NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 7
·3361-3367
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IF 3.3
Shiqi Cheng,Jin Yang,Shangying Qin,Li Huang,Yuanjin Xu,Yilin Wang
Three-dimensional reduced graphene oxide (3DrGO) and a flower-like zinc oxide (ZnO) crystal were prepared using a hydrothermal method. A stable dispersion of the 3DrGO–ZnO composite was formed by sonication mixing, and was further applied to modify a glassy carbon electrode for direct trace detection of ascorbic acid (AA), dopamine (DA) and uric acid (UA). The structure, composition and morphology of the as-prepared 3DrGO–ZnO composite were characterized using X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy, respectively. Compared with bare, 3DrGO and ZnO electrodes, the 3DrGO–ZnO electrode exhibited an obvious electrocatalytic enhancement effect. Furthermore, the 3DrGO–ZnO electrode could well distinguish and enhance the differential pulse voltammetry signals of AA, DA and UA. Under the selected conditions, the peak current responses to AA, DA and UA were linear in the range of 100–2500 μmol L−1, 2.00–35.0 μmol L−1, and 1.00–150 μmol L−1, respectively. To verify its possible application, the constructed modified electrode was successfully used for the analysis of real samples with satisfactory results.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2022
·
IF 4.52
Meng Dong,Ran Xin,Zhi-Yuan Li,Yu-Lian Li,Xu-Hui Huang,Xiu-Ping Dong,Bei-Wei Zhu,Lei Qin
The organic acids in fruits have critical impacts on palatability and flavor . In this paper, we established a method to quantify 21 essential organic acids in animal and plant matrices using HPLC mass spectrometry with high sensitivity and broad applicability. The organic acids in 12 animal and plant matrices were quantified. Additionally, the profile and concentration of organic acids could achieve the classification of samples. The fruit quality traits and important organic acids content during the storage of cherry tomatoes were monitored via our method. Nine organic acids changed significantly in 16 days of storage, especially citric acid , as the most predominant organic acid, decreased from 4260 to 2290 μg/g, leading to a decline in sourness of 46.2 %. In contrast, after 16 days of storage, galacturonic, gluconic, malonic and quinic acids increased by 155 %, 88 %, 162 %, and 112 %, respectively, which had a potential effect on softening and deteriorating of cherry tomatoes.
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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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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chunhui Wang,Xiutao Yang,Guopeng Zhu,Tianye Wang,Dengbin Yu,Yongzheng Lu,Hongwen Yu
In this work, copper-platinum nanoparticles (Cu-Pt NPs) were successfully modified on a glassy carbon electrode (GCE) by a facile electrodeposition process for non-enzymatic glucose detection. The composition and morphology of Cu-Pt NPs were characterized by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The electrochemical properties were evaluated through cyclic voltammetry , electrochemical impedance spectroscopy and amperometric methods . The as-obtained Cu-Pt NPs/GCE displayed a high sensitivity of 2209 µA mM −1 cm −2 toward glucose detection in a linear range of 10–750 µM with a low limit of detection (LOD) of 1.8 µM (S/N = 3). Overall, Cu-Pt NPs/GCE was advantageous in terms of selectivity , reproducibility, long-term stability and rapid response time. The detection of glucose by Cu-Pt NPs/GCE was able to be renewed to satisfactory levels through an unsophisticated reduction processing program. Additionally, Cu-Pt NPs/GCE was able of detecting glucose in artificial saliva and human serum samples. In sum, these findings look promising for future.
