JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Yongheng Xiong,Yuting Li,Shipeng Wan,Yang Yu,Shule Zhang,Qin Zhong
Electrochemical reduction of NO to NH 3 (NORR) is an attractive approach to mildly realize NO removal and valuable NH 3 production. The electrolyte, as function as the NO absorbent, is crucial to apply electrochemical technology in practical de-NO engineering. In this paper, the ferrous chelate acted as the electrolyte for effective NO absorption in NORR based on the Brown-ring reaction. The rGO and Au/rGO catalysts served as cathodes to realize ferrous regeneration for continuous NO reduction. The results revealed that ferric chelate could be fully reduced at lower onset potential on rGO electrode. The Au/rGO catalyst exhibited excellent average yield and selectivity for NH 3 at − 0.1 V and pH = 6.32, (14.6 μmol* h −1 * cm −2 and 65.2%, respectively). The Faradaic Efficiency of NH 3 could reach 98.3% at pH = 1.0. This work provides a valuable reference for effective NO adsorption and sustainable NO-to-NH 3 conversion.
研究领域:
环境科学
·
电化学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Peikai Luo,Zhibin Mao,Guangqi Xu,Ke Sun,Yu Cao,Pei Li,Wenwen Liu
In this study, a PWF/rGO@PVA photocatalytic membrane with high stability and reusability was successfully prepared by employing a blending-coating method. Through the innovative introduction of high thermal conductivity rGO, the membrane achieved enhanced photothermal conversion, which facilitates molecular diffusion and reduces reaction energy barriers. Simultaneously, rGO acts as an electron bridge to promote charge separation and suppress carrier recombination. With an optimal photocatalyst content of 5 wt%, the PWF/rGO@PVA membrane exhibited excellent degradation rates of 0.0112 min⁻¹ and 0.0101 min⁻¹ under UV and visible light respectively, and maintained over 70% removal efficiency after five cycles. Selective laser texturing was then applied to the membrane surface, achieving degradation rates of 96.7% and 93.6% under UV and visible light respectively, and maintained over 90% removal efficiency after five cycles. On one hand, the created periodic microstructures increased specific surface area which provided additional adsorption sites and reaction interfaces and significantly enhanced the anti-reflective properties of the membrane surface. On the other hand, the laser texturing process disrupts the hydrogen bonding network of PVA, thereby suppressing warpage deformation during photocatalytic cycling and improving structural stability. Finally, the dynamic water experiments verified that at a flow rate of 1.0 mL/min, the photocatalytic membrane retained over 80% degradation efficiency and maintained high photocatalytic stability in dynamic water environments with varying pH and the presence of inorganic anions.
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产品关联
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-6
·
IF 4.011
Khan M. Z. H.,Daizy M.,Tarafder C.,Liu X.
In this work, we have successfully synthesized core-shell structured Au-PDA@SiO 2 nanospheres and decorated on reduced graphene oxide (rGO) modified glassy carbon electrode for the electrochemical detection of cefotaxime. The one-pot hydrothermal method was used to synthesis core-shell nanostructures by loading Au nanoparticles on polydopamine (PDA) coated SiO 2 nanospheres. The as-prepared Au-PDA@SiO 2 nanospheres were used to fabricate electrochemically reduced graphene oxide (rGO) modified glassy carbon electrode (Au-PDA@SiO 2 /rGO/GCE) for electrochemical determination of cefotaxime. Scanning electron microscopy, powder x-ray diffraction, transmission electron microscopy, and Fourier-transform infrared spectroscopy were used to confirm the structure and morphology of the as-prepared nanospheres. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were performed for electrochemical characterizations different modified electrodes. It was revealed that the nanocomposite modified electrodes exhibited excellent electrochemical performances for electrooxidation of target analytes and could achieve ultra-sensitive detections. A linear relationship was observed between peak currents and concentrations in the ranges of 1.0 × 10 −9 to 5.0 × 10 −8 M ( R 2 = 0.9877), and 1.0 × 10 −7 to 5.0 × 10 −6 M ( R 2 = 0.9821) for cefotaxime with a detection limit (S/N = 3) of 1.0 × 10 −10 M. It can be deduced that the proposed sensor is suitable for the sensitive detection of cefotaxime in pharmaceutical samples.
