SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Guibin Lou,Lida Shen,Yingjuan Qian,Ya Chen,Huawen Bai,Haixia Cheng,Junwei Xu,Youwen Yang
This work studies the antibacterial and anti-corrosion properties of nickel-graphene oxide (Ni-GO) composite coating and nickel-reduced graphene oxide (Ni-rGO) composite coating deposited by magnetic field assisted scanning jet electrodeposition on manganese steel . Agar plate assessment and cell live/dead staining were used to evaluate the antibacterial property of the two types of composite coatings. The Ni-GO and Ni-rGO composite coatings can effectively improve the antibacterial property of the substrate. The Ni-GO composite coating deposited with graphene oxide (GO) concentration of 0.5 g/L showed the most excellent antibacterial ability, and its antibacterial rate against E. coli and S. aureus within 2 h were 100% and 93%, respectively. Potentiodynamic polarization measurements indicated that the protective efficiency of the two types of composite coatings on the manganese steel reaches 99% after being immersed in 3.5 wt% NaCl solution for 7 days. The combined effect of barrier protection from GO-based materials (GO, rGO) and corrosion products effectively inhibits the corrosion behavior of the two types of composite coatings.
研究领域:
材料科学
·
生物学
·
化学工程
✓ 已验证
DOI
高影响因子
POLYMER INTERNATIONAL
·
2020
·Vol. 69
·期 5
·457-466
·
IF 2.574
Haoyang Sun,Tao Li,Fan Lei,Meng Yang,Dandan Li,Xianhang Huang,Dazhi Sun
Fluorographene (FG) with layer numbers of 3–4 was successfully prepared through facile microwave-assisted liquid phase exfoliation of raw graphite fluoride (GrF). The raw GrF and the as-prepared FG were then directly incorporated into polyamide 66 (PA66) by melt processing without using any surfactants. Microstructural, mechanical and tribological properties of the prepared PA66 composites were investigated. Various characterization results showed that both GrF and FG, as novel solid lubricants, can effectively improve the mechanical and anti-wear performances of the PA66 matrix. It was also found that FG is better at improving mechanical properties and reducing the friction of PA66 than GrF at low concentrations owing to the large surface–volume ratio. The addition of 0.5 wt% FG into PA66 exhibits a ca 13% increase in tensile modulus, ca 5% increase in tensile strength, ca 18% reduction in coefficient of friction (COF) and ca 43% reduction in wear rate. However, at relatively high concentrations, such as 1.0 wt%, GrF shows a better reinforcement effect than FG owing to a uniform dispersion of GrF in the PA66 matrix. The addition of 1.0 wt% GrF into PA66 exhibits a ca 18% increase in tensile modulus, ca 5% increase in tensile strength, ca 37% reduction in COF and ca 46% reduction in wear rate. Wear tests also show that the excellent wear resistance of the PA66 composites is due to the improved mechanical properties and the lubrication of GrF and FG between the worn surfaces. Our current work demonstrates the tremendous potentials of fluorinated carbon materials for enhancing mechanical and anti-wear properties of polymeric materials. © 2020 Society of Chemical Industry
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Ang Mi,Xinbo Qin,Fei Zhang,Rongping Yun,Youjing Zhao,Min Wang,Xu Xiang
Salt-lake brines have emerged as a promising source of lithium; however, the separation of Li + ions from other coexisting ions remains challenging. To surmount this issue, a three-dimensional wrinkled membrane that was based on a H 1.6 Mn 1.6 O 4 (HMO) ion sieve and comprised graphene oxide (GO) and hydroxylated graphene (GOH) was fabricated in this study. The designed structure provided abundant channels for ion migration. The hydroxyl groups of graphene allowed the membrane to exhibit improved Na + –Li + sieving ability. The lithium adsorption capacity of HMO-GOH/GO (20.6 mg/g) was considerably higher than that of HMO (8.9 mg/g) in a low-concentration lithium solution. The adsorption capacity and separation coefficient of HMO-GOH/GO in a high-sodium brine of Na/Li = 49:1 (48.0 mg/g and 47.1) were higher than those of HMO (21.6 mg/g and 29.3, respectively). The adsorption capacity of HMO-GOH/GO remained at 90.8 % of its initial value after 10 adsorption–desorption cycles, thus demonstrating excellent cyclic stability. HMO/GO-GOH shows higher specific capacitance than HMO based on the cyclic voltammetry results. The density functional theory calculations on adsorption energy of Li + ·4H 2 O and the energy barrier across the GOH pore confirm the Na + /Li + sieving capability. The adsorption mechanism was studied by in situ Raman spectroscopy, verifying the formation of Li O bond during lithium adsorption. Overall, this study provides guidance in the pursuit of a remedy for Na Li separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Hui Lu,Simiao Sha,Shaolin Yang,Jiandong Wu,Jinfu Ma,Chunping Hou,Zhilin Sheng
