ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2022
·Vol. 414
·期 12
·3571-3580
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IF 4.478
Ye Cui,Xu Fan,Ullah Fateh,Wang Minqiang
Photoelectrochemical (PEC) detection as a potential development strategy for Cu 2+ ion sensor has arisen extensive attention. Herein, CdS/Ti 3 C 2 heterostructure was synthesized by electrostatically driven assembly and hydrothermal method. On the basis of a CdS/Ti 3 C 2 heterostructure, a novel anodic PEC sensing platform was constructed for highly sensitive detection of trace amount of Cu 2+ . Carrier transport at the interface of CdS/Ti 3 C 2 heterostructure was tremendously improved, due to the generation of effective Schottky junctions. Under visible light irradiation, the CdS/Ti 3 C 2 heterostructure-modified PEC platform exhibits great anode photocurrent signal, and the formation of Cu x S reduces the PEC response with the presence of Cu 2+ as a representative analyte. Thus, the linear response of Cu 2+ ranges from 0.1 nM to 10 µM and the limits of detection (LOD, 0.05 nM) are obtained, which is lower than that of WHO’s Guidelines for Drinking-water Quality (30 μM). This idea of component reconstitution provides a new paradigm for the design of advanced PEC sensors. Graphical abstract
研究领域:
材料科学
·
分析化学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Qian Fu,Chenxi Wang,Jia Chen,Yilin Wang,Chunyan Li,Yixi Xie,Pengcheng Zhao,Junjie Fei
Dopamine is an important neurotransmitter that has a crucial impact on the physiological health of the human body. Consequently, it is necessary to establish a highly selective and sensitive method for the determination of dopamine levels in serum. In this work, g-C 3 N 4 and BiPO 4 /BiOCl (BPCl) were used as optoelectronic materials to construct a novel dopamine photoelectrochemical sensor. Moreover, the optoelectronic materials were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy and steady-state fluorescence spectroscopy . Meanwhile, the photoelectrochemical performance of the modified electrodes with different materials was investigated, and the results showed that BPCl/C 3 N 4 /GCE has excellent photoelectrochemical performance. Concomitantly, the dopamine photoelectrochemical sensor also has a wide detection range (0.05–10 μM) and limit of detection (LOD = 0.023 μM). Furthermore, it has good reproducibility, selectivity and stability, which can be used in the actual sample detection of serum.
研究领域:
生物医学工程
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分析化学
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DOI
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 7
·969-978
·
IF 3.1
Zuxing Zhang,Mingqing Li,Liying Zhai,Jiahui Wu,Li Li
A ternary nanocomposite photoelectrode composed of cadmium sulfide (CdS), polyaniline (PANI), and bismuth vanadate (BiVO4) was successfully designed by combining cyclic voltammetry (CV) with electrochemical deposition and high-temperature calcination. The first synthesized CdS/PANI/BiVO4 composite was used as a photoelectrochemical (PEC) monitoring platform for glutathione (GSH). The ternary CdS/PANI/BiVO4 nanocomposites exhibited higher PEC activity, which was attributed to the accelerated electron transfer by the loading of CdS and PANI, which enables the material surface to better adsorb the electrons separated by GSH, thereby oxidizing it into GSSH. The photoanodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectroscopy, and photoelectrochemical experiments. Under the optimal experimental conditions, the BiVO4 electrode modified with CdS and PANI exhibited a linear response in the concentration range of 0.1–20 μM with a sensitivity of 0.669 μA mM−1 cm−2 and a detection limit of 40 nM. Moreover, the PEC sensor exhibits good reproducibility and long-term stability. In summary, the designed materials have excellent electrochemical properties, which make them ideal candidates for PEC detection of GSH.
