CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·
IF 1.193
Jin-Ling PU,Pei-Hong TONG,Yong-Juan MENG,Jian-Ping LI
A bilayer-structured ZIF-8 composite with dual functions of sensing and recognition was synthesized, with ZIF-8 serving as an electrochemiluminescence (ECL) probe carrier and molecularly imprinted membrane to construct a molecularly imprinted electrochemiluminescence sensor. The inner layer was a ZIF-8 layer loaded with a luminescent probe, which was obtained by the reaction of zinc ions with 2-methylimidazole on the magnetic Au@CoFe 2 O 4 surface in the presence of Ru(bpy) 3 2+ , the composite magnetic particle is marked as ZIF(Ru)/Au@CoFe 2 O 4 . The outer layer was a layer with recognition function using ZIF-8 as an imprinted membrane, which was obtained by a layer-by-layer self-assembly method on the surface of ZIF(Ru)/Au@CoFe 2 O 4 with dopamine (DA) as a template molecule, which was marked as ZIF(MIP)/ZIF(Ru)/Au@CoFe 2 O 4 . After eluting the template molecules, the composite particle was immobilized on the surface of a magnetically controlled glassy carbon electrode (MGCE) to obtain a molecular imprinting (MIP) modified electrode. When dopamine molecules were re-adsorbed by the MIP, a charge/energy transfer between dopamine and Ru(bpy) 3 2+ occurred. It subsequently led to the quenching of electrochemiluminescence, which was used as the basis for the detection of dopamine by a molecularly imprinted electrochemiluminescence sensor. When the dopamine concentration was in the range of 1.0 × 10 −14 –5.0 × 10 −10 mol/L, the ECL intensity change of the sensor and the dopamine concentration had a good linear relationship, and the detection limit was 4.8 × 10 −15 mol/L. The molecularly imprinted electrochemiluminescence sensor was successfully applied to the detection of dopamine in human serum samples.
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高影响因子
TALANTA
·
2018
·
IF 4.244
Yue Wang,Xue Li,Geoffrey I.N. Waterhouse,Yunlei Zhou,Huanshun Yin,Shiyun Ai
In this work, a novel and sensitive photoelectrochemical (PEC) strategy was designed for protein kinase A (PKA) detection, comprising carbon microsphere (CMS) modified ITO electrode, TiO 2 as the phosphate group recognition material and graphite-carbon nitride (g-C 3 N 4 ) as photoactive material. For the first time, gold nanoparticle decorated zeolitic imidazolate frameworks (Au-ZIF-8) was employed to fabricate biosensor for PKA activity assay with the function of substrate peptide immobilization and signal amplification. Firstly, substrate peptides were assembled on the Au-ZIF-8/CMS/ITO surface through the covalent bonding between the gold nanoparticles (AuNPs) and sulfydryl groups of the peptides. Then, in the presence of ATP , phosphorylation of the substrate peptide was achieved under PKA catalysis. Finally, TiO 2 -g-C 3 N 4 composites were further modified on the electrode surface based on bonding between TiO 2 and phosphate groups created via phosphorylation of the peptide (yielding TiO 2 -g-C 3 N 4 /P-peptide/Au-ZIF-8/CMS/ITO), which is different with our previous work by directly immobilizing g-C 3 N 4 composite on electrode surface. The developed method showed a wide linear range from 0.05–50 U mL −1 . The detection limit was 0.02 U mL −1 (S/N = 3). The constructed biosensor exhibited high detection specificity for PKA. In addition, the wide applicability of this biosensor was demonstrated by evaluating the inhibition ability of ellagic acid towards PKA.
