JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Tianxiang Sun,Kai Jin,Wei Wang,Wen Li,Tong Wang,Tengxun Yang,Jia Cheng,Zhipeng Zhao,Shougang Chen
Here, a long-term anti-corrosive epoxy (EP) coating based on nano-hybrid filler was developed. The surface of graphene oxide (GO) was aminated with (3-aminopropyl) triethoxysilane (APTES), and then the porous covalent organic framework (COF) was in-situ grown on amino functionalized graphene oxide (FGO) nanosheets by Schiff-based reaction to prepare FGO-COF nanofillers. Different characterization methods proved the successful modification of GO nanosheets with COF particles. The excellent water resistance of composite coatings was characterized through contact angle, adhesion, and water uptake tests. Transmission electron microscope (TEM) and molecular dynamics (MD) methods showed that the grafting of COF enhanced the dispersion and compatibility of GO in the coating. EIS measurements, salt spray analysis and cathodic delamination test indicated the significant improvements in the protective properties of the composite coatings compared with pure EP coating. The low-frequency impedance modulus of 1% FGO-COF composite coating reached higher than 6.8 × 10 9 Ω·cm 2 after immersed in sea water for 60 days. In addition, the 1% FGO-COF composite coating performed only 34% delamination ratio after 120 h cathodic delamination test.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Li Chen,Rui Cui,Jiangdong Dai,Yi Wang,Jianming Pan
The treatment of radioactive contaminated water is highly valued all over the world nowadays. In this article, an easy-operated strategy with clear principle for the efficient purification of radioactive iodide wastewater was proposed. Silver nanoparticles (Ag NPs) were grown in-situ at the oxygen-containing defect sites on the edge of GO nanosheets, and the nanocomposites were tested for both adsorption and membrane filtration. HRTEM and XRD results confirmed the crystalline structure of Ag and AgI before and after the adsorption. Fast adsorption equilibrium of iodides was observed within 15 min, and theoretical maximum equilibrium capacity was calculated as high as 150.17 mg g −1 . Dead-end filtration performances of this Ag-GO stacked membranes were further studied from the view of avoiding secondary radionuclides pollution caused by the difficult recovery of nano powders. The rejection ratio of iodides kept constant which was higher than 90 % during the first thirty minutes. AgI precipitation adsorption and size sieving of confined GO interlayers by the stacked Ag-GO membranes happened simultaneously. Suitable concentration of NaOH can wash out most of the iodide ions entrapped between the confined GO interlayers, and desorb part of the AgI meanwhile. All these results elucidated the application of these Ag-GO NPs for the fast and efficient adsorption of iodides are the most prominent advantage, and the adsorbents exhibited desired adsorption irreversibility. Ag-GO filtration membranes could help these nano powders get an easy solid–liquid separation step.
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2023
·Vol. 9
·期 5
·419
·
IF 4.6
Zetian Zhao,Lina Zhang,Yinghu Song,Lichun Ma,Jialiang Li,Min Zhao,Xueliang Ji,Jianfei Gao,Guojun Song,Xiaoru Li
Graphene oxide aerogel (GOA) has wide application prospects due to its low density and high porosity. However, the poor mechanical properties and unstable structure of GOA have limited its practical applications. In this study, polyethyleneimide (PEI) was used to graft onto the surface of GO and carbon nanotubes (CNTs) to improve compatibility with polymers. Composite GOA was prepared by adding styrene-butadiene latex (SBL) to the modified GO and CNTs. The synergistic effect of PEI and SBL, resulted in an aerogel with excellent mechanical properties, compressive resistance, and structural stability. When the ratio of SBL to GO and GO to CNTs was 2:1 and 7:3, respectively, the obtained aerogel performance was the best, and the maximum compressive stress was 784.35% higher than that of GOA. The graft of PEI on the surface of GO and CNT could improve the mechanical properties of the aerogel, with greater improvements observed with grafting onto the surface of GO. Compared with GO/CNT/SBL aerogel without PEI grafting, the maximum stress of GO/CNT–PEI/SBL aerogel increased by 5.57%, that of GO–PEI/CNT/SBL aerogel increased by 20.25%, and that of GO–PEI/CNT–PEI/SBL aerogel increased by 28.99%. This work not only provided a possibility for the practical application of aerogel, but also steered the research of GOA in a new direction.Keywords:synergistic effect;mechanical properties;graphene oxide aerogel;polyethyleneimide;styrene-butadiene latex