研究领域:
分析化学
·
电化学传感器
·
材料科学
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DOI
高影响因子
IONICS
·
2016
·Vol. 22
·期 11
·2225-2233
·
IF 2.119
Lu Juanjuan,Liu Yuelin,Liu Xinhe,Lu Xiaoquan,Liu Xiuhui
In this article, we constructed an electrochemical sensor for highly sensitive determination of β-nicotinamide adenine dinucleotide (NADH) using the poly(diallyldimethylammonium chloride)-functionalized reduced graphene oxide nanocomposite modified electrode (PDDA-rGO/GCE). The nanocomposite was characterized by transmission electron microscopy, Fourier transform-infrared spectrometry, ultraviolet-visible absorption spectrometry, cyclic voltammetry, and electrochemical impedance spectroscopy. The experimental results demonstrated that the fabricated sensor exhibited excellent electrocatalytic activity on the oxidation of NADH with a decreased about 200 mV in overpotential and 5.0-fold increment in the oxidation peak current compared to a bare GCE. Applying cyclic voltammetry, a wide linear range from 1.0 × 10 −7 to 2.9 × 10 −3 M with low limit of detection (LOD) of 3.4 × 10 −8 M and high sensitivity of 463.3 μA mM −1 cm −2 were obtained, which was superior to other NADH electrochemical sensors reported previously. Furthermore, the fabricated NADH sensor possessed excellent selectivity, reproducibility, and stability. The oxidation mechanism of NADH at the PDDA-rGO/GCE was also discussed in detail.
A simple NADH sensing platform based on PDDA-rGO composite is constructed, which exhibits an ultra-low detection limit ( 3.4×10-8 M) towards the oxidation of NADH, and the electrochemical reaction mechanism of NADH is discussed in detail.
研究领域:
生物电化学
·
生物传感器
·
纳米生物技术
·
分子诊断
·
转化医学
·
电分析化学
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DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 28
·14441-14446
·
IF 3.708
Hui Zhang,Anjian Xie,Cuiping Wang,Haisheng Wang,Yuhua Shen,Xingyou Tian
As a result of their lightweight properties and high dielectric loss, graphene and their composites have attracted great attention for potential applications in wave absorption. Herein, we report room temperature conditions for the synthesis of a 3D composite hydrogel composed of reduced graphene oxide nanosheets and Fe3O4 nanoparticles (RGO–Fe3O4). The experimental results show that the composite has an interconnected 3D porous network with micrometer-sized pores, and that the Fe3O4 nanoparticles with a small size of about 5–10 nm are uniformly dispersed onto the thin graphene nanosheets. The as-prepared RGO–Fe3O4 composite hydrogel shows excellent microwave absorbability compared with previously reported nanocomposites based on graphene and Fe3O4. The obtained composite with a coating layer thickness of only 2.5 mm exhibits a maximum absorption of −47.9 dB at 10.1 GHz. In particular, the product with a coating layer thickness of only 2.0 mm shows a bandwidth of 5.3 GHz (from frequency of 11.3–16.6 GHz) corresponding to reflection loss at −10 dB (90% absorption). Additionally, the fabrication method is simple, low cost and easily done on a large scale. This further confirms that nanoscale Fe3O4 particles on graphene networks give the composite hydrogel the ability to realize practical applications for wave absorption.
研究领域:
材料科学
·
纳米技术
·
电磁波吸收
·
复合材料
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Yifei Wang,Yan Liu,Yu Yu,Haiou Huang
In this study, flake-like reduced graphene oxide (rGO) was integrated with filamentous carbon nanotube (CNT) in different ways to prepare CNT-rGO composite membranes with three distinctive types of nanostructures . These membranes were further assessed at bench scale to determine the relationship between nanocomposite structure and membrane performance , including clean water permeability, removal efficiencies for pharmaceuticals and personal care products (PPCP), and resistance to organic fouling. Among the three types of prepared membranes, the membrane with CNT evenly distributed in the rGO layer outperformed other membranes in terms of PPCP removal efficiencies (76–100%), clean water permeability (4454 L m −2 h −1 bar −1 ), and antifouling property. Further membrane characterization using scanning electron microscopy and other analytical techniques revealed that the outstanding performance of this membrane resulted from the open CNT-rGO nanostructure that was beneficial for water permeation, PPCP adsorption, and membrane fouling reduction. Overall, these results demonstrated that, under the condition of similar compositions and surface properties, the nanostructures of CNT-rGO membranes significantly influenced membrane performance. Therefore, it is feasible to manipulate the nanostructures of CNT-rGO composite membranes to achieve high clean membrane permeability, outstanding antifouling property, and efficient contaminant removal .
