Analytical Methods
·
2024
·Vol. 16
·期 9
·1330-1340
·
IF 2.7
Cuizhong Zhang,Qiang Wang,Chuanze Zhong,Ye Yang,Xuexue Liang,Peican Chen,Liya Zhou
Designing a simple and sensitive photoelectrochemical (PEC) sensor is crucial to addressing the limitations of routine analytical methods. The sensitivity of the PEC sensor, however, relies on the photoelectric material used. In this manuscript, composites of MoS2/rGO (MG) with a large area and layered structure are prepared by simple steps. This material exhibits sensitivity to visible light and demonstrates outstanding photoelectric conversion performance. The constructed PEC aptasensor using this material to detect aflatoxin B1 (AFB1) shows significantly higher sensitivity and stability compared to similar sensors. This may be attributed to the presence of surface defects in MoS2, which provide more active sites for photocatalysis. Additionally, graphene oxide (GO) is reduced to rGO by thiourea and forms a heterojunction with MoS2, enhancing charge carrier separation and interfacial electron transfer. Our research has revealed that the photocurrent intensity of the aptamer electrode decreases with an increase in AFB1 concentration, resulting in a “signal-off” PEC aptasensor. The detection limit of this aptasensor is 2.18 pg mL−1, with a linear range of 0.001 to 100 ng mL−1. This result will also provide a reference for the study of other mycotoxins in food.
研究领域:
食品科学
·
生物传感
·
光电化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Xiaoju Wang,Shanshan Hu,Haitao Mao,Xueyu Wei,Saraschandra Naraginti
In the recent past, the development of efficient materials for degradation and detoxification of antibiotics has gained more attention in wastewater treatment process . As a visible light active material AgVO 3 has attracted much concern in environmental remediation. To improve its efficiency and stability, a novel heterojunction was prepared by combining AgVO 3 with rGO and BiVO 4 through a hydrothermal method. The prepared AgVO 3 /rGO/BiVO 4 composite was further utilized for effective detoxification of Norfloxacin (NFC) antibiotic. The morphological analysis revealed the clear rod shaped AgVO 3 and leaf like BiVO 4 that are evenly distributed on reduced graphene oxide (rGO) layers. The visible light absorbance and the catalytic activity of AgVO 3 /rGO/BiVO 4 was dramatically improved compared to pure AgVO 3 and BiVO 4 . From the results it showed that the degradation efficiency of AgVO 3 /rGO/BiVO 4 (∼96.1%, k = 0.01782 min −1 ) was 2.5 times higher than pure AgVO 3 and 3.4 times higher than the pure BiVO 4 respectively towards NFC after 90 min. The higher efficiency could be attributed to the heterojunction formation and faster charge separation. The radical trapping experiments results indicated that the •OH, and O 2 •− are the main species responsible for degradation. The degradation products of NFC were analysed through ESI-LC/MS and pathway was proposed. Furthermore, the toxicity assessment of pure NFC and its degradation products was studied using E. coli as the model bacteria through colony forming unit assay and the results indicated the efficient detoxification was attained during the degradation process. Thus, our study provides new insight into detoxification of antibiotics using AgVO 3 based composites
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2024
·
IF 2.7
Qiao Xinxin,Bian Ruihan,Li Shu,Zhu Jialei,Wang Fuqin,Liu Chang
In the paper, a high-performance electrode was reported for the determination of uric acid (UA) and dopamine (DA) by loading nanocomposites Fe 2 O 3 /poly-neutral red (PNR)/partially reduced graphene oxide (rGO) on glassy carbon electrode (GCE). The nanocomposites Fe 2 O 3 /PNR/rGO were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectrometer (FTIR), and electrochemical impedance spectroscopy (EIS). Under the optimized condition, the peak currents of UA and DA showed good linear relationships with their concentrations in the range of 1 × 10 –6 to 1 × 10 –3 mol L −1 and 3 × 10 –7 to 9 × 10 –5 mol L −1 , respectively. The recovery rates were 93.0–102.0% and 99.2–104.6% for detecting DA from medical injections and human specimens, including urine and serum, respectively, 95.5–105.0% for UA from urine and serum samples. Obviously, this Fe 2 O 3 /PNR/rGO/GCE is expected to be used in production quality control and clinical test. Graphical abstract
