DALTON TRANSACTIONS
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2023
·Vol. 52
·期 45
·16661-16669
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IF 4
Yi Dong,Yuchi Zhang,Yan Xu
Because of their remarkable qualities including changeable chemical composition, good redox characteristics, and ease of manufacture, non-enzymatic glucose sensors based on metallic hydroxides have attracted much interest. However, enhancement of their peroxidase-like catalytic activity is challenging due to their poor substrate affinity and low electrical conductivity, affecting electron transfer. Herein, a three-dimensional hierarchical architecture of Ni/Co-decorated-Fe layered double hydroxide (NiCoFe-LDH) was straightforwardly constructed on Fe foam (FF) via a feasible corrosion strategy, and the non-enzymatic glucose sensing properties of the NiCoFe-LDH/FF electrode were investigated. In the linear detection range of 0.010–0.1 mM, the electrode exhibits an extreme sensitivity of 5717 μA mM−1 cm−2 with a low threshold for glucose determination of 2.61 μM (S/N = 3) and a short reaction time (∼2 s), which is ascribed to its specific intertwined nanosheet-like morphology with rich electron transfer passages that enhance conductivity and improve the accessibility to more active catalytic sites for glucose oxidation. Moreover, the electrode shows excellent selectivity, good stability, and promising practicality for glucose detection in actual serum samples. These results indicate that the feasible corrosion approach towards the simple synthesis of trimetallic layered double hydroxide electrodes results in improved affinity and stability, holding new prospects for achieving reliable, cost-efficient, and eco-friendly non-enzymatic glucose detection.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Liqin Kong,Feng Hong,Peng Luan,Yiping Chen,Yaoze Feng,Ming Zhu
The development of biosensors capable of assessing umami intensity has elicited significant attention. However, the detection range of these biosensors is constrained by the sensing components and strategies used. In this study, we introduce a novel competitive, ultra-high-sensitivity electrochemical impedance biosensor by utilizing composite nanomaterials and T1R1 as a composite signal probe. Pd/Cu-TCPP(Fe) had a substantial surface area, effectively enhancing the loading capacity of the T1R1 and thus augmenting the biosensor's recognition precision. Furthermore, the Pd/Cu-TCPP(Fe) elevated peroxidase-like activity catalyzed the formation of insoluble precipitates of 4-CN, resulting in cascaded amplification of the impedance signal. The remarkable catalytic activity of the composite signal probe endowed the biosensor with exceptional analytical performance, featuring a detection limit of 0.86 pg/mL and a linear detection range spanning from 10 to 10000 pg/mL. Successful application of the biosensor for umami substance detection in fish was also demonstrated, signifying its substantial potential in food-flavor evaluation.
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COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Qing Wu,Bolin Xiao,Qianli Liu,Hao Deng,Ziyi Ye,Yating Li,Renjie Yao,Jianfeng Zhu
The liable interfacial delamination of carbon fiber composites is a long-lasting problem that restricts its widely application. One promising route is to hybridize fiber with nano-particles on account of their prominent mechanical properties and huge specific surface area, while trial using biobased nanoparticles are in its infancy. Mussel adhered firmly to the reef relies on its bushy byssal threads, which correlates with chelation of ferric ions with catechol-containing proteins. Inspired by this, we deposited synergistic bio-based polydopamine (PDA)-Fe complex nanospheres and silane coupling agent on carbon fiber by simply impregnation, which delivers increment of 56.4% in interfacial shear strength (IFSS) in epoxy matrix relative to untreated fiber composites . Results suggest that the improved epoxy wetting behavior that imparts full infiltration, the excellent adhesivity that eliminates weak interface layer , as well as strong but reversible PDA-Fe chelate crosslinks that advance tress transfer and energy dissipation , which are critical to IFSS growth. This work provides a new and attractive bio-nanomaterial of PDA-Fe in interfacial engineering of composites.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Aotian Gu,Chunhui Gong,Manli He,Kaiwei Chen,Xinyu Zhou,Peng Wang,Kai Chen,Yan Jiao,Yi Yang
