Molecular Catalysis
·
2023
·
IF 4.6
Lihai Wei,Dexing Meng,Junhan Mao,Qianqian Jiang,Huabo Huang,Jianguo Tang
Oxygen Evolution Reaction (OER) catalysts that overcome low energy barriers to improve the reaction efficiency of the OER are important for the development of future green energy sources. Herein, NiFe-PBA@IF layered nanoflowers were successfully prepared by etching iron foam (IF) using Prussian blue-like (PBA) material as a precursor. Notably, the fractured PBA nanosheets prepared by etching at room temperature had a suitable growth gradient and growth environment with the homogeneous nucleation environment, compared to the conventional method. In this environment, a layered NiFe-PBA structure can be formed on the surface of IF, enabling efficient green synthesis, reducing ecological and economic costs, and providing a clear source of catalytic activity. More importantly, NiFe-PBA@IF has a nanoparticle structure anchored on NiFe-PBA stacked nanoflowers, which can expand the surface roughness and electrochemical active area of the sample, so the OER performance in 1 M KOH is 253 mV@10 mA·cm −2 . The green and direct synthesis of PBA electrocatalysts can provide new ideas for the efficient synthesis of other OER electrocatalysts at room temperature and will further provide an effective template for the industrial application of OER electrocatalysts.
研究领域:
材料科学
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电化学
·
能源科学
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DOI
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Xin Hua,Tongxiao Zhao,Xueqin Gui,Baokang Jin
In this paper, a label-free electrochemical immunosensor for sensitive detection of prostate antigen (PSA) was developed based on a NiFe PBA/AuNPs composite. The prostate antigen antibody was immobilized and the immunosensor was constructed by using a glassy carbon electrode modified with a nanocomposite consisting of nickel–iron Prussian blue analog (NiFe PBA) and gold nanoparticles (AuNPs). Due to the good biological affinity of AuNPs for biomolecules, as well as the porous nanostructure and regular shape of NiFe PBA, NiFe PBA/AuNPs nanocomposites significantly improve the electron transport rate, while achieving excellent performance for the sensor. Due to the interaction between the antibody and the antigen on the modified electrode, the current signal of the NiFe PBA itself is reduced due to the redox changes in Fe2+ and Fe3+, which can be determined by differential pulse voltammetry (DPV). Therefore, the monitoring of prostate antigen detection is realized. Under optimal experimental conditions, the immunosensor exhibited excellent detection performance with a dynamic response range from 0.5 pg mL−1 to 1000 pg mL−1 for the PSA concentration and a detection limit of 0.23 pg mL−1 (S/N = 3). In addition, the PSA aptasensor has good selectivity, high stability, and satisfactory reproducibility and has broad potential in clinical research and diagnostic applications.
研究领域:
生物医学工程
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分析化学
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纳米技术
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Ruigeng Yang,Yueru Wei,Mengyang Zhao,Mengxiao Shi,Yongxing Zhao,Pengchao Sun
The abuse of antibiotics has led to the emergence of multidrug-resistant bacterial strains worldwide, which greatly threatens human health. In the present work, we developed single-atom catalysts (SACs) with atomically dispersed Fe as catalytic sites (Fe-SACs) to combat multidrug-resistant bacteria by elevating cellular reactive oxygen species (ROS). Our intensive studies confirmed that Fe-SACs were successfully prepared and exhibited excellent catalase (CAT)-, oxidase (OXD)-, and peroxidase (POD)-like activities. To enhance water dispersibility, biosafety and the interactions between the nanodrugs and gram-positive bacteria, phenylboronic acid group-functionalized carboxylated chitosan (CCS-PBA) was coated on the surface of Fe-SACs to yield [email protected] for in vitro and in vivo studies. The synergistic catalytic activity and photothermal activity of [email protected] effectively overcame multidrug-resistant bacterial strains ( MRSA) in vitro and significantly accelerated wound healing in vivo , suggesting the great potential of SACs to overcome infectious disease caused by multidrug-resistant bacteria.
