SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Bing Zhang,Hongyun Meng,Xue Wang,Honghong Chang,Wenlong Wei
Mercuric ion (Hg 2+ ) as one kind of environmental pollutants has attracted more and more attentions due to its persistence, mobility and biological enrichment. In this study, a novel photoelectrochemical biosensor for Hg 2+ detection was constructed based on dye sensitization effect induced by Y-shaped DNA transformation as signal amplification strategy. Firstly, graphene oxide-ZnO-CdS nanohybrid (GO-ZnO-CdS) as photoelectric material was synthesized by simple hydrothermal method, and was employed to modify ITO electrode. Secondly, Y-shape DNA was labeled by Au NPs in the solution, and which crosslinked on the surface of GO-ZnO-CdS modified ITO electrode by carbodiimide coupling method, which resulted in the excitation energy transfer (EET) effect between Au NPs and CdS. Finally, in the presence of Hg 2+ , the structure of DNA on the modified electrode changed from Y-shape into hairpin accompanying the proximity of dye molecule based on T-Hg 2+ -T, which eliminated EET effect and triggered dye sensitization effect for enhancing photocurrent response. Under optimal conditions, the photocurrent linearly increased with the increasing of Hg 2+ levels in the range of 5 pM − 500 pM with the detection limit of 1:5 pM(LOD = 3σ blank / s ). More importantly, the developed biosensor showed the advantages of acceptable selectivity, repeatability and stability.
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MACROMOLECULAR MATERIALS AND ENGINEERING
·
2016
·Vol. 302
·期 2
·1600359
·
IF 2.834
Lei Zhao,Jiahe Huang,Tao Wang,Weixiang Sun,Zhen Tong
A multiple shape memory and self-healing poly(acrylic acid)-graphene oxide-Fe 3+ (PAA-GO-Fe 3+ ) hydrogel with supertough strength is synthesized containing dual physically cross-linked PAA network by GO and Fe 3+ . The first GO cross-linked hydrogel can be reversibly reinforced by immersing in FeCl 3 /HCl and pure water and softened by immersing in HCl. The tensile strength is 2.5 MPa with the break strain of 700%. Multiple shape memory capability is found depending on this unique feature, the hydrogel can be fixed in four temporary shapes by adjusting the immersing time in FeCl 3 /HCl and pure water, and recovered in sequence by immersing in HCl. This hydrogel also exhibits perfect self-healing behavior, the cut as-prepared hydrogel is almost completely healed by immersing in FeCl 3 /HCl. Besides, the hydrogel shows enhanced electrical conductivity with the presence of GO and Fe 3+ . This supertough hydrogel provides a new way to design soft actuators.
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Polymers
·
2025
·Vol. 17
·期 1
·100
·
IF 4.9
Ben Liu,Shixiao Wang,Hanling Guo,Huibo Yin,Yuqiu Song,Min Gong,Liang Zhang,Xiang Lin,Dongrui Wang
Poly(glycolic acid) (PGA) is a rapidly degradable polymer mainly used in medical applications, attributed to its relatively high cost. Reducing its price will boost its utilization in a wider range of application fields, such as gas barriers and shale gas extraction. This article presents a strategy that utilizes recycled PGA as a raw material alongside typical carbon nanomaterials, such as graphene oxide nanosheets (GO) and carbon nanotubes (CNTs), to produce low-cost, fully degradable yarns via electrospinning and twisting techniques. The results demonstrate that the tensile strength of the PGA/GO composite yarn increased to 21.36 MPa, and the elastic modulus attained a value of 259.51 MPa with a 3 wt% of GO loading. The addition of an appropriate amount of GO enhances the tensile resistance of the composite yarns to a certain extent. However, excessive application of GO and CNTs can lead to surface defects in the nanofibers, reducing their mechanical properties. Moreover, the integration of both materials could inhibit the degradation process of PGA to some extent, thereby partially addressing the issue of excessive degradation rates associated with the relatively low molecular weight of recycled PGA.
