ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Xiaofan Yang,Yutao Xu,Saraschandra Naraginti,Xueyu Wei
The emerging contaminants removal from the environment has recently been raised concerns due to their presence in higher concentrations. Over usage of emerging contaminant such as sulfamethazine poses serious threat to the aquatic and human health as well. This study deals with rationally structured a novel BiOCl (110)/NrGO/BiVO 4 heterojunction which is used to detoxify sulfamethazine (SMZ) antibiotic efficiently. The synthesised composite was well characterized and the morphological analysis evidenced the formation of heterojunction consisted of nanoplates BiOCl with dominant exposed (110) facets and leaf like BiVO 4 on NrGO layers. Further results revealed that the addition of BiVO 4 and NrGO tremendously increased the photocatalytic degradation efficiency of BiOCl with the rate of 96.9% (k = 0.01783 min −1 ) towards SMZ within 60 min of visible light irradiation. Furthermore, heterojunction energy-band theory was employed to determine the degradation mechanism of SMX in this study. The larger surface area of BiOCl and NrGO layers are believed to be the reason for higher activity which facilitates the excellent charge transfer and improved light absorption . In addition, SMZ degradation products identification was carried out by LC-ESI/MS/MS to determine the pathway of degradation. The toxicity assessment was studied using E. coli as a model microorganism through colony forming unit assay (CFU), and the results indicated a significant reduction in biotoxicity was observed in 60 min of degradation process. Thus, our work gives new methods in developing various materials that effectively treat emerging contaminants from the aqueous environment.
研究领域:
环境科学
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材料科学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Jide Zhang,Jinxia Feng,Yaling Tian,Yiyong Wu,Xia Liu,Quanguo He
An electromical sensor based on α-Fe 2 O 3 @Co 3 O 4 -NRGO composited glass carbon electrode (GCE) was constructed and used for ultrasensitive tyrosine detection. A series of characterization techniques including scanning electron microscopy, X-ray diffraction and electrochemical impedance spectroscopy technique and cyclic voltammetry were employed to investigate the modified electrode. Compared with the bare GCE, the α-Fe 2 O 3 @Co 3 O 4 -NRGO/GCE exhibited a strong current response to tyrosine because of the synergistic effect of ternary composite. Under optimized conditions, the peak currents that responded to tyrosine concentration had a linear relationship from the scope of 0.01 to 10 µM (R 2 = 0.9977) by second derivative linear sweep voltammetry (SDLSV) and 8 nM (S/N = 3) is the detection limit. The sensor showed higher sensitivity, better repeatability, reproducibility and greater sensing stability related advantages over those in previous tyrosine detections. Furthermore, the sensor was successfully applied to trace tyrosine determination in practical samples such as milk and serum.
研究领域:
分析化学
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生物医学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wenliang Feng,Venkata Sai Avvaru,Rudi Ruben Maça,Steven J. Hinder,Miguel Castillo Rodríguez,Vinodkumar Etacheri
Sodium-ion hybrid capacitors (SHCs) have attracted great attention owing to the improved power density and cycling stability in comparison with sodium-ion batteries. Nevertheless, the energy density (<100 Wh·kg–1) is usually limited by low specific capacity anodes (<150 mAh·g–1) and “kinetics mismatch” between the electrodes. Hence, we report a high energy density (153 Wh·kg–1) SHC based on a highly pseudocapacitive interface-engineered 3D-CoO-NrGO anode. This high-performance anode (445 mAh·g–1 @0.025 A·g–1, 135 mAh·g–1 @5.0 A·g–1) consists of CoO (∼6 nm) nanoparticles chemically bonded to the NrGO network through Co–O–C bonds. Exceptional pseudocapacitive charge storage (up to ∼81%) and capacity retention (∼80% after 5000 cycles) are also identified for this SHC. Excellent performance of the 3D-CoO-NrGO anode and SHC is owing to the synergistic effect of the CoO conversion reaction and pseudocapacitive sodium-ion storage induced by numerous Na2O/Co/NrGO nanointerfaces. Co–O–C bonds and the 3D microstructure facilitating efficient strain relaxation and charge-transfer correspondingly are also identified as vital factors accountable for the excellent electrochemical performance. The interface-engineering strategy demonstrated provides opportunities to design high-performance transition metal oxide-based anodes for advanced SHCs.
