Surfaces and Interfaces
·
2021
·
IF 4.837
Nanyu Fan,Quan Kong,Ruifeng Lang,Hongtao Guan,Gang Chen,Chengjun Dong
One-dimensional (1D) Zn 2 GeO 4 rods were in-situ grown on Ni foam (NF) using a ethylenediamine (En)/water mixed solvent by a hydrothermal route in one single step. Such rhombohedral phase Zn 2 GeO 4 rods are 1–2 μm in diameter and a few micrometers in length. Ethylenediamine is found to play a critical role in coordinating with starting zinc and germanium ions and acting as template. The Zn 2 GeO 4 /NF was developed as a new none-enzymatic hydrogen peroxide (H 2 O 2 ) sensor. In electrochemical studies, the Zn 2 GeO 4 /NF electrode exhibits high sensitivity (3974 μM mM −1 cm −2 ), wide linear detection range (1–4000 μM), fast response (<9 s), low detection limit (1 μM), excellent selectivity and stability towards H 2 O 2 . Several factors such as intrinsic nature of Zn 2 GeO 4 , the unique microstructure and the seamless contact with NF are believed to attributed to the excellent electrochemical sensing performances.
研究领域:
材料科学
·
生物传感技术
✓ 已验证
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Qin Zhu,Bo Liang,Yu Cai,Qingpeng Cao,Tingting Tu,Bobo Huang,Lu Fang,Xuesong Ye
Layer-by-layer chitosan-decorated pristine graphene on screen-printed electrodes was achieved by one-step electrodeposition method and an enzyme-free hydrogen peroxide electrochemical biosensor was fabricated for its application. Negatively charged pristine graphene absorbed with positively charged chitosan by electrostatic interactions was electrodeposited on the electrodes. The successful immobilization of pristine graphene was confirmed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and electrochemical characterizations. The graphene-chitosan volume ratio and cyclic voltammetry scan cycles during the electrodeposition process were optimized. The resulting hydrogen peroxide biosensors showed a 178 times improved sensitivity and exhibited two wide linear detection ranges from 20 μM to 20 mM and from 20 mM to 60 mM. The biosensors also showed a good reproducibility, stability, selectivity and could be used in real samples detection. The superior electrochemical performance of graphene-chitosan was attributed to the preservation of excellent properties of pristine graphene, and the formation of layer-by-layer structure with high surface area. The proposed strategy of direct immobilization of pristine graphene can be extended for the immobilization of other nanomaterials and biomolecules.
研究领域:
材料科学
·
生物传感技术
·
电化学分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Wenjie Yang,Ling Wang,Yuehua Li,Huizhu Zhou,Zhangxing He,Honghao Liu,Lei Dai
A limiting current hydrogen sensor was successfully prepared by the co-pressing and co-sintering method using proton-electron mixed conductor BaHf 0.8 Fe 0.2 O 3-δ as the dense diffusion barrier instead for small hole and BaHf 0.7 Sn 0.1 In 0.2 O 3-δ as proton conducting electrolyte. The BaHf 0.8 Fe 0.2 O 3-δ and BaHf 0.7 Sn 0.1 In 0.2 O 3-δ powders were synthesized by high temperature solid state method. The phase composition, microstructure, chemical stability and conductivity of materials were characterized. Sensing performance of the hydrogen sensor was tested. The results show that dense BaHf 0.8 Fe 0.2 O 3-δ and BaHf 0.7 Sn 0.1 In 0.2 O 3-δ layer are closely combined together by the co-pressing and co-sintering technique at 1600 °C for 8 h and clear boundaries are observed between two pure perovskite phases. BaHf 0.8 Fe 0.2 O 3-δ shows excellent chemical stability for pure H 2 and CO 2 , water steam and 200 ppm H 2 S/Ar. Meanwhile, as the dense diffusion barrier, BaHf 0.8 Fe 0.2 O 3-δ possesses considerable proton and electron conductivity compared with small hole. The sensor shows a stable limiting current platform in 0–600 ppm H 2 at 400–600 °C at a certain voltage range due to dense BaHf 0.8 Fe 0.2 O 3-δ layer forming diffusion control. The limiting current (ΔI L ) has a good linear dependence on the hydrogen concentration. In addition, there is a good linear relationship between log(I L T) and 1000/T, and the Arrhenius model of limiting current is log(I L T) = 6.21-4.96 × 1000/T, and the hydrogen diffusion activation energy is 0.98 eV. The sensor has good long-term stability and high anti-interference capability to O 2 , CO 2 or H 2 S, but water vapor has a certain effect on sensing performance.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
·
2024
·Vol. 24
·期 19
·6420
·
IF 3.4
Cheng Zou,Cheng Peng,Xiaopeng She,Mengqing Wang,Bo Peng,Yong Zhou
Pure tin oxide (SnO2) as a typical conductometric hydrogen sulfide (H2S) gas-sensing material always suffers from limited sensitivity, elevated operation temperature, and poor selectivity. To overcome these hindrances, in this work, hollow CuO-SnO2nanotubes were successfully electrospun for room-temperature (25 °C) trace H2S detection under blue light activation. Among all SnO2-based candidates, a pure SnO2sensor showed no signal, even toward 10 ppm, while the 1% CuO-SnO2sensor achieved a limit of detection (LoD) value of 2.5 ppm, a large response of 4.7, and a short response/recovery time of 21/61 s toward 10 ppm H2S, as well as nice repeatability, long-term stability, and selectivity. This excellent performance could be ascribed to the one-dimensional (1D) hollow nanostructure, abundant p-n heterojunctions, and the photoelectric effect of the CuO-SnO2nanotubes. The proposed design strategies cater to the demanding requirements of high sensitivity and low power consumption in future application scenarios such as Internet of Things and smart optoelectronic systems.
