CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Shiyou Yu,Zhenge Yue,Xin Wang,Siyao Zhang,Zhuo Zhou,Lan Zhang,Yongqiang Ma
In the present study, we constructed an electrochemical sensor using three materials, namely, cerium dioxide (CeO 2 ) composite platinum (Pt) and polymer 3-amino-5-mercapto-1,2,4-triazole (PTA), prepared by hydrothermal method, to detect xanthines and uric acid. Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier infrared spectroscopy (FT-IR) were used to characterize the morphology, elemental composition, and structure of materials. The results demonstrated that the PTA/CeO 2 @Pt composites were prepared. The electrochemical behavior of xanthines and uric acid on PTA/CeO 2 @Pt composite electrodes was assessed by cyclic voltammetry (CV) and differential pulsed voltammetry (DPV). The results demonstrated that the dropping amount was 20 µL under a phosphoric acid buffer solution (pH 6). The peak current of xanthine (XA) demonstrated two good linear relationships with concentration, the linear regression equation was I XA = 0.3265C XA + 8.1967 R 2 = 0.994 in the concentration range of 10–138 µmol/L, whereas it was I XA = 3.9884C XA + 51.661 R 2 = 0.992 in the concentration range of 139–330 µmol/L. The detection limit was 10.36 × 10 –7 M. The freshness of fish meat was evaluated, and the correlation analysis between evaluation results and results of xanthine detection in fish meat by PTA/CeO 2 @Pt electrochemical sensor demonstrated that r = 0.945 and P < 0.01 had a good correlation. The sensor could be used to determine the xanthine content in fish to reflect the freshness of fish, thus displaying good application prospects.
研究领域:
生物化学
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食品科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2019
·Vol. 43
·期 6
·2075-2085
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IF 3.343
Rong Dai,Ziliang Zheng,Chenshuai Lian,Xing Li,Xu Wu,Xia An,Xianmei Xie
Summary A novel Pt-based Beta encapsulated CeO 2 yolk-shell catalyst was successfully synthesized via a RF layer in the synthetic process. The CeO 2 @Pt-Beta catalyst showed high catalytic activity and stability toward the LT-ESR with respect to the reference Pt-Beta, CeO 2 -Pt-Beta, which benefited from the special yolk-shell structure and the synergistic effect between the CeO 2 movable core and Pt metal. The confinement effect of the yolk-shell architecture contributed to the high dispersion of Pt nanoparticles as well as to the accumulation of reactant molecules in the enclosed void space, which ensured the reactants reacted with CeO 2 and Pt to achieve a complete reaction.
研究领域:
化学工程
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材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
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2024
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IF 5.6
Chen Cui,Naxin Liu,Qiurui Nian,Yuntao Xia,Liuchuang Zhao,Leqian Hu,Hongjuan Bai,Dechen Jiang
Improvement in the sensitivity and accuracy of ECL-based biosensors, to a great extent, depends on the fabrication of high-performance electrochemiluminescence (ECL) sensors. Herein, polyethyleneimine (PEI)-grafted bimetallic ZnNi metal-organic framework (ZnNi-MOF/PEI) nanospheres were synthesized to prepare a L012-based ECL immunosensor for detecting carbohydrate antigen 15-3 (CA15-3). The introduced PEI was utilized not only as a bridging element for L012 luminophore and detection antibody (Ab 2 ) immobilization but also as a co-reactant for generating the self-enhanced ZnNi-MOF/PEI-L012@Ab 2 ECL signal probe. Furthermore, Pt nanoparticle-functionalized CeO 2 nanorods (CeO 2 -Pt) featuring high-efficiency electrocatalytic properties, as a co-reaction accelerator, could catalyze H 2 O 2 to generate abundant reactive oxygen species (ROS), further augmenting the ECL signal of ZnNi-MOF/PEI-L012@Ab 2 . In the presence of CA15-3 antigen, the capture antibody (Ab 1 )-conjugated CeO 2 -Pt complex (CeO 2 -Pt@Ab 1 ) and ZnNi-MOF/PEI-L012@Ab 2 would get closer to each other, with the formation of a "signal-on" sandwich-type ECL immunosensor. The ZnNi-MOF-assisted ECL biosensor achieved a detection limit of down to 5.75✕10 -5 U mL -1 . This work shows distinguished potential for measuring low levels of biomarkers that may help in the clinical diagnosis of breast cancer.
