Results in Chemistry
·
2025
·
IF 4.2
Weiyan Shi,Xinning Zhang,Xin Yang,Long Bai,Jinsong Yu,Fei Xu,Tai Ye
Recently, enthusiasm for catalysts-based nanozymes in various catalytic systems has been growing significantly. However, the low catalytic capacity of reported enzyme-mimic catalysts has not met the requirements for practical applications. In this work, Co-Fe Prussian blue analogs yolk-shelled nanocubes (Co-Fe PBAs YSHCs) successfully prepared by a template-assisted ion exchange method are demonstrated for efficient AA sensing. The as-prepared Co-Fe PBAs YSHCs display superior and desirable peroxidase-like activity. The unique YSHCs structures can expose large active sites and enhance the stability during the colorimetric sensing process. As a result, the Co-Fe PBAs YSHCs sensing platform can sensitively and accurately determine AA in both colorimetric and smartphone sensing modes, the wide linear ranges for AA were 1–95 μM with a low limit of detection of 0.9 μM. In addition, the Co-Fe PBAs YSHCs sensing platform can be explored for AA detection in human serum samples, yielding satisfactory recoveries. This work provides an ideal method for preparing catalysts and pioneers the investigation of nanozymes with peroxidase-like activity in biosensing platform.
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Small
·
2025
·Vol. 21
·期 15
·2412473
·
IF 12.1
Xinyu Zhu,Minghao Fang,Bozhi Yang,Shaorou Ke,Meiling Zhan,YuanMeng Wang,Shujie Yang,Xin Li,Yanghong Li,Xin Min
Facing the complex application environment and overall inefficiency in the complete water-splitting process, the development of highly efficient and stable catalytic materials is urgently required. This study innovatively proposes and for the first time implements a rapid synthesis technique driven by microwave-induced sulfur sublimation, successfully preparing MS 2 /RuS 2 (M = Co, Fe, Ni) heterostructure interfaces with high structural stability and uniform active site distribution within merely 60 s. By incorporating iron-group sulfides, the electronic structure of pyrite-type RuS 2 is effectively modulated, enabling the developed MS 2 /RuS 2 @G catalyst to exhibit superior activity in alkaline environments. Particularly, the cobalt-based sulfide regulated pyrite-type RuS 2 (CoS 2 /RuS 2 @G) achieves a mass activity in the hydrogen evolution reaction (HER) that is 15.4 times that of 20 wt.% Pt/C, and in the oxygen evolution reaction (OER), it surpasses commercial IrO 2 by two orders of magnitude. This research not only provides a new pathway for enhancing the performance and environmental adaptability of water-splitting catalysts but also presents a simple and universal method to boost catalytic activity through a synergistic modulation strategy.
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2025
·
IF 3.5
Hu Lan,Zhao Qiuyue,Zhang Xinling,Li Huipeng,Bian Cheng,Zeng Yiqing
Redox sites and acidic sites are the main active sites of bimetallic oxide catalysts used for selective catalytic oxidation of NH 3 (NH 3 -SCO). In this work, three MMoO x (M = Cr, Fe, and Mn) bimetallic oxides catalysts were prepared by simple grinding and calcination to investigate the effect of redox sites (M sites) on the NH 3 -SCO performance. The NH 3 -SCO test results showed that the activity of MMoO x is in the order of CrMoO x > MnMoO x > FeMoO x . The characterization results of H 2 -TPR, O 2 -TPD, NH 3 -TPD, and in situ DRIFTS proposed that the NH 3 -SCO reaction on MMoO x catalysts is proceed via i-SCR mechanism, and the formation of the intermediates of NH 3 -SCR reaction is the decisive reaction step. Owing to the excellent ability in promoting the formation of nitrate/nitrite species, CrMoO x and MnMoO x samples show much higher NH 3 -SCO activity than FeMoO x sample . CrMoO x can facilitate the formation of a large amount of –NH 2 species, which together with nitrate/nitrite species enhance the NH 3 -SCO reaction via i-SCR reaction route. Therefore, CrMoO x shows the highest NH 3 -SCO activity among the MMoO x catalysts. Through this work, the redox sites of bimetallic oxide catalysts are demonstrated as a vital role in inducing the formation of reaction-active intermediates, which highlight the importance of choosing the redox sites in designing NH 3 -SCO catalyst.
