SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Liying Sheng,Zhenjiang Li,Alan Meng,Qinhai Xu
The novel nanocomposite of Ni(OH) 2 nanoparticles over reduced graphene oxide and poly (3,4-ethylenedioxythiophene) hybrid film (Ni(OH) 2 @PEDOT-rGO) have been successfully fabricated via a facile, scalable and easy-to-control electrodeposition method. The characterization results of scanning electron microscope (SEM) and electrochemical techniques show that Ni(OH) 2 nanoparticles with an average particle size about 10 nm are uniformly deposited on PEDOT-rGO hybrid film with rough surface and reveal outstanding performance for detecting glucose. The enzyme-free glucose sensor exhibits an ultrafast response time (< 1 s), a wide linear range (0.002–7.1 mM), a low detection limit (0.6 μM) and a high sensitivity (346 μA mM −1 cm −2 ). Moreover, the sensor also displays superb selectivity, excellent reproducibility and good stability. The outstanding properties of the sensor may be attributed to the synergistic effect of Ni(OH) 2 nanoparticles possessing high electro-catalysis activity and PEDOT-rGO having well conductivity. More importantly, the sensor was successfully used to determine glucose in the real samples. In addition, the mechanism of electrodeposited PEDOT-rGO and glucose oxidase was investigated.
研究领域:
材料科学
·
电化学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Yaoguang Wang,Yulan Wang,Dan Wu,Hongmin Ma,Yong Zhang,Dawei Fan,Xuehui Pang,Bin Du,Qin Wei
In this work, a label-free electrochemical immunosensor was developed for the quantitative detection of carcinoembryonic antigen (CEA). Flower-like Ag/MoS 2 /rGO nanocomposites were employed as the signal amplification platform of the designed immunosensor for the first time. Due to the synergistic effect between molybdenum disulfide (MoS 2 ), reduced graphene oxide (rGO) and Ag nanoparticles (NPs), Ag/MoS 2 /rGO nanocomposites could provide a high sensitivity for the label-free electrochemical immunosensor. The detection mechanism was based on the monitoring of the electrocatalytic current response change towards the reduction of hydrogen peroxide (H 2 O 2 ) when immunoreaction occurred on the surface of the electrode modified with Ag/MoS 2 /rGO nanocomposites. Using amperometric i-t curve to record the electrocatalytic process, the proposed immunosensor achieved an ultrasensitive and specific detection of CEA with a low detection limit of 1.6 fg/mL. Under optimal conditions, the fabricated immunosensor exhibited acceptable reproducibility, selectivity and excellent stability. This designed immunosensor could provide an effective method in the clinical diagnosis of other tumor markers.
研究领域:
生物医学工程
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分析化学
·
肿瘤学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 42
·16091-16098
·
IF 4.052
Lixia Sun,Jianhua Sun,Xiaojun Yang,Shouli Bai,Yongjun Feng,Ruixian Luo,Dianqing Li,Aifan Chen
The low carrier mobility of BiVO4 is a bottleneck that limits its charge transfer in bulk or on the surface. Herein, reduced graphene oxide (rGO) nanosheets as an effective electron mediator were successfully loaded on BiVO4 and NiFe-layered double hydroxides (NiFe-LDHs) were decorated on BiVO4/rGO heterojunctions by two facile electrodeposition methods to construct a triadic photoanode of BiVO4/rGO/NiFe-LDH for improvement of photoelectrochemical (PEC) water splitting efficiency of BiVO4. This photoanode significantly extends the absorption region of visible light, increases the photocurrent density, exhibits an onset potential with a significant cathodic shift, and enhances photon-to-electron conversion efficiency (IPCE) compared with the pristine BiVO4 photoanode. The enhancement of PEC properties benefits from the formation of p–n heterojunctions between rGO and BiVO4 and the use of NiFe-LDH as a cocatalyst for accelerating the kinetics of oxygen evolution from water.