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PubMed
高影响因子
CARBON
·
2018
·
IF 7.082
Zhiwei Li,Hongyu Mi,Lang Liu,Zhengyu Bai,Jinping Zhang,Qing Zhang,Jieshan Qiu
Core-shell hybrid precursors (ZIF-8/ PP -SiO 2 ) engineered by zeoliticimidazolate framework (ZIF-8) depositing on the polyelectrolyte-decorated silica ( PP -SiO 2 ) are successfully transformed into unusual N-rich hollow carbon shell frameworks (NHCSFs) with adjustable physicochemical properties by the layer-by-layer assembly, interface engineering and subsequent carbonization , which is the first example that systematically elucidates the formation and structure-property correlation of unique three-dimensional (3D) carbon frameworks. The optimal NHCSF-3 displays superior performance with high capacitance approaching 253.6 F g −1 at 1 A g −1 , excellent rate capability delivering 79% capacitance retention after a 50-fold increase of the rate, and long lifetime (92.1% retention for 20000 cycles). The studies on alkaline and neutral NHCSF-3//NHCSF-3 supercapacitors demonstrate that the latter with high voltage up to 1.6 V using a Na 2 SO 4 electrolyte can deliver high energy density of 13.3 Wh kg −1 . The distinctly enhanced performance illustrates that, except for the factors such as morphology, surface area, pore volume , and N-doping level, hierarchical porosity also significantly boosts electrochemical properties of the materials because of providing efficient charge/mass transport. Overall, this research provides an efficient platform for precisely modulating the structure of MOF-based carbons to develop multifunctional hollow architectures for satisfying enormous demands in upcoming energy devices.
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EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2019
·Vol. 2019
·期 22
·2761-2767
·
IF 2.578
Hongchen Yang,Shengbo Zhang,Mei Li,Xiao Liu,Jinyu Han,Xinli Zhu,Qingfeng Ge,Hua Wang
Graphical Hollow N-doped carbon nanocages incorporating Au and ZnO nanoparticles derived from ZIF-8 were synthesized. Au 0.40 -ZnO/CN incorporates Au and ZnO nanoparticles. Under visible light irradiation, Au 0.40 -ZnO/CN exhibits a significantly enhanced H 2 production rate from formaldehyde alkaline solution, which is 12 times and 2.6 times of those of ZnO/CN and Au/CN, respectively. Hollow carbon nanostructured materials incorporating metals or metal oxides have attracted considerable interest in photocatalysis. Herein, novel hollow N-doped carbon nanocages incorporating Au and ZnO nanoparticles derived from ZIF-8 were successfully synthesized. Firstly, ZIF-8 nanocrystals were treated with chloroauric acid solution (HAuCl 4 ) to produce hollow Au X @ZIF-8 cubes through acid etching of cores and cation exchange. Then, the Au X @ZIF-8 cubes were used as precursors to obtain Au X -ZnO/CN after pyrolysis in a N 2 atmosphere. The resulting Au 0.40 -ZnO/CN had a uniform hollow structure with ≈ 30 nm shells conformal to ZIF-8 dimension while incorporating ≈ 5 nm nanoparticles of Au and ZnO and exhibited remarkable photocatalytic activity and excellent recyclability for hydrogen production from formaldehyde (HCHO) alkaline solution under visible light irradiation. The results demonstrated that incorporation of Au greatly improves the visible light absorption and charge separation via SPR effect. Furthermore, the ZIF-8-derived hollow N-doped carbon cages can expose more uniformly disperse active sites with conductive support. The methodology used here provides a novel approach for preparing hollow hybrid carbon materials with visible-light-driven photocatalytic applications.