研究领域:
材料科学
·
医学工程
·
环境科学
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高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Jiangang Liu,Zifei Ren,Bing Wang,Jingyao Feng,Qingguang Bao,Shan Cheng,Ning Wang,Qingfeng Sun,Zhenghui Liu,Xiaonan Shi,Mengting Li,Nan Li,Xigao Jian
Inspired by the strong adhesion properties of mussel byssus protein, this paper presents the construction of a multi-scale TA-APTES-GO interfacial layer aimed at addressing the inadequate interfacial properties of CF/PPESK composites. XPS, Raman spectroscopy, and SEM confirmed that this novel interfacial layer can enhance the activity and roughness of the CF surface, thereby promoting resin infiltration. Furthermore, this interfacial layer exhibits a modulus transition that eliminates the modulus discrepancy between CF and resin matrix, and mitigates stress concentration. Mechanical property tests demonstrated that the incorporation of the TA-APTES-GO interfacial layer increased the ILSS of the composites by 51% and the bending strength by 22%. Additionally, the failure behavior and interfacial strengthening mechanisms of the composites were investigated in detail. The interfacial layer is straightforward to prepare and significantly enhances interfacial properties, offering a promising approach to elevating the interfacial characteristics of CFRTPs. Highlights Based on mussel byssus protein bionics, a TA-APTES-GO multi-scale interface layer was designed and synthesized. TA-APTES-GO significantly enhanced interfacial binding of CF/PPESK. TA-APTES-GO effectively balances the modulus discrepancy between CF and the resin matrix.
研究领域:
材料科学
·
化学工程
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JOURNAL OF CHROMATOGRAPHIC SCIENCE
·
2025
·Vol. 63
·期 5
·
IF 1.3
Yang Qinghua,Deng Honghai,Shi Yilan,Qiu Qianying,Wang Jinxin,Ping Wenhui,Gu Jun,Zhang Weibing
A fast, simple and effective method was developed and validated for determination of 11 fungicides using magnetic solid-phase extraction with NH2-Fe3O4@GO (graphene oxide) combined with gas chromatography–triple quadrupole mass spectrometry (GC–MS/MS). To carry out the extraction of the fungicides from samples, NH2-Fe3O4@GO nanocomposites were synthesized and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. The target analytes were extracted on NH2-Fe3O4@GO and then eluted by ethyl acetate and acetonitrile (1:1 v/v). Finally, the extraction solvent concentrated by nitrogen blowing was analyzed by GC–MS/MS, which demonstrated good linearity between 0.05 and 5.0 mg L−1. The limits of detection (signal-to-noise ratio = 3) and the limits of quantification (signal-to-noise ratio = 10) for the 11 fungicides ranged from 1.0 to 3.5 and 3.0 to 10.5 μg kg−1, respectively. The accuracy and precision of the proposed method were evaluated by measuring tagged samples; the recoveries and relative standard deviations ranged from 75.3% to 103.9% and 2.19% to 4.68%, respectively. The utility of the adsorbent was demonstrated to determine trace fungicides in fresh fruit juice samples.
研究领域:
分析化学
·
食品安全
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高影响因子
JOURNAL OF LIGHTWAVE TECHNOLOGY
·
2025
·
IF 4.8
Xuefeng Zhang,Xuli Bai,Xiaofei Liu,Dan Wang,Hong Han,Zhengguo Xiao,Jianguo Zhang,Zhongquan Nie
We report the broadband optical nonlinearities and ultrafast carrier dynamics of GO doped with CuS nanoparticles (GO-CuS) following the femtosecond pulse lasers. Both the pure GO and GO-CuS hybrid films are first synthesized by the vacuum filter deposition method and their optical nonlinearities are then examined in the wide wavelength range (400 nm-1064 nm) based on the femtosecond Z-scan technique. The results reveal that, compared to the pristine GO, the introduction of CuS not only makes the GO-CuS hybrid film switched from saturated absorption to reverse saturated absorption possible, but also achieves strong broadband optical nonlinear absorption responses and optical limiting effects. It is demonstrated that the strongest nonlinear absorption coefficient (∼3.6×10-7 m/W) appears at 400 nm excitation, which is dozens of times larger than that under the illumination of 1064 nm. By leveraging the femtosecond pump-probe technique, we further study the ultrafast carrier dynamics of the GO-CuS hybrid film carrying the fast and slow relaxation processes. Moreover, the physical mechanisms behind these excellent nonlinear optical responses are elucidated. The findings presented here indicate that the GO-CuS hybrid film can be regarded as a potential promising candidate in various ultrafast photonics devices.