研究领域:
材料科学
·
传感器技术
·
纳米科技
✓ 已验证
DOI
PubMed
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 16
·8162-8176
·
IF 5.8
Xinmeng Zhang,Mingyue Bai,Lei Ge,Yuanyuan Yao
The slow redox rate of hydrogen peroxide (H2O2) in neutral environments makes the H2O2 sensor inadequate for the detection of low levels of signalling molecules. The aim of this study is to fabricate a flexible sensing electrode by hydrothermally loading micro-nanometer Ni and Co(OH)2 on carbon cloth (CC) and electrochemically depositing poly(3,4-ethylenedioxythiophene) (PEDOT) on the surface of the electrode. The sensor presented high sensitivity (10.43 mA mM−1 cm−2), a wide detection range (0.033–120.848 mM), a low detection limit (0.92 nM), high stability, and excellent anti-interference performance in neutral solutions. Ni–Co(OH)2 provides abundant active sites while CC solves their agglomeration phenomenon and conductivity. The PEDOT film offers heightened conductivity, hydrophilicity, interfacial stability, and an electrochemically active surface area (ECSA). The side area of the chrysanthemum petal like PEDOT is 39 ± 7 times the bottom area, and PEDOT increases the ECSA of the composite to six times that of CC. Electrochemical precise control of PEDOT morphology to improve sensor performance provides a new strategy for the application of PEDOT in sensors.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2015
·Vol. 2
·期 12
·2061-2070
·
IF 0
Sheng-Hui Liao,Shi-Yu Lu,Shu-Juan Bao,Ya-Nan Yu,Ling Yu
Graphical You spin me right round : Porous WO 3 , Co 3 O 4 , and CoWO 4 are fabricated by using an electrospinning technique followed by high-temperature calcination. The different NFs are used to modify biosensor electrodes and detect H 2 O 2 without the help of enzymes. The results provide a new insight that enables excellent nonenzymatic biosensors to be explored. In this work, porous WO 3 , Co 3 O 4 , and CoWO 4 nanofibers (NFs) were fabricated by using an electrospinning technique followed by high-temperature calcination. The different NFs were used to modify biosensor electrodes and detect H 2 O 2 without the help of an enzyme. The electrochemical results indicated that the CoWO 4 NF-based sensor presented a remarkable electrocatalytic activity towards H 2 O 2 oxidation, including lower redox potential, lower detection limit, fast response, as well as the widest linear range among our designed biosensors of this type. Furthermore, we found that the ideal test potential of a nonenzymatic biosensor is closely dependent on the composition of the detected electrode surface, and the test potential has a great effect on the detection linear range of nanomaterial-based biosensors. The results of this work provide a new way to explore excellent nanomaterials for modifying nonenzymatic biosensor electrodes.