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Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 7
·1523-1532
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IF 7
Zhong-Xia Wang,Lei Hu,Xiao-Qiong Li,Yi-Lei Jia,Ting Wang,Wei Wang
Exploring the ultrahigh quantum efficiency of a carbon-based probe via a green and simple technique, and utilisation of its sensing ability for highly bioactive molecule detection is still highly challenging. Herein, we prepared a novel boron-enriched rice-like homologous carbon nanoclusters (BRCNs) with an ultrahigh quantum efficiency of ∼51.5% by introduction of a conjugated structure attached to the CN bond and an electron-withdrawing boron active centre. Unexpectedly, the BRCNs obtained showed a stable dispersion of rice-like carbon nanograins, composed of small carbon dot assembled nanoclusters with an average diameter size of ∼30 nm, and containing boron units of ∼24.68 at%. What's exciting is that the BRCNs obtained exhibited an “on–off–on” three-state emission with the addition of an hydroxyl radical (OH˙) and its antioxidants. Thus, two distinctive fluorescent responses for OH˙ and antioxidants based on the BRCN probe had been developed, and the mechanism has been determined using TEM, XPS, FT-IR, FL, UV-vis spectrophotometry, UPS and fluorescent lifetimes. The OH˙, generated from the Fenton's reagent, preferentially attack the electron-deficient vacancy p orbit of the boron atom in the surface of the BRCNs, which results in the boron atom being easily substituted/attacked by OH˙, and leading to spontaneous aggregation induced quenching (AIQ) due to the existence of a strong intermolecular hydrogen bond between denatured BRCNs. Furthermore, the proposed method was also successfully applied to monitor endogenous OH˙ generation in HeLa cells by confocal imaging, which could be used for elucidating OH˙-induced oxidative damage to biological tissues and proteins.
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PubMed
高影响因子
TALANTA
·
2022
·
IF 6.556
Chiyu Ma,Liubing Kong,Xianyou Sun,Yanchi Zhang,Xinyi Wang,Xinwei Wei,Hao Wan,Ping Wang
Uric acid (UA) is the final product of purine metabolism. A high concentration of UA in body fluid may lead to kidney stones, gout, and some cardiovascular diseases. Therefore, the non-invasive daily monitoring of UA is of great significance for both hyperuricemia patients and fit people. However, most of the current detection methods for UA are enzyme-dependent which limits the application scenarios and lacks portable instruments for on-site detection, including optics and electrochemistry . In this work, an enzyme-free and wide-range colorimetric sensor for UA and H 2 O 2 detection was developed based on a mercaptosuccinic acid (MSA)-modified Cu nanoparticles (CuNPs). Under the action of UA or H 2 O 2 , with the cleavage of MSAs on the CuNPs surface, small Cu particles are further aggregated into larger particles with a lightning violet color. With the employment of the multi-channel handheld automatic photometer (MHAP), the concentration of UA and H 2 O 2 can be determined on-site according to the absorbance measurement by the photodiodes. The linear range of UA was 5 μM-4.5 mM with the limit of detection (LOD) of 3.7 μM, while the linear range of H 2 O 2 was 5 mM–500 mM and 5 μM-5 mM with the LOD of 4.3 μM. This approach has been applied to the detection of UA in human urine, providing more possibilities for non-invasive home health monitoring, community medical diagnosis, and broader prospects of on-site disease detection.
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PubMed
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Tianyao Shen,Xiaojing Wang,Jiaqin Li,Chunyan Yang,Peng Xu,Hua Chai,Peng Wang,Guangshan Zhang
Dielectric barrier discharge plasma (DBDP) has attracted much attention because of its energy saving, high efficiency, and simultaneous production of various active substances. In this work, a three-dimensional (3D) ZnFe-layered double hydroxides (LDH)/nickel foam (NiF) was rationally engineered and synthesized to overcome the problem of active substances insufficient use and clogged pipes in DBDP. With the assistance of ZnFe-LDH/NiF, the removal efficiency of diuron (DUR) increased from 85.98 % to 96.52 %, and the energy efficiency increased from 1074 mg·kWh −1 to 1281 mg·kWh −1 . In various circumstances, the DBDP + ZnFe-LDH/NiF process performed a strong anti-interference ability, high stability, and reusability. The improvement of catalytic degradation ability could be attributed to the combined action of the Fenton-like process and O 3 catalysis, all three elements participating in the electron transfer. With the help of quenching experiments, reactive oxygen species (ROS, including OH, 1 O 2 , and O 2 − ) were identified as the dominant active substance, significantly contributing to DUR elimination. Density functional theory calculation (DFT) and quadrupole-time of flight-liquid chromatography/mass spectrometry (Q-TOF-LC/MS) reached the same conclusion that C N and C−Cl were the main sites attacked by electrophiles and radicals. In summary, the combination of DBDP and ZnFe-LDH/NiF sheds new light on catalyst design and DBDP application.