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Journal of Physical Chemistry C
·
2024
·
IF 3.3
Caiyi Jiang,Ming Hou,Li Yang,Shenghui Guo,Guo Yang,Bo Xing,Yi Wang,Dongzheng Wang,Xiaolin Shi
Fe–N co-doped carbon catalyst has received increasing attention in the field of organic wastewater treatment because of its unique structure and outstanding activity. However, the reusability, catalytic activity, and pH working range are still a great challenge for future application. Herein, a novel αFe-HM@C-T catalyst was prepared by pyrolyzing a mixture of starch and heme and was analyzed by TEM, H2-TPR, XRD, BET, XPS, FTIR, and Raman spectrum. Meanwhile, αFe-HM@C-T catalysts show the highest catalytic performance due to abundant porous structure, higher redox property, and unique Fe–Nx configuration. The rhodamine B (RhB) could be almost completely degraded within 30 min on the 5Fe-HM@C-850, and recovery rates of catalytic activity of 96% and 91.8% were achieved in peroxydisulfate (PDS) and H2O2 systems with an extensive buffer pH range. Furthermore, mechanistic insights by quenching experiments and EPR verified the high removal efficiency of RhB mainly attributed to indirect oxidation of SO4•–, •OH, and 1O2 in both systems, and the potential mechanism was proposed.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Zhichong Wang,Kaixuan Wang,Yajuan Pan,Qing Ye,Chenxi Zhang,Dan Zhang,Yanxia Zhao,Yongliang Cheng
The incorporation of oxyanion groups offers a greater potential for enhancing the activity of oxygen evolution reaction (OER) electrocatalysts compared to traditional metal cations doping, owing to their unique configurations and high electronegativity. However, the incorporation of oxyanion groups that differ from those derived from the oxidation of anions in transition metal monoxides poses significant challenges, thereby limiting further applications of oxyanion group modification approach. Herein, we present a novel sulfate salt assistant approach to fabricate Fe-doped Ni 2 P modified with SO 4 2− /carbon (Fe-Ni 2 P-S/C) nanofibers as highly efficient OER electrocatalyst. The optimized Fe-Ni 2 P-S/C nanofibers display superb OER activity, requiring low overpotentials of 266, 323, and 357 mV at 100, 500, and 1000 mA cm −2 , respectively. Theoretical calculations reveal that the co-adsorption of PO 4 3− and SO 4 2− on the surface of reconstructed electrocatalyst can reduce the energy barrier of rate-determining step, thereby resulting in enhanced OER activity. The present study emphasizes the crucial role played by anion groups in OER activity as well as proposes a novel approach for incorporating anion groups into electrocatalysts.
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 3
·1520-1529
·
IF 1.134
Deng Senlin,Lv Guojun,Zhai Yi,Yang Zebin,Zhu Yongqiang,Li Haichao,Wang Fumin,Zhang Xubin
Highly active and stable framework Fe-doped ZSM-5 (f-Fe-ZSM-5) zeolites with different Fe contents, which were synthesized using a facile one-pot hydrothermal method, could effectively resolve the loss of iron element during the catalytic degradation of basic dyes. The successful introduction
of Fe species into the framework of ZSM-5 was confirmed by elemental mappings, Fourier transform infrared (FT-IR) spectroscopy and Ultraviolet-visible spectroscopy (UV-vis spectra). The operational parameters, such as Fe content, H2O2 concentration, reaction temperature,
types of dyes as well as the stability of the synthesized samples were extensively evaluated. It was demonstrated that the f-Fe(0.10)-ZSM-5 exhibited an efficient catalytic ability and excellent stability even after seven consecutive runs. The degradation efficiency of f-Fe-ZSM-5 for basic
dyes was higher than that for acid dye. Therefore, f-Fe-ZSM-5 zeolites may present major potential for the treatment of basic dyes waste water without adjusting the initial pH value.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Li-Ping Zong,Ling-Yu Ruan,Junji Li,Robert S. Marks,Jun-Song Wang,Serge Cosnier,Xue-Ji Zhang,Dan Shan
