SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Chuanmin Ding,Xue Wang,Kaijing Song,Bing Zhang,Junwen Wang,Zhihuan Zhao,Honghong Chang,Wenlong Wei
Herein visible light was utilized as activator to enable colorimetric immunoassay to detect tumor marker based on ternary GO-C 3 N 4 -AgBr heterojunction nanophotocatalyst. Firstly, synthesized photocatalyst GO-C 3 N 4 -AgBr could oxidize TMB due to photogenerated hole and the oxidation ability was enhanced due to ternary heterojunction structure. Secondly, depending on the specific binding of antigen and antibody, the sandwich-type immunocomplex were constructed on the platform of magnetic bead with advantages of convenient cleaning and easy separation. Finally, TMB was added into the ABS buffer solution of immunocomplex. Under visible light radiation, fast change in color was observed within 10 s. Under optimal conditions, there was a linear relation between absorbance and target protein concentration in the range of 0.5 ng mL −1 –25 ng mL −1 with the detection limit of 20 pg mL −1 . Meanwhile, the developed colorimetric immunoassay displayed preferable selectivity, repeatability, and stability.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Mingyan Chen,Jie Chen,Yucheng Liu,Jie Liu,Lingli Li,Bing Yang,Lili Ma
A new type of metal organic framework GO/Ni-MOF-199 was synthesized using the solvothermal method in combination with different amounts of graphene oxide (0%, 0.5%, 1.75% and 5%) in order to remove thiophene from model oil. The adsorption desulfurization performance was tested by removing thiophene from the n-octane/thiophene model oil. The thermal stability of composites is improved by modification. Adsorption capacity of MOF-199 was enhanced by doping Ni 2+ and graphene oxide (GO) with appropriate content. Bimetallic ions combine with the oxygen-containing function of GO to form a stronger synergistic effect. The synthesized samples are characterized using XRD , SEM, FTIR, BET, and TGA methods. By using the appropriate characterization methods, it is shown that an excessive GO content will damage the structures of the composites. The investigation’s results demonstrated that the maximum adsorption capacity of 1.75% GO/Ni-MOF-199 reached 50.38 mgS/g MOF at 35 ℃, and a v (oil) /m (absorbent) ratio of 150 ml/g occurred after 3.5 h of adsorption. Furthermore, the 1.75% GO/Ni-MOF-199 composites could be reused at least four times. The pseudo-second-order dynamic model and Langmuir model are more suitable to represent how the GO/Ni-MOF-199 materials adsorb thiophene from the model oil.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 86
·54898-54910
·
IF 3.108
Quanling Xie,Wenyao Shao,Shishen Zhang,Zhuan Hong,Qiuquan Wang,Birong Zeng
In this work, novel thin-film nanocomposite (TFN) nanofiltration (NF) membranes were developed through modification with maleic anhydride functionalized graphene oxide (MAH-GO) via interfacial polymerization (IP). First, MAH-GO was synthesized by linking MAH molecules to the electrophilic groups (C–OH) of GO nanosheets. The resulting materials were characterized in depth by FT-IR, TEM, SEM, AFM, XPS and Raman spectroscopy. Subsequently, the MAH-GO and GO nanosheets were individually introduced into the polypiperazine-amide (PPA) active layer of TFN NF membranes via IP between piperazine (PIP) and trimesoyl chloride (TMC). The influence of the MAH-GO or GO concentrations on the morphology and performance of TFN NF membranes was systematically investigated. Compared with TFC-blank, the TFN-MG-60 and TFN-GO-80 membranes demonstrated significantly enhanced separation performance without reduction of the salt rejection. Particularly, the water flux of TFN-MG-60 and TFN-GO-80 was found to be 49.3 L m−2 h−1 and 42.0 L m−2 h−1, respectively, corresponding to 176.7% and 150.5% of TFC-blank. Moreover, TFN-MG-60 demonstrated superior water permeability, antifouling capability and chlorine resistance to TFN-GO-80, which was attributed to the incorporation of MAH-GO nanosheets having more hydrophilic carboxyl groups. Meanwhile, TFN-MG-60 retained a high salt rejection rate of 97.6% to Na2SO4, comparable to that of TFC-blank. The MAH-GO nanosheets show great potential in developing high-performance TFN NF membranes to overcome the trade-off effect of conventional thin-film composite membranes.