研究领域:
能源存储
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材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 9
·1-12
·
IF 5.3
Wang Yanping,Guo Min,Li Yuanyuan,Chen Yan,Wei Hong,Mo Xiaohui,Chai Guolin,Du Yongling,Hu Fangdi
A dual-template molecularly imprinted electrochemical sensor was developed for the simultaneous detection of serotonin (5-HT) and glutamate (Glu). First, amino-functionalized reduced graphene oxide (NRGO) was used as the modification material of a GCE to increase its electrical conductivity and specific surface area, using Glu and 5-HT as dual-template molecules and o-phenylenediamine (OPD) with self-polymerization ability as functional monomers. Through self-assembly and electropolymerization, dual-template molecularly imprinted polymers were formed on the electrode. After removing the templates, the specific recognition binding sites were exposed. The amount of NRGO, polymerization parameters, and elution parameters were further optimized to construct a dual-template molecularly imprinted electrochemical sensor, which can specifically recognize double-target molecules Glu and 5-HT. The differential pulse voltammetry (DPV) technique was used to achieve simultaneous detection of Glu and 5-HT based on their distinct electrochemical activities under specific conditions. The sensor showed a good linear relationship for Glu and 5-HT in the range 1 ~ 100 μM, and the detection limits were 0.067 μM and 0.047 μM ( S / N = 3), respectively. The sensor has good reproducibility, repeatability, and selectivity. It was successfully utilized to simultaneously detect Glu and 5-HT in mouse serum, offering a more dependable foundation for objectively diagnosing and early warning of depression. Additionally, the double signal sensing strategy also provides a new approach for the simultaneous detection of both electroactive and non-electroactive substances.
研究领域:
分析化学
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神经生物学
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医学诊断
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产品关联
DOI
PubMed
高影响因子
CARBON
·
2020
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IF 8.821
Venkata Sai Avvaru,Ivan Jimenez Fernandez,Wenliang Feng,Steven J. Hinder,Miguel Castillo Rodríguez,Vinodkumar Etacheri
Although secondary Li-ion batteries are widely used for electrochemical energy storage , low energy (100–300 Wh kg −1 ) and power density (250–400 W kg −1 ) are limiting their applications in several areas including long-range electric vehicles. Herein, we demonstrate high energy (400 Wh kg −1 ) and power density (1 kW kg −1 ) Li-ion batteries (considering the weight of both electrodes) based on extremely pseudocapacitive interface engineered CoO@3D-NRGO hybrid anodes. These values are 2.8 and 2.3-fold higher respectively compared to graphite‖LiNiMnCoO 2 full-cells under similar experimental conditions. Three-dimensional anode architecture presented here composed of ultrafine CoO nanoparticles (∼10 nm) chemically bonded to nitrogen-doped reduced graphene-oxide. This hybrid anode demonstrated excellent pseudocapacitance (∼92%), specific capacity (1429 mAh g −1 @ 25 mA g −1 ), rate performance (906 mAh g −1 @ 5 A g −1 ), and cycling stability (990 mAh g −1 after 7500 cycles @ 5 A g −1 ). Outstanding electrochemical performance of CoO@3D-NRGO‖LiNiMnCoO 2 full-cells is credited to the extreme pseudocapacitance of CoO@3D-NRGO anode resulting from Li 2 O/Co/NRGO nanointerfaces and Co–O–C bonds. The demonstrated strategy of interfacial engineering can also be extended for other environmental friendly/inexpensive transition metal oxide (Fe 2 O 3 , MnO 2 etc.) anodes for high energy/power density and ultra-long-life Li-ion batteries.