研究领域:
材料科学
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光化学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2024
·Vol. 30
·期 4
·2345-2355
·
IF 2.4
Zhang Yi,Liu Yanmeng,Xu Wanzhen,Huang Weihong,Chen Ting,Ding Hua,Wang Baozhi,Yang Wenming
In recent years, the detection and monitoring of cadmium (Cd(II)) have gained considerable attention due to its widespread applications in various industries, such as electronics, batteries, and coatings, and its classification as a highly hazardous pollutant. This study presents the development of a novel electrochemical sensor based on ion-imprinted polymers (IIPs) and reduced graphene oxide-titanium oxide (rGO@TiO 2 ) for the selective and sensitive detection of Cd(II). Under optimized experimental conditions, the electrochemical sensor displayed a satisfactory linear relationship in the concentration range of 10 −8 to 10 −5 mol L −1 , with a lowest detection limit of 1.2 × 10 −8 mol L −1 . The sensor exhibited excellent repeatability, stability, high sensitivity, and strong selectivity. Finally, the electrochemical sensor was successfully applied to determine trace Cd(II) in practical samples. This novel electrochemical sensor based on IIPs and rGO@TiO 2 holds great potential for practical applications in environmental monitoring and pollution control, providing a promising tool for the accurate and efficient detection of hazardous pollutants like Cd(II).
研究领域:
环境科学
·
分析化学
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材料科学
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电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yidi Wang,Bowen Li,Guanshu Li,Xue Ma,Hongbo Zhang,Yingying Huang,Guowei Wang,Jun Wang,Youtao Song
Z-scheme structure is an effectively construction to improve the photocatalytic activity due to the excellent photo-generated electron-hole pairs separation efficiency. In this paper, the Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO), (Au/rGO)/CdS and modified Z-scheme Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS photocatalysts were prepared by hydrothermal, ultrasonic dispersion, deposition-precipitation and ultrasonic-assisted methods. The prepared samples were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectra (DRS), fourier transform infrared spectra (FT-IR), raman spectra and photoluminescence (PL) spectra. The photocatalytic activity of prepared samples were evaluated via photocatalytic conversion rate of nitrite under ultraviolet-light and simulated solar-light irradiations. Due to the enhanced separation efficiency of electron-hole pairs, the Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS exhibited excellent performance under both ultraviolet-light and simulated solar-light irradiation, reaching 94.59% and 91.25% conversion rates, respectively. Meanwhile, the effects of simulated solar-light irradiation time and corresponding reaction kinetics on photocatalytic conversion of nitrite were studied. Subsequently, the effects of electron and hole scavengers were investigated to further elaborate the possible mechanism. In addition, the study of used times showed that the prepared modified Z-scheme Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS nanocomposites can be effectively recycled without an apparent inactivation on photocatalytic activity. This research may provide a potential way by utilizing solar energy efficiently for converting nitrite and other contaminants released into the environment.
研究领域:
材料科学
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环境科学
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化学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Xike Tian,Xiang Wang,Chu Dai,Yong Li,Chao Yang,Zhaoxin Zhou,Yanxin Wang
Glucose concentration in human body is a significant indicative for diabetes screening, so it is very significant to develop rapid and sensitive methods for glucose detection. Herein, CoSe 2 /reduced graphene oxide (CoSe 2 /rGO) nanohybrids were synthesized via a simple and convenient hydrothermal method, and also their morphologies and compositions were systematically characterized. The CoSe 2 /rGO nanohybrids were found to possess an intrinsic peroxidase-like activity and can effectively catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H 2 O 2 ) accompanied with a blue color change. The catalytic activity of CoSe 2 /rGO nanohybrids is matched with the typical Michaelis–Menten kinetics and highly dependent on reaction time, pH, incubation temperature, and H 2 O 2 concentration. The peroxidase-like CoSe 2 /rGO nanohybrids were successfully applied for the detection of H 2 O 2 and glucose with the detection limit as low as 0.23 μM and 0.553 μM, respectively. Furthermore, some other carbohydrates, such as lactose, sucrose, galactose and fructose have no interferences with the detection of glucose. The detection platforms for glucose developed in the present work not only confirmed that the CoSe 2 /rGO nanohybrids possess intrinsic peroxidase-like activity but also showed great potential applications in varieties of simple, robust, and easy-to-make analytical approaches in the future.