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 4
·963
·
IF 5
Weijie Chen,BingBing Zhang,Sheng Wang,Bin Xue,ShiWang Liu,MingZhe An,Zhao Yang,Guomin Xu
In recent years, phase change materials (PCMs) have been widely used in waste heat utilization, buildings, and solar and wind energy, but with a huge limitation from the low thermal conductivity, photothermal conversion efficiency, and low latent heat. Organic PCMs are eyecatching because of its high latent heat storage capability and reliability, but they still suffer from a lack of photothermal conversion and sharp stability. Here, we prepared sharp-stable PCMs by establishing a carbon material frame system consisting of graphene oxide (GO) and biochar. In particular, surfactants (CTAB, KH-560 and KH-570) were employed to improve the dispersity of GO in PEG. The differential scanning calorimetry results shows that the latent heat of PEG modified by CTAB grafted GO (PGO-CTAB) was the highest (191.36 J/g) and increased by 18.31% compared to that of pure PEG (161.74 J/g). After encapsulation of PGO-CTAB in biochar, the obtained composite PCM with the amount of biochar and PGO-CTAB in weight ratio 4:6 (PGO-CTAB/CS6(6)) possesses relatively high latent heat 106.51 J/g with good leak resistance and thermal stability, and with obviously enhanced thermal conductivity (0.337 W/(m·K)) and photothermal conversion efficiency (77.43%), which were higher than that of PEG6000 (0.325 W/(m·K), 44.63%). The enhancement mechanism of heat transfer and photothermal conversion on the composite PCM is discussed.Keywords:phase change materials (PCMs);graphene oxide (GO);biochar;surfactants;thermal conductivity;the photothermal conversion efficiency
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Lili Xu,Renmin Liu,Zhaofang Li,Moju Li,Min Zhao,Yingjie Li,Guiyue Hou,Aifeng Li,Hongbo Suo
In this study, imidazolium-based ionic liquids (ILs) were used to modify carboxymethyl cellulose-coated Fe3O4 nanoparticles with graphene oxide deposition (ILs-MCMC/GO). The prepared composites were characterized and used to immobilize lipase. The prepared biocatalyst (PPL-ILs-MCMC/GO) exhibited higher activity, which was 3.55-fold that of free lipase and 1.41-fold that of immobilized lipase without IL (PPL-MCMC/GO). After reusing 10 times, the residual activity of PPL-ILs-MCMC/GO was 91.3%, which was higher than those of PPL-MCMC/GO (83.6%) and PPL-MCMC (73.6%). In addition, using kinetic analysis, we showed that the affinity between PPL-ILs-MCMC/GO and the substrate was improved. The secondary structures of free and immobilized lipase were analyzed to explain the mechanism by which the performance of PPL-ILs-MCMC/GO was improved. The introduction of imidazole-based IL was useful in improving the microenvironment of immobilized lipase. Furthermore, magnetic supports loaded with lipase could be recovered easily.
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Hao Yu,Yi He,Hongjie Li,Zhong Li,Baiyu Ren,Guanyu Chen,Xinyi Hu,Tao Tang,Yinfen Cheng,Jian Zhen Ou
Graphene oxide membranes (GOMs) have great potentials in the high-performance desalination of salty wastewater. However, the low-selectivity and fouling issues are the main obstacles to practical implementation. Although compositing with TiO 2 nanoparticles alleviates such problems by regulating membrane structures and photodegrading surface organic filter cakes, the performance is still limited by the intrinsic aggregation feature and narrow UV response range. Here, we functionalize TiO 2 nanoparticles with polypyrrole (PPy) to improve their dispersibility and visible-light-driven photodegradation properties. The as-formed core-shell heterostructures (PPy@TiO 2 ) with a large dose are intercalated into GOM, resulting in a large water flux (436.93 Lm −2 h −1 bar −1 ) and selective positive dye/negative dye separation with a maximum salt permeation of 97%. Upon the reduction of the dosage, more than 99% of dyes are separated regardless of molecule weights and surface charge polarity although the average water flux is reduced to 5.83 Lm −2 h −1 bar −1 and the salt rejection rate is increased up to 24%. In addition, the composite membrane with low-dosed PPy@TiO 2 photodegrades MB completely within 2 h, while its water permeability and dye rejection performance are maintained after a 5 h filtration process . Our work provides a facile method to develop multi-functional 2D composite membranes with controllable and stable dye desalination performances.