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 32
·9856-9864
·
IF 6.641
Di Yin,Ming-Liang Wang,Ying-Zi Wang,Xun Hu,Bo Liu,Hong Liu,Lulu Ma,Guang-Gang Gao
A ternary nanocomposite containing ZnO, ZnS and MoS2 (ZnMoNCs) has been firstly synthesized by Keggin-type polyoxomolybdate and ZIF-8 as starting materials to provide Mo and Zn sources simultaneously. As compared to the mono- or bi-component complex, ZnMoNCs present more sensitive and stable surface-enhanced Raman scattering (SERS) activity. When rhodamine 6G is used as a probing molecule, the detection limit of 10−9 mol L−1 can be achieved on the ZnMoNC substrate with the enhancement factor (EF) of 1.4 × 108, which is the highest sensitivity among the known semiconductor SERS substrates. The increased adsorption sites and the synergistically improved charge transfer are conducive to the large enhancement of the SERS activity. It was also proved that the ZnMoNC substrate possesses high stability and self-cleaning properties, and can be reused in SERS detection without losing its activity even after 5 cycles. This work paves a new way to the design of new semiconductor SERS substrates by the utility of a multicomponent complex.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Jing Liu,Yan Ping Chen,Penglin He,Ziyu Ding,Yun Guo,Songhe Cui,Chao Ma,Zhiping Xie,Sun Xia,Yin Zhang,Ye Liu,Yuan Liu
Hexanal is considered as an important volatile compound indicator for the assessment of freshness and maturity of foods. Therefore, sensitive and stable monitoring of hexanal is highly desired. Herein, an efficient receptor immobilization strategy based on ZIF-8@ Single-walled carbon nanotube (SWCNT) and nanosomes-AuNPs/Prussian blue (PB) was proposed for the development of olfactory biosensors. ZIF-8@SWCNT as dual support materials provided a high density of active sites for nanosomes loading. Moreover, the co-electrodeposition of nanosomes-AuNPs and PB on the sensor interface effectively amplified the electrochemical signal and maintained the activity of the receptor. The combination of ZIF-8@SWCNT with AuNPs/PB imparts excellent sensing performance of the biosensor with a wide detection range of 10 −16 –10 −9 M, a low detection limit of 10 −16 M for hexanal, and a long storage stability of 15 days. These results indicate that our biosensor can be a powerful tool for versatile applications in food and other related industries.
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高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 11
·6623-6633
·
IF 10.7
Guangxu Bao,Yaxin Jin,Qun Fan,Xiaoyi Chen,Xiao Wang,Tianxiang Yan,Haoyuan Chi,Jianlong Lin,Wenquan Cui,Sheng Zhang
Developing stable and porous oxygen reduction catalysts is crucial for advancing clean energy technologies. Zeolite imidazole frameworks (ZIFs) present versatile avenues for synthesizing non-noble metal ORR catalysts due to their unique morphology. While previous research has predominantly focused on augmenting catalytic properties through increased metal loading on ZIFs, herein we explore the engineering of ZIF-derived catalyst morphologies to enhance active site utilization and facilitate mass transport, presenting a promising avenue for performance improvement. We present a facile synthesis method for hollow carbon nano-frameworks (HCNFs) loaded with FeCu alloy nanoparticles, leveraging tannic acid assistance. The resulting FeCu-HCNFs exhibit a hierarchical pore structure, numerous defect sites, and enriched active sites on the shell, showcasing exceptional ORR activity. Specifically, the FeCu-HCNFs demonstrate a 25 mV higher half-wave potential compared to widely used noble Pt/C in alkaline systems and outstanding zinc–air battery performance. Density functional theory (DFT) results underscore the catalytic enhancement, revealing that introducing Cu increases the charge density at the central sites of Fe and reduces the adsorption energy for O2* and OH*. This morphological engineering strategy establishes FeCu-HCNFs as an effective Pt-free catalyst for the ORR, emphasizing its practical potential in advancing fuel cell technologies.