研究领域:
材料科学
·
生物传感
·
电化学
✓ 已验证
DOI
BIOSENSORS & BIOELECTRONICS
·
2010
·
IF 5.429
Shujun Ji,Qingqing Guo,Qiaoli Yue,Lei Wang,Huaisheng Wang,Jinsheng Zhao,Ruixin Dong,Jifeng Liu,Jianbo Jia
Fabrication of sub-monolayer array of Pt nanoparticles (PtNPs) assembled at nucleobases terminated layers and their application into H 2 O 2 and glucose sensing were reported. To prepare such a PtNPs assembly, 3-mercaptopropionic acid (MPA), Zr 4+ , nucleotide-5′-monophosphate (NTMP including guanosine, adenosine, cytidine, uridine-5′-monophosphate, and abbreviations were GMP, AMP, CMP, UMP, respectively) were adsorbed onto Au substrate sequentially to form nucleobases terminated surface and Zr 4+ acted as binder to link carboxylic and phosphoric groups (NTMP/Zr 4+ /MPA/Au). Complexation of cisplatin, cis-Pt(NH 3 ) 2 Cl 2 , with terminated nucleobases and following electrochemical reduction of surface-bound cisplatin gave PtNPs attached surface. Different PtNPs coverage or particle density was obtained depending on the NTMP used and decreased in the order: PtNPs/GMP/Zr 4+ /MPA/Au > PtNPs/AMP/Zr 4+ /MPA/Au > PtNPs/CMP/Zr 4+ /MPA/Au > PtNPs/UMP/Zr 4+ /MPA/Au. The surface loading of Pt was between 160 and 16 ng/cm 2 . The as prepared PtNPs can be used as electrocatalysts for H 2 O 2 sensing (detection limit of H 2 O 2 < 100 nM) and the sensitivity increased with decreasing PtNPs density. After adsorption of glucose oxidase, the modified electrode can be used as enzymatic electrode for glucose sensing and a detection limit of 38.5 μM was achieved. This study provided an example of fabricating PtNP arrays utilising surface complexation of cisplatin with nucleobases. The advantage of this method is that the NP density can be controlled through changing nucleobases or Pt complexes used to obtain suitable kinetics of the complexation reactions. Additionally, the PtNPs sub-monolayer as prepared has high sensitivity for H 2 O 2 sensing even at a very low loading of Pt.
研究领域:
生物化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2022
·Vol. 147
·期 23
·5324-5333
·
IF 5.227
Jie Zhang,Xue-Ji Zhang,Serge Cosnier,Dan Shan
In the rapid development of artificial nanomaterials comparable to biological enzymes, we propose herein a novel concept for the construction of functional materials inspired from chemical evolution. To mimic the formation process of the catalytic system for the origin of life, dicyandiamide (DCD) was used as an elemental molecule for the de novo synthesis of an electrocatalyst. DCD was initially condensed with glucose (Glu) to form carbon dots (CDs) via a hydrothermal method. The self-assembly of the DCD-derived CDs was then modulated by introducing copper ions and a controlled pyrolysis process. Carbonization of the self-organized DCD-CDs/Cu at 300 °C in air produced the resultant catalyst (DCD-CDs/Cu-300) with the crystalline properties of a transitional state from an organic to inorganic matter, possessing a well-tuned chemical composition and the enhanced electrochemical signal of H2O2 reduction. Therefore, the DCD-CDs/Cu-300 modified electrode provides satisfactory analytical performance for trace H2O2 quantification with a wider linear range (1.0 × 10−7 to 1.4 × 10−3 M) and low detection limit (6.4 × 10−8 M, S/N = 3). This facile electrocatalyst construction strategy inspired from chemical evolution is expected to pave the way to form a more unified paradigm by integrating nanotechnology.
研究领域:
材料科学
·
分析化学
·
仿生学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhouling Wu,Zhixuan Zhang,Zhiqi Liang,Li Cheng,Shuang Yang,Zhengxing Jiang,Yurong Qi,Zufei Hu,Yang Yang
Crystal plane engineering is an emerging strategy for enhancing the surface activity of catalysts, but there is little research on how crystal planes affect electrochemical non-enzymatic H 2 O 2 sensors. We synthesize four distinct NiCo 2 O 4 nanocrystals with different crystal planes and investigate their impact on electrochemical non-enzymatic H 2 O 2 sensing through a systematic combination of experimental and theoretical approaches. NiCo 2 O 4 nanosheets exposing the {3 1 1} crystal plane (311-NS) demonstrate the highest electrocatalytic activity for H 2 O 2 oxidation, with excellent selectivity, repeatability, reproducibility, and long-term stability. The H 2 O 2 detection performance of NiCo 2 O 4 with is consistent with the total amount of surface Co 3+ and Ni 3+ , indicating that the Co 3+ and Ni 3+ exhibit higher activity for H 2 O 2 oxidation. Our density functional theory calculations attribute the superior sensing performance of 311-NS primarily to its high dangling bond density of Co(III) and Ni(III) and its increased surface energy, both facilitate the oxidation of H 2 O 2 . We additionally construct a 311-NS/rotating disk electrode sensor that detects H 2 O 2 in real samples with accuracy comparable to that of high-performance liquid chromatography, highlighting its potential for applications in environmental monitoring and food safety. This study not only broadens our understanding but also demonstrates that selective exposure of specific crystal planes enhances electrochemical non-enzymatic H 2 O 2 sensing performance, an insight to guide development of future peroxide sensors.