We report a mild, inexpensive, environment-friendly method to fabricate graphene oxide (GO) and reduced graphene oxide (RGO) coated meshes with superhydrophilicity/underwater superoleophobicity and superhydrophobicity/superoleophilicity through scrape coating of GO nanosheets onto stainless steel mesh and electrochemical reduction of the GO coated mesh, respectively. The GO coated meshes exhibit high efficiency for unidirectional separation of mixtures of water and various light oils, while the RGO coated meshes show excellent capability of separating various heavy oils from water. Both types of meshes could maintain their original wettability in harsh environments, and demonstrate high efficiency and recyclability for the separation of water/oil mixtures containing boiling water, acid and salt. In addition, a T-shaped bidirectional device was assembled by fixing the two meshes with inverse wettability at the both horizontal ends of a T-tube, which can achieve continuous high-efficiency separation of various mixtures of water and oil regardless of their density relationship.
研究领域:
材料科学
·
环境工程
·
表面化学
✓ 已验证
DOI
高影响因子
PHYSICA SCRIPTA
·
2024
·Vol. 99
·期 3
·035924
·
IF 2.6
Ke Zhao,Jianzhao Cao,Ying Qi,Peng Wei,Jian Cheng,Yahong Xie
In our study, we selected three prevalent coal types from Xinjiang: Dahuangshan coal (referred to as Y-coal), Black Mountain coal (B-coal), and Kuche coal (K-coal). Initially, we assessed their morphological differences using electron microscopy. Subsequently, we evaluated the superiority of Y-coal through Thermogravimetric Analysis (TGA). Furthermore, we compared their performances using various electrochemical tests, including the J-V curve, dark current curve, open-circuit voltage curve, and Electrochemical Impedance Spectroscopy (EIS) curve. Ultimately, we investigated the potential of synthesizing graphene from Y-coal and its derivatives. The first step was the preparation of multilayer graphene (MG) by treating Y-coal with acid to obtain demineralized coal, followed by treatment in a tube furnace to obtain ultrafine powdered MG. The second step was then followed by successive oxidation and ultrasonication of the already obtained MG to obtain graphene oxide (GO). Finally, ascorbic acid (VC) was selected to treat GO to prepare an aqueous suspension of reduced graphene oxide (rGO). MG (2θ = 26.2°), GO (2θ = 12.4°) and rGO (2θ = 25.5°) were obtained by XRD analysis. C 1s and O 1S were analyzed by XPS spectra. The functional groups −OH, C=O, and −C=C–, which are unique to graphene and its derivatives, were comparatively analyzed using infrared spectroscopy. The change of π→π* was analyzed by the UV–vis method. The absorbance was further found in combination with PL spectra. Immediately after, the morphology of graphite and its derivatives was analyzed by SEM, HRTEM, the physical properties by contact angle and BET, and finally the content of elements C and O by EDS. The successful demonstration of the superiority of the synthesized MG and its derivatives was achieved.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Ruixue Meng,Xinxin Wang,Deping Li,Kewei Zhang,Xiankai Li,Yanhui Li,Long Chen,Lijie Ci
Effective organic dyes selective separation from high salinity textile wastewater consisting of inorganic salts and organic dyes is of great significant for the textile wastewater treatment . Graphene oxide (GO) have been used widely to form ultrathin high-permeance membrane for molecular and ionic sieving. However, swelling and membrane fouling of GO membrane hampered its practical applications. In this work, high stability and antifouling reduced graphene oxide (rGO) membranes were prepared, and Fe 2 O 3 nanoparticles was used as intercalation to turn the membrane interlayer spacing. The rGO/2Fe 2 O 3 nanocomposite blended membrane exhibited high permeance of 24.90 L m −2 h −1 bar −1 , excellent organic dyes rejection (98.15 % and 98.69 % for methylene blue and Evans blue, respectively) and low salt retention (6.26 % for NaCl). Meanwhile, this membrane demonstrated a superior selective dye/salt separation factor up to 232 with a high rejection of 99.59 % to Evans blue and a lower salt rejection of 5.03 % to NaCl. Furthermore, nanofiltration experiments towards Evans blue/NaCl mixed solution indicated that the membrane also exhibited excellent antifouling performance with flux recovery rate of >86 % after six fouling/backwash cycles. Therefore, our work may provide a promising idea for the development of two-dimensional nanofiltration membranes for efficient high salinity textile wastewater treatment.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