Advanced oxidation processes activated by transition metal have attracted much attention for their excellent performance in the removal of organic pollutants , but the development of efficient and environmentally benign catalysts is still a significant challenge. In this work, carbon shell encapsulating Co/Fe sulfide nanoparticles (Co/Fe@SC X ) were synthesized by pyrolysis of the resorcinol-formaldehyde (RF) coated MIL-101 @ZIF-67 bimetal Metal-organic frameworks (MOFs). In the degradation of TCP , Co/Fe@SC 600 exhibited the highest TCP removal rate (97.33%) and reaction rate constant (k obs ) (0.169 min −1 ), as well as the mineralization rate of up to 60.19%. Compared to other prepared catalysts, Co/Fe@SC 600 not only possessed excellent catalytic activity, but also exhibited the lowest Co ion leaching concentration, good stability and high resistance to environmental factors. Further studies showed that the non-radical pathway dominated by 1 O 2 contributed most to the TCP degradation, and the radicals also played the indispensable role. The potential TCP degradation pathways in the reaction system was also investigated by analyzing the intermediate products during the degradation process. Overall, this study may provide some interesting insights into the design of advanced catalysts.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yong He,Xiao Kang,Hui-wen Xiong,Lei Zhang
Spinel composite is being considered for electrode materials in molten salt electrolysis, aiming to improve high-temperature stability and conductivity. Multi-phase composites with the general formula of (Fe 1-3 x - y Ni y Co x Cr x Mn x ) 3 O 4 ( x = 0.03, 0.06, 0.09, y = [1-2 x ]/3) were prepared via in situ SPS method. The composites were confirmed to consist of spinel and rock-salt phases through XRD and SEM analysis. Compared to the Ni–Fe–O system, the doping of Cr, Mn and Co improved the phase stability of the spinel during SPS, but hindered the shrinkage process. These composite exhibited low thermal diffusivity (1.236–2.481 m 2 /s, room temperature) and low coefficient of thermal expansion (9.8 - 14.4 × 10 −6 K −1 , 400–800 °C). Moreover, the composite with x = 0.06 and y = 0.29 exhibit 94.4 % lower permittivity, 7 times higher dielectric loss (at 40 Hz) and 26.6 % lower high-temperature conductivity (at 800 °C) than that of Ni–Fe–O system. This work demonstrates the enhanced thermal and electrical properties of spinel-based composites, which can provide inspiration to researchers and promote the development of high-temperature electrodes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yan Dong,Sheng Liu,Wenjing Deng,Hao Zhang,Guangyi Liu,Xiaolei Wang
Heteroatom doping is a possible way to regulate the catalytic capability of electrocatalysts for hydrogen evolution reaction (HER). This work focuses on the development of bimetallic Cobalt-Iron sulfide ultrathin nanosheets supported on the graphitic carbon nitride (g-C 3 N 4 ) catalyst as efficient HER electrocatalysts (CoS 2 /FeS 2 /CN) with good stability at wide pH value. The ultrathin nanosheet exposes more active sites and enhances the catalyst activity. Electrochemical experiments demonstrate that adding g-C 3 N 4 and Fe to CoS 2 increases its catalytic activity and stability. Furthermore, g-C 3 N 4 and Fe co-doped with CoS 2 can modulate electronic structures on the interface. The CoS 2 /FeS 2 /CN exhibits outstanding HER performance, reaching a current density of 10 mA cm −2 with overpotentials of only 76.5 mV in an acidic solution and 175.6 mV in an alkaline solution. It also demonstrates exceptional durability, superior to commercial platinum/carbon catalysts. This work introduces a promising approach for designing low-cost, high-performance HER electrocatalysts with a wide pH range.