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Chun Feng,Lijuan Zhu,Yaqiong Cao,Yin Di,Zongxue Yu,Guhui Gao
This study reports a new strategy for enhancing the anti-corrosion properties of epoxy coatings. For this purpose, beta-cyclodextrin-graphene oxide (β-CD-g-GO) nanosheets were synthesized via anchoring beta-cyclodextrin on a graphene oxide surface in the presence of 3-glycidoxypropyltrimethoxysilane (KH560). The structure of the material was characterized by SEM, EDX, XRD, FT-IR and TGA. The inclusion of 2 wt. % GO and β-CD-g-GO nanosheets in epoxy resin remarkably enhanced the corrosion protection performance of the material relative to that of pure epoxy coating. Electrochemical impedance spectroscopy (EIS) measurements revealed that the impedance of the epoxy coating was improved after the addition of 2 wt. % GO and β-CD-g-GO nanosheets. The most pronounced improvement in the properties of the epoxy coating was obtained using β-CD-g-GO nanosheets. Scratches tests confirmed the reduced steel substrate corrosion in the case of epoxy coating that included β-CD-g-GO nanosheets compared to the corrosion obtained for other samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Lu-Qing Xie,Sui Peng,Ya-Nan Xin,Bo Liu,Xin-Yu Jiang,Jin-Gang Yu
A novel 3-dimensional graphene oxide/2-mercaptothiazoline (3D GO-MT) aerogel was prepared by using GO and MT which contains heteroatoms (nitrogen-, sulfur-) through a facile hydrothermal assembly process and a following freeze-drying technology . The effects of hydrothermal reaction temperature and GO-to-MT mass ratio on the physicochemical properties of the composites were investigated. The removal of Cu 2+ from aqueous solution by 3D GO-MT aerogels was evaluated. The results showed that the composite (GO-MT 1:3/100 °C ) with GO-to-MT mass ratio of 1:3 prepared at 100 °C had the highest adsorption capacity for Cu 2+ (0.5299 mmol g −1 ). In a bicomponent system of Cu 2+ /Pb 2+ , GO-MT 1:3/100 °C exhibited higher adsorption selectivity for Cu 2+ . And the distribution coefficients K of GO-MT 1:3/100 ° C for Cu 2+ /Y 3+ , Cu 2+ /Nd 3+ in the bicomponent systems were 0.6224 and 0.1253, respectively. The morphology and composition of GO-MT 1:3/100 °C , as well as the adsorption mechanism for Cu 2+ were investigated by scanning electron microscopy, Brunauer-Emmett-Teller, elemental analysis, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The presence of nitrogen and sulfur on MT heterocycle promoted the possible assembly of MT with GO through π-π stacking and hydrogen bonding interactions. Additionally, the existence of these heteroatoms in MT dominated the metal-chelate affinity of 3D GO-MT aerogel for selective adsorption of Cu 2+ . The fitted data of kinetics and thermodynamics showed that the adsorption process followed linear pseudo-second-order kinetics and linear Langmuir isotherm model. The adsorption process is non spontaneous and endothermic. The adsorption mechanism of GO-MT 1:3/100 °C for Cu 2+ involves coordination, cation-π electron interaction, electrostatic attraction and other intermolecular interactions. 3D GO-MT 1:3/100 °C can be used as an adsorbent material for selective adsorption/enrichment of Cu 2+ in aqueous solution.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Junyang Pan,Dan Hua,Yiping Hong,Xi Cheng,Fangsong Guo,Kok Bing Tan,Ziqi Zhong,Guowu Zhan
Photocatalytic membranes with concurrent catalytic oxidation and separating functions possess promising potentials for the degradation of organic pollutants in wastewater treatment. Herein, we designed a hybrid photocatalytic membrane ( viz. , g-C 3 N 4 /GO/MCE) by vacuum-filtration-assisted assembling method, consisting of graphitic carbon nitride (g-C 3 N 4 ) nanosheets as a top layer, graphene oxide (GO) nanosheets as an interlayer, and commercial mixed cellulose ester (MCE) as a substrate layer. The microstructures, chemical compositions, and physicochemical properties of the designed g-C 3 N 4 /GO/MCE membranes were systematically characterized by a series of characterization techniques. Particularly, photocatalysis-filtration reactor cells were designed for the evaluation of the simultaneous separation and photocatalytic degradation performance in a single unit using both organic dyes and antibiotics as modeling pollutants in wastewater. Four parameters were adopted to represent the integrated photocatalysis-filtration performance of our designed photocatalytic membranes, including permeance ( P ), rejection ( R’ , filtration