研究领域:
纳米技术
·
细菌学
·
材料科学
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生物医学工程
·
药学
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 32
·11297-11302
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IF 4
Yin Huang,Yaoyao Pan,Xiaoyu Huang,Guangzheng Xu,Xiuhua Wang
Finding effective and affordable non-noble metal catalysts is one of the most important yet difficult tasks because of the sluggish kinetics of the oxygen evolution reaction (OER). Therefore, we synthesized vanadium-doped CoFe PBA nanosheets on nickel foam in a single step to change the electronic structure with metal doping. The sheet structure facilitates charge transfer, while vanadium doping modifies the electronic structure to enhance the catalytic activity. With just a 229 mV overpotential needed in the OER reaction to reach 10 mA cm−2, the as-synthesised electrocatalyst demonstrates high electrocatalytic activity. The produced electrocatalyst can operate at a current density of 10 mA cm−2 for 12 h, and it displays outstanding stability even at a high OER current density of 100 mA cm−2 for 12 h. This study will contribute to the development of efficient and affordable non-noble metal-based electrocatalysts.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2020
·Vol. 22
·期 2
·1-12
·
IF 2.132
Sun Xueying,Li Siqi,Liu Rongmei,Sun Xiulun,Liu Xinjie,Li Anran,Li Wen
In this work, we designed a simple hydrothermal synthetic method for a ZnCo-PBA@α-Co(OH) 2 nanosphere@nanosheet material with good electrochemical properties. The obtained material had a specific capacitance of 423.92 F g −1 at 1 A g −1 and a cycling retention ratio of 78.48% after 1000 cycles at 5 A g −1 . A hybrid supercapacitor device (ZnCo-PBA@α-Co(OH) 2 //AC) assembled with activated carbon as the negative electrode had a specific capacitance of 122.4 F g −1 at 1 A g −1 , a cycling retention rate of 73.53% after 5000 cycles at 5 A g −1 , and a very high energy density of 49.13 Wh kg −1 at power density of 1734.0 W kg −1 . The significantly improved electrochemical performance of the ZnCo-PBA@α-Co(OH) 2 nanocomposites can be attributed to the positive synergistic effects of the porous structure of the PBA material and the large specific surface area of the α-Co(OH) 2 nanosheets, on the ion permeability and number of active sites in the reinforcing material; thus, this composite is a potential material for use in future energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
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.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Bingbing Cui,Chuanpan Guo,Zhihong Zhang,Guodong Fu
Heterojunction engineering is an acceptable strategy in promoting the separation efficiency of electron/hole pairs in the photochromic process. Here, a series of novel solid-state photochromic ZnCo-PBA@WO 2.72 heterojunctions have been designed and prepared in the current study. The cubic ZnCo-PBA were selected as templates to directly grow WO 2.72 amorphous layer using phosphotungstic acid (PW 12 ) as precursors with the assistance of polyvinyl pyrrolidone (PVP). The as-obtained ZnCo-PBA@WO 2.72 heterojunctions have a core–shell structure and the appropriate band energy promote the UV-generated electrons transport from ZnCo-PBA to WO 2.72 . Consequently, the ZnCo-PBA@WO 2.72 heterojunctions exhibit excellent photochromic performance, converting from white to light-grey in 10 s and finally turning into dark-grey in 60 s under UV lamp stimulation. Meanwhile, the WO 2.72 outer layer was more easily in contact with oxygen in air and thus speeds up the oxidation process of W 5+ to W 6+ , allowing the colored ZnCo-PBA@WO 2.72 heterojunctions to return to their original colorless condition within 15 min. The solid-state photochromic ZnCo-PBA@WO 2.72 heterojunctions was then used as repeatable information storage media, data encryption and decryption based on coloration-decoloration behaviors. This study presents a meaningful way to integrate WO 2.72 with MOFs to expand the range of photochromic materials and further to broaden theirs application in optical devices.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Xiaoqin Li,Huizi Lin,Xuwei Chen,Fenqiang Luo,Rong Zhang,Xiaoyan Deng,Youxiu Lin,Dianping Tang,Wenqiang Lai