研究领域:
光学
·
材料科学
·
物理学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Rui Zhang,Yu Li,Youfeng Cai,Qiong Han,Tongqing Zhang,Yi Liu,Kunling Zeng,Chen Zhao
Silver-phosphate/graphene oxide/APTES (Ag 3 PO 4 /GO/APTES) composite materials modified by 3-aminopropyltriethoxysilane (APTES) were incorporated into polyvinylidene fluoride (PVDF) membrane to obtain light catalytic membrane. The structure and morphology of Ag 3 PO 4 /GO/APTES were characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetric analyzer (TGA). Next, the morphology structure and roughness of Ag 3 PO 4 /GO/APTES/PVDF membrane were studied using SEM and Atomic force microscopy (AFM). The hydrophilicity and water flux of blended membranes were enhanced by the presence of a large number of hydrophilic groups on the surfaces of GO and APTES. Using Bovine serum albumin (BSA) solution as a pollution model, the multi-cycle anti-organic pollution ability of composite membranes was explored, and the anti-pollution performance was improved. The results showed that with the increase of Ag 3 PO 4 /GO/APTES content in the composite membrane, the rejection rate of dyes increases significantly. The enhanced photocatalytic degradation can be attributed to the presence of RGO which facilitates electron mediation and shuttle. This work provide a method for the efficient removal of dyes from wastewater.
研究领域:
环境科学
·
材料科学
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xia Wang,Xiong Li,Ling-long Xu,Qiao Zhang,Yue Gu
In this paper, γ-aminopropyltriethoxysilane-TiO 2 -GO (KTG) composite particles were prepared using γ-aminopropyltriethoxysilane (KH550) by depositing nano-TiO 2 on graphene oxide (GO) substrate. The KTG/waterborne polyurethane (WPU) composite coating was prepared by blending KTG with WPU. Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), and scanning electron microscope (SEM) were employed to characterize the composition and structure of the GO before and after the modification, while the water resistance, thermal stability and corrosion resistance of the composite coating were examined via water absorption test, contact angle test, thermogravimetric analysis (TGA), and electrochemical impedance spectroscopy (EIS). The results showed that nano-TiO 2 was successfully deposited on the GO surface. The incorporation of KTG composite particles reasonably improved the water resistance, thermal stability and corrosion resistance of the WPU coating. Optimum water resistance of the composite coating with 0.9% KTG incorporation, 1.3% water absorption rate reduction relative to the pure WPU coating, and 283 to 300°C increment in thermal decomposition temperature were achieved. Moreover, the corrosion resistance of the composite coating was significantly improved. Furthermore, a value of 7.89×10 6 Ω·cm 2 coating resistance of the composite coating, 2.56×10 -9 A·cm -2 corrosion current density, and 99.81% corrosion inhibition efficiency can attained.
研究领域:
材料科学
·
化学工程
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xueliang Liu,Qiusen Han,Yufei Zhang,Xinhuan Wang,Shuangfei Cai,Chen Wang,Rong Yang
We report a facile and green route to prepare ligand-free ultrafine rhodium (Rh) nanoparticles decorated on graphene oxide (GO) nanosheets. The ultrafine Rh nanoparticles with average size 1.8 ± 0.4 nm were synthesized by pulsed laser ablation in liquid. The Rh nanoparticles could be uniformly supported on the surface of GO through the electrostatic interaction. The reduction of 4-nitrophenol in presence of NaBH 4 was performed as a model reaction to evaluate the catalytic properties of Rh/GO nanocomposites. The Rh/GO nanocomposites showed remarkable high catalytic activities with rapid and complete conversion of 4-nitrophenol to 4-aminophenol. The kinetic constant rate of the Rh/GO nanocomposites was 7.62 × 10 −3 s −1 , which is 27 times higher than commercial Rh/C catalyst, revealing the high catalytic activity in catalytic hydrogenation. The Rh/GO nanocomposites showed good stability and high catalytic activity due to the small size Rh nanoparticles, uniformly dispersed on GO nanosheets. This work may provide a green and alternative method to prepare ligand-free supported ultrafine noble metal heterogeneous catalysis.