研究领域:
材料科学
·
电化学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chao Zhang,Kaidi Wu,Hanlin Liao,Marc Debliquy
Pristine Bi 2 WO 6 nanosheets and hierarchical WO 3 -Bi 2 WO 6 microflowers were prepared via a facile hydrothermal technique. WO 3 -Bi 2 WO 6 microflowers were assembled with thin nanosheets, where WO 3 nanoparticles were uniformly loaded. The H 2 S sensing properties of pristine Bi 2 WO 6 nanosheets and hierarchical WO 3 -Bi 2 WO 6 microflowers were systematically investigated at room temperature. 20 WO 3 -Bi 2 WO 6 microflowers sensor displayed the best sensing property towards ppb-level H 2 S compared with all other samples. The enhancement was ascribed to the catalytic effect of WO 3 nanoparticles and the modified microstructure with large specific surface areas. Moreover, the n–n heterojunction structures also increase the thickness of electron depletion layer and potential barrier height, which could efficiently improve the sensing properties. The practical application of 20 WO 3 -Bi 2 WO 6 microflowers sensor in detecting the volatiles of Pangasius was also studied in this work. Therefore, the hierarchical WO 3 -Bi 2 WO 6 microflower is a promising ppb-level H 2 S sensing material for environment monitoring and fish freshness detection.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2012
·
IF 3.898
Lu Kang,Huiyuan Ma,Yan Yu,Haijun Pang,Yongbin Song,Di Zhang
A multilayer film based on a crown-shaped phosphotungstate K 28 Li 5 H 7 P 8 W 48 O 184 ·92H 2 O (P 8 W 48 ) and cationic chitosan has been fabricated on quartz, silicon , and ITO substrates via the layer-by-layer (LbL) self-assembly technique. The {PEI/(P 8 W 48 /chitosan) n } multilayer film was characterized by UV–vis spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD) and cyclic voltammetry (CV) measurements. The multilayer film exhibited good amperometric sensing performance toward H 2 O 2 in a wide domain of pH 1–8. In pH 5, this H 2 O 2 sensor has a linear range of 2.5 × 10 −5 to 2.3 × 10 −3 M, a low detection limit of 1.3 μM (S/N = 3), a high sensitivity of 0.53 mA mM −1 H 2 O 2 , and an excellent anti-interference property in the presence of common interfering species, such as ascorbic acid , glucose, uric acid , NaNO 2 , KBrO 3 , formic acid , Na 2 SO 3 , NaNO 3 and acetic acid.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Su-Juan Li,Jing-Chao Zhang,Juan Li,Hong-Yuan Yang,Jing-Jing Meng,Bing Zhang
In this paper, a 3D sandwich structured hybrid of gold nanoparticles (AuNPs) decorated MnO 2 /graphene (GP)-carbon nanotubes (CNTs) was prepared via three steps, and the resultant AuNPs/MnO 2 /GP-CNTs hybrids was characterized by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) detector and X-ray diffraction (XRD) spectrum, respectively. In this structure, the peeled GP nanosheets from CNTs work as linkers with CNTs to form 3D scaffold for facilitating fast electron conduction. The MnO 2 nanoparticles well distributed on the GP-CNTs scaffold have excellent electrocatalytic activities towards H 2 O 2 , serving as active materials for fabricating electrochemical H 2 O 2 sensors. AuNPs ( < 10 nm) uniformly distributed on the MnO 2 surface not only further enhance the electric conductivity, but also provide a second active material for sensing H 2 O 2. As a result, taking full advantage of the synergistic effect among AuNPs, MnO 2 and GP-CNTs scaffold, the as-prepared AuNPs/MnO 2 /GP-CNTs hybrids showed excellent electrocatalytic activity towards H 2 O 2 with ultrahigh detection sensitivity of 452 μA mM −1 cm −2 and low detection limit of 0.1 μM (S/N = 3). In addition, the prepared H 2 O 2 sensor was applied for the determination of real samples with satisfactory results, indicating that the prepared sensors are promising in practical application.
研究领域:
材料科学
·
生物医学工程
·
电化学
✓ 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）