研究领域:
分析化学
·
纳米技术
·
生物传感器
·
糖尿病研究
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 3
·1-10
·
IF 5.705
Li Hongji,Wang Xiaonan,Wang Zirun,Wang Yan,Dai Jiangdong,Gao Lin,Wei Maobin,Yan Yongsheng,Li Chunxiang
A new method is described for the determination of the pesticide λ-cyhalothrin (LC). It combines SERS detection with molecular imprinting and largely improves selectivity. A multilayer surface imprinted nanocomposite was synthesized in two steps on a nanostructure of type SiO 2 @rGO@Ag acting as a substrates. Firstly, the surface of the SiO 2 @rGO@Ag composite was modified with self-polymerized dopamine. Secondly, surface-initiated polymerization was carried out to prepare a molecularly imprinted polymer (MIP) using LC as the template. The use of this SiO 2 @rGO@Ag-MIP allows for excellent SERS based detection and has high selectivity for LC. The Raman intensity and LC concentration present perfect linear relationship between 10 −5 to 10 −9 mol L −1 and the detection limit is 3.8×10 −10 mol L −1 . All the procedures are conducted in aqueous or ethanol solution.
Schematic of a new method for determination of the pesticide λ-cyhalothrin. It combines SERS detection with molecular imprinting and largely improves selectivity. A multilayer surface imprinted nanocomposite was synthesized in two steps on a nanostructure of type SiO 2 @rGO@Ag acting as a substrates.
研究领域:
分析化学
·
纳米技术
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 52
·30439-30447
·
IF 3.049
Yongsheng Wang,Zhenzhen Zhao,Yunlu Zhao,Xiaolin Lan,Weixiang Xu,Li Chen,Dongjie Guo,Zhengkang Duan
The sintering resistance of supported Cu nanoparticle (NP) catalysts is crucial to their practical application in the dehydrogenation of diethanolamine (DEA). In this paper, co-precipitation, hydrothermal synthesis, and sol–gel condensation are used to form a new support material through chemical bonding between graphene oxide and ZrO2. The composite carriers prepared by the three methods are mixed with copper nitrate and ground using a ball mill. A series of Cu/ZrO2-reduced graphene oxide (RGO) composites were prepared by calcination under nitrogen at 450 °C for 3 h and hydrogen reduction at 250 °C for 4 h. The conversion of DEA to iminodiacetic acid (IDA) reached 96% with the Cu/ZrO2-RGO catalyst prepared by hydrothermal synthesis. The conversion rate of DEA is more than 80% following the reuse of the CZG-2 catalyst for twelve cycles. The various physicochemical characterization techniques show that the Cu/ZrO2-RGO layered and wrinkled nanostructures can improve catalytic stability and suppress the sintering of the supported Cu NPs during the catalytic dehydrogenation of diethanolamine. A synergistic effect between the RGO and the Cu nanoparticles is observed. The Cu nanoparticles with RGO have a better dispersibility, and a new nano-environment is created, which is the key to improving the efficiency of diethanolamine dehydrogenation. These new Cu/ZrO2-RGO catalysts show increased durability compared to commercially produced Cu/ZrO2 catalysts and show promise for practical applications involving diethanolamine dehydrogenation.
研究领域:
材料科学
·
化学工程
·
催化
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shiyu Liu,Rongchang Wang,Cuixiang Ma,Dianhai Yang,Duanxin Li,Zbigniew Lewandowski
Oxygen and reactive oxygen species (ROS) produced during algal photosynthesis are important electron acceptors in photosynthetic algal microbial fuel cell (PAMFC) cathodes. In this study, spongy and petaline ZnO– [email protected] carbon felt cathodes were first fabricated through in situ ZnO–NiO growth and further modified with reduced graphene oxide (rGO) via electrodeposition and cyclic voltammetry reduction. The structural and electrochemical properties of the ZnO– [email protected] carbon felt cathodes were characterized, and the ROS adsorption capacity of the cathodes was analyzed via temperature programmed desorption and UV spectrophotometry. The results illustrated that the optimal molar ratio of Zn to Ni was 0.2 for cathode surface modification, and the specific surface areas of spongy and petaline ZnO 0.2 – [email protected] reached 215.26 and 230.88 mg·g −1 , respectively, which were more than 200-fold higher than that of prefabricated carbon felt. The areal capacitance values of spongy and petaline ZnO 0.2 – [email protected] cathodes reached 3033.5 and 6388.92 mC·cm −2 , respectively. The ROS concentrations on the spongy and petaline ZnO 0.2 – [email protected] cathode surfaces reached 52.36 and 64.02 μmol·L −1 , respectively, which were nearly 2-fold higher than that for prefabricated carbon felt cathode. The power densities of PAMFCs using spongy and petaline ZnO 0.2 – [email protected] as cathode electrodes were 20.18 and 31.92 mW·m −2 , respectively. The improvement of electrochemical performance of PAMFCs is partially ascribed to the enhanced ROS adsorption capacity of ZnO– [email protected] cathodes. Therefore, ROS adsorption capacity is recommended as an evaluation indicator for PAMFC cathodes.