研究领域:
分析化学
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生物化学
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生物医学工程
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癌症研究
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2025
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IF 2.5
Qu Zhengquan,Zhang Baozhong,Liu Xihong,Cui Xiaoying,Zhao Ke,Li Ying,Xie Lingling,Zhu Huina,Chen Hanyu,He Baoshan
Fumonisin B1 (FB1) is a secondary metabolite generated by Fusarium verticillioides , which can widely contaminate crops. Herein, an electrochemical aptamer sensor with high sensitivity and selectivity was constructed for FB1 detection, leveraging the specific recognition capability of aptamers. Polyethylenimine-functionalized cerium dioxide-supported platinum nanoparticles (PEI-CeO 2 @PtNPs) were used for the modification of electrodes. The nanocomposite enhanced electrical conductivity on the electrode, and provided more attachment sites to increase the loading capacity of aptamer chains. Additionally, polyethylenimine-functionalized melamine-cyanuric acid condensation polymers (PEI-MCA) were used as carrier for the signal probe. Because of the unique porous structure and abundant functional groups on the surface of MCA, the loading efficiency of methylene blue (MB) was significantly enhanced, and the complementary DNA (cDNA) strand of aptamers was effectively loaded on PEI-MCA by strong electrostatic interaction to construct signal probes. The cDNA was captured by aptamers through complementary base pairing, and PEI-CeO 2 @PtNPs amplified electrical responses cooperatively with PEI-MCA. In the presence of FB1, the aptamers preferentially bound to FB1, and the signal probes were detached from the electrode surface, resulting in a decrease in the electrochemical response. Under optimal conditions, the dynamic range of the constructed aptasensor was 1 × 10 −1 to 1 × 10 4 pg/mL, with a detection limit of 89 fg/mL. Additionally, the sensor had high selectivity, reproducibility, and stability, and could detect FB1 in milk and corn flour samples.
研究领域:
分析化学
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食品安全
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生物传感器
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纳米材料
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2018
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IF 5.116
Di Zhu,Huiyuan Ma,Haijun Pang,Lichao Tan,Jia Jiao,Tao Chen
A non-enzymatic nanocomposite of 12-heteropolyacids and CeO 2 @Pt alloy nanoparticles decorated by reduced graphene oxide (RGO), was successfully developed by a facile and eco-friendly route for simultaneous determination of xanthine (XA) and uric acid (UA). The surface morphology and structure of the nanocomposite were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and fourier transform infrared spectroscopy (FT-IR), respectively. And then, the electrochemical properties of the nanocomposite were further examined by differential pulse voltammetry (DPV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The as-prepared nanocomposite exhibited excellent sensing performance towards the determination of UA and XA simultaneously with a widely linear range from 4.43 × 10 −7 M to 4.52 × 10 −4 M and 1.25 × 10 −7 M to 5.73 × 10 −4 M, respectively, along with a relatively low detection limit of 5.13 × 10 −8 M and 1.34 × 10 −8 M, mainly because of the synergistic effect of the active components. Meanwhile, the nanocomposite also revealed a superb anti-interference property, as well as good stability and reproducibility. What's more, the nanocomposite was applied in detecting XA and UA in real samples with satisfactory results, demonstrating that the nanocomposite of PMo 6 W 6 /RGO-CeO 2 @Pt would be a good potential candidate sensor for practical detecting xanthine and uric acid.
研究领域:
分析化学
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生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2022
·Vol. 7
·期 45
·e202203391
·
IF 2.307
Qun Xiang,Ruiwen Yan,Guiqi Gao,Shuang Wang
Graphical The PANI-CeO 2 @Pt composites with core-shell structure have been successfully synthesized. Platinum nanoparticles were anchored on the surface of the PANI-CeO 2 materials. The lower potential and higher current density for MOR among the tested PANI@Pt, Pt/C, and CeO 2 @Pt catalysts showed that PANI-CeO 2 @Pt catalyst displayed excellent catalytic performance. This work provided a novel approach to prepare anode catalytic materials and had wide application. Polyaniline (PANI) and Pt were synthesized in sequence by in situ electrochemical deposition on CeO 2 surface to prepare PANI/CeO 2 /Pt ternary composites (PANI-CeO 2 @Pt composites). The electrocatalytic activity of PANI-CeO 2 @Pt composite was measured to 226 mA⋅mg −1 , which was 1.7-, 2.3-, 20-flod as that of CeO 2 @Pt, Pt/C, and PANI@Pt catalyst, respectively. The PANI-CeO 2 @Pt catalyst displayed noticeably the highest activity toward methanol oxidation after the 4000 s among the tested CeO 2 @Pt, Pt/C, and PANI@Pt catalyst. In a CO-stripping experiment, PANI-CeO 2 @Pt composites exhibited better CO tolerance. These results meant that highly dispersed Pt nanoparticles and the oxygen storage capacity of PANI-CeO 2 @Pt contributed to admirable catalytic activities for methanol oxidation reaction (MOR).