alone), removal ( R , combined photocatalysis-filtration under light-irradiation), and degradation rate ( D ). The hybrid membranes showed superior permeance and solute removal under visible-light irradiation (300 W, λ > 420 nm), in which the permeance was 20% higher than that of no-irradiation conditions. In addition, 10 consecutive cycling tests and light-on/off cycles of the as-prepared g-C 3 N 4 /GO/MCE membrane toward RhB showed quite stable permeance in the range of 268.9 to 352.9 L h −1 m −2 bar −1 , and the removal was maintained in the range of 88.4% to 95.4%, indicating excellent long-term stability. Remarkably, it also exhibited good removal performance of antibiotics ( e.g. , ofloxacin, norfloxacin, sulfamethoxazole, erythromycin, and roxithromycin). Accordingly, the designed hybrid g-C 3 N 4 /GO/MCE photocatalytic membranes with excellent photocatalytic activity and photocatalysis-filtration performance are promising for wastewater treatment and water purification applications.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 19
·56198-56206
·
IF 5.8
Wang Tianshu,Shi Peibo,Wang Mingyu,Zhang Shaojun
Oily sewage discharged from ships has brought many harms to the marine environment, even endangered marine life and human life. As a new type of water treatment technology, microbial fuel cell (MFC) can efficiently treat pollutants and recover energy, which can be converted into electric energy. However, its large internal resistance restricts its development. In order to solve the problems of low power generation performance and poor biocompatibility of microbial fuel cell, a gold nanoparticle-carbon quantum dot/polydopamine/graphene oxide/bacterial cellulose (AuNP-CQD/PDA/GO/BC) electrode was prepared, and it was applied to the treatment of oily sewage from ships. Fourier transforms infrared spectroscopy, X-ray diffraction, scanning electron microscopy, gas chromatography-mass spectrometry, and contact angle measuring instrument were used to characterize the electrode. The results show that PDA bridges GO and AuNP-CQD particles through the electrostatic interaction/π-π bond/hydrogen bonding, respectively. This attracts a large number of microorganisms to attach to the surface of the porous anode material, which greatly improves the activity and quantity of microorganisms. Moreover, the maximum power density of AuNP-CQD/PDA/GO/BC electrode is 2624.91 mW/m 2 , which obviously improves the electrochemical performance of MFC. The oil content of the treated water is ≤ 15 mg/L, reaching the discharge of MARPOL 73/78 convention. Therefore, the proposed approach has paved new dimensions in not only the preparation of a new composite electrode materials but also its applications as effective degradation of ship oily sewage in MFC.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Virtual and Physical Prototyping
·
2023
·
IF 10.6
Pei Feng,Saipu Shen,Liuyimei Yang,Ye Kong,Sheng Yang,Cijun Shuai
Graphene oxide (GO) and molybdenum disulphide (MoS2), have drawn more and more attention as reinforcement in polymer. However, their large specific surface area and strong van der Waals forces result in serious aggregations in polymer matrix, which restrains the reinforcement effect. In this study, MoS2 nanosheets were in situ synthesised vertically and uniformly on the surface of GO nanosheets with the help of a hexadecyl trimethyl ammonium bromide (CTAB) assisted hydrothermal process to facilitate their dispersion in polylactic acid (PLLA) scaffold manufactured via selective laser sintering (SLS). The experimental results revealed that the 1.5 wt% GO/MoS2 nanocomposite exhibited better dispersion state compared with the 1.5 wt% GO and 1.5 wt% MoS2 in PLLA matrix. Therefore, the PLLA scaffold loading 1.5 wt% GO/MoS2 presented 10.2 and 1461 MPa of tensile strength and modulus with enhancement of 61% and 58%, respectively, compared with the pure PLLA scaffold. The reinforcement mechanisms mainly included crack deflection, crack bridging, crack pinning and pulling out of GO/MoS2. What’s more, the GO/MoS2-PLLA scaffold possessed benign cytocompatibility for cell behaviour, suggesting hopeful applications in bone defect repair.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2019
·Vol. 319
·期 3
·737-748
·
IF 1.186
Feng Sheng,Ni Ziqiu,Feng Shanshan,Zhang Zhihui,Liu Shuguang,Wang Runbai,Hu Jiawei
