Materials
·
2021
·Vol. 14
·期 10
·2629
·
IF 3.623
Shimin Chen,Bo Li,Rengui Xiao,Huanhu Luo,Siwu Yu,Jinghang He,Xia Liao
In this work, a ternary TiO2/Graphene oxide/Polyaniline (TiO2/GO/PANI) nanocomposite was synthesized by in situ oxidation and use as a filler on epoxy resin (TiO2/GO/PANI/EP), a bifunctional in situ protective coating has been developed and reinforced the Q235 carbon steel protection against corrosion. The structure and optical properties of the obtained composites are characterized by XRD, FTIR, and UV–vis. Compared to bare TiO2and bare Q235, the TiO2/GO/PANI/EP coating exhibited prominent photoelectrochemical properties, such as the photocurrent density increased 0.06 A/cm2and the corrosion potential shifted from −651 mV to −851 mV, respectively. The results show that the TiO2/GO/PANI nanocomposite has an extended light absorption range and the effective separation of electron-hole pairs improves the photoelectrochemical performance, and also provides cathodic protection to Q235 steel under dark conditions. The TiO2/GO/PANI/EP coating can isolate the Q235 steel from the external corrosive environment, and may generally be regarded a useful protective barrier coating to metallic materials. When the TiO2/GO/PANI composite is dispersed in the EP, the compactness of the coating is improved and the protective barrier effect is enhanced.Keywords:TiO2/GO/PANI nanocomposite;epoxy resin;barrier protection;photocathode protection
研究领域:
材料科学
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腐蚀工程
·
纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 3
·e53341
·
IF 3.057
Zhehong Lu,Yubing Hu,Tengyue Zhang,Hao Li,Haoran Bai,Guangpu Zhang,Fan Guo,Wei Jiang
The anti-migration ethylene propylene diene terpolymer (EPDM) inhibitor coating was prepared by using EPDM as a composite matrix and silicon-functionalized graphene oxide (GO-SiO 2 ) as modifiers to prevent the migration of energetic plasticizers in propellants. The anti-migration performance at different temperatures was analyzed by investigating the diffusion of dioctyl sebacate (DOS) using thermal analysis and immersion tests. After adding 1.0 wt% GO-SiO 2 , the overall performance of the inhibitor coating was the best, and the concentration of DOS that migrated into the inhibitor coating at 30°C was reduced from 45.1% to 38.8% (13.9% decrease). The results confirmed that the introduction of GO-SiO 2 prevented the migration of dioctyl sebacate to the EPDM inhibitor coating. The scanning electron microscopy results showed that GO-SiO 2 was well-dispersed in the inhibitor coating, and the tensile strength increased from 1.80 to 2.11 MPa. Migration kinetics analysis showed that the anti-migration performance was closely related to the crosslink density.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 15
·7067-7076
·
IF 7.233
Jiantao Yu,Sihui He,Chen Shao,Haoran Zhao,Jing Li,Leilei Tian
The design of a nano-system for the detection of intracellular microRNAs is challenging as it must fulfill complex requirements, i.e., it must have a high sensitivity to determine the dynamic expression level, a good reliability for multiplex and simultaneous detection, and a satisfactory biostability to work in biological environments. Instead of employing a commonly used physisorption or a full-conjugation strategy, here, a GO-DNA nano-system was developed under graft/base-pairing construction. The common anchor sequence was chemically grafted to GO to base-pair with various microRNA probes; and the hybridization with miRNAs drives the dyes on the probes to leave away from GO, resulting in “turned-on” fluorescence. This strategy not only simplifies the synthesis but also efficiently balances the loading yields of different probes. Moreover, the conjugation yield of GO with a base-paired hybrid has been improved by more than two-fold compared to that of the conjugation with a single strand. We demonstrated that base-paired DNA probes could be efficiently delivered into cells along with GO and are properly stabilized by the conjugated anchor sequence. The resultant GO-DNA nano-system exhibited high stability in a complex biological environment and good resistance to nucleases, and was able to accurately discriminate various miRNAs without cross-reaction. With all of these positive features, the GO-DNA nano-system can simultaneously detect three miRNAs and monitor their dynamic expression levels.