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ChemNanoMat
·
2023
·Vol. 9
·期 12
·e202300414
·
IF 3.8
Yanqi Xu,Hejun Liu,Yixiong Wu,Qian Wu,Cunjun Li,Xinyu Wang,Haiqing Qin,Aimiao Qin,Linjiang Wang
Graphical The Co 3 Fe 1 -LDH exhibits excellent ECO of BA performance in alkaline owing to the Fe electron centers of the Fe-based LDHs catalysts can regulate the d band of LDHs overlap, optimize the active local structure of LDHs, and then enhance the electrocatalytic oxidation performance. Replacing sluggish oxygen evolution reaction (OER) with electrocatalytic oxidation (ECO) of alcohols was a promising hotspot due to its advantages of requiring low potential, inhibiting mixing of gases, and forming value-added products. In the ECO of alcohols process, Fe electron centers of Fe-based layered double hydroxides (LDHs) can regulate the d band of LDHs overlap, optimize the active local structure of LDHs, and then enhance the electrocatalytic oxidation performance. In this work, Co x Fe y -LDHs nanosheets with different ratios of Co/Fe were prepared for selective ECO of benzyl alcohol (BA) to benzoic acid (BAC). Comprehensive characterizations revealed that the adjustment of bandgap and OH species adsorption of Co x Fe y -LDHs resulted in the appropriate thermodynamic driving force, which improved the electrical conductivity of Co x Fe y -LDHs and enhanced their ECO of BA. Especially, the as-prepared Co 3 Fe 1 -LDH showed intriguing electrocatalytic activity and only required a potential of 1.51 V ( vs . RHE) to achieve a total current density of 50 mA cm −2 in alkaline solution containing 10 mM BA with a conversion (96.79 %) of BA and selectivity (94.93 %) of BAC, which was 60 mV lower than that of OER. After six cycles, Co 3 Fe 1 -LDH still achieved 94.74 % conversion of BA and 92.10 % selectivity of BAC without significant degradation.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 41
·14973-14981
·
IF 4
Xiangyu Zhang,Hong Li,Yanhui Li,Xianhui Wang,Hongbin Wang,Wenrong Yang,Jingquan Liu,Da Li
To replace the current expensive precious metal catalysts for water electrolysis, it is important to develop inexpensive and powerful bifunctional catalysts for hydrogen production. It is an effective way to improve catalytic performance using excellent templates and elemental doping. Here, a hierarchical structure Fe-Co3S4/MoS2 was synthesized using an Fe–ZIF precursor prepared by ion exchange, followed by hydrothermal sulfuration and annealing. It required overpotentials of only 93 mV and 243 mV to achieve a current density of 10 mA cm−2 in the HER and OER, respectively. It also showed excellent catalytic performance for overall water splitting, requiring only 1.42 and 1.71 V to achieve current densities of 10 and 100 mA cm−2 in 1 M KOH. The catalyst also demonstrated excellent ultra-long-term stability. The superb catalytic performance and stability can be attributed to the Fe doping, exposing more active sites while retaining the highly stable framework of the ZIF. The component modulation of Co3S4 and MoS2 by Fe doping induced high intrinsic activity and excellent transfer coefficients. This work presents a novel approach to prepare noble metal-free catalysts with highly stable rich interfaces and defects for overall water splitting.
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Biomaterials Science
·
2023
·
IF 6.6
Tingting Zhao,Ting Shu,Jinrong Lang,Ziyu Cui,Ping Li,Shi Wang
Nitric oxide (NO) is a crucial cell-signaling molecule utilized in numerous physiological and pathological processes. Monitoring cellular levels of NO requires a sensor with sufficient sensitivity, transient recording capability, and biocompatibility. Owing to the large surface area and high catalytic activity of the metal–organic framework, Fe–BTC was used for the modification of screen-printed electrodes (SPEs). This study investigates the electrochemical sensing of NO on modified SPEs. Additionally, the introduction of a cell-adhesive molecule, arginine–glycine–aspartate peptide (RGD), considerably improved the cytocompatibility, resulting in superior cell attachment and growth on the SPE. The Fe–BTC/RGD-modified SPE (Fe–BTC/RGD/SPE) exhibited electrocatalytic NO oxidation at 0.8 V, demonstrating a linear response with a detection limit of 11.88 nM over a wide concentration range (0.17–47.37 μM) and a response time of approximately 0.9 s. Subsequently, the as-obtained Fe–BTC/RGD/SPE was successfully utilized for the real-time detection of NO released from human endothelial cells cultured on the electrode. Therefore, the study undertaken shows remarkable potential of Fe–BTC/RGD/SPE for practical applications in biological processes and clinical diagnostics.
