ELECTROCHEMISTRY COMMUNICATIONS
·
2012
·
IF 4.859
Xiangheng Niu,Chen Chen,Hongli Zhao,Jie Tang,Yuxiu Li,Minbo Lan
A new screen-printed carbon electrode with porous architectures prepared using an extremely facile and low-cost approach is introduced. The preparation mainly involved a printing procedure of a graphite-based layer doped with CaCO 3 powders and a subsequent dissolution of these powders. The resulting porous screen-printed carbon electrode (P-SPCE) can offer large surface, broad potential window, low background current and high electrochemical reactivity. Moreover, the proposed P-SPCE provides enhanced performance for enzyme-free H 2 O 2 sensing compared to conventional glassy carbon electrodes and screen-printed carbon electrodes. These attractive properties of the P-SPCE are expected to be of wider applications.
研究领域:
生物化学
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材料科学
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分析化学
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产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 3
·1261
·
IF 3.4
Qian Wang,Yuzhe Wang,Guiyong Xiao,Xinde Zhu
In this work, the facile fabrication of Co3O4particles/reduced graphene oxide (Co3O4/rGO) composites on Indium tin oxide (ITO) slide was achieved by an electrophoretic deposition and annealing process. The deposition time and ratio of the precursors were optimized. Structural characterization and chemical composition investigation indicated successful loading of Co3O4particles on graphene sheets. When applied as a non-enzymatic H2O2sensor, Co3O4/rGO showed significant electrocatalytic activity, with a wide linear range (0.1–19.5 mM) and high sensitivity (0.2247 mA mM−1cm−2). The good anti-interference ability, reproducibility, and long-term stability of the constructed sensor were also presented. The application of Co3O4/rGO in real sample analysis was evaluated in human urine sample with satisfactory results, indicating the feasibility of the sensor in physiological and medical applications.
研究领域:
材料科学
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生物医学工程
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分析化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wanwan Li,Jiao Liu,Chao Chen,Yidong Zhu,Nan Liu,Yuman Zhou,Siru Chen
It is urgent to develop highly active catalysts toward hydrogen peroxide (H 2 O 2 ) sensor in many industrial and biological processes, which usually is limited by high cost of instrumentation requirements and low-accuracy detection at low level. Herein, Cu 2 O@Cu 9 S 5 yolk-shell nanospheres has been synthesized via a facial wet chemical method and applied as electrocatalyst for non-enzymatic H 2 O 2 sensor. These Cu 2 O@Cu 9 S 5 yolk-shell nanospheres with mean sizes of 230 nm consisting of Cu 2 O conductive core and Cu 9 S 5 shell show numerous advantageous characteristics of well-sustained structural integrity, the homogeneous particle size distribution and visible mesoporosity morphology. The significantly improved electrocatalytic activity by catalyzing H 2 O 2 of the Cu 2 O@Cu 9 S 5 yolk-shell nanospheres as a sensor has been obtained by comparing with those neat Cu 2 O nanospheres and Cu 9 S 5 hollow nanospheres. This noticeable property is largely due to the synergistic catalysis effect of the contribution of the Cu 2 O and Cu 9 S 5 . Cu 2 O@Cu 9 S 5 yolk-shell nanospheres based non-enzymatic H 2 O 2 sensor displays the relatively wide linear range from 0.1 μM to 3.5 mM with a high sensitivity of 299.74 μA mM −1 cm −2 but low detection limit of 28.83 nM (S/N ≥ 3) for electrochemical detection of H 2 O 2 , which is potentially superior to other similar Cu 2 O-based sensors that has been reported in the literatures. Additionally, this sensor also demonstrates excellent selectivity of H 2 O 2 in the presence of various coactive interferences. This novel Cu 2 O@Cu 9 S 5 yolk-shell nanospheres electrocatalyst provides a broad application prospect for H 2 O 2 sensing.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Tongtong Zhai,Luyao Zhang,Sipeng Tian,Zhangpeng Xu,Xiushuang Fan,Jing Li,Erkang Wang
Chemiluminescence (CL) as a powerful analytical tool has garnered increasing interest. However, traditional molecular-based CL luminophores suffer from low emission efficiency due to limited total CL photons emitted per luminophore, driving efforts to explore amplified strategies or novel probes to boost the emission. Although metal nanoclusters (NCs) as luminescent nanoprobes have been extensively studied for electrochemiluminescence and photoluminescence (PL) owing to their intriguing luminescent properties, the CL performance using metal NCs as emitters is often ignored. Herein, based on the synergistic effect within the bimetallic NCs, a series of glutathione-coated Au–Ag bimetallic NCs (GSH-AuAg NCs) were optimized by adjusting precursor ratios and achieved the maximum CL response at a Au:Ag molar ratio of 5:1. To our surprise, CL emission with GSH-AuAg NCs as emitters was triggered with oxidant reagents such as KMnO4, and bimetallic NCs display boosted CL emission (ca. 6.2-fold) compared to monometallic NCs owing to the synergistic effect on enhancing the emission efficiency. Surface-defect-involved CL was revealed by collecting the CL spectra with a maximum emission wavelength of around 750 nm and an obvious red shift of 140 nm compared to PL spectra. The mechanism reveals the KMnO4-injected hole into the valence band through redox reactions with GSH ligands, leading to CL emission by efficient radiative charge recombination with pre-existing electron. A sensing platform based on the GSH-AuAg NCs/oxidant system was constructed for sensing H2O2 and glucose, demonstrating the potential of GSH-AuAg NCs as CL emitters in analytical applications.