Enzyme mimetics have attracted wide interest due to their inherent enzyme-like activity and unique physicochemical properties , as well as promising applications in disease diagnosis, treatment and monitoring. Inspired by the attributes of nonheme iron enzymes , synthetic models were designed to mimic their capability and investigate the catalytic mechanisms . Herein, metal-organic gels (Fe-MOGs) with horseradish peroxidase (HRP) like Fe-N X structure were successfully synthesized though the coordination between iron and 1,10-phenanthroline-2,9-dicarboxylic acid (PDA) and exhibited excellent peroxidase-like activity. Its structure-activity relationship and the in-situ electrochemiluminescence (ECL) detection of H 2 O 2 secreted by Hela cells were further investigated. The highly dispersed Fe-N X active sites inside Fe-MOGs were able to catalyze the decomposition of H 2 O 2 into large amounts of reactive oxygen species (ROS) via a Fenton-like reaction under a low overpotential. Due to the accumulation of ROS free radicals , the luminol ECL emission was significantly amplified. A proof-of-concept biosensor was constructed with a detection limit as low as 2.2 nM and a wide linear range from 0.01 to 40 μM. As a novel metal organic gels based enzyme mimetic, Fe-MOGs show great promises in early cancer detection and pathological process monitoring.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Tian Meng,Qun Li,Mengxia Yan,Dewen Wang,Libing Fan,Xiaojuan Liu,Zhicai Xing,Xiurong Yang
Self-reconstruction of oxygen evolution reaction (OER) catalyst, especially metal (oxy)hydroxides or oxides, has attracted much attention. Herein, an in-situ self-reconstruction process for Ni, Fe, Zn ternary-metal hydroxides (NFZ-TH) involving significant morphology transformation, and self-modulated electronic structure change of Ni and Fe owing to the etching of Zn species under anodic polarization potential is revealed. NFZ-TH derived materials, undergoing in-situ self-reconstruction (NFZ-TH-SR), exhibits superior OER performance (η = 217 mV @ j = 10 mA cm −2 geometry ) and excellent stability over a period of ~48 h. Nano-pitted surface resulting from etching of Zn species improves the electrochemical surface area. Meanwhile, in NFZ-TH-SR, large amounts of defects induced defect-/corner-sited Fe and adjustability of NiOOH species are verified by Mössbauer spectra and in-situ Raman spectra respectively. Density functional theory calculations give insight that both defect-/corner- sited Fe and Ni at next-nearest-neighbour defect-site have high activity. This paper helps understand that the proposed in-situ self-reconstruction strategy can improve the electrochemical performance of OER catalysts.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
·
IF 6.2
Chunqi Yu,Yingqi Wang,Ke Wang,Shuai Zhang,Xiaopeng Hu,Yiwei Liu,Jiajia Xi
Chlorpyrifos (CPF) poses severe environmental and health risks, driving the need for on-site monitoring tools. This study presents a novel dual-recognition colorimetric sensor for ultrasensitive detection of CPF by coimmobilizing molecularly imprinted polymers (MIPs) and aptamers onto bimetallic Fe,Zr-MOF composites. The resulting Fe,Zr-MOF/Apt/MIP hybrid synergistically merges the structural robustness of MIPs with the conformational specificity of aptamers, while also functioning as both a nanocarrier and a peroxidase mimic. Notably, CPF binding sterically hinders substrate diffusion to catalytic sites, enabling quantitative detection via dose-dependent inhibition of TMB oxidation. The optimized sensor exhibits exceptional performance: a broad linear range (1–120 ng mL–1), ultralow detection limit (0.105 ng mL–1), and high specificity against interferents. When validated with complex matrices (apples, pears, and cabbage), it achieved satisfactory recoveries (91.0–110.0%). This work establishes a field-deployable strategy for on-site pesticide monitoring in food and environmental safety.