研究领域:
分析化学
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材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 7
·1-7
·
IF 5.705
Wang Panpan,Cao Ling,Wu Ying,Di Junwei
Under visible-light irradiation, a cathodic photoelectrochemical (PEC) sensor is presented for highly sensitive determination of Cr(VI) at a potential of −0.25 V (vs SCE). PbS quantum dots (QDs) were capped with mercaptoacetic acid and assembled on the surface of an indium tin oxide (ITO) electrode via the linker poly(diallyl dimethyl ammonium chloride) providing a photoactive sensor. Cr(VI) accepts the photoelectrons generated by the PbS QDs. This promotes the separation of electron holes and enhances the cathodic photocurrent generated by a 470-nm LED. The sensor has 10 pM detection limit and a linear working range from 0.02 nM to 2 μM of chromate. The method was successfully applied to the determination of Cr(VI) and total chromium in spiked environmental water samples.
Schematic illustration of the photocurrent enhancement response of ITO/PbS toward chromium(VI). In the presence of Cr(VI) (red line), Cr(VI) accepts the photoelectrons generated by the PbS QDs under 470-nm LED irradiation, resulting in improved photocurrent of ITO/PbS.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Haoran Cheng,Yifan Wang,Yirui Zhao,Hongman Hou,Gongliang Zhang,Jingran Bi,Shuang Yan,Hongshun Hao
Salmonella enteritidis ( SE ) is a food-borne pathogens that can cause acute gastroenteritis. With the increasing social attention to food safety, the detection method of SE has attracted wide attention. In response to the demand for efficient detection methods of SE , this study constructed a novel dual-mode photoelectrochemical-electrochemical (PEC-EC) aptamer-based biosensor. The sensor was constructed using Bi 4 NbO 8 Cl/In 2 S 3 heterojunction as the electrode substrate material, the hybridization chain reaction (HCR) and dye sensitization were used as the signal amplification strategies. Bi 4 NbO 8 Cl/In 2 S 3 heterojunction could provide an excellent initial photocurrent response for the sensing platform, and the HCR was opened by the end of complementary DNA (cDNA) and generated an ultra-long DNA double-stranded (dsDNA) “super structure” on the surface of the electrode, which could be embedded with a large number of methylene blue (MB) as the bifunctional probes. Thus, dual-mode output was achieved via the PEC and EC activity of MB. Under the optimized conditions, the PEC and EC signal responses of the system were linear to the logarithm of SE concentration in a range from 1.5 × 10 2 CFU/mL to 1.5 × 10 7 CFU/mL. The detection limits were found to be 12.9 CFU/mL and 12.3 CFU/mL using the PEC and EC methods, respectively. The constructed dual-mode biosensor exhibited good performance for real sample analysis, and demonstrated great application potential in the field of SE rapid detection. Moreover, this dual-mode detection strategy provided more accurate and reliable results than the single-mode output.
研究领域:
食品科学
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生物传感技术
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微生物检测
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Nan Zhang,Shuangming Guo,Yaxiling Wang,Chunyuan Zhu,Peiwen Hu,Hong Yang
Background Presently, glyphosate (Gly) is the most extensively used herbicide globally, Nevertheless, its excessive usage has increased its accumulation in off-target locations, and aroused concerns for food and environmental safety. Commonly used detection methods, such as high-performance liquid chromatography and gas chromatography , have limitations due to expensive instruments, complex pre-processing steps, and inadequate sensitivity. Therefore, a facile, sensitive, and reliable Gly detection method should be developed. Results A photoelectrochemical (PEC) sensor consisting of a three-dimensional polymer phenylethnylcopper/nitrogen-doped graphene aerogel (PPhECu/3DNGA) electrode coupled with Fe 3 O 4 NPs nanozyme was constructed for sensitive detection of Gly. The microscopic 3D network of electrodes offered fast transfer routes for photo-generated electrons and a large surface area for nanozyme loading, allowing high signal output and analytical sensitivity. Furthermore, the use of peroxidase-mimicking Fe 3 O 4 NPs instead of natural enzyme improved the stability of the sensor against ambient temperature changes. Based on the inhibitory effect of Gly on the catalytic activity Fe 3 O 4 NPs, the protocol achieved Gly detection in the range of 5 × 10 −10 to 1 × 10 −4 mol L −1 . Additionally, feasibility of the detection was confirmed in real agricultural matrix including tea, maize seedlings, maize seeds and soil. Significance This work achieved facile, sensitive and reliable analysis towards Gly, and it was expected to inspire the design and utilization of 3D architectures in monitoring agricultural chemicals in food and environmental matrix.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2016
