INTEGRATED FERROELECTRICS
·
2023
·
IF 0.7
Yuguo Zhuo,Jun Liu,Baocheng Zhao
To strengthen waterborne polyurethane/polyvinyl alcohol nanofibers which is a potential filtering material, in this work, modified graphene oxide (GO) was mixed into the solution of waterborne polyurethane and polyvinyl alcohol. By electrospinning, the modified GO/waterborne polyurethane/polyvinyl alcohol nanofibers were prepared. The composite nanofibers showed good thermal behavior due to the addition of modified GO. The results show that the maximum thermal decomposition temperature of nanofibers film increased by 26 °C when the content of modified GO was 0.4% in the composite nanofiber. At the same time, the tensile property of the composite nanofiber was improved and a better mechanical behavior appeared when using a rotating way to fabricate the nanofibers, which the value of tensile length at break in the radial direction and tensile strength at break in arc direction rose by 68.7% and 38.7% separately.
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 8
·1-11
·
IF 1.784
Dong Rui,Wang Luming,Zhu Jichao,Liu Lili,Qian Yanling
The nanohybrids of silicon dioxide–graphene oxide (SiO 2 –GO) were prepared by surface modification of graphene oxide (GO) by the hydrolysis of the tetraethoxysilane (TEOS) and then the SiO 2 –GO was added into acrylic resin as reinforcement to prepare acrylic nanocomposites. The structure of SiO 2 –GO was characterized by XRD, FT-IR, Raman and the morphology and dispersion study of SiO 2 –GO were observed by SEM and TEM. The results showed that the SiO 2 –GO was dispersed well in the acrylic resin matrix. Furthermore, the corresponding thermal, mechanical, and chemical resistance properties of the SiO 2 –GO/acrylic resin nanocomposites with mass ratios of SiO 2 –GO to acrylic resin (0.04, 0.06, 0.08, 0.10, and 0.12 wt%) were studied and compared with those of pure acrylic resin and the GO/acrylic resin nanocomposites with the same mass ratios of GO to acrylic resin. The results revealed that the loading of SiO 2 –GO effectively enhanced various properties of acrylic resin, which provides a new method for preparation of graphene nanocomposites.
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ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Leipu Zhao,Cui Du,Chen Zhou,Shasha Sun,Yuanzheng Jia,Jiasheng Yuan,Guangming Song,Xin Zhou,Qian Zhao,Shengyang Yang
Currently, the development of membranes with efficient absorption of solar light has enabled the evaporation and purification of water using solar energy. However, the resolution of the dilemma between the water evaporation rate and the ultradeep removal of contaminants remains a challenge. Here, we report a structurally ordered AgNPs@C3N4/GO (SCG) membrane with both vertical channels and layer nanostructures, which enhance the water evaporation rate and facilitate the removal efficiency of contaminants simultaneously. The water evaporation rate increases by ∼3.5 times in the presence of the SCG membrane, leading to an optothermal conversion efficiency of 77% under a low solar intensity (1 sun) and high humidity (∼65%). More importantly, the as-prepared SCG membrane is capable of clearing diverse contaminants and salts, including dyes, pathogens (e.g., bacteria, viruses, parasites), and metal ions (e.g., Cd2+, Pb2+, Cr2+, Na+, K+, Mg2+, Ca2+), with an extremely high removing efficiency. We envisage that the ordered structure in both vertical and horizontal directions can achieve a large mass flux and highly efficient decontamination. Therefore, it can be expected that the scale-up fabrication of solar absorbers with tailorable nanostructures for thorough wastewater purification and seawater desalination can help people who live in regions with a scarcity of clean water.