研究领域:
材料科学
·
环境工程
·
纳米技术
·
水处理技术
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DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
Yang Du,Yunxiu Wang,Zhuofan Cao,Jie Ding,Zifeng Guo,Hengjia Shao,Yang Li,Juyang Yan,Renqing Sun,Xintao Zhang,Tao Sun,Fuyi Jiang,Caifu Dong
Metal sulfides with high capacity, morphology-controlled, and facile synthesis are considered as potential anodes for Na-ion batteries. However, the conductivity and structural stability of electrode materials are still hampered by its inherent low conductivity and obvious volume changes during cycling. Herein, Cu 7.2 S 4 nanoparticles anchored on reduced graphene oxide (Cu 7.2 S 4 /RGO) are successfully prepared by solvothermal and thermal processes. The product, Cu 7.2 S 4 /RGO-10, not only features optimized the amount of RGO , but also delivers a large reversible capacity (314.4 mAh g −1 at 2 A g −1 ), good cycling stability (with a capacity fading of 0.11% per cycle from 2nd to 400th) and excellent rate capability (209 mAh g −1 at a high current density of 20 A g −1 ), making it the promising anode material for SIBs . Kinetics analysis clarifies that the high ion diffusion coefficient and the pseudo-capacitance contribution are important reasons for the superior performance. As expected, sodium-ion full cells (Cu 7.2 S 4 /RGO//Na 3 V 2 (PO 4 ) 3 ) also show good cycling stability.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Mingyue Piao,Xue Peng,Huishi Du,Hongxue Du,Wei Zhang,Yuwei Sun,Honghui Teng
Cadmium (Cd) emissions have a negative impact on both human health and the environment. Although nano zero-valent iron (nZVI) offers a lot of potential for water pollution treatment, it has been constrained by its instability and ease of aggregation. For the elimination of Cd(II) from aqueous solution, nZVI/MCM supported nZVI (nZVI/MCM-41/rGO) was designed to improve its dispersion and stability. It had a rough, porous structure with apparent Fe (0) crystallinity and slight rGO crystallinity. On the surface of nZVI/MCM-41/rGO, several oxygen-containing groups were detected. The specific surface area was 15.94 cm 2 /g, and the pore diameter was concentrated at 23.82 nm. The best performance was occurred at pH 6 with an adsorbent dosage of 2 g/L, and a maximum adsorption capacity of 31 mg/g was achieved after 600 min. Cd(II) removal process was well fitted with second-order kinetic, Langmuir and Freundlich isotherm. The thermodynamic parameter was also analyzed and proved that it was an endothermic (ΔH° > 0) and spontaneous (ΔG° < 0) progress. During adsorption, the crystal type and functional groups of nZVI/MCM-41/rGO did not change, but Fe (0) was oxidized.
研究领域:
环境科学
·
材料科学
·
水处理
·
纳米技术
·
吸附技术
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2026
·
IF 5.2
Qinqin Qian,Haocheng He,Songyin Fu,Jia Xu,Ho-Pui Ho,Shuwen Zeng,Tao Jiang,Sheqin Lv,Chenjie Gu
The efficient and sensitive monitoring of the interleukin-6 (IL-6) is crucial for the clinical tracking and diagnosis of chronic obstructive pulmonary disease (COPD). Herein, a novel surface-enhanced Raman scattering substrate (RGO@MoS 2 /Ag NPs), comprising an efficient charge-transfer and adsorption layer of reduced graphene oxide (GO) encapsulated in molybdenum disulfide (MoS 2 ) and an electromagnetic enhancement layer of Ag nanoparticles, was developed for the highly sensitive, label-free detection of IL-6. Experimentally, a precursor film consisting of (NH 4 ) 2 MoS 4 and GO was first deposited onto a rough g -C 3 N 4 substrate via spin-coating process. Subsequently, the above precursor film was subjected to a two-step high-temperature annealing process for preparing the RGO@MoS 2 charge transfer layer. Finally, Ag NPs were sputtered onto the RGO@MoS 2 film to induce the localized surface plasmons for the further enhancement of the SERS performance. Leveraging the high specific surface area and exceptional charge transfer properties of RGO@MoS 2 , together with the high-density “hot spots” generated by surface Ag NPs, the fabricated SERS substrate exhibited remarkable electromagnetic and chemical enhancement effects. By using the rhodamine 6G (R6G) as the Raman reporter, it was determined that the lowest detection limit could be as low as 10 −9 M on the optimal SERS substrate, with an enhancement factor of 2.2 × 10 9 . Meanwhile, the substrate also exhibited good uniformity, with a relative standard deviation of 9.84%. Finally, the prepared SERS substrate was used to detect the IL-6, it showed good linear response in the range of 5.0-1000 pg/mL, with a detection limit as low as 0.41 pg/mL.