·
IF 2.822
Longhua Ding,Chao Ma,Li Li,Lina Zhang,Jinghua Yu
A facile photoelectrochemical sensor for the determination of hydrogen sulfide (H 2 S) is developed. Photocurrent is generated through the grafting of CdS nanoparticles covalently and in situ onto TiO 2 nanotubes . The surface of TiO 2 nanotubes was modified by a layer of thioglycolic acid (TGA) to introduce thiol groups which can adsorb and immobilize Cd ions . CdS nanoparticles would be formed onto TiO 2 nanotubes after treating with exogenous or endogenous H 2 S. Both the exogenous and H 2 S released from cancer cells were detected based on the photoelectric properties of CdS nanoparticles. And a wide linear range (10 nM–10 6 nM) was achieved with a detection limit of 0.7 nM.
研究领域:
分析化学
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生物医学工程
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癌症研究
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DOI
高影响因子
ACS Applied Nano Materials
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2019
·
IF 0
Panpan Wang,Ling Cao,Yu Chen,Ying Wu,Junwei Di
A novel kind of hydrogen peroxide (H2O2) photoelectrochemical (PEC) sensor was constructed based on Co3O4 and PbS nanomaterial modified indium tin oxide (ITO) photoelectrode. The Co3O4 nanoparticles, as mimic enzyme of catalase (CAT), can catalyze H2O2 to generate oxygen (O2) in suit. Then the electron acceptor of O2 enhances the cathodic photocurrent of the photoelectrode. The PEC sensor exhibited high sensitivity because of the formation of p–p type heterostructure between PbS and Co3O4 semiconductors. The photocurrent enhancement can be used to detect concentration of H2O2. The calibration plot was linear in the range from 5 to 250 μM, and the detection limit was estimated to be 1.2 μM. The results demonstrated the possibility of nanozyme application in PEC biosensors and the substitution of Co3O4 nanozyme for the natural enzyme.
研究领域:
生物传感技术
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纳米材料科学
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分析化学
✓ 已验证
产品关联
DOI
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Yan Wang,Panpan Wang,Ying Wu,Junwei Di
A cathodic “signal-on” method was developed for the photoelectrochemical detection of Hg 2+ ions. Here, ZnS quantum dots (QDs) capped with mercaptoacetic acid was assembled on the surface of an indium tin oxide (ITO) electrode through electrostatic interaction between poly dimethyl diallyl ammonium chloride (PDDA) and the ZnS QDs. HgS was formed on the ZnS surface by ion-exchange in the presence of Hg 2+ ions in solution. The cathodic photocurrent increased under visible light irradiation with a light-emitting diode lamp. This novel strategy exhibits high sensitivity and good selectivity owing to the low background signal and the benefits of ion-exchange technology. The cathodic photocurrent increases linearly with Hg 2+ concentration in the range 1 × 10 −11 –1 × 10 −6 M, providing a detection limit of 2 pM (S/N = 3). This sensor provides a promising new strategy for the detection of trace heavy metal ions.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2015
·
IF 4.097
Hong Dai,Yilin Li,Shupei Zhang,Lingshan Gong,Xiuhua Li,Yanyu Lin
Herein, a signal-amplified photoelectrochemical sensing platform based on interwoven titanate nanotubes and carbon nanohorns conjugates was constructed for folic acid determination. Specifically, titanate nanotubes with reticulation structure were employed as optoelectronic element, which possessed fine photocatalytic activity and enhancement in facilitating fast and long-distance electron transport. Hierarchical-structured carbon nanohorns were introduced as the mainstay to provide as the electron-transport medium to capture and transmit electrons from excited titanate nanotubes to the sensing matrix owing to the prominent conductivity and large surface. Furthermore, the holes from valence band of stimulated titanate nanotubes could transfer to their surface and be consumed by folic acid, thus enhancing the photocurrent response. Hence, under the optimal conditions, a linear relationship between photocurrent increase and logarithm concentration of folic acid was obtained in the wide range from 1 × 10 −10 to 5 × 10 −5 M with a detection limit of (2.5 ± 0.005) × 10 −11 M. The well-designed transducer showed practical advantages, such as universality, simplicity and convenience, opening up a valuable application for other important molecules assessment.