✓ 已验证
产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 101
·期 4
·2199-2211
·
IF 2.5
Zheng Zeng,Haikuan Yuan,Jie Lu
Graphene oxide (GO) has extensive applications in membrane-based separations, but its dispersion in the membrane has always been a problem due to the presence of π–π interactions in GO nanosheets. In this study, a grafting reaction was designed by using poly (vinyl alcohol) (PVA) for GO grafting modification and poly (vinyl alcohol)-g-graphene oxide (PVA-g-GO) nanocomposites were synthesized. The grafting material to GO was the same as the basic separation polymer material. PVA-g-GO showed better dispersibility and hydrophilicity than GO, and a series of composite membranes were prepared using a polyacrylonitrile (PAN) ultrafiltration (UF) membrane as a substrate. PVA-g-GO nanocomposites and membranes were characterized by using X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), water contact angle, scanning electron microscopy (SEM), etc. The addition of PVA-g-GO improved both the separation performance and anti-swelling property of the composite membrane, and the PVA-g-GO/PVA/PAN composite membrane loaded with 2 wt.% PVA-g-GO obtained a high flux of 4.46 kg/m 2 · h and a high rejection of 99.99% when dehydrating 3.5 wt.% NaCl solution at 30°C by pervaporation.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Rongguan Lv,Huayu Wu,Zhouheng Jiang,Anyu Zheng,Haiyan Yu,Ming Chen
A highly flexible hydrogel cathode applied in rechargeable aqueous zinc-ion batteries (ZIBs) fabricated by polyvinyl alcohol (PVA), vanadium pentoxide (V 2 O 5 ) and graphene oxide (GO) has been successfully synthesized by repeated freeze-thaw method. The V 2 O 5 /GO hydrogel (VOGH) presented complex 3D cross-linking system and excellent flexibility through hydrogen bonding and inorganic nanosheets reinforcement. The mechanical and electrochemical properties of VOGH are balanced and achieved by adjusting the content of GO (5%), V 2 O 5 (30%), PVA (25%) and water (40%) of the total mass, respectively. From the electrochemical result, the flexible hydrogel cathode displayed a high capacity (240.5 mA h g –1 ) and a good cyclic stability after 200 cycles at 1 A g –1 . Moreover, the electrochemical kinetics exhibite the capacitive control process, which confirm the excellent ion transport to enhance storage performance of ZIBs. The soft package ZIBs using VOGH as cathode and Zn foil as anode display good cycle performance (191.7 mA h g –1 at 1 A g –1 after 1000 cycles) and provide stable power supply at different bending angles.