研究领域:
分子生物学
·
纳米医学
·
生物化学
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DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2024
·
IF 3.1
Zhang Beibei,Zhang Lihua,Li Jin,Qiang Qi
Carbon emission reduction has been accepted as a common concern all over the world. Currently, CO 2 emission is mainly derived from the consumption of fossil fuels. To solve this issue, there is an urgent need to develop technologies for CO 2 capture. The utilization of membrane technology to remove CO 2 from a mixture gas attracts great interest. In the present work, poly(2-hydroxyethyl methacrylate- co -vinylamine) was synthesized by polymerization ( n -vinyl formamide and 2-hydroxyethyl methacrylate), hydrolysis, and ion exchange. The surface function of graphene oxide was carried out by aerobic self-polymerization of dopamine. The mixed matrix membranes were fabricated by adding the nanofiller (before and after modification) into the polymeric matrix. The membrane properties and its structure were characterized by FTIR, TGA, XRD, and SEM. The effect of nanofiller content and operation conditions on membrane performance was investigated. Results showed that the additions of nanofiller could decrease the crystallization of these membranes and effectively improve gas permeance. Remarkably, for the addition of 2.0 wt% dopamine-modified graphene oxide, the CO 2 permeance of the membrane was increased by 30.9% while achieving a CO 2 /N 2 selectivity of 83.5. The CO 2 permeation for CO 2 /CH 4 was also increased by 16.77%. These were surpassed over the 2008 Robeson’s upper bound. These resultant membranes demonstrated attractive potential for low-pressure post-combustion CO 2 capture. Besides, the stability of longtime tests on membranes was studied, and it was observed that membranes exhibited excellent stabilization with continuously operated for 220 h. The excellent properties of these membranes provide new opportunities for gas separation applications.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Bin Xiang,Jingling Gong,Yuqing Sun,Jian Li
The poor mechanical durability and weak fouling resistance of oil/water separation membranes severely restrict their applications in industry. Herein, a robust PVA/GO@MOF membrane with fast photothermal self-cleaning capability was developed through facile chemical crosslinking and suction-filtration strategies. Attributed to the powerful underwater superoleophobicity, the PVA/GO@MOF membrane exhibited extraordinary anti-oil adhesion even for high-viscosity crude oil and continuous crude oil emulsion purification capability with stable flux (1020 L m −2 h −1 bar −1 ) and exceptional efficiency (> 99.3%) even after 60 min. Most importantly, in comparison to reported photocatalytic self-cleaning oil/water separation membranes, the PVA/GO@MOF membrane can degrade organic contaminants more rapidly with a higher degradation rate (99.9%) in 50 min due to the superior photothermal conversion capacity. The synergistic photothermal and photocatalytic effects significantly enhanced photodegradation efficiency, which created opportunities for in-depth treatment of complex oily wastewater. Besides, the obtained membrane displayed excellent chemical and mechanical durability with underwater oil contact angle (UWOCA) above 150° even in harsh environments, such as corrosive solutions, UV irradiation, ultrasound treatment, abrasion experiment and bending test. Therefore, the developed PVA/GO@MOF membrane with robust durability and fast photocatalytic self-cleaning property is highly expected to purify oily wastewater and degrade organic pollutants .
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CULTURAL HERITAGE
·
2023
·
IF 3.1
Lina Xie,Lan Yao,Bingjian Zhang,Yulan Hu
The moss colonization on the surface of historic buildings could result not only in a biodeterioration but also in an aesthetical damage. In this study, some mixtures of consolidant (MMH) and GO@CuO hybrids were developed to control moss growth on the surface of weathered sandstone. An innovative aspect of the study was that, by using GO as the intermediate, the CuO nanoparticles were anchored to the MMH consolidant. This method could effectively improve the binding force between CuO nanoparticles and the stone substrate and make it not be washed away by rainfall. Several formulations have been prepared, applied on weathered sandstone specimens, and tested in laboratory to investigate the impact of GO@CuO hybrids addition on consolidation performance. The complex consolidants were subjected to an antibiological activity assay to assess their capability to inactivate moss spores. The complex consolidants were also applied to the specimens covered with mosses. The obtained results demonstrated that the consolidant loaded with GO@CuO hybrids were effective in consolidating the weathered substrate and preventing moss growth on its surface. Additionally, the complex consolidant also had the function of controlling re-colonization of moss after conservation treatment.
