BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Xiaokang Liu,Mengyao Hu,Minghua Wang,Yingpan Song,Nan Zhou,Linghao He,Zhihong Zhang
Owning to the misuse of the antibiotics in animal husbandry and agriculture, it is highly urgent to determine the quantification of antibiotics in biological systems by the simple, sensitive, and fast method. In this work, a novel nanoarchitecture of Co-based metal-organic frameworks (Co-MOF) and terephthalonitrile-based covalent organic framework (TPN-COF) was synthesized (represented by [email protected] ), followed by the exploitation as the bioplatform of non-label aptasensor for detecting the most frequently used β-lactam antibiotics, ampicillin (AMP). The new porous hybrid material of [email protected] was synthesized by adding the as-prepared TPN-COF into the Co-MOF preparation system. The multilayered [email protected] nanosheets exhibit a high specific surface area (52.64 m 2 g −1 ), nitrogen-rich groups and excellent electrochemical activity. As a result, large amounts of aptamer strands can be bound over the [email protected] nanosheets owning to the strong π–π stacking and hydrogen bonds . When detecting AMP by the electrochemical impedance spectroscopy , the fabricated [email protected] aptasensor exhibits an ultra-low detection limit of 0.217 fg mL −1 within the AMP concentration from 1.0 fg mL −1 to 2.0 ng mL −1 , which was superior to those previously reported in literatures. In addition, this proposed aptasensor also shows high selectivity , good reproducibility and stability, acceptable regenerability, and favorable applicability in human serum, river water and milk. Therefore, the proposed [email protected] aptasensor has a great promise to be applied as a powerful tool in the fields of food safety.
研究领域:
分析化学
·
材料科学
·
生物技术
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Luning Sun,Ruixue Liu,Yizhi Ma,Wei Wang,Yunxiang Yuan,Hongchao Zhang,Sainan Wei,Wei Liang
Near-infrared (NIR) laser countermeasures firing systems and electromagnetic wave shielding are extremely important in military warfare. Herein, a series of biomass-derived carbon flexible textiles with NIR photothermal conversion and microwave absorption capabilities were created by pyrolysis at temperatures ranging from 700 to 1000 °C. A hydrothermal approach was employed to create 2D CoFe-layered double hydroxides (CoFe-LDH), whose positively charged characteristics were securely attached to the hydroxide clusters on the surface of cotton fibers via electrostatic interaction . Subsequently, the adjustable layer spacing of LDH provides ideal in situ growth sites for metal ions and organic ligands of Co MOF . CoFe-LDH@Co MOF@PDMS cotton-derived carbon textiles (CoFe@PCCF) were successfully made using high-temperature pyrolysis, annealed carbonization , and polydimethylsiloxane curing. The intrinsic light absorption of the interwoven and entangled carbon fibers, combined with the plasmonic resonance of its surface metal particles, promotes photothermal conversion of the material, reduces density, and increases absorption during multiple reflections of electromagnetic waves. Furthermore, its qualities can be optimized and modified by modifying parameters like as carbonization temperature and thickness. As a result, CoFe@PCCF-900 shows the minimum reflection loss (RL min ) of −23.03 dB at 1.6 mm thickness and an effective absorption bandwidth (EAB) of 4.53 GHz. The surface temperature of CoFe@PCCF-1000 reaches 74.5 ℃ after 3 seconds of NIR (980 nm, 200 mW) light, indicating quick and stable photothermal conversion. This work provides an opportunity for laser shooting and electromagnetic attenuation low-cost materials.
研究领域:
材料科学
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光学工程
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Qianxilong Wang,Jiakuo Chen,Jiansheng Wang,Xiongfeng Zeng,Ruimin Wang,Yingna Zhao
In this paper, TiO 2 nanotube arrays with gap characteristics were designed and fabricated. Moreover, by adjusting the ratio of metal ions to ligands (1:20), a fully coated Co-MOF/TiO 2 composite photoanode was obtained; Secondly, tests such as XPS and EPR were adopted and combined with theoretical calculations to verify the construction of Type II heterojunctions, which promoted the separation of photogenerated electron-hole pairs and thereby enhanced the cathodic protection effect of the composite photoanode. Finally, to promote green and environmentally friendly anti-corrosion materials, an in-depth study was conducted on the anti-corrosion and anti-pitting effects of composite photoanodes on 304SS with different application areas (1cm 2 ,25cm 2 ,100cm 2 ).