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2021
·Vol. 16
·期 20
·3141-3150
·
IF 4.568
Haoyu Wang,Jing Zheng,Jing Zhao,Wanqin Jin
Graphical Metal ions are successfully incorporated into GO channels , which contribute to facilitating CO 2 transport, decreasing N 2 solubility, hindering N 2 diffusion, and form multiple interactions with GO nanosheets, thus achieving the remarkably improved CO 2 /N 2 separation performance (with separation factor increasing 12.2 times) and excellent long-term stability. Graphene oxide (GO) membranes holds great potential for high-performance CO 2 capture. Aiming at enhancing the CO 2 separation performance and structural stability of GO membranes, functionalizing GO channels with metal ions confers a promising strategy. In this study, we reported the fabrication of metal ion-incorporated GO membranes with remarkably improved CO 2 /N 2 separation performance. The metal ions within GO channels contribute to facilitating CO 2 transport, decreasing N 2 solubility, hindering N 2 diffusion, and form multiple interactions with GO nanosheets. After introducing Mg 2+ ions, the CO 2 /N 2 separation factor of GO membrane is remarkably increased from 4 to 48.8 with the CO 2 permeance increases 1.5 times. Moreover, the separation performance of the GO-Mg 2+ membranes shows an excellent long-term stability owing to the structural robustness. This study could provide insights into the regulation of the microstructure of metal ion-functionalized GO membranes for highly selective transport of specific molecules.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Bin Zhan,Yan Liu,Wen-Ting Zhou,Shu-Yi Li,Zhi-Biao Chen,Thomas Stegmaier,Maryam Aliabadi,Zhi-Wu Han,Lu-Quan Ren
Oily wastewater causes serious pollution to the environment and has aroused widespread concern. Herein, non-toxic, environmentally friendly, multi-functional superwetting GO/g-C 3 N 4 /TiO 2 (GCT) foam was prepared via hydrothermal treatment and freeze-drying methods. The as-prepared GCT foam could simultaneously separate oil–water mixtures and adsorb water-soluble organic dyes, both the separation efficiency and adsorption efficiency are higher than 98%. In addition, the GCT foam have the ability to separate various oil-in-water emulsions with separation efficiency of higher than 99%. Meanwhile, the as-prepared GCT foam was able to degrade oil pollution and showed excellent antioil-fouling capability. The as-prepared multifunctional GCT foam is expected to have broad prospects in the treatment of oily wastewater and the adsorption of water-soluble organic pollutants, which may be providing a new strategy for the oily wastewater remediation.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2020
·
IF 6.289
Yanxuan Ma,Yingrui Zhang,Jiatong Liu,Yajie Ge,Xiaoning Yan,Yi Sun,Jian Wu,Peng Zhang
In order to achieve microcapsules' higher encapsulating capacity and better self-healing efficiency, the graphene oxide (GO)-modified double-walled Polyurea microcapsules were synthesized with 1, 6-Diaminohexane as the inner core and isophorone diisocyanate (IPDI)-based prepolymer as the outer core. Measured were the morphology, structure, thermal property and mechanical property of the microcapsules by using the Optical and Scanning Electron Microscopy (OM, SEM), Fourier transform infrared (FTIR), X-ray diffraction (XRD), Thermogravimetric analysis (TGA) and Nanoindentation tests. And the mechanical testing machine, Digital Speckle Correlation Method (DSCM) and Electrochemical Impedance Spectroscopy (EIS) measurement were used to evaluate their mechanical and anticorrosive properties. The results showed that the GO-modified microcapsules obtained possessed a good spherical shape with a mean diameter of 0.5 μm. The microcapsules with excellent thermostability containing a urea bond, the GO had been successfully embedded into the wall materials and the contents of the inner core materials and outer core materials were 26.75 wt% and 10.88 wt% respectively. The average Young's modulus, hardness and load during the holding time of the microcapsules were 2.708GPa, 0.088GPa and 28.51mN respectively. The mechanical and anticorrosive self-healing efficiency of epoxy coating with 3.0 wt% of microcapsules could gain up to 80.43% and 62.50% respectively.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 36
·18735-18744
·
IF 11.301
Junyuan Xia,Peng Xiao,Jincui Gu,Tianyu Chen,Chaohui Liu,Luke Yan,Tao Chen
Graphene oxide (GO) has superior molecular sieving abilities due to its unimpeded two-dimensional (2D) nano-channels and nacre-like lamellar structure. However, it remains a huge challenge to fully exploit its unmatched features to construct a GO-based membrane on a large scale for excellent screening performance. Here, we display a facile, ultrafast and environmentally friendly strategy to design an ultrathin (graphene/graphene oxide@polyetherimide) GR/GO@PEI composite membrane under the collective effects of a hydrophilic PEI molecular-bridge and an ordered GR/GO laminar structure. Excitingly, this composite membrane presents extraordinary structural stability, even when transferred to any given substrate, regardless of its chemical components, structure, or specification. Furthermore, this membrane shows high permeance of up to 191 L m−2 h−1 bar−1 and over 99% rejection of Congo red, far superior to the majority of GO-based separation membranes reported so far. In addition, it can withstand several types of physical damage and chemical corrosion, as well as being further able to realize the purification of actual, complex, multi-component, domestic sewage. This work will open the door to developing scalable 2D lamellar membranes with ultrafast and precise separation channels for practical water purification.
✓ 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）