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Catalysts
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2020
·Vol. 10
·期 2
·143
·
IF 3.52
Chengxiong Wang,Dezhi Ren,Junchen Du,Qinggao Qin,Aimin Zhang,Li Chen,Hao Cui,Jialin Chen,Yunkun Zhao
Ceria-modified Pt/Al2O3catalyst has been commonly prepared by the impregnation of platinum on ceria-modified alumina and widely applied in the chemical industry and automotive industry. The in situ diffuse reflectance infrared Fourier transformed spectroscopy (DRIFTS), and thermogravimetric (TG) analysis techniques were employed to investigate the typical mechanisms of the bis(ethanolammonium)hexahydroxyplatinate(IV) and cerium nitrate decomposition catalyzed by Ptδ+species for the facile synthesis of CeO2-Pt/Al2O3catalyst. It was found that Pt4+-catalyzed decomposition of cerium nitrate leads to the higher dispersity of ceria and forming more active oxygen species, on the basis of X-ray diffraction (XRD) and H2temperature-programmed reduction (H2-TPR) results. The in situ activity measurements were also performed to investigate the reaction mechanisms and the specific activities for the catalytic CO, NO, C3H6and C3H8co-oxidation. The results indicate that undesirable N2O by-product is formed by the selective catalytic reduction (SCR) of NO by C3H6below 350 °C. The cerium addition effectively improves the activity of catalytic oxidation, but exhibits an increased N2O yield, due to the increased reducibility.Keywords:platinum;ceria;in situ characterization;catalytic oxidation
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Tongkai Ji,Jiaojiao Li,Chaonan Jiao,Jing Wang,Xingwei Cai
The core–shell nanoreactor with unique structure (such as a protective shell, a fixed or movable core, and the void space between the core and the shell) and adjustable function has attracted great attention in the field of catalysis. In this work, a novel core–shell nanoreactor sSiO 2 @CeO 2 /Pt@mSiO 2 was designed and exploited as nanozyme in biosensing applications. The sSiO 2 @CeO 2 /Pt@mSiO 2 demonstrated improved peroxidase-like performance on account of the unique structure and the synergetic effect between CeO 2 and Pt. Based upon the peroxidase-like activity of sSiO 2 @CeO 2 /Pt@mSiO 2 , a colorimetric essay was developed for the ultrasensitive sensing of ascorbic acid (AA) owing to the excellent reducibility of AA. It was found that the absorbance of the oxidized TMB (ox-TMB) at 652 nm exhibited good linearity towards the concentration of AA in the range of 0–30 μM with the limit of detection as low as 16.4 nM. Furthermore, an enzyme cascade-triggered colorimetric reaction for the detection of alkaline phosphatase (ALP) was built on the basis of the excellent peroxidase-like activity of sSiO 2 @CeO 2 /Pt@mSiO 2 . ALP can catalyze the hydrolysis of AAP to produce AA, and the in situ generated AA can initiate the reduction of the ox-TMB produced in the system of sSiO 2 @CeO 2 /Pt@mSiO 2 -H 2 O 2 -TMB. The assay for the colorimetric sensing of ALP exhibited superior performance as compared to other methods with linear response of 5 × 10 -4 –1.4 U L -1 and lower detection limit of 9.3 × 10 -4 U L - 1 . This study not only provides a method to fabricate a nanozyme with high performance, but also offered a simply and ultrasensitive assay for the colorimetric analysis of AA and ALP.
研究领域:
生物传感
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纳米医学
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催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）