研究领域:
材料科学
·
电化学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Biao Jia,Baoshan He,Renli Liu,Jinping Yang,Wenjie Ren,Zhiguang Suo,Yiwei Xu
The conductivity of Zn-MOF-on-Co-MOF synthesized by one-pot method is improved by searching for the optimum carbonization temperature, which overcomes the limitation of traditional MOF. In order to further enhance electron transfer, the mesoporous PtPdCo trimetal was introduced, which provided considerable load capacity for methylene blue (MB) and reverse complementary DNA (sDNA), and also showed excellent catalytic activity for MB. In this study,the conductivity of aptasensor was improved by modifying carbonized MOF as the base material. In the presence of fipronil (FIP), Apt tended to bind to FIP and was separated from the electrode surface, so that the remaining single-stranded complementary DNA (cDNA) were hybridized with signal probe (MB@PtPdCo/sDNA) and amplified the electrochemical signal. By modifying the substrate, competitive amplification strategy and signal probe material to catalyze signal molecules, the sensor performs multiple signal amplification, and the electrical signal is significantly improved. The sensor has a wide detection range 100 pg/mL to 100 μg/mL and a low detection limit of 76 pg/mL.
研究领域:
分析化学
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环境科学
·
食品安全检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2024
·
IF 3.7
Zijin Chen,Shujie Yuan,Xiaoxue Xu
The combustion of rigid polyurethane foam (RPUF) generates significant amounts of toxic and high-temperature smoke, which restricts its application. Here, an amino-modified Co-MOF (NH2–Co-MOF) was synthesized and it was used in conjunction with ammonium polyphosphate (APP) to decrease the flammability of RPUF. We obtained the expected results: the fire safety of RPUF was greatly enhanced by the addition of NH2–Co-MOF and APP. Compared to neat RPUF, the peak heat release rate (pHRR) and total heat release (THR) values of N–C/A/RPUF decreased by 22.5 and 37.4%, respectively. Based on the analysis of combustion products of the gaseous and condensed phases, it can be seen that the synergistic use of NH2–Co-MOF with APP enhances the barrier effect, dilutes combustible gases, and quenches the combustion chain reaction.
研究领域:
材料科学
·
燃烧学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Guoying Yang,Yijin Song,Songde Han,Zhen-Zhen Xue,De-Xuan Liu,Ani Wang,Guoming Wang
Assembling a heterostructure is an effective strategy for enhancing the electrocatalytic activity of hybrid materials. Herein, CoFe-layered double hydroxide and Co-metal–organic framework (CoFe-LDH/Co-MOF) hollow heterostructure nanorod arrays are synthesized. First, [Co(DIPL)(H3BTC)(H2O)2]n [named as Co-MOF, DIPL = 2,6-di(pyrid-4-yl)-4-phenylpyridine, H3BTC = 1,3,5-benzenetricarboxylic acid] crystalline materials with a uniform hollow structure were prepared on the nickel foam. The CoFe-LDH/Co-MOF composite perfectly inherits the original hollow nanorod array morphology after the subsequent electrodeposition process. Optimized CoFe-LDH/Co-MOF hollow heterostructure nanorod arrays display excellent performance in oxygen evolution reaction (OER) with ultralow overpotentials of 215 mV to deliver current densities of 10 mA cm–2 and maintain the electrocatalytic activity for a duration as long as 220 h, ranking it one of the non-noble metal-based electrocatalysts for OER. Density functional theory calculations validate the reduction in free energy for the rate-determining step by the synergistic effect of Co-MOF and CoFe-LDH, with the increased charge density and noticeable electron transfer at the Co–O site, which highlights the capability of Co-MOF to finely adjust the electronic structure and facilitate the creation of active sites. This work establishes an experimental and theoretical basis for promoting efficient water splitting through the design of heterostructures in catalysts.