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Environmental Science-Nano
·
2020
·Vol. 7
·期 9
·2573-2583
·
IF 7.683
Jie Yang,Jia Li,Dickon H. L. Ng,Ping Yang,Wenning Yang,Yong Liu
Self-propelled micro- and nanomotors are a current research focus and have shown attractive potential in environmental applications. Here, we report a biomass approach to construct a novel tubular micromotor decorated with a nanozyme/natural enzyme hybrid, which integrated the advantages of the self-propelled movement, selectivity of a natural enzyme and catalytic activity of artificial nanozymes. Such a micromotor had a unique hierarchical structure where laccase immobilized-Fe-BTC MOF nanoparticles grew uniformly on Mn2O3–NiFe2O4 nanosheets, which was constructed using natural kapok fiber as a template. This laccase-integrated Fe-BTC/NiFe2O4 micromotor was capable of self-propulsion with a speed of 120 μm s−1 by oxygen bubbles via the decomposition of H2O2 catalyzed by Mn2O3. Owing to the incorporation of autonomous motion with high selectivity of natural laccase and high peroxidase-like activity of the Fe-BTC/NiFe2O4 nanozyme, these micromotors exhibited much higher catalytic activity to methylene blue degradation than their passive counterparts. Besides as a substrate to accommodate laccase immobilized-Fe-BTC, magnetic NiFe2O4 also enabled the remote magnetic control on the movement direction.
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DRUG DELIVERY
·
2025
·
IF 8.1
Jinguo Li,Yuhao Zhang,Changyu Shao,Yining Bai,Puxiu Wang,Tianyang Ren
Triple-negative breast cancer (TNBC) is the most aggressive type of breast cancer and is characterized by high invasiveness, rapid recurrence, and poor prognosis. To date, the ferroptosis-combined therapies have exerted their potential in the TNBC treatments via multi-mechanisms. Here, we reported a doxorubicin (DOX)–Fe complex and RSL3 co-loaded liposomes (DOX–Fe/RSL3@LIPs) for ferroptosis-enhanced chemotherapy on TNBC tumors. This nanoformulation performed a uniform spherical structure with a mean particle size of 126.9 nm, a zeta potential of −3.56 mV, and high colloidal stability. The pH-responsive dissociation of DOX–Fe and release of DOX were conducive to drug accumulation in the tumor microenvironment and tumor cells, meanwhile efficiently suppressed free DOX leakage in the blood circulation, potentially reducing the cardiotoxicity of DOX. In vitro cell and in vivo pharmacodynamic studies demonstrated a favorable anticancer effect of the DOX–Fe/RSL3@LIPs on 4T1 tumors by synchronously delivering biologically active DOX, Fe2+, and RSL3 to the tumor sites. DOX induced tumor cell death through a dual pathway of apoptosis/ferroptosis, and promoted the H2O2 generation. The tumor cell ferroptosis was observably enhanced via supplements of the ferrous ions and H2O2, and RSL3-derived GPX4 inhibition to severely destroy the oxidation balance in cells. In this paper, the DOX–Fe/RSL3@LIPs have exerted a synergistic anticancer effect on TNBC by combining ferroptosis and conventional chemotherapy, and made a meaningful exploration of new strategies for TNBC therapy.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Mohan Huang,Kun Zhao,Zhiying Bai,Dawei He,Jiaqi He,Yongsheng Wang
To design and construct high-performance asymmetric supercapacitors (ASC), we use the same Fe-based metal-organic framework (MIL-88A) as the precursor for the first time to prepare iron-cobalt-nickel ternary metal hydroxides (Fe-Co-Ni-OH) and Fe 2 O 3 compounded with reduced graphene oxide (Fe 2 O 3 /RGO-1). As a positive electrode, Fe-Co-Ni-OH has a specific capacitance of 1065 F g −1 at 1 A g −1 and exhibits excellent rate performance and cycle stability due to its unique spindle-like structure of the surface growth nanosheets and the synergistic effect between the three metals. The introduction of RGO effectively connects the independent spindle-like Fe 2 O 3 and enhances the conductivity and structural stability of the material. So that the Fe 2 O 3 /RGO-1 negative electrode has a specific capacitance of 734 F g −1 at 1 A g −1 , and its cycle stability is significantly improved compared with the single Fe 2 O 3 (increasing from 64 % to 85 %). The constructed Fe-Co-Ni-OH//Fe 2 O 3 /RGO-1 ASC possesses a satisfactory energy density of 43.11 Wh kg −1 at a power density of 800 W kg −1 , which is superior to parts constructed with similar material compositions in the same period. This research provides a new perspective for developing high-performance, low-cost, and environmentally friendly green energy storage devices.
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