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高影响因子
Analytical Methods
·
2024
·
IF 2.7
Zhiren Zhou,Yuting Tian,Lina Zou,Yanan Liu,Xueqing Zhang,Xiaojing Huang,Huanyu Ren,Zheng Li,Huiru Niu,Hao Liao,Xiaojing Zhang,Hongzhi Pan,Shengzhong Rong,Hongkun Ma
Nuclear matrix protein 22 (NMP22) is one of the most important tumor markers of bladder cancer and is significantly elevated in the urine of bladder cancer patients. Therefore, in this work, a highly sensitive ratiometric electrochemical immunosensor was constructed to detect NMP22 based on ZIF-8@MWCNTs@Chit@Fc@AuNPs composites. ZIF-8 had a large surface area and good adsorption ability. Multi-Walled Carbon Nanotubes (MWCNTs) can optimize the electrical conductivity of ZIF-8, so that the electrode surface of ferrocene (Fc) obtains a stable and strong electrochemical signal. In addition, AuPt-MB provided another strong detection signal methylene blue (MB) while immobilizing the secondary antibody (Ab2) through Au–N and Pt–N bonds. A ratiometric electrochemical sensor was formed based on ZIF-8@MWCNTs@Chit@Fc@AuNPs and AuPt-MB, which showed a great linear connection between IMB/IFc and the logarithmic concentration of NMP22 with a detection limit of 3.33 fg mL−1 (S/N = 3) under optimized specifications in the concentration interval of 0.01 pg mL−1 to 1000 ng mL−1. In addition, the ratiometric immunosensor showed good selectivity and stability.
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Food Bioscience
·
2025
·
IF 5.9
Tao Lu,Zhiguang Suo,Min Wei,Huali Jin,Yong Liu,Baoshan He,Renyong Zhao
β-lactoglobulin (β-LG) is a major allergen in milk what can provoke intense allergic reactions. Therefore, an accurate and efficient method is required for sensitive detection of β-LG. A label-free electrochemical aptasensor utilizing Au/Ag@ZIF-8 and dual amplification strategy has been designed for the detection of β-LG. Au/Ag@ZIF-8 nanocomposite is used as the electrode modification material, which has abundant relative surface area and exceptional conductivity behavior, and it can also serve to immobilize DNA strands. By combining RecJf exonuclease and hybridization chain reaction (HCR) dual amplification strategy, an apparent enhancement of electrochemical signal is obtained. β-LG undergoes target cycling in the effect of RecJf exonuclease, which dislodges complementary strand cDNA and further triggers HCR to provide a large number of sites for methylene blue embedding. The detection range of this aptasensor is 0.01–1000 ng/mL in the optimal detection conditions, with a limit of detection (LOD) of 5.37 pg/mL. The constructed electrochemical aptasensor possesses the superiorities of good specificity, preeminent accuracy and satisfied stability in the detection of β-LG. Moreover, it also demonstrates satisfactory detection performance in the detection of real samples, which indicates that the electrochemical aptasensor has a broad application prospect in protecting food safety and health.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yu Shu,Longfei Qiao,Jialong Geng,Cong Li,Bang Chen,Qidong Wang,Hiroshi Uyama,Yehua Shen
In this work, hierarchically ZIF-8@Cellulose acetate composite monolithic carbon (ZCMC) was fabricated for the first time by combining a template-free thermally induced phase separation (TIPS) method with in-situ ZIF-8 crystals doping followed by KOH activation. By altering ZIF-8 content and activation temperature, a series of ZCMC samples were prepared in order to analyze the effect of pore structure and surface chemical characteristics on CO 2 adsorption. The optimal sample of 20-ZCMC-800 exhibited the largest CO 2 uptake of 7.30 (0 °C) and 4.26 mmol/g (25 °C) at 1 bar, which was competitive with the majority of the reported porous carbons. Additionally, the CO 2 adsorption capacity after 10 cycles still remained at 96 % of its initial value and the ideal adsorption solution theory (IAST) CO 2 /N 2 selectivity was 21.31 at 25 °C, indicating excellent recyclability and good selectivity. Furthermore, it was found that the CO 2 adsorption capacity was considered to be linear relationship with micropore but independent on BET specific surface area. The contributions of N-containing functional groups and ZnO crystals created from ZIF-8 pyrolysis at high temperature for CO 2 adsorption were thoroughly discussed under density functional theory (DFT) and grand canonical Monte Carlo (GCMC). The results showed that pyrrole-N group contributed significantly to CO 2 adsorption by hydrogen bonding and Lewis acid-base interactions, while the ZnO crystals displayed the strong interaction with CO 2 by the chemisorption process. The CO 2 adsorption performance of ZCMC was mostly determined by the joint effect of micropore structure and surface chemical compositions. The thermodynamic parameters of Q st ranged from 23.03 to 33.23 kJ/mol, revealing the CO 2 adsorption still belonged to the scope of physisorption process. More importantly, the novel and feasible strategy presented herein is expected to provide an innovative approach for the design and discovery of ZIFs-based composite carbon materials for efficiently CO 2 adsorption.