研究领域:
材料科学
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电化学
·
催化
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ying Fang,Qianwen Liu,Yang Song,Feiyue Jia,Ying Yang,Haipu Li
Dissolved organic matter (DOM) extensively exists in high-arsenic groundwater with relatively high concentration, which could not only compete with arsenic for adsorption sites, but also depress As(III) oxidation in persulfate-based advanced processes (PS-AOPs) through scavenging free radicals (SO 4 • − and •OH). In order to effectively avoid the negative effect of DOM , an Fe/Co bimetallic metal–organic framework (Fe/Co MOF)-coupled peroxymonosulfate (Fe/Co MOF-PMS) system was rationally constructed for non-radical-dominated As(III) oxidation and chemisorption-driven As(V) adsorption. Results showed that the Fe/Co MOF-PMS system did realize anti-interference As(III) immobilization in DOM-rich high-arsenic groundwater, which was evidenced by no difference in As(III) immobilization efficiencies in the absence and presence of 20 mg/L humic acid (HA). During the oxidation process, 1 O 2 dominated As(III) oxidation while O 2 • − dominated HA oxidation, and the presence of HA significantly promoted the generation of 1 O 2 besides SO 4 • − and •OH. During the adsorption process, chemical adsorption mainly drove As(V) adsorption such as forming M-O-As (M = Fe, Co) bond, while physical adsorption forces played a major role in HA adsorption, such as π-π interaction, hydrogen bonding, and electrostatic attraction. The synergism of oxidation and adsorption processes made the anti-interference As(III) immobilization in DOM-rich high-arsenic groundwater in Fe/Co MOF-PMS system come true. This work is believed to shed light on the highly efficient purification of DOM-rich high-arsenic groundwater.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Yuheng Lu,Chenghui Li,Yunfei Tian,Jing Hu,Xiandeng Hou
The determination of trace tellurium in real samples with complicated matrix can be rather challenging due to the low abundance and interferences. Herein, we report a new method for the highly sensitive detection of Te(IV) by photochemical vapor generation-atomic fluorescence spectrometry (PVG-AFS), utilizing Co-MOF-74 as an adsorbent and a precursor of Co 2+ ion sensitizer for preconcentration and enhanced PVG efficiency. The synthesized Co-MOF-74 can completely adsorb Te(IV) within 10 min in a wide pH range. Following filtration and re-suspension in a dilute solution of formic and acetic acid, the adsorbed Te(IV) was converted to volatile compounds under the UV irradiation and swept to AFS for detection. A limit of detection of 0.08 ng/mL for Te(IV) was obtained after a 50-fold preconcentration. The proposed method was used for analysis of various natural water samples for trace Te(IV), with satisfactory spike recoveries achieved.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Hybrids and Composites
·
2022
·
IF 0
Yue Zhang,Tao Li,Shi Yu Tang,Xin Yue Xie,Ru Zeng Liang,Xiao Xiao Chu
Increasing demands of microwave absorbents require new approaches to enhance the absorbing performance. Metal−organic frameworks (MOFs) could be developed as effective absorbers owing to their outstanding features including intrinsic porosity and high specific area. Herein, novel nanostructured Co-MOF-74 composites have been successfully fabricated via a simple solvothermal method. Excellent absorption performance was achieved for the composite with a minimum reflection loss (RL) of −25.5 dB at 2.5 mm and a broad absorption bandwidth (RL < −10 dB) of 6.7 GHz. Such absorber could be developed as lightweight and high-efficiency absorbing materials, and this work provides inspiration for the design of advanced absorbers with strong dissipation capacity and broad effective bandwidth.