BIOLOGICAL TRACE ELEMENT RESEARCH
·
2014
·Vol. 159
·期 1
·393-398
·
IF 1.608
Jin Chan,Wang Fude,Tang Ying,Zhang Xiangzhi,Wang Jianqiang,Yang Yongji
Graphene and its derivatives are increasingly applied in nanoelectronics, biosensing, drug delivery, and biomedical applications. However, the information about its cytotoxicity remains limited. Herein, the distribution and cytotoxicity of graphene oxide (GO) and TiO 2 -graphene oxide composite (TiO 2 -GO composite) were evaluated in A549 cells. Cell viability and cell ultrastructure were measured. Our results indicated that GO could enter A549 cells and located in the cytoplasm and nucleus without causing any cell damage. TiO 2 nanoparticles and GO would be separated after TiO 2 -GO composite entered A549 cells. TiO 2 -GO composite could induce cytotoxicity similar to TiO 2 nanoparticles, which was probably attributed to oxidative stress. These results should be considered in the development of biological applications of GO and TiO 2 -GO composite.
研究领域:
纳米技术
·
生物医学工程
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH INNOVATIONS
·
2022
·
IF 0
Ye Wu,Wenyun Bao,Yibing Xie,Chen Yao
The well-controlled graphene was prepared by pre-oxidisation, full-oxidisation and hydrothermal reduction of flake graphite. The graphene oxide (GO) reveals the overlapped few-layer structure and the reduced graphene oxide (RGO) shows well-dispersed few-layer structure. Raman spectra analysis indicates that the RGO shows higher B band/G band ratio value than GO, indicating well-restored SP2 carbon atom arrangement and crystal structure. Both fewer-layer GO and RGO were coated on nickel form for supercapacitor electrode application. The GO with sufficient hydroxyl, epoxy and carboxyl groups reveals low conductivity and low current response, which causes low specific capacitance of 0.36, 0.38 and 0.55 F g−1 at 0.5 A g−1 in Na2SO4, KOH and LiOH electrolyte solution, respectively. The RGO with high conductivity reveals the enhanced specific capacitance of 37.12, 51.80 and 61.31 F g−1 at 0.5 A g−1. The LiOH electrolyte with superior ionic diffusion coefficient leads to higher capacitance performance of fewer-layer GO and RGO than other electrolytes. The RGO shows much higher current response than GO at the same scan rate in cyclic voltammetry measurement, which is ascribed to its higher electroactivity. The similar capacitance enhancement of RGO was achieved through cyclic voltammetry-based capacitance and galvanostatic charge/discharge-based capacitance measurements. Accordingly, fewer-layer RGO reveals the superior electrochemical capacitance performance in LiOH electrolyte for the effective energy-storage application.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 25
·
IF 1.86
Yanping Wu,Lei Chen,Songlv Qin,Jinlong Li,Huidi Zhou,Jianmin Chen
A functionalized graphene, fluorinated graphene nanosheets (FGS), and SiO 2 nanoparticles as reinforcing fillers were employed to improve the mechanical properties of the solution styrene butadiene and butadiene rubber composites (SSBR-BR). The results showed that the mechanical properties of SSBR-BR composite filled with FGS were substantially improved than those of the unfilled and equivalent filler loaded graphene oxide (GO) and reduced graphene oxide (rGO) filled SSBR-BR composites. It can be ascribed to the fact that the hydrophobic surface of FGS can be endowed the good dispersion in rubber matrix and stronger interfacial interaction between rubber and fillers. The tribological properties of these composites are also investigated. The results reveal that incorporation of GO, rGO, and FGS in SSBR-BR composites can decrease antiwear properties because the existence of layered graphene promotes to tear and peel off. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44970.