研究领域:
分析化学
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纳米材料科学
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生物医学工程
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 5
·1-12
·
IF 5.3
Zhou Yu,Xiao Wei,Tian Gang,Zhang Suni,Wei Xiaoping,Li Jianping
A novel ternary heterojunction material In 2 O 3 /In 2 S 3 /ZnIn 2 S 4 was synthesized, and a photoelectrochemical sensor was fabricated for the non-invasive test of dopamine (DA) in sweat. In 2 O 3 multihollow microtubules were synthesized and then In 2 S 3 was formed on their surface to construct a type-I heterojunction between In 2 S 3 and In 2 O 3 . ZnIn 2 S 4 was further introduced to form a Z-scheme heterojunction between In 2 S 3 /ZnIn 2 S 4 . Under photoexcitation, the photogenerated holes of In 2 O 3 transferred to the valence band of In 2 S 3 , superimposed with the holes produced by In 2 S 3 , leads to a significantly higher photocatalytic oxidation capacity of In 2 O 3 /In 2 S 3 /ZnIn 2 S 4 ternary composites than that of In 2 O 3 /In 2 S 3 . The Z-scheme heterojunction accelerates the transfer of photogenerated electrons accumulated on the type-I heterojunction. In the presence of DA, it is rapidly oxidized into polydopamine (PDA) by In 2 O 3 /In 2 S 3 , and the benzoquinone groups of PDA compete for the photogenerated electrons to reduce the current in the external circuit, whereby DA determination is achieved. Owing to the combination of type-I and Z-scheme heterojunction, the sensor showed extremely high sensitivity, with a detection limit of 3.94 × 10 −12 mol/L. It is one of the most sensitive methods for DA detection reported and has been applied to the determination of DA in human sweat. Graphical Abstract
研究领域:
材料科学
·
生物医学工程
·
分析化学
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DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 6
·067516
·
IF 3.721
Chen Piaopiao,Xing Yichen,Chen Xiaoxiao,Zheng Shan,Li Yang,Huang Chaobiao
A tetraphenylporphyrin (TPP) doped PFBT polymer quantum dots (TP-Pdots) were synthesized via the reprecipitation method for photoelectrochemical (PEC) aptasensor detection of tetracycline (TC). The TP-Pdots exhibit a superior cathode photocurrent signal. TP-Pdots increase the separation of photo-generated charges, and improve photocurrent conversion efficiency, resulting in enhanced photocurrent response. The aptamer was used as a recognition element and TP-Pdots as a photoactive material to prepare a PEC aptasensor for sensitivity detection of TC. The PEC aptasensor was constructed by immobilizing TP-Pdots on ITO electrode and combining it with aptamer by EDC coupling. After the TC reacts specifically with the aptamer, causing the aptamer to fall off from the TP-Pdots /ITO electrodes surface and the photocurrent intensity restored. This PEC aptamer sensor possesses a wide linear range from 1.0 nmol.l−1 to 1.0 × 10 4 nmol.l−1 with the detection limit of 0.26 nmol.l−1. Meanwhile, the PEC aptasensor was successfully used for the detection of tetracycline in honey.
研究领域:
分析化学
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环境科学
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生物医学
✓ 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）