Colorimetric immunoassays are widely used for biomarker detection, offering advantages of simplicity, sensitivity, and cost-effectiveness. Recent advancements focus on improving the catalytic activity of nanozymes for enhancing the sensitivity and accuracy of such assays. Bimetallic CuCo Prussian blue analog (CuCo PBA) has emerged as promising candidates due to their excellent peroxidase-like activity. However, their instant synthesis and integration into immunoassays for the rapid detection of biomarkers like carcinoembryonic antigen (CEA) remain underexplored. This study presents an innovative approach using CuCo PBA nanozymes for colorimetric immunoassays with immediate generation and application. In this study, CuCo PBA nanozymes were synthesized instantly by reacting Cu 2+ with K 3 [Co(CN) 6 ] (<1 min), and their peroxidase-like activity was exploited for a colorimetric immunoassay system targeting CEA. The system demonstrated a clear blue color change upon the reaction of CuCo PBA with H 2 O 2 and 3,3′,5,5′-tetramethylbenzidine (TMB), enabling sensitive detection. The assay was optimized for various parameters, including pH, temperature, and material ratio. A linear response was obtained for CEA detection over a concentration range of 0.05–60 ng/mL with a limit of detection (LOD) of 22 pg/mL. The integration of glucose oxidase (GOx) mediated the generation of H 2 O 2 , triggering the colorimetric reaction. This instantaneous CuCo PBA-based system effectively detected CEA in human serum samples, highlighting its potential for rapid diagnostic applications. This work introduces a novel approach for rapid and sensitive colorimetric immunoassays using CuCo PBA nanozymes that are synthesized on-demand and immediately applied. The system allows for efficient CEA detection with an exceptionally low detection limit, offering great potential for clinical diagnostics. The instant generation and application of CuCo PBA nanozymes in immunoassays represent a significant advancement in point-of-care testing technologies.
研究领域:
生物化学
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医学诊断
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纳米技术
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 1
·192-202
·
IF 3.925
Huanhuan Wang,Qi Qu,Zhiming Liu,Yan He,Jiangshan Gao
Herein, we report a micro-mix strategy for the continuous and large-scale synthesis of Ni–Co PBA nanoparticles. The technique presented in this study allows the particle size to be controlled in the 165 nm to 350 nm range while maintaining a high specific surface area (250 m2 g−1) and cubic structure. Furthermore, the particles exhibit superior dispersity and have a more homogeneous particle size than those prepared using the conventional stirring-mix method due to the drastic collisions that occur in the microchannel during the precipitation process. The present study demonstrates that the concentration of raw materials and feed flow rates in the microreactor effectively control the particle size during mixing. The high concentration of raw materials could decrease the particle size, and the particle size is decreased with the increasing feed flow rates when Re (Reynolds number) <783. Particularly, when 783 < Re < 1567, the particle size remains stable (about 165 ± 10 nm). Additionally, the space-time yield (STY) of Ni–Co PBA is 471 kg m−3 d−1. Finally, the continuous flow microreactor can continuously fabricate large-scale and high-quality Ni–Co PBA crystals with distinct morphological features in a short period of time, providing an effective alternative to the time-consuming and multi-step MOF synthesis method.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 17
·9546-9554
·
IF 11.9
Dongyan Gao,Renning Liu,Dandan Han,Pengcheng Xu,Ping Wang,Yen Wei