研究领域:
分析化学
·
生物医学工程
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DOI
高影响因子
Advanced Materials Interfaces
·
2019
·Vol. 7
·期 1
·1901446
·
IF 4.713
Zhenming Chu,Weicheng Jiao,Yifan Huang,Guomin Ding,Xue Zhong,Meiling Yan,Yongting Zheng,Rongguo Wang
Icing accretion on the surface of an aircraft not only increases the weight but also causes changes in the surface shape, so there is an urgent need for anti-icing/deicing without shutdown. Here, a graphene-based film with light weight, super-hydrophobicity, high electric heat, and durability, which has both anti-icing properties and electrothermal deicing capability, is proposed. The film is prepared with 1 H ,1 H ,2 H ,2 H -perfluorodecyltrichlorosilane (FDTS)-modified SiO 2 /rGO wrinkles, and it has a micro-nanoscale hierarchical structure. Moreover, the superhydrophobic properties of the film can be controlled by adjusting the wrinkle size. Because of its good water repellency, the film can prevent and delay the freezing of water droplets at low temperatures. At −10 °C, compared to a smooth rGO film, the icing time of 10 µL supercooled water droplet on the micro-nanoscale hierarchical structured film can be delayed by ≈8.3 times, and the ice adhension decreases greatly. In addition, the film exhibits high-efficiency electrothermal properties. At −10 °C, under a low voltage of 15 V, the film can be heated rapidly to achieve rapid deicing and defrosting. The graphene-based micro-nanoscale hierarchical structure shows great potential in the field of sky anti-icing and real-time deicing.
研究领域:
材料科学
·
航空工程
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产品关联
DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 23
·6968-6974
·
IF 4.019
Jianqiao Liu,Li Quan,Xuelian Yu,Lin Wang
In this work, a sandwich-type electrochemical immunosensor for the detection of procalcitonin (PCT) is constructed layer-by-layer with a novel label based on MoO3/Au@rGO nanocomposites. The high surface area and electroconductivity of graphene contributes to the transfer of electrons. Besides, the introduction of Au modulates the morphology of the MoO3@rGO nanocomposites from hexagonal prisms to agglomerated particles. Compared to rGO, Au@rGO and MoO3@rGO, the synergistic effect of MoO3/Au@rGO nanocomposites leads to the highest electrocatalytic activity towards H2O2 reduction. The electrochemical immunosensor exhibits a wide working range from 0.01 pg mL−1 to 10 ng mL−1 and a detection limit of 0.002 pg mL−1 at a signal-to-noise ratio of 3. Additionally, we also obtain excellent sensing performance for the immunosensor, including excellent selectivity, good reproducibility and stability. This work will give insight into the application of the nanocomposites based on noble metals combined with transition metal oxides in the fields of electroanalytical chemistry and biosensors.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
ANALYST
·
2020
·Vol. 145
·期 6
·2191-2196
·
IF 3.978
Fen-Ying Kong,Lei Yao,Xin-Yang Lu,Heng-Ye Li,Zhong-Xia Wang,Hai-Lin Fang,Wei Wang
The Au–Hg amalgam anchored on the surface of reduced graphene oxide nanosheets (Au–Hg/rGO) has been synthesized successfully and characterized by various techniques such as transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The Au–Hg/rGO nanocomposites were found to possess excellent peroxidase-like catalytic activity and can quickly catalyze the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue oxTMB in the presence of H2O2. The obvious color change offered accurate determination of the H2O2 concentration by recording the absorbance at 652 nm using a UV-vis spectrophotometer. The linear response range for H2O2 was from 5 μM to 100 μM and the detection limit was 3.25 μM (S/N = 3). Furthermore, a kinetic study indicated that the catalytic behavior of Au–Hg/rGO nanocomposites followed the typical Michaelis–Menten theory and Au–Hg/rGO nanocomposites showed good affinity for H2O2. We envision that the simple and sensitive colorimetric detection system holds great promising applications in clinical diagnostics and food and environment monitoring.