研究领域:
材料科学
·
电磁工程
·
纳米技术
✓ 已验证
DOI
DYES AND PIGMENTS
·
2021
·
IF 4.889
Wenbo Bai,Guoxu Qin,Jing Wang,Lei Li,Yonghong Ni
It has drawn extensive research interest to integrate luminescent ligands into metal-organic frameworks as luminescent materials due to striking luminescent properties. In this work, a Co-MOF with weak fluorescence emission , [Co(OBA)(2,2′-BPY)], was synthesized by a mixed solvothermal route with Co(NO 3 ) 2 as the Co 2+ ion source, 4,4′-Oxybis(benzoic acid) (OBA) and 2,2′-Bipyridyl (2,2′-BPY) as the ligands. Its fluorescence was obviously enhanced through integrating a small amount of luminescent ligands: 2-aminoterephthalic acid. Interestingly, the above enhanced fluorescence could be selectively quenched by the organophosphorus pesticides with p-nitrophenyl group such as p-nitrophenyl phosphate (PNPP) and bis(p-nitrophenyl) phosphate (BNPP) in water systems. As a case, the detection limit towards PNPP was up to 352 nM (0.07 mg kg −1 ), which is far lower than the standards for similar pesticide residues in fruits in China (0.1–0.6 mg kg −1 ) [ 1 ]. At the same time, the above phenomenon of the fluorescence quenching was not interfered from some other pesticides, metallic ions, amino acids and aromatic nitrocompounds, implying the present fluorescent material has potential application as a highly selective probe for detecting PNPP pesticide residues in food and domestic water. Furthermore, a possible quenching mechanism was discussed.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 4
·1-8
·
IF 5.833
Wan Huimin,Wang Yufei,Chen Juan,Meng Hong-Min,Li Zhaohui
A two-dimensional (2D) Co-MOF nanosheet-based nanozyme was developed for colorimetric detection of disease-related biomolecules. The prepared 2D Co-MOFs exhibited ultrahigh peroxidase catalytic activity. 2D Co-MOFs can catalyze the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to the blue product oxTMB, accompanying an obvious change of absorption value at 652 nm. However, alkaline phosphatase can catalyze the hydrolysis of L-ascorbic acid-2-phosphate to produce ascorbic acid which can reduce the oxTMB to TMB, resulting in an obvious color fading. Therefore, by recording the change of absorption value at 652 nm, the 2D Co-MOF nanosheets were used to detect ascorbic acid (AA) and alkaline phosphatase (ALP). The limit of detection for AA and ALP was 0.47 μM and 0.33 U L −1 , respectively. The limit of quantification for AA and ALP was 1.56 μM and 1.1 U L −1 , respectively. The developed nanozyme was successfully used to determine alkaline phosphatase in clinical human serum samples and the results were consistent with those provided by the hospital. Furthermore, by integrating 2D Co-MOF nanosheets with image recognition and data processing function fixed on a smartphone, a portable test of ascorbic acid was reached. Graphical abstract
Schematic presentation of the preparation of two-dimensional Co-MOF nanosheet-based nanozyme and their application in portable detection of biomolecules
研究领域:
生物化学
·
医学诊断
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Cui Li,Zhaotian Ba,Bingchen Wu,Xinxin Shi,Hui Liu,Lili Ma,Xin Wen,Pingan Song
The design of environmentally friendly flame retardants to achieve the balanced flame retardancy and mechanical properties of poly(L-lactic acid) (PLA) is a critical challenge. Herein, inspired by the micropapillae adorned with hydrophobic wax crystals structure of lotus leaf, Mg(OH) 2 /Co-MOF/DOPO hybrids (MH@MOF- g -DOPO) were successfully constructed through in-situ growth of Co-MOF and chemical grafting of DOPO. Thermogravimetric analysis (TGA) revealed that the Co-MOF content in MH@MOF was approximately 27.3 wt%, while the grafted DOPO in MH@MOF- g -DOPO was about 19.5 wt%. Owing to the unique microstructure, the water contact angle of MH@MOF- g -DOPO reached to 113.7°, implying its hydrophobic surface. Subsequently, the as-synthesized MH@MOF- g -DOPO was used to prepare PLA composites, which exhibited significantly improved flame retardancy, as indicated by the LOI value of 30.2 %, UL-94 V0 rating, and the reduction on PHRR by 70.1 %. The flame retardant mechanism was attributed to the synergistic effects of multiple flame retardant units (MH, Co-MOF and P) in MH@MOF- g -DOPO hybrids. Furthermore, the flame retarded PLA/20MH@MOF- g -DOPO achieved the brittle-tough transformation via uniaxial pre-stretch process, thus displayed outstanding mechanical properties (good stiffness and excellent toughness). Notably, compared to the pristine undraw PLA, the Youngꞌs modulus, tensile strength and the elongation at break PLA/20MH@MOF- g -DOPO increased by 35 %, 38 % and 1957 %, respectively. This work proposes an innovative and efficient method to achieve the excellent balance on flame retardancy and mechanical properties of PLA composites, benefiting to promoting their real-world applications as functional polymer materials.
研究领域:
材料科学
·
生物学启发设计
·
高分子化学
✓ 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）