研究领域:
分析化学
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生物分析
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纳米材料科学
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2024
·Vol. 11
·期 24
·2400234
·
IF 4.3
Xue Shang,Panpan Chen,Wei Ling,Tian Hang
A novel synthesis strategy for hierarchical polypyrrole nanopillar/silver nanoparticle arrays is designed and its application as an antibacterial surface and nonenzymatic H 2 O 2 sensor is explored. The hierarchical structure is fabricated using a microporous membrane-templated method by multiple steps. Using a polypyrrole nanopillar array as the matrix, silver nanoparticles can be uniformly reduced and stably anchored onto the nanopillar array by a redox reaction in a AgNO 3 solution. The morphology, structural characteristics, conductivity, and reaction mechanisms of the composites are studied in detail. The incorporation of Ag nanoparticles not only significantly enhanced the antibacterial activity of the surface, but also contributed to the excellent ability to detect H 2 O 2 . This work provides a versatile approach to achieve the controlled fabrication of hierarchical metal-conducting polymer composite structures and demonstrates them as promising multifunctional interfaces with antibacterial and sensing activity.
研究领域:
材料科学
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生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 46
·24256-24262
·
IF 3.708
Bang Lin Li,Hong Qun Luo,Jing Lei Lei,Nian Bing Li
Hemin-functionalized MoS2 nanosheets (hemin/MoS2-NSs) are first obtained via van der Waals interactions between few-layered MoS2 nanosheets (MoS2-NSs) and hemin molecules. It is demonstrated that a portion of MoS2-NSs undergoes a phase transition from semiconducting to metallic phase under the influence of hemin, which shows the coexistence of semiconducting and metallic phases in the crystal structure of hemin/MoS2-NSs. MoS2-NSs prepared from sonication-induced exfoliation of bulk MoS2 crystals in aqueous surfactant solution exhibit intrinsic peroxidase-like activity for the oxidation of 3,3,5,5-tetramethylbenzidine in the presence of H2O2, which is further improved by the functionalization of hemin. Significantly, MoS2-NSs are presented as a new support of hemin, and when compared to MoS2-NSs, hemin/MoS2-NSs exhibit better dispersity in aqueous solution, which is used in the development of H2O2 sensor based on the enhanced peroxidase-like activity.
研究领域:
材料科学
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生物化学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Zhijun Liu,Li Wang,Pengfei Liu,Kairen Zhao,Shuying Ye,Guoxi Liang
Hydrogen peroxide (H 2 O 2 ) is usually used as a fungicide in food, it is carcinogenic, accelerates aging or inducing toxic effects such as cardiovascular disease. Herein, to meet the demand for effective and fast detection of H 2 O 2 in food, a novel non-enzymatic electrochemiluminescence (ECL) sensor based on single-stranded DNA (ssDNA)/g-C 3 N 4 nanosheets (NS) was established. The ssDNA/g-C 3 N 4 NS hybrid was prepared by simple mixing g-C 3 N 4 NS and ssDNA solution together. The prepared ssDNA/g-C 3 N 4 NS exhibited improved peroxidase-like activity and was modified on a glassy carbon electrode to catalyze the ECL reaction of luminol-H 2 O 2 to amplify the luminescence signal. Under the optimized conditions, the proposed sensor exhibits high sensitivity with a limit of detection (LOD) as low as 33 aM H 2 O 2 , which is much lower than the vast majority of reported methods. This method enables the reliable responding to H 2 O 2 from the milk samples within 1 min.
研究领域:
分析化学
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食品科学
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纳米技术
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 28
·22060-22065
·
IF 3.84
Juan Yang,Faqiong Zhao,Baizhao Zeng
A copper-based metal–organic framework–graphene nanocomposite (Cu-MOF–GN) (i.e. Cu3(BTC)2, BTC = 1,3,5-benzene-tricarboxylate) was prepared by a facile one-step method for the first time. Unlike the conventional strategies, in this procedure graphene oxide was reduced to GN by an endogenous reducing agent produced by dimethylformamide, which was used as solvent in the synthesis of Cu-MOF. The nanocomposite exhibited high stability due to the hydrogen bonding, π–π stacking and Cu–O coordination between Cu-MOF and GN. Owing to the synergetic effect of Cu-MOF and GN, the Cu-MOF–GN nanocomposite showed high electrocatalytic activity. When it was used for constructing H2O2 and ascorbic acid sensors, it presented good performance. Thus, the Cu-MOF–GN nanocomposite has potential applications in the electrochemical field.
研究领域:
材料科学
·
纳米技术
·
电化学
·
传感器
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）