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WATER RESEARCH
·
2023
·
IF 12.8
Wenyu Liu,Li Long,Zhe Yang,Li Wang,Qimao Gan,Shenghua Zhou,Pulak Sarkar,Hao Guo,Chuyang Y. Tang
Nanofiltration technology has been applied in a variety of water treatment scenarios. However, conventional thin-film composite (TFC) membranes fail to remove emerging organic micropollutants (OMPs) efficiently. Here we applied thin-film nanocomposite membrane with an interlayer (TFNi) of Fe (III)-tannic acid to remove various types of OMPs, such as endocrine disrupting chemicals (EDCs), pharmaceutically active compounds (PhACs), and perfluoroalkyl substances (PFASs). Compared to the pristine TFC membrane, TFNi membrane exhibited crumpled morphology and its rejection layer was denser, better cross-linked and possessed smaller average pore size with narrower distribution. Significant enhancement in water-OMPs selectivity of PhACs and PFASs was observed. The mechanism lies in the effects of interlayer in improving the membrane permeance to water and meanwhile reducing the permeance to some OMPs by enhancing size exclusion effects. This work confirms the effectiveness of using TFNi membrane to simultaneously enhance the OMPs rejection and water permeance. The unraveled mechanism might inspire the future development of high-performance nanofiltration membranes targeting OMPs removal.
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Nanomaterials
·
2023
·Vol. 13
·期 18
·2496
·
IF 5.3
Mengmeng Pan,Ming Wang,Linjiao Yang,Yongli Song,Ming Jiang,Xu Yu,Li Xu
Alkaline phosphatase (ALP) is a phosphomonoester hydrolase and serves as a biomarker in various diseases. However, current detection methods for ALP rely on bulky instruments, extended time, and complex operations, which are particularly challenging in resource-limited regions. Herein, we synthesized a MOF-derived Fe-N-C nanozyme to create biosensors for the coulometric and visual detection of ALP. Specifically, we found the Fe-N-C nanozyme can efficiently oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to generate blue-colored tetramethyl benzidine (TMBox) without the need for H2O2. To construct the biosensor, we incorporated the ALP enzymatic catalytic reaction to inhibit the oxidation of TMB by Fe-N-C oxidase nanozyme. This biosensor showed rapid and highly sensitive detection of ALP in both buffer and clinical samples. The limit of detection (LOD) of our approach could be achieved at 3.38 U L−1, and the linear range was from 5 to 60 U L−1. Moreover, we also developed a visual detection for ALP by using a smartphone-based assay and facilitated practical and accessible point-and-care testing (POCT) in resource-limited areas. The visual detection method also achieved a similar LOD of 2.12 U L−1and a linear range of 5–60 U L−1. Our approach presents potential applications for other biomarker detections by using ALP-based ELISA methods.Keywords:metal-organic framework;nanozyme;oxidase-like enzyme;alkaline phosphatase;visual detection
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xu Pan,Junhong Wang,Ye Chen,Qing Wen,Cunguo Lin,Haiping Gao,Zhenghui Qiu,Liuqingying Yang
As a green conversion device, the electricity performance of microbial fuel cell (MFC) was mainly affected by the extracellular electron transfer (EET) process of the biofilm. This paper presented the fabrication and characterization of carbonized derivatives composed with alloy nanoparticles (NPs) derived from Zr-based metal organic frameworks, which exhibited biocompatibility and high electrocatalytic activity. As the results of bioanodes, the charge transfer resistance decreased from 5.60 Ω (Zr-C) to 0.61 Ω (Fe/Ni-Zr-C), and the exchange current density increased from 0.56 mA/cm 2 (Zr-C) to 1.40 mA/cm 2 (Fe/Ni-Zr-C). Electrochemical tests and density functional theory (DFT) confirmed that Fe-Ni alloy NPs promoted the rapid transfer of electrons within the electrode and improved the EET efficiency mediated with the flavin compounds. High throughput sequencing and PICRUSt verified the specific screening function of Fe-Ni alloy for electrogenic bacteria (mainly Geoalkalibacter) and the promoting effect on the expression of flavin-related proteins in biofilm. The maximum power density of Fe/Ni-Zr-C MFC (5.09 W/m 2 ) was higher than that of Ni-Zr-C (4.19 W/m 2 ), Fe-Zr-C (3.58 W/m 2 ) and Zr-C (3.09 W/m 2 ) MFCs. Fe/Ni-Zr-C material can act as an economical and high-performance bioelectrocatalyst to improve the power generation capability of MFC by improving EET rate and energy conversion efficiency of biofilm.
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