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2020
·Vol. 21
·期 12
·4224
·
IF 4.556
Wenxiu Yang,Yonggui Li,Long Feng,Yimiao Hou,Shuo Wang,Bo Yang,Xuemin Hu,Wei Zhang,Seeram Ramakrishna
Photothermal conversion materials have attracted wide attention due to their efficient utilization of light energy. In this study, a (GO)/Bi2S3-PVDF/TPU composite nanofiber membrane was systematically developed, comprising GO/Bi2S3nanoparticles (NPs) as a photothermal conversion component and PVDF/TPU composite nanofibers as the substrate. The GO/Bi2S3NPs were synthesized in a one-step way and the PVDF/TPU nanofibers were obtained from a uniformly mixed co-solution by electrospinning. GO nanoparticles with excellent solar harvesting endow the GO/Bi2S3-PVDF/TPU membrane with favorable photothermal conversion. In addition, the introduction of Bi2S3NPs further enhances the broadband absorption and photothermal conversion properties of the GO/Bi2S3-PVDF/TPU composite membrane due to its perfect broadband absorption performance and coordination with GO. Finally, the results show that the GO/Bi2S3-PVDF/TPU composite membrane has the highest light absorption rate (about 95%) in the wavelength range of 400–2500 nm. In the 300 s irradiation process, the temperature changes in the GO/Bi2S3-PVDF/TPU composite membrane were the most significant and rapid, and the equilibrium temperature of the same irradiation time was 81 °C. Due to the presence of TPU, the mechanical strength of the composite film was enhanced, which is beneficial for its operational performance. Besides this, the morphology, composition, and thermal property of the membranes were evaluated by corresponding test methods.Keywords:graphene oxide/bismuth sulfide;solar distillation;nanofiber membrane;photothermal conversion
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PubMed
高影响因子
Environmental Science-Nano
·
2019
·Vol. 6
·期 12
·3723-3733
·
IF 7.704
Abdul Ghaffar,Cheng Chen,Xiaoying Zhu,Baoliang Chen
Accidental oil spills during oil exploration, production and transportation constitute a significant environmental threat, and thus remain a major challenge. Given that, common polymeric membranes often exhibit surface fouling, which limits their long term practical applications and makes it hard to recycle them with efficient flux stability and separation efficiency. Herein, we report a versatile porous structured polyvinyl alcohol (PVA) based nanofibrous membrane (NFM) with graphene oxide (GO), prepared by simple and straightforward electrospinning, to remediate oily water. The PVA–GO NFM was prepared keeping in view an effective pore geometry and selective wettability to facilitate oily water emulsion separation entirely under gravitational force, with a controlled GO ratio and compatibility to avoid aggregation, allowing easy spin ability. The morphology of the PVA NFM was completely changed in the presence of GO due to homogenous distribution with robust mechanical strength and outstanding thermal stability. As a result, the as-prepared PVA–GO NFM achieves a separation efficiency of above 99% for surfactant-free and surfactant-stabilized oily water emulsions with a water flux of approximately 45 and 30 L m−2 h−1, entirely under gravitational force due to the presence of GO. Furthermore, the PVA–GO NFM maintains its actual selectivity and surface wettability even after recycling, thereby allowing long term applications with almost the same separation efficiency and water flux. The present methodology for membrane fabrication is believed to be an effective energy saving filtration approach, with anti-oil property and reusability, and thus is promising for practical use in water purification and treatment processes, specifically for oily water remediation.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Yangyang Mao,Mengchen Zhang,Long Cheng,Jianwei Yuan,Gongping Liu,Libo Huang,Mihail Barboiu,Wanqin Jin
Inspired by fast and selective water transport in natural Aquaporin (AQP), imidazole-quartet water channels (IQWC) constructed by imidazole-ureido (IU) molecular scaffolds, are excellent candidates to design membranes with fast and selective water transport properties. In this work, a water binding IU bola-amphiphile-imidazole compound was embedded with the hydrophilic and laminated graphene oxide (GO) to prepare IU-GO membrane. H NMR, TG, XRD , SEM, AFM and FTIR were conducted to characterize physicochemical properties of IU and IU-GO membrane. It was demonstrated that IU could well interact with GO to generate a robust membrane structure. The resulting IU-GO membranes were applied for pervaporation dehydration of n -butanol-water. The total flux and the separation factor of the optimized IU-GO membrane were 3506 g·m -2 ·h -1 and 4454 respectively when the membrane was measured at 343 K with butanol content of 80 wt%. Furthermore, the membrane exhibited good stability and separation performance during 120 h continuous operation test, showing great potential in application of solvent dehydration.
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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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高影响因子
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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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Chao Huang,Miao Sun,Ying Wang,Lixian Shi,Xuan Liu,Nantao Hu
Separation membranes based on graphene oxide (GO) have attracted much attention due to their good separation properties. But its instability in water and rejection of divalent salt ions is a problem that needs to be solved urgently. In this study, molybdenum disulfide (MoS 2 ) is intercalated into graphene oxide by adding polyethyleneimine (PEI) solution drop by drop for cross-linking, and then GO/MoS 2 /PEI composite membrane is prepared by vacuum filtration. As MoS 2 hydrophobicity increases frictionless water flow channels to improve water flux, PEI cross-linking improves membrane stability and rejection of divalent salt ions. The modified composite membrane has a high rejection of 94.8 % for Mg 2+ , and water flux is increased by 30 % relative to GO/PEI membrane. In addition, the rejection of the composite membrane to different salt solutions is investigated by MgCl 2 , MgSO 4 , NaCl and Na 2 SO 4 solutions, and the results obtained are, in order, R(MgCl 2 ) > R(MgSO 4 ) > R(NaCl) > R(Na 2 SO 4 ). This modified composite membrane has great potential for salt ion removal.
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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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高影响因子
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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PubMed
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
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