研究领域:
生物化学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sensor Letters
·
2016
·Vol. 14
·期 11
·1067-1073
·
IF 0
Wu Wenwen,Wang Sui
In this work, we reported a luminol electrochemiluminescence (ECL) sensor using a composite material compounded by ZnO nanoparticles and reduced graphene oxide (ZnO/RGO) as electrode membrane and in situ generated hydrogen peroxide as coreactant. The composite material was characterized
by fourier transform infrared spectroscopy analysis (FTIR) and X-Ray powder diffraction (XRD). Then this ZnO/RGO modified electrode was used to determine tetracaine hydrochloride (TA· HCl). Results show that the inhibition of ECL intensity increased with logarithm of TA · HCl
concentration within a linear range from 10–4
μg/mL to 10–2
μg/mL and the detection limit (S/N) was 3.3 × 10–5
μg/mL. In addition, the recoveries of real samples were 85.0%–104.0% (urine),
95.0%–127.4% (serum) and 87.0%–104.6% (raw material drug) respectively, demonstrating an acceptable reproducibility of this method.
研究领域:
分析化学
·
药物分析
✓ 已验证
DOI
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zeyu Wu,Linghao Zhao,Yangkun Sun,Yufeng Zhang,Yuerong Wang,Min Zhang,Hongyang Zhang,Fanghong Ning,Ping Hu
Hydrogen peroxide (H 2 O 2 ), a type of reactive oxygen species (ROS) produced by cells, plays a significant role in various physiological processes. Its abnormal concentrations in human body are closely associated with cellular damage as well as a variety of major diseases. Consequently, sensitive and accurate detection of cellular H 2 O 2 concentration is of great significance in evaluating the degree of intracellular oxidative stress in human cells. In this study, a novel heterogeneous nanomaterial, rGO@PDA@MXene-Au@COF, was designed for electrochemical-colorimetric dual-mode detection of intracellular H 2 O 2 , which enhances both peroxidase and electrochemical activities, achieving lower detection limits and broader linear ranges. ESR spectroscopy, EIS resistance analysis and computational simulation were employed to verify the mechanism of the activity enhancement, and the detection conditions were optimized. The methods were subsequently applied to the determination of H 2 O 2 in cells, yielding results of 1.69 × 10 −14 M H 2 O 2 /cell and 1.59 × 10 −14 M H 2 O 2 /cell for electrochemical and colorimetric detection of MCF-7 cells, and 1.67 × 10 −14 M H 2 O 2 /cell and 1.58 × 10 −14 M H 2 O 2 /cell of Hela cells, respectively. These results demonstrated high sensitivity and anti-interference capabilities, enabling quantitative detection of H 2 O 2 in complex cellular environments. Furthermore, the similarity in results between the two methods confirms their mutual accuracy and reliability. This work provided a novel approach for designing multifunctional nanomaterials and detecting H 2 O 2 in cells.
研究领域:
纳米技术
·
电化学
·
生物传感器
·
分析化学
·
细胞生物学
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产品关联
DOI
高影响因子
IONICS
·
2019
·Vol. 25
·期 10
·4739-4749
·
IF 2.289
Han Tao,Han Jia-Jun,Ma Hui,Zhang Ning,Sun Dan-Dan
Graphene oxide (GO) was synthesized by the modified Hummers method and then reduced with NaBH 4 to form RGO with a regular layered structure. The graphene oxide is benzenesulfonated to obtain a functionalized graphene material (RGO-BS). The benzenesulfonated polyaniline/RGO composite (PANI/RGO-BS) was prepared by adsorption double oxidation method using RGO as template. Some physical characterization methods (X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy) were used to analyze the morphology and crystallinity of the composite. The electrochemical properties were characterized by cyclic voltammetry, impedance spectroscopy, galvanostatic charge/discharge, and rate capability. The initial discharge specific capacities of oxidized PANI/RGO-BS and reduced PANI/RGO-BS were 165.4 and 176 mAh/g. After 100 cycles, the capacity retention rates were 92.6% and 96%, the coulombic efficiency of the battery is close to 100%. These results indicate functionalized composite has exciting potentials for the cathode material of lithium-ion battery.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Zuxing Zhang,Liying Zhai,Mingqing Li,Jiahui Wu,Li Li