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ChemElectroChem
·
2023
·Vol. 10
·期 6
·e202201129
·
IF 4
Peng Lei,Ying Zhou,Xincheng Sun,Chuan Dong,Yinghe He,Yang Liu,Shaomin Shuang
Graphical Sweet nanospheres : Glucose-derived carbon nanospheres (CNs) synthesized by a simple hydrothermal approach were employed for electrochemical determination of dopamine. The CNs-modified glassy carbon electrode exhibits excellent sensing performance and satisfactory results when applied in human serum samples, making it promising for biomedical applications. The detection of dopamine (DA) has received enormous attention since it is widely recognized as an important neurotransmitter associated with nerve signaling and some diseases. In this work, glucose-derived carbon nanospheres (CNs) are synthesized by the green hydrothermal approach and are served to modify electrodes for the detection of DA. The CNs were successfully synthesized and were investigated in detail by various characterization technologies. The CNs modified glassy carbon electrode (CNs/GCE) exhibits better electrochemical sensing performance with a wide linear range of 0.05–1600 μM and a low limit of 8.3 nM for determination of DA, as compared with the modified electrodes reported previously. The CNs/GCE was successfully applied to detect DA in human serum samples, which makes it promising for a variety of biomedical applications. More importantly, this work shows a novel green and simple strategy for the development of cost-effective and high-performance sensing materials, which provides more opportunities for design of electrochemical sensors with future capabilities of mass production in practical applications.
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COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 301
·期 3
·229-237
·
IF 2.4
Yang Xiaoliang,Huo Chaofei,Ji Yuting,Xu Sheng,Zhang Cuige,Xia Chunmiao,Liu Huan,Zhang Rongli,Jin Ying,Miao Zongcheng
Thermo-responsive lysozyme/calcium alginate- g -poly-N-isopropylacrylamide nanohydrogels (Lys/CA- g -PNIPAAm NHs) were prepared from the self-assembly of Lys and sodium alginate- g -poly-N-isopropylacrylamide (SA-g-PNIPAAm) and the ionic cross-linking of CaCl 2 in aqueous solution. The Lys/CA- g -PNIPAAm NHs were immobilized on the cleaned surface of a transducer to fabricate a Lys molecularly imprinted sensor (Lys@MIP NHs sensor), which can selectively rebind to Lys in a mixture of closely related compounds. The effects of temperature on the size and the morphology of the Lys/CA- g -PNIPAAm NHs, the removal of Lys templates, the rebinding of Lys targets, and the detection performance of the Lys@MIP NHs sensor were investigated by dynamic light scattering, transmission electron microscope, and differential pulse voltammetry measurements. Compared with other Lys sensors, the fabricated Lys@MIP NHs sensor exhibited the wide linear range from 1 × 10 −9 to 1 × 10 −3 mg·mL −1 at 30 °C and showed short analysis times, high accuracy, satisfactory selectivity, stability, repeatability, reproducibility, and practical application for Lys detection in urine sample. Graphical Abstract
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Frontiers in Pharmacology
·
2023
·
IF 5.6
Yang Yang,Cuiting Lin,Qiang Zheng,Leqi Zhang,Yongmei Li,Qinghua Huang,Ting Wu,Zean Zhao,Lu Li,Jian Luo,Yanqing Jiang,Qun Zhang,Xing Wang,Chenglai Xia,Jianxin Pang
Hyperuricemia (HUA) is associated with left ventricular remodeling (LVR) and thereby causes the initiation and development of a large number of cardiovascular diseases. LVR is typically accompanied by cardiomyocyte energy metabolic disorder. The energy supply of cardiomyocytes is provided by glucose and fatty acid (FA) metabolism. Currently, the effect of HUA on cardiomyocytic FA metabolism is unclear. In this study, we demonstrate that UA-induced cardiomyocyte injury is associated with cytoplasmic lipid deposition, which can be ameliorated by the FA metabolism-promoting drug L-carnitine (LC). UA suppresses carnitine palmitoyl transferase 1B (CPT1B), thereby inhibiting FA transport into the mitochondrial inner matrix for elimination. LC intervention can ameliorate HUA-associated left ventricular anterior wall thickening in mice. This study showed that FA transport dysfunction plays is a critical mechanism in both cardiomyocytic injury and HUA-associated LVR and promoting cytoplasmic FA transportation through pharmacological treatment by LC is a valid strategy to attenuate HUA-associated LVR.