研究领域:
材料科学
·
力学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2022
·
IF 7.693
Xiaotao Zhang,Shun Zhou,Han Zhou,Dongxu Li
In this study, the effect of the incorporation of GO and KH550 modified GO(MGO) on the microstructure, mechanical properties and hydration process of the cement-based composites has been discussed. It is observed that the MGO surface is grafted with the functional groups, which reduce the interlayer force, thus, the dispersibility in the cement paste is improved. In addition, compared with GO, the addition of MGO can further promote the hydration of cement, and optimize the content of the various hydration products owing to no impact on the types of the hydration products, thus, make the microstructure of the cement more uniform. At the same time, the incorporation of MGO can refine the CH crystal size, reduce the total porosity of the cement material, and promote the conversion of harmful pores to harmless pores, thus, making the cement-based materials more compact and effectively improving the mechanical properties.
研究领域:
材料科学
·
土木工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 26
·12065-12081
·
IF 3.553
Ma Ning,Wang Shichao,Li Haidong,Xu Xingqin,Huang Linjun,Wang Yao,Strizhak Peter E.,Tang Jianguo
Preparation of the graphene-containing fibers is an important step in the fabrication of advanced materials. However, using conventional techniques, e.g., wet or dry spinning, requires sophisticated recipes for fabricating the graphene oxide (GO) fibers because the GO dispersion has a low viscosity and it cannot be directly used for spinning. In this work, a simple and reliable procedure, injection spinning (IS), for a direct spinning of GO is reported. According to IS, the thin flow which is squeezed-out from a nozzle forms a flat fiber and provides the spinning drawing force to break the weak spinning thin flow of the GO water–ethanol suspension. The GO flat fiber is finally obtained by drying at a low temperature of 50 °C. The GO flat fiber is twisted and reduced by HI resulting in a production of the reduced GO (rGO) yarn. After passing the relevant characterization test, we show that varying the spinning speed changes the morphology of the rGO yarns on microscale without the appearance of appreciable changes on the nanoscale. The rGO yarns are characterized by high values of Young’s modulus about 1.5 GPa. An application is demonstrated using IS for flexible and wearable electronics.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Xi Zhou,Huiqin Wu,Xiaolan Huang,Fang Hang,Huitai Luo
This study established a simple and rapid method for determination of short-chain chlorinated paraffins (SCCPs) and medium-chain chlorinated paraffins (MCCPs) by dispersive liquid–liquid micro-extraction coupled with high performance liquid chromatography-electrospray ionization quadrupole time-of-flight mass spectrometry (HPLC-ESI-Q-TOF/MS) in white and red wines. Affecting variables, including extraction solvent, salt concentration, ultrasound-vortex conditions and ethanol content, were evaluated. Under optimized conditions, the limit of detection (LODs) for SCCPs and MCCPs were in the range of 0.15–3.00 ng mL −1 and 0.08–2.50 ng mL −1 , respectively. The spiked recoveries of SCCPs and MCCPs from white and red wine ranged from 63.2% to 127%. The method is precise with intra- and inter-day variations within 14.0% and 17.0%, respectively. SCCPs and MCCPs in wines from china varied widely, from
研究领域:
分析化学
·
食品安全
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）