Engineering hierarchical heterostructure materials has been recognised as a challenging but prepossessing strategy for developing hybrid supercapacitors. Thus, a Ni–Co PBA derived 3D/1D heterostructure NiO/NiCo2O4 based layered double hydroxide on carbon cloth (CC/NiO/NiCo2O4/NiMn-LDH) as a battery-type electrode was successfully designed via a controllable hydrothermal method. The 3D Ni–Co PBA nanocubes served as scaffolds, providing more space for the nickel-cobalt precursors to grow and then calcine to form a continuous conductive layer of 3D/1D CC/NiO/NiCo2O4. Subsequently, 2D ultrathin NiMn-LDH nanosheets were uniformly anchored on 3D/1D NiO/NiCo2O4, resulting in a unique hierarchical structure that effectively addressed the restacking issue and dead volume of NiMn-LDH, contributing to increased charge and electron transport rates, which promoted the reaction kinetics. Benefiting from abundant interfaces with the open channels of the nanoarchitecture, the CC/NiO/NiCo2O4/NiMn-LDH electrode showed an exceptional specific capacity of 1593.0 C g−1 at 1 A g−1 and a desirable rate performance of 92.9% at a current density of 8 A g−1. Surprisingly, HSC devices can achieve an ideal specific energy of 44.28 W h kg−1 at a specific power of 108.22 W kg−1 with 97.59% cycling durability after 10 000 consecutive charge/discharge cycles. These remarkable properties indicate that the designed novel hierarchical heterostructure electrode has great potential for broad applications in electrochemical energy storage systems.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Ruixin Liu,Feng Shi,Haibing Zhu,Kai Liu,Zijun Lai,Yaoyao Li,Zhanjun Yang,Juan Li
The inherent metal elements and structures of Prussian blue analogue (PBA) nanozymes have restricted their enzyme-mimicking activity. Therefore, the rational regulation of PBA nanozymes to improve their catalytic activity is highly desirable for biosensing applications. Herein, we propose a structure remodeling strategy to construct an open-cage Fe PBA-anchored NiFePBA (NiFe@Fe bis-PBA) nanozyme with significantly enhanced enzyme-mimicking activity. The formation process and mechanism for this bis-PBA nanozyme were studied in detail. Specifically, a cubic NiFePBA precursor was first synthesized and modified with polyvinylpyrrolidone (PVP). With the aid of hydrochloric acid, the added potassium ferricyanide was reduced by PVP and re-coordinated on the surface of NiFePBA to form the NiFe@Fe bis-PBA nanozyme with a special open-cage core–shell structure. The resultant NiFe@Fe bis-PBA nanozyme was further exploited to immobilize secondary antibodies, serving as a novel signal probe for developing highly sensitive electrochemical immunosensors for monitoring tumor markers. The constructed electrochemical immunosensor possesses a very wide linear range of 0.005–100 ng/mL and a low detection limit of 0.89 pg/mL for alpha-fetoprotein with high specificity and acceptable reproducibility and stability. This work offers a general and promising strategy for remodeling PBA nanozymes with a very favorable structure and metal element distribution, which enhances their enzyme-mimicking properties for applications in different fields.
研究领域:
生物传感
·
材料科学
·
医学诊断
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xingyao Zeng,Zhanghao Xu,Hangyu Mo,Jian Zhuang,Zengchao Xing,Yage Xie,Jiawei Qiu,Ji Yu,Guojun Jiang,Xiangyu Ye
Developing efficient absorbents for the cleanup of highly viscous crude oil spills is of critical importance. The current light-to-heat/electric-to-heat methods to reduce the viscosity of crude oil were limited by the complicated preparation processes, weather conditions and potential risk of electrical leakage. Here, a robust superhydrophobic composite Fe 3 O 4 /PAN/PBA nanofibrous aerogel (NFA) with excellent photo/magneto-thermal performance for efficient all-weather viscous crude oil spill remediation was fabricated by integrating facile blend electrospinning and freeze-drying techniques. Due to its superhydrophobicity/superoleophilicity (water contact angle of 151.3° and oil contact angle of 0°) and anisotropic microchannel structure, the composite NFA exhibited rapid adsorption kinetics and ultra-high absorption capacity (54.4 − 97.1 g/g) toward various low-viscosity oils and organic solvents. Meanwhile, it displayed outstanding mechanical recyclability (84.07 % recovery after 200 cycles at 80 % strain) and reusability (86.74 % of the initial capacity after 10 absorption-squeezing cycles). Notably, the composite NFA also showed excellent photo/magneto-thermal conversion efficiency, allowing it to achieve continuous and efficient cleanup of crude oil (recovery rate of 6.67 x10 3 kg m −3 h −1 ) via peristaltic pumping. Therefore, this material holds great potential for all-weather cleanup of crude oil spills.
研究领域:
材料科学
·
环境工程
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）