The obtained RGO/BiVO 4 composites were first applied to tetracycline hydrochloride (TCH) photoelectrochemical (PEC) monitoring platform. The RGO/BiVO 4 nanocomposites exhibited higher PEC activity, which benefited from the accelerated electron transfer induced by loading of RGO. The RGO/BiVO 4 electrode exhibited a linear response in the concentration range of 0.1 μM – 1 mM with a sensitivity of 45 μA mM cm −2 and a detection limit of 0.922 μM. Furthermore, the designed RGO/BiVO 4 PEC sensor exhibits good reproducibility, long-term stability and selectivity. In summary, the designed materials have outstanding electrochemical properties, which provide ideal candidates for PEC detection of TCH.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 6
·2702-2714
·
IF 6.482
Arnauld Robert Tapa,Wanchun Xiang,Abdelaal. S. A. Ahmed,Senwei Wu,Bin Li,Qiufen Liu,Chawuch Machar Jacob Chuti,Xiujian Zhao
In this work, we employ a simple hydrothermal method to synthesize a metal–organic framework (MOF) derived selenide from a reduced graphene oxide (rGO)/structured zeolitic imidazolate framework (ZIF). The resulting MOF-derived selenide (rGO/ZnSe/CoSe2) consists of porous nanowires encapsulated in a carbon matrix and having a high surface area (169.30 m2 g−1). This porous rGO/ZnSe/CoSe2 is combined with polystyrene sulfonate-doped poly(3,4-ethylenedioxythiophene) (PEDOT:PSS) for use as a CE for DSSCs. CEs based on different weight percentages (1, 3, and 5 wt%) of rGO/ZnSe/CoSe2 powder in PEDOT:PSS solution are compared with the commonly used platinum (Pt) based CE. The rGO/ZnSe/CoSe2–PEDOT:PSS composite benefits from the synergistic effects between porous rGO/ZnSe/CoSe2 having a high surface area and PEDOT:PSS which holds superior conductivity and strong binding capability with a fluorine-doped tin oxide (FTO) glass substrate. Therefore, the 3 wt% rGO/ZnSe/CoSe2–PEDOT:PSS composite based CE achieved a good stability and superior electrocatalytic activity compared to Pt CE. Furthermore, DSSCs based on a 3 wt% rGO/ZnSe/CoSe2–PEDOT:PSS composite CE achieved a higher power conversion efficiency (PCE) of 8.60%, compared to the PCE of the Pt CE based DSSC (7.14%) prepared under similar conditions. This work has revealed a new approach to prepare MOF-derived selenide based CEs with high electrocatalytic activity without any calcination. In addition, we demonstrated that the low-cost 3 wt% rGO/ZnSe/CoSe2–PEDOT:PSS composite CE is an excellent candidate to replace Pt CE in DSSCs.
研究领域:
材料科学
·
能源科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Energy & Environmental Materials
·
2023
·Vol. 7
·期 2
·e12585
·
IF 15
Dongdong Zhang,Qiliang Wei,Haili Huang,Lan Jiang,Jie Teng,Ruizhi Yu,Qing Zhang,Shengxing Liu,Lin Wang,Weiyou Yang
Crystalline γ-Ga 2 O 3 @rGO core–shell nanostructures are synthesized in gram scale, which are accomplished by a facile sonochemical strategy under ambient condition. They are composed of uniform γ-Ga 2 O 3 nanospheres encapsulated by reduced graphene oxide (rGO) nanolayers, and their formation is mainly attributed to the existed opposite zeta potential between the Ga 2 O 3 and rGO. The as-constructed lithium-ion batteries (LIBs) based on as-fabricated γ-Ga 2 O 3 @rGO nanostructures deliver an initial discharge capacity of 1000 mAh g −1 at 100 mA g −1 and reversible capacity of 600 mAh g −1 under 500 mA g −1 after 1000 cycles, respectively, which are remarkably higher than those of pristine γ-Ga 2 O 3 with a much reduced lifetime of 100 cycles and much lower capacity. Ex situ XRD and XPS analyses demonstrate that the reversible LIBs storage is dominant by a conversion reaction and alloying mechanism, where the discharged product of liquid metal Ga exhibits self-healing ability, thus preventing the destroy of electrodes. Additionally, the rGO shell could act robustly as conductive network of the electrode for significantly improved conductivity, endowing the efficient Li storage behaviors. This work might provide some insight on mass production of advanced electrode materials under mild condition for energy storage and conversion applications.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）