研究领域:
环境科学
·
电化学
·
材料科学
·
微生物燃料电池
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xunzhi Deng,Ze Liao,Jing Lu,Haiou Li,Xianxin Zhu,Yilin Liu,Qinyao Li,Danyi Deng,Chao Huang,Zhoufei Luo
The presence of alkylphenolic residues in vegetables could pose a potential food safety risk for humans. The residues of alkylphenols in bean sprouts have not been reported. Magnetic dispersion solid phase extraction (MD-SPE) followed by ultra performance liquid chromatography-tandem mass spectrometry was developed for detecting alkylphenol residues in sprouts. The Fe 3 O 4 @rGO@poly 3-aminophenol composite was first synthesized and used as an effective and regenerate adsorbent for MD-SPE. This method features minimal use of organic reagents, high extraction efficiency, easy recovery via magnetic separation, and the reusability of the adsorbent. The magnetic composite was characterized using X-ray powder diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy. For optimization of the extraction process, the Plackett-Burman factorial design was employed to to fine-tune multiple parameters of MD-SPE. Additionally, the sensitivity of UPLC-MS/MS enabled the precise quantification of alkylphenols in the sprout samples. This analysis yielded high linearities (R 2 > 0.9989) and recoveries (90.4 %–108.5 %) at three different spiked levels. a minimal matrix effect (7.5 %–12.4 %), impressive limits of detection (0.89–13.62 pg/mL), and reliable reproducibility (intra-day: 2.0 %–13.5 %; inter-day: 0.7 %–11.6 %) were obtained. Thus, a new method was successfully employed for analyzing alkylphenolic residues in vegetables samples, making it a valuable tool for ensuring food safety.
研究领域:
食品安全
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Siyuan Zhang,Zisen Li,Jinlei Tao,Jian Jiao
Optimizing the composition and structure of polymers and carbon nanomaterials to obtain composite films with excellent mechanical and electromagnetic wave (EMW) properties is an excellent solution for exploring EMW absorbing materials. In this work, a flexible composite film with a regular three-dimensional network structure was designed and prepared. The modified rGO@MWCNTs/Fe 3 O 4 -PVA composite nanofilm with optimized composition and structure has a multi-component heterogeneous interface, three-dimensional network structure. The composite film has high EMW absorption performance, excellent flexibility, mechanical strength and stability, and can be used in a wide range of application scenarios. At a thickness of 2.8 mm, the effective absorption bandwidth ( f E ) reaches 3.72 GHz, the minimum reflection loss (RL min ) is -48.99 dB, and the tensile stress reaches 32 MPa. This work realizes the regulation of the mechanical properties and EMW absorbing properties of the composite film, and provides an efficient and stable flexible composite EMW absorbing material.
研究领域:
材料科学
·
电磁工程
·
纳米技术
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Chenghong Sun,Enze Zhu,Chaoyang Shi,Juan Yu,Shubiao Yin,Chunxia Liu,Xiaoying Cui,Weiping Liu,Mingli Xu
The vigorous development of efficient cathode-side oxygen reduction reaction (ORR) catalysts is one of the keys to the practical application of fuel cells and Zn-air batteries (ZABs). Herein, a facile and green photochemical method is developed to synthesize pure-phase Mn 3 O 4 nanoparticles , which are uniformly anchored on nitrogen-doped reduced graphene oxide (N-rGO), followed by simple one-step annealing to highly catalytical active and stable MnO/N-rGO. The resultant MnO/N-rGO exhibits exciting ORR performance in alkaline media. Particularly, both GDE (gas diffusion electrode) half-cell and ZABs assembled from MnO/N-rGO have excellent overall performance and outstanding long-term durability, obviously better than Pt/C-based GDE half-cell and Pt/C + RuO 2 -based ZABs, respectively. It is mainly attributed to the synergistic effect between MnO nanoparticles and N-rGO support, which significantly increases the active sites and facilitates 4-electron transfer. This research paves a way for the green photochemical synthesis of transition metal oxide ORR catalysts at room temperature.
研究领域:
材料科学
·
电化学
·
能源存储
·
催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）