研究领域:
材料科学
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能源存储与转换
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Kai Li,Shengjun Xu,Xiaobiao Liu,Huiji Li,Sihui Zhan,Shuanglong Ma,Yan Huang,Shiliang Liu,Xuliang Zhuang
A family of graphene-based activators including reduced graphene oxide (RGO), nitrogen doped reduced graphene oxide (NRGO), zero-valent manganese loaded reduced graphene oxide (Mn-RGO) and zero-valent manganese loaded N-doped reduced graphene oxide (Mn-NRGO) were fabricated to activate peroxymonosulfate (PMS) for bisphenol A (BPA) degradation. A significant synergistic effect between loaded manganese nano-particles (Mn-NPs) and doped N was revealed by comparing the apparent reaction rate constants with about 12.4, 7.6 and 10.5-folds enhancement when compared Mn-NRGO with RGO, NRGO, Mn-RGO, respectively. By integrating the results of chemical scavenger experiment, electron paramagnetic resonance test, galvanic oxidation process, PMS stoichiometric efficiency, linear sweep voltammetry and in-situ Raman spectrum, a predominant outer-sphere catalyst-PMS complexes mediated electron transfer pathway was uncovered. Based on kinetic studies, the specific contribution of synergistic effect was quantified to be at least 70%. The calculated Fermi level advanced by 0.03 eV in Mn-NG compared with that in NG, demonstrating that Mn-NG is more liable to donate electrons to PMS. The E ads and l O-O results pointed out that synergistic effect between Mn-NPs and doped N relied on the intimate affinity between Mn-NPs and HSO 5 – which triggered more uneven distribution of charge on the whole carbon sheets, and more adsorption of HSO 5 – on carbon framework. These newly created adsorption consequently reinforcing the formation of catalyst-PMS complexes and the elevation of mediated electron transfer pathway. Overall, this study firstly provides a comprehensive and definite insight of the synergistic effect between loaded Mn-NPs and doped-N on carbon materials for promoting PMS activation to degrade organics.
研究领域:
环境科学
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材料科学
·
化学工程
·
纳米技术
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 8
·1-17
·
IF 5.3
Liang Jintao,Li Canru,Zhou Yu,Fan Lingling,Liu Lin,Liang Jianlu,Tan Xiaohong,Zhou Zhide,Li Guiyin
Golgi protein 73 (GP73) is highly expressed in hepatocellular carcinoma (HCC) and considered a sensitive serum biomarker for HCC diagnosis. Herein, a label-free electrochemical aptasensor for ultrasensitive detection GP73 based on nitrogen-doped reduced graphene oxide-ferrocene-platinum@palladium nanoparticles (NRGO-Fc-Pt@Pd NPs) was constructed. The NRGO-Fc-Pt@Pd NPs offered excellent conductivity, biocompatibility, and large surface area, serving as both an electrode modifier and a redox probe due to Fc's good electroactivity. GP73 aptamer (GP73 Apt ) was covalently bound with the NRGO-Fc-Pt@Pd NPs to form the signal probe. When GP73 specifically bound to GP73 Apt to form GP73-GP73 Apt complex and fell off from the electrode, it leads to an increased Fc(Fe(II)/Fe(III)) peak current in differential pulse voltammetry (DPV) due to the enhancing of the sensing interface's electroactivity. Under optimized conditions, the label-free electrochemical aptasensor demonstrated a linear relationship with GP73 concentration in the range 1.0 ng/mL-300 ng/mL, with R 2 of 0.99594 and a limit of detection (LOD) of 0.3524 ng/mL. In addition, the aptasensor showed good specificity, reproducibility, and stability. Furthermore, the developed aptasensor was applied to detect the GP73 in actual serum samples with good recoveries (97.85%-107.48%) and relative standard deviations (RSDs) (0.37%–7.85%) via the spiked recovery method. All the results may provide a new approach for HCC clinical detection. Graphical
研究领域:
生物医学工程
·
肿瘤学
·
分析化学
·
纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）