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Z.P. Liu,J.N. Ren,T.N. Man,S.B. Gu,Y.F. Li,J.Y. Xu,M.W. Zhu,S.V. Panin,S.W. Lu
Conventional honeycomb microwave-absorbing structures cannot simultaneously achieve superhydrophobic protection and electromagnetic impedance matching under harsh service conditions such as high humidity, salt spray, and icing. To address this, the present work proposes a surface-energy-driven self-assembly strategy. RGO/SiO₂ nanostructures are introduced into a phenolic resin matrix to form a gradient architecture, which is then applied to a functionalized aramid paper honeycomb. The self-assembled gradient structure creates a low-surface-energy micro/nanostructured rough interface on the outer surface, endowing the coating with excellent superhydrophobic and anti-icing properties. Meanwhile, it enhances the incidence and dissipation of electromagnetic waves through the synergistic effects of outer-layer impedance buffering, intermediate loss enhancement, and multiple interfacial polarization. The results show that the 3FCPR coating exhibits a water contact angle of 153° and an ice delay time of approximately 8 min 30 s. In terms of electromagnetic performance, the honeycomb structure achieves an effective absorption bandwidth (EAB) of 10.6 GHz with a minimum reflection loss of −31 dB. By adopting a vertical gradient design, the EAB of the functionalized aramid honeycomb (FAH) structure is further broadened to 14.5 GHz, covering the C, X, and Ku bands. The surface-energy-driven self-assembly strategy enables the synergistic integration of superhydrophobicity, anti-icing capability, and microwave absorption while preserving the mechanical properties of the honeycomb itself. This work provides a new route for the multifunctional integrated design of lightweight honeycomb microwave absorption materials.
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Yujie Han,Xujie Su,Lifang Fan,Zhiguang Liu,Yujing Guo
Cardiac troponin I (cTnI) is a “gold standard biomarker” for clinical diagnose of acute myocardial infarction (AMI) . Rapid, accurate, and sensitive detection methods for cTnI are highly urgent and significant in early diagnosis and progression control. In this work, we proposed an electrochemical aptasensing platform for cTnI detection based on copper nanowires/molybdenum disulfide/reduced graphene oxide (CuNWs/MoS 2 /rGO) ternary nanostructure. The CuNWs/MoS 2 /rGO composite exhibited improved electrochemical activity due to the high electrochemical conductivity and the synergistic effect among each component, and the large surface area, which also facilitates the immobilization of aptamers. As a result, the constructed electrochemical cTnI aptasensor shows good selectivity, stability, and reproducibility towards cTnI. Under optimized conditions, the aptasensor responses cTnI linearly from 5.0 × 10 −13 to 1.0 × 10 −10 g mL −1 with a detection limit of 1.0 × 10 −13 g mL −1 (S/N = 3). The analysis of cTnI in human blood samples demonstrated its practicability with comparable results. This work offers an alternative way for facile fabrication of CuNWs/MoS 2 /rGO based aptasensor for clinical biomarker detection.
研究领域:
生物医学工程
·
分析化学
·
心血管疾病诊断
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Dong Ma,Juan Wu,Mengchun Gao,Yanjun Xin,Tianjin Ma,Yuying Sun
An efficient visible-light-driven Z-scheme g -C 3 N 4 /RGO/Bi 2 WO 6 composite was fabricated by the hydrothermal method. The prepared g -C 3 N 4 /RGO/Bi 2 WO 6 composite were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen sorption, Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectrometer (XPS). The photocatalytic activity of the g -C 3 N 4 /RGO/Bi 2 WO 6 composite was evaluated by the degradation of 2,4,6-trichlorophenol (TCP) under visible-light irradiation. The photochemical test and scavenging experiment showed the photogenerated electrons (e − ) and holes (h + ) had strong reducing capability and oxidation capability, respectively. The photocatalytic activity of the g -C 3 N 4 /RGO/Bi 2 WO 6 composite was higher than that of the pure g -C 3 N 4 , Bi 2 WO 6 , and g -C 3 N 4 /Bi 2 WO 6 during the TCP degradation, which could be due to the efficient visible-light utilization efficiency and the construction of Z-scheme. RGO served as a charge transmission bridge between the g -C 3 N 4 and the Bi 2 WO 6 , and the Z-scheme kept the electrons with high reducing capability in the conduction band (CB) of g -C 3 N 4 and the holes with high oxidation capability in the valence band (VB) of Bi 2 WO 6 . The photogenerated holes of Bi 2 WO 6 were the major active species in the TCP oxidative degradation, and the photogenerated electrons of g -C 3 N 4 were the major active species in the TCP dechlorination.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）