II) and Hg(II), respectively, and with good stability and reproducibility. The NH 2 -MIL-101(Fe)/CPE electrode for dopamine detection showed a wide linear range of 0.3 to 450 μM with a detection limit of 0.025 μM, and also demonstrating excellent anti-interference properties and stability. This study provides a new strategy through simple ultrasound preparation for the highly sensitive electrochemical sensor detection of heavy metal ions and organic compounds.
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Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 36
·19378-19389
·
IF 8.867
Yingpan Song,Fenghe Duan,Shuai Zhang,Jia-Yue Tian,Zhihong Zhang,Zhuo-Wei Wang,Chun-Sen Liu,Wen-Ming Xu,Miao Du
A series of nanocomposites comprised of iron oxide and mesoporous carbon (denoted as Fe3O4@mC) were derived from an Fe(II)-based metal–organic framework (525-MOF) by calcining at different temperatures. The advantages of chemical functionality, strong bioaffinity, and high stability of the Fe3O4@mC can be combined with the high specific surface area of 525-MOF leading to the formation of Fe3O4@mC nanocomposites as a scaffold for oxytetracycline (OTC) aptamer strands. The use of Fe3O4@mC nanocomposites reveals high OTC detection efficiency. The nanocomposite calcined at 900 °C (denoted as Fe3O4@mC900) is found to be the best candidate toward high-sensitivity and high-selectivity detection of OTC because of its excellent functionality, nanostructural properties, and high electrochemical performance. Accordingly, the Fe3O4@mC900-based electrochemical aptasensor displays high sensitivity with a low detection limit of 0.027 pg mL−1 within a broad linear range of OTC concentration from 0.005 to 1.0 ng mL−1. The aptasensor also exhibits high selectivity, reproducibility, stability, regenerability, and applicability in milk samples. All of these results indicate that the Fe3O4@mC nanocomposites that originated from 525-MOF can be applied in the fields of trace and fast antibiotic determination.
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ADVANCED FUNCTIONAL MATERIALS
·
2017
·Vol. 27
·期 27
·1700886
·
IF 12.124
Yecan Pi,Qi Shao,Pengtang Wang,Jun Guo,Xiaoqing Huang
The development of bifunctional electrocatalysts for overall water splitting in acidic media is vital for polymer electrolyte membrane (PEM) electrolyzers, but still full of obstacles. Here, highly efficient acidic overall water splitting is realized by utilizing ultrasmall, monodispersed Iridium (Ir)-based nanoclusters (NCs) as the candidate, via a surfactant-free, wet-chemical, and large-scalable strategy. Benefiting from the high specific surface area, clean surface, and strong binding between NCs and supports, the IrM NCs exhibit attractive activities and durability for both oxygen evolution reaction and hydrogen evolution reaction in acidic electrolytes, with IrNi NCs showing the best performance. More significantly, in the overall water splitting, IrNi NCs reach 10 mA cm −2 at a cell voltage of only 1.58 V in 0.5 m H 2 SO 4 electrolyte, holding promises for potential implementation of PEM water electrolysis. This work opens a new avenue toward designing bifunctional “acidic stable” catalysts for efficient overall water splitting.
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JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Yan-hong Zhang,Fu-qiang Liu,Chang-qing Zhu,Xiao-peng Zhang,Meng-meng Wei,Feng-he Wang,Chen Ling,Ai-min Li
A novel (N,Fe)-dual-functional biosorbent (N/Fe-DB) capable of efficient synergistic removal of Ni(II) and H 2 PO 4 − from aqueous solution was synthesized. The adsorption capacities of Ni(II) and H 2 PO 4 − were both remarkably enhanced over 3 times compared with those in single systems. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed that complexation of amino groups and ligand exchange of hydrous ferric oxide in N/Fe-DB played dominant roles. The electric double layer compressing and chelating ligand of deprotonated H 2 PO 4 − accounted for the enhanced removal of Ni(II) in binary system, while cation bridge interaction promoted uptake of H 2 PO 4 − . Furthermore, the coadsorbates were sequentially recovered, with the ratios of more than 99.0%. Besides, the recovered N/Fe-DB remained stable and applicable to the treatment of real electroplating wastewater even after six adsorption-regeneration cycles. Since the electroplating industry is springing up, effective control of heavy metals and phosphate has attracted global concerns. Based on the enhanced coremoval properties and superb regenerability, N/Fe-DB is potentially applicable to practical production.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xiao Wei,Fengjie Wang,Xinyi Wang,Xiu Yi,Hongzhu He,Xinni Liu,Yuyu Yang,Ilhem Kerboua
The peony pod is a component of the cash crop oil peony (Paeonia suffruticosa Andr.), it accounts for more than half of the quality of the peony seed. However, indiscriminate disposal leads to resource waste. In addition, the pollution caused by the overuse of antibiotics and the evolution of resistance have been a conundrum. There is an urgent need to find a pollutant removal method that conforms to the current concept of sustainable development. In this study, the biomass porous carbon (PC N, Fe -0.5) was prepared and modified by one-step synthesis method using the by-product peony pod as carbon precursor, urea as nitrogen source, and steel slag as magnetic material. The utilization of biomass waste solved resources waste caused by the unreasonable disposal of agricultural solid waste. The doped materials were cheap and easy to obtain, and they improved the structure and function of porous carbon. The maximum adsorption capacity of PC N,Fe -0.5 reached 726.4 mg·g −1 with 100 mg·L −1 of tetracycline (TC). The adsorption mechanism was summarized as pore filling, van der Waals force, π-π EDA, surface complexation, hydrogen bonding and chemisorption . A low-budget tetracycline (TC) removal method was explored through the investigation on the adsorption performance and recovery capability of PC N,Fe -0.5, which was also conducive to realizing the recycling of biomass waste and industrial waste.
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MOLECULES
·
2024
·Vol. 29
·期 17
·4194
·
IF 4.2
Kaiwei Ding,Tingsheng Qiu,Xianhui Qiu,Guanfei Zhao,Qinghao Jiao,Jiangjie Fang,Ruisen Lai,Wenhui Yang
The floatability of fluorite and calcite exhibit similar properties, rendering their flotation separation challenging. Macromolecular polysaccharide reagents containing the polyhydroxyl group have shown broad promising application. The selectivity of polysaccharide is relatively low. In this study, the introduction of Fe3+was employed to enhance the selective adsorption capacity of Pullulan polysaccharide towards fluorite and calcite minerals, thereby achieving effective flotation separation. Furthermore, the mechanism underlying intramolecular interactions was elucidated. The DFT calculation and XPS analysis revealed that the adsorption of Fe3+on the calcite surface was more favorable, leading to the formation of a Ca-O-Fe structure. The MD simulation, XPS analysis, and Zeta potential analysis revealed that the Fe-OH groups on the surface of calcite reacted with the -OH groups in Pullulan and formed bonds, resulting in the formation of a Calcite-Fe-Pullulan structure. This facilitated the attachment of a significant number of Pullulan molecules to the calcite surface. The formation of a hydrophilic layer on the outer surface of calcite by Pullulan, in contrast to the absence of such layer on fluorite’s surface, results in an increased disparity in surface floatability between these two minerals, thereby enhancing the efficiency of flotation separation.
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高影响因子
危险品化学品经营许可证（带存储）