研究领域:
文物保护
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材料科学
·
微生物学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wei Yang,Mingli Cao
The removal of heavy metal ions from the aqueous environment is an important topic as heavy metal pollution is widely distributed in water bodies, causing serious damage to aquatic ecosystems and worsening the already scarce freshwater resources. In this work, we report the synthesis of novel ZIF-8@GO-COOH composite nanosorbent materials by in situ self-assembly. The physicochemical properties of the composites were investigated using relevant characterisation techniques, and the adsorption capacity of ZIF-8@GO-COOH for copper and lead ions in aqueous solution was tested by batch adsorption experiments. The adsorption behaviour was analysed by combining adsorption kinetics, adsorption isotherm model and Van't Hoff model. The results showed that the adsorption capacities of ZIF-8@GO-COOH for Cu(II) and Pb(II) were 93.26 mg/g and 95.875 mg/g, respectively, when the initial heavy metal ion concentration was 100 mg/L, the adsorption time was 60 min, the temperature was 293 K and the pH conditions were suitable. The high adsorption performance of ZIF-8@GO-COOH was attributed to its surface with abundant oxygen-containing functional groups and excellent specific surface area, which gives it a significant advantage in the removal of heavy metal ions from aqueous solutions.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yali Yao,Jinmei He,Xuedan Zhu,Leihuan Mu,Jiehui Li,Kanshe Li,Mengnan Qu
Rationally designing cost-efficient, high-activity and durable electrocatalysts are used for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is sense to solve the energy crisis and conversion. Herein, the heterostructure superwetting Co–MoS 2 /Ni 3 S 2 -GO/NF electrode is successfully fabricated by a typical hydrothermal reaction and it's electrocatalytic performance is also systematically studied. Thanks to the establishment of Co doped MoS 2 /Ni 3 S 2 heterojunction , the improvement conductivity by the addition of graphene oxide (GO), and the superhydrophilicity and superaerophobicity of microstructure, the electrode shows excellent catalytic characteristics and only need an overpotential of 123 mV for OER and 161 mV for HER to reach 10 mA cm −2 and can work steadily for 15 h in alkaline solution. Remarkebly, the superwetting heterojunction electrode demonstrated excellent overall water decomposition ability when used as bifunctional electrocatalyst in 1.0 M KOH and only 1.47 V is required to achieve 10 mA cm −2 . Density functional theory (DFT) calculations show the constructed heterogeneous interface and Co doping are conducive to optimizing the chemisorption energy of hydrogen-containing intermediates. This work provides a new way of thinking that collaborative optimization of electrode structure and surface wettability regulation to increase the active area of reaction and accelerate the bubble release toward high-performance OER and HER electrodes .
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Tianqi Jiang,Jialiang Zhou,Ruixue Wang,Hengxue Xiang,Jinqi Wang,Zexu Hu,Senlong Yu,Gongxun Zhai,Chao Jia,Meifang Zhu
Achieving rapid and long-term antibacterial effects in medical protective textiles is a significant challenge. In this work, Cu 2 O-GO nanocomposites are prepared by in-situ growth of small-sized cuprous oxide (Cu 2 O) nanoparticles on the surface of graphene oxide (GO). At a concentration of 20 µg/mL, Cu 2 O-GO achieves 99 % antibacterial rate against E. coli and B. subtilis within 10 min, with complete eradication in 30 min. After 6 months of air exposure, the Cu 2 O-GO exhibits an antibacterial efficacy of 84.7 % against B. subtilis and 96.7 % against E. coli , significantly higher than that of Cu 2 O alone. PA6/Cu 2 O-GO fibers produced via melt spinning show over 99.99 % antibacterial efficiency at just 0.6 % addition and retain effectiveness even after 50 washes. The antibacterial mechanism of Cu 2 O-GO involves the release of copper ions and generation of reactive oxygen species, which disrupt bacterial cell membranes, leading to protein and DNA damage, ultimately causing cell death. This research offers valuable insights for the development of long-term antibacterial materials.