研究领域:
材料科学
·
催化化学
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Runyu Zhang,Yudong Sui,Lina Han,Yehua Jiang
In this work, graphene oxide (GO) was integrated into the established synthesis route of Ni-TMA MOF. The results demonstrate that the resulting Ni-TMA MOF/GO shows pronounced catalytic activity toward the hydrogen sorption behavior of MgH 2 . Morphological characterization indicates that the as-prepared Ni-TMA MOF/GO possesses a dandelion-like microspherical architecture, featuring an overall spherical profile and a hierarchically porous interior with abundant voids. This structural configuration provides enlarged specific surface area and a high density of accessible active sites. Among all investigated composites, MgH 2 -3 wt.% Ni-TMA MOF/GO delivers the best overall hydrogen-storage performance. At 573 K under 2.6 MPa H 2 , it reaches a maximum hydrogen uptake of 6.3 wt%. The composite also exhibits rapid absorption kinetics, taking up 6.0 wt% H 2 within 1 min. In addition, it maintains good cycling durability: after 100 hydrogenation/dehydrogenation cycles, the reversible capacity remains 5.8 wt%.
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Nanomaterials
·
2026
·Vol. 16
·期 8
·467
·
IF 4.8
Lina Wang,Chong Li,Lei Peng,Junyu Niu
The detection of ammonia (NH3) at room temperature is of significant importance for environmental monitoring, industrial safety and early disease diagnosis. In this work, a novel room-temperature ammonia sensor was developed by combining graphene oxide with WO3quantum dots. The as-fabricated sensor exhibited excellent comprehensive sensing performance, including high sensitivity, rapid response, outstanding selectivity, and reliable long-term stability. Specifically, when exposed to 10 ppm NH3, the sensor based on 1.5% GO@WO3nanocomposites achieved a frequency shift of 578 Hz, which was 6.4 times that of the pure WO3QDs sensor. The theoretical limit of detection (LOD) of the sensor was calculated to be 60 ppb, enabling ppb-level NH3detection. In addition, the sensor demonstrated good long-term stability over a two-week period. The enhanced performance of the GO@WO3nanocomposite sensor is attributed to the formation of an ohmic contact between GO and WO3, which eliminates charge transfer barriers, promotes oxygen adsorption, and amplifies the sensing signal. This work provides a simple, efficient, and practical solution for room-temperature NH3detection, offering significant advantages over traditional single-component sensors.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Lingjun Geng,Jingcheng Huang,Haowei Dong,Haifang Wang,Rui Xu,Zhiping Yu,Ibrahim A. Darwish,Yemin Guo,Xia Sun
Organophosphorus pesticides (OPs) have attracted attention due to their widespread application in agriculture and public health sector. Among them, azamethiphos (AZA) may pose risks to non-target organisms and human health through food chain accumulation. Therefore, establishing a highly sensitive and specific detection method of AZA is of great significance for ensuring food safety and ecological protection. In this study, based on graphene oxide-SELEX technology, an aptamer (Apt) with specific recognition for AZA (K d =26.27±1.27 nM) was screened for the first time. This aptamer was subsequently integrated with molecularly imprinted polymers to construct a dual-recognition electrochemical sensor, leveraging the complementary advantages of both recognition elements. This dual-recognition strategy enabled the synergistic enhancement of specific recognition ability, effectively reducing interference from non-target substances and improving sensor selectivity and accuracy. Additionally, a doping strategy was adopted to modify the electrode surface with AuNPs@SnS 2 @ZnCo-MOF nanocomposites, improving electron transfer efficiency and providing abundant active sites, thereby significantly enhancing the electrochemical signal response. The sensor exhibited a wide detection range (1.00×10 −2 -1.00×10 4 ng/mL) and a low limit of detection (3.33×10 −3 ng/mL), while also demonstrating excellent stability and specificity. In summary, this study developed a highly efficient, sensitive and selective electrochemical sensor, providing a novel strategy for the rapid detection of AZA and other organophosphorus pesticides, with broad application prospects in food safety and environmental monitoring.
研究领域:
食品安全检测
·
环境监测
·
生物传感技术
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高影响因子
危险品化学品经营许可证（带存储）