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TALANTA
·
2025
·
IF 6.1
Pengyue Song,Doudou Lei,Lingling Li,Nan Long,Qingbin Xu,Ying Li,Lidong Zhou,Ruile Pan,Weijun Kong
Regarding the high incidence of residue and serious toxicity of acetochlor (ATC) pesticide, it is urgent to explore simple and low-cost methods for their sensitive detection in food. In this study, with zeolite-like imidazole frameworks (ZIFs) as the carriers for embedding glutathione-modified luminescent gold nanoclusters (GSH-AuNCs) exhibiting aggregation-induced emission (AIE) effect, a GSH-AuNCs@ZIF-8 probe driven strip-based lateral flow immunosensor (LFIS) was developed for visual qualitative and fluorescent quantitative dual-modal detection of ATC. The encapsulation of GSH-AuNCs into ZIF-8 with restriction effect not only significantly improved the stability and anti-interference ability of AuNCs, but also remarkably enhanced the fluorescence efficiency for signal amplification due to the enhanced AIE effect of GSH-AuNCs, endowing the LFIS platform with unique performance. Under optimal conditions, the LFIS platform could realize the point-of-care visualization and quantitation of ATC within 20 min with a detection limit of 8.3 pg/mL and a broad linear range of 0.01–10.0 ng/mL. High recoveries of 96.44%–106.8 % in the spiked ginger samples confirmed the outstanding accuracy and dependability of the new platform for ATC analysis of real samples. Compared with other immunoassays, the AuNCs@ZIF-8-based dual-modal LFIS exhibited the advantages of simple preparation, simple operation, short analytical time, and low cost, which could be expanded to monitor more pesticides and more trace contaminants in diverse food and agricultural products, and medicinal material matrices.
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高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Doudou Lei,Lingling Li,Pengyue Song,QingBin Xu,Lihua Huang,Xiao Ma,Lidong Zhou,Weijun Kong
Glyphosate (Gly) is a widely-used herbicide in food production, while, the residue of which due to the long-term and excessive overspray poses serious threats to public health. The development of reliable methods for its sensitive detection is of great urgency. In this study, a novel ratiometric fluorescent nanosensor by encapsulating N-doped carbon dots (N-CDs) and gold nanoclusters (AuNCs) in zeolitic imidazole framework-8 (ZIF-8) as the dual-emissive fluorescence probes at 410 and 650 nm, respectively, was constructed for Gly detection. Due to the adsorption property of ZIF-8, the N-CDs/AuNCs@ZIF-8 nanoprobes accumulated Cu 2+ to quench the red fluorescence of AuNCs, and the blue fluorescence of N-CDs was stable. While thiocholine, a product of acetylthiocholine, hydrolyzed by acetylcholinesterase could coordinate with Cu 2+ , resulting in significant fluorescence recovery of AuNCs. This phenomenon was utilized for the quantitation of Gly, due to its inhibitory effect on acetylcholinesterase activity. By calculating the fluorescence intensity ratio ( I 650 /I 410 ), Gly in real sample could be accurately determined in a concentration range of 2–100 ng/mL with a limit of detection of 1.92 ng/mL because of the anti-interference and the self-correction ability of the two fluorescence signals. The N-CDs/AuNCs@ZIF-8 nanoprobes-assisted ratiometric fluorescent nanosensor exhibited unique merits of rapid construction, simple operation, high specificity, and good accuracy for Gly in edible and medicinal malt samples with recoveries of 93.7–108.2 %. This study presents a multiple tool for the versatile sensing of trace pesticides in more food matrices, which can be extended to a full range of environmental and food safety applications.
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高影响因子
危险品化学品经营许可证（带存储）