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PubMed
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ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Bo Shao,Fang Chen,Jianyuan Wang,Wei Zhai
Sonochemical synthesis is recognized as a promising high-efficiency method for fabricating transition metal oxides (TMOs) based flexible self-supported electrodes as nonenzymatic glucose sensor. However, it is still a challenge to obtain TMOs self-supported electrodes with well-controlled TMOs nanostructure and desirable interfacial properties via a sonochemical approach because of the uncontrollability of transient cavitation. In this study, CuO@polydopamine (PDA) nanoparticles (NPs) are in situ grown onto carbon cloth (CC) to fabricate CuO@PDA/CC self-supported electrode via a sonochemical process. The sonochemically synthesized PDA not only stabilized the transient cavitation intensity, but also regulated the growth of CuO due to the strong chelating ability between Cu 2+ and catechol groups from PDA. It is determined that the mean size of CuO@PDA NPs on the CuO@PDA/CC electrode is less than 100 nm with a narrow size distribution. Attributed to high electrochemical active surface area (4.61 mF cm −2 ) and low interface resistance (2.35 Ω), CuO@PDA/CC electrode displays excellent electrochemical performance as a glucose sensor with high sensitivity of 1.843 μA cm −2 mM −1 in a wide linear range up to 4.985 mM and excellent stability. This work provides a facile approach to fabricating the flexible self-supported electrodes with well-controlled nanostructure and desirable interfacial properties for high-performance electrochemical sensors via regulating the transient cavitation intensity in the sonochemical process.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Aijuan Xie,Haoye Wang,Jiaqi Lin,Jie Pan,Menglu Li,Jiaojie Wang,Shixin Jiang,Shiping Luo
In the current study, bimetallic-organic gel (ZrFe-MOGs) were rapidly prepared without using any toxic or harmful organic solvent , and new bimetallic oxide ZrFeO x were prepared by roasting ZrFe-MOGs directly. Then ZrFeO x nanoparticles were combined with 3D RGO/MWCNTs by a solvothermal method to synthesize 3D RGO/MWCNTs@ZrFeO x hybrid. Due to its three-dimensional structure, large electroactive surface area and more active sites, and excellent conductivity, the electrocatalytic activity of the modified electrode for the oxidation of dopamine (DA) and paracetamol (PAT) was effectively improved, and the overlap of anode peak due to their closer electrochemical oxidation potentials was solved. Under optimal conditions, the linear responses to DA and PAT were in the range of 1 − 12 μM, 12 − 180 μM and 1 − 14 μM, 14 − 190 μM, respectively. The detection limits (S/N = 3) for DA and PAT were 0.230 and 0.212 μM, respectively. The optimized 3D RGO/MWCNTs@ZrFeO x has good reproducibility, repeatability, stability, selectivity, and can be used to detect DA and PAT simultaneously. In addition, the proposed RGO/MWCNTs@ZrFeO x sensor exhibited a good recovery factor in the analysis of real drug and serum samples with a relative standard deviation of less than 5 %. Importantly, the electroactive area of 3D RGO/MWCNTs@ZrFeO x , and the 2 H + /2e - mechanism of DA and PAT oxidation on the surface of 3D RGO/MWCNTs@ZrFeO x were discussed, which provided a theoretical basis for further understanding of this redox process .
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