研究领域:
材料科学
·
微生物学
·
医学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Tengyang Zhu,Sheng Xu,Fen Yu,Xi Yu,Yan Wang
In this study, ZIF-8@GO composites with continuous inner channels for ethanol molecules were prepared by the in-situ growth of zeolitic imidazolate framework-8 (ZIF-8) nanoparticles onto the surface of graphene oxide (GO) nanosheets , and filled into polydimethylsiloxane (PDMS) matrix to fabricate PDMS/ZIF-8@GO mixed matrix membranes (MMMs) for ethanol recovery via pervaporation . The as-prepared ZIF-8@GO composites and PDMS/ZIF-8@GO MMMs were characterized by various techniques. The results showed that ZIF-8 nanoparticles were uniformly dispersed on the surface of GO nanosheets and the hydrophobicity of ZIF-8@GO composites was stronger than GO due to the surface modification of GO by hydrophobic ZIF-8. Moreover, ZIF-8@GO composites as the filler not only exhibited the excellent compatibility with PDMS but also showed the good dispersion in PDMS matrix as compared to ZIF-8 nanoparticles. Therefore, ZIF-8@GO-based MMMs showed better separation performance than ZIF-8-based MMMs. The pervaporation performance of PDMS/ZIF-8@GO MMMs was studied by adjusting the filler type, particle loading, membrane thickness, and feed temperature. The optimized PDMS/ZIF-8@GO MMMs displayed a prominent separation factor of 22.2 with a total flux of 443.8 g/m 2 h with 5 wt% ethanol aqueous solution at 40 °C, and therefore the superior pervaporation performance to most other PDMS-based MMMs. The excellent pervaporation results were attributed to the synergistic effect of GO nanosheet as a strong barrier and hydrophobic ZIF-8 nanoparticles with the continuous inner channels. The synergistic effect of hybrid particles may provide valuable guidance to the development of high-performance PDMS-based MMMs for pervaporation recovery of various organic compounds.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 92
·89221-89230
·
IF 3.289
Jing Hong,Changhua Liu,Xi Deng,Ting Jiang,Lin Gan,Jin Huang
SiO2 coated with graphene oxide (GO) hybrids (SiO2@GO) were fabricated by electrostatic self-assembly and introduced into an epoxy polymer (EP) matrix to prepare epoxy composites by a solvent-free curing process. The thermal stability, mechanical properties and tribological behavior of SiO2@GO/EP composites were investigated and compared. It was found that the epoxy composites with the aligned core–shell structure of SiO2@GO improved the thermal stability, as well as excellent mechanical and tribological properties. The low content 0.5 wt% SiO2@GO/EP nanocomposites exhibited nearly 88.4% reduction in the friction coefficient and several orders of magnitude reduction in wear rate, constituting a potential breakthrough for future tribological applications. Compared with unfilled epoxy polymers or epoxy polymers with unmodified fillers, the major increase in the tribological properties of the SiO2@GO/EP composites shows the synergy effect between nano-SiO2 and GO during the wear process. The behavior of nano-SiO2 and GO were probably mostly due to ball-bearing and an ultrathin lamellar effect, respectively. The obtained results indicate that the core–shell structure of SiO2@GO as a more effective synergistic system is a valid method for greatly improving the friction and wear properties and mechanical properties of resin-based composites.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2023
·Vol. 13
·期 2
·241
·
IF 4.2
Haiyan Wu,Ling Wang,Wentao Xu,Zehai Xu,Guoliang Zhang
Serious membrane fouling has limited the development of ultrafiltration membrane technology for water purification. Synthesis of an ultrafiltration membrane with prominent anti-fouling ability is of vital importance. In this study, CAB−GO composite nanosheets were prepared by grafting graphene oxide (GO) with a zwitterionic material cocamidopropyl betaine (CAB) with strong antifouling properties. Anti-fouling CAB−GO/PES mixed matrix ultrafiltration membrane (CGM) was prepared by the phase inversion method with polyethersulfone (PES). Due to its electrostatic interaction, the interlayer distance between CAB−GO nanosheets was increased, and the dispersibility of GO was improved to large extent, thereby effectively avoiding the phenomenon of GO agglomeration in organic solvents. Based on the improvement of the surface porosity and surface hydrophilicity of the CAB−GO/PES mixed matrix membrane, the pure water flux of CGM−1.0 can reach 461 L/(m2·h), which was 2.5 times higher than that of the original PES membrane, and the rejection rates toward BSA and HA were above 96%. Moreover, when the content of CAB−GO was 0.1 wt%, the prepared CAB−GO/PES membrane exhibited very high BSA (99.1%) and HA (98.1%) rejection during long-term operation, indicating excellent anti-fouling ability.Keywords:antifouling;zwitterionic polymer;polyethersulfone (PES);graphene oxide (GO);mixed matrix ultrafiltration membrane
研究领域:
材料科学
·
环境工程
✓ 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）