In this study, the UiO-66/Fe 3 O 4 /GO composite was prepared by one step method for removal of cesium ions (Cs + ) in water and exhibited excellent adsorption capacity for Cs + (62.07 mg g −1 ), which can be attributed to the size compatibility of nanosized cavities and the addition of GO. As supporting matrix, GO decreased particle aggregation and increased the surface area of the adsorbent. The composite had good acid and alkali resistance, thermal stability, rapid adsorption rate and can be separated from water by magnetic separation rapidly.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Malik Saddam Khan,Hafsa Ameer,Asghar Ali,Wenjuan Zhu,Xiaojian Li,Lei Yang,Huan Wang,Ruiqing Feng,Qin Wei
A label-free electrochemiluminescence (ECL) sensor having high sensitivity was operated for detection of prostate specific antigen (PSA) by using silver/silver orthophosphate/graphene oxide composites (Ag/Ag 3 PO 4 /GO) as antibody carriers and sensing platform. Firstly, nanoparticles of Ag 3 PO 4 were employed as luminescent materials for solid-state ECL detection and to propose possible luminescence route in this study. GO, having the ultrahigh specific surface area and superior conductivity, was utilized as a loading matrix for nanoparticles of Ag 3 PO 4. It was employed not only to contribute for the enhancement of electrons transfer for the whole ECL system, but also further improvement of the sensitivity of the immunosensor. Given that the spectacular biocompatibility of silver nanoparticles (Ag NPs) was used to immobilize PSA antibody (anti-PSA) via the covalent coupling between silver and amino group, to improve immunosensor sensitivity. The proposed sensing platform presented tremendous cathodic ECL performance and better response to the PSA. Under optimized experimental conditions, the proposed immunosensor displayed a calibration range of 0.001–80 ng/mL and low detection limit of 0.3 pg/mL (S/N = 3) for PSA determination. Featuring encouraging selectivity, repeatability, and stability, the fabricated Ag/Ag 3 PO 4 /GO is anticipated to glare novel ECL biosensor platform for PSA and other biomarkers detection in the real sample.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 12
·11754-11766
·
IF 2.8
Dong Hao,Yin Yongyuan,Guo Xuetao
Ag/Bi 2 WO 6 /graphene oxide composite with excellent photocatalytic properties was successfully prepared by hydrothermal-photoreduction synergistic method and is applied in antibiotics degradation. The structure and properties of as-prepared photocatalysts were characterized by Fourier infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS), specific surface area analyzer (BET), scanning electron microscopy (SEM), X-ray diffraction (XRD), and atomic force microscope (AFM). The results indicated that Ag and Bi 2 WO 6 were uniformly loaded on the surface of graphene oxide. In addition, graphene oxide with conjugated carbon network structures has been applied as a photocatalyst supporter for the high electronic conductivity and the large reactive sites. Compared with the pure graphene oxide, the as-prepared Ag/Bi 2 WO 6 /graphene oxide catalyst exhibited excellent degradation efficiency and stability for degrading tylosin under Xe lamp irradiation. Under simulated sunlight irradiation, the photodegradation efficiency of tylosin by Ag/Bi 2 WO 6 /graphene oxide achieved at 98% within 2 h, compared to 50% by pure graphene oxide. The excellent photodegradation ability is caused by the synergetic effect of Ag, Bi 2 WO 6 , and graphene oxide nanoparticles.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2018
·
IF 3.609
Ying Gong,Wenying Zhou,Zijun Wang,Li Xu,Yujia Kou,Huiwu Cai,Xiangrong Liu,Qingguo Chen,Zhi-Min Dang
In this work, graphene oxide (GO) nanosheets with surface modification by Tannic and Fe coordination complexes (TA-Fe) were incorporated into poly(vinylidene fluoride) (PVDF) to prepare high constant but low loss polymer nanocomposites , and the effect of TA-Fe interlayer on dielectric properties of the GO@TA-Fe/PVDF nanocomposites was investigated. The results indicate that the dosage, mixing ratio, and reaction time of TA-Fe complexes have obvious influences on the dielectric properties of the nanocomposites. Furthermore, the TA-Fe interlayer significantly influences the electrical properties of GO@TA-Fe nanoparticles and their PVDF composites, and the GO@TA-Fe/PVDF composites exhibit superior dielectric properties compared with raw GO/PVDF. Dielectric losses of the GO@TA-Fe/PVDF are significantly suppressed to a rather low level owing to the presence of TA-Fe layer, which serves as an interlayer between the GO sheets, thus preventing them from direct contacting with each other. Additionally, the dynamic dielectric relaxation of the GO/PVDF and GO@TA-Fe/PVDF nanocomposites was investigated in terms of temperature.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）