Analytical Methods
·
2021
·Vol. 13
·期 19
·2209-2214
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IF 2.896
Yuan Yao,Guoming Xie,Xin Zhang,Jinshan Yuan,Yulei Hou,Hui Chen
Biosensors based on nanomaterials are becoming a research hotspot for the rapid detection of pathogenic bacteria. Herein, a “turn-on” fluorescent biosensor based on a FRET system was constructed for the fast detection of a representative pathogenic microorganism, namely, E. coli, which causes most urinary tract infections. This biosensor was constructed by utilizing synthesized UCNPs as fluorescent donors with stable luminescence performance in complex biological samples and GO@Fe3O4 as a receptor with both excellent adsorption ability and fluorescence quenching ability. A specific ssDNA selected as an aptamer which could recognize E. coli was immobilized on the UCNPs to form UCNP-Apt nanoprobes. The nanoprobes were adsorbed on the surface of GO@Fe3O4 through the π-stacking interactions between aptamers and GO. In the presence of E. coli, UCNP-Apt nanoprobes detached from GO@Fe3O4 due to the specific recognition of aptamers and bacteria, resulting in obvious fluorescence recovery, and the concentration of bacteria was positively correlated with the intensity of the fluorescence signal; such a “turn-on” signal output mode ensures excellent precision. In addition, the easy magnetic separation of GO@Fe3O4 simplifies the operation process, helping the sensor detect bacteria in 30 minutes with a linear range from 103 to 107 CFU mL−1 and a limit of detection of 467 CFU mL−1. Moreover, recovery test results also showed that the sensor has clinical application potential for the rapid detection of pathogenic microorganisms in complex biological samples.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2020
·
IF 6.444
Neng-Jian Huang,Qiao-Qi Xia,Zhao-Hui Zhang,Li Zhao,Guo-Dong Zhang,Jie-Feng Gao,Long-Cheng Tang
A flame-retardant graphene oxide (GO) based nanocomposite paper was prepared for efficient fire alarm response via a one-step and green 3-mercaptopropyltrimethoxysilane (MPTS) functionalization process. Such MPTS modification not only improves thermal stability and flame resistance of GO network, but produces ultra-fast flame detection and efficient fire early warning response. Typically, the MPTS-GO-10 wt% paper shows a flame detection response signal of about 1.0 s and improved fire early warning response time at a relatively temperature of 200 °C. The structural observation and analysis suggest that the thermal reduction behavior of GO network can be promoted by the sulfydryl groups of MPTS molecules at high temperature, thus producing the rapid and sensitive transition of electrical resistance form insulating GO into conductive reduced GO network. The MPTS functionalization developed here show promising to tailor fire early warning response of flame-retardant GO based fire alarm sensor for potential fire safety and prevention applications.
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CHEMOSPHERE
·
2019
·
IF 5.108
Yahui Shi,Jinhui Huang,Guangming Zeng,Wenjian Cheng,Jianglin Hu,Lixiu Shi,Kaixin Yi
Photocatalytic membranes (PMs), coupling of membrane filtration and photocatalysis , have exhibited the potential for application in the wastewater treatment . In this study, we firstly adopted the supramolecular aggregates of melamine (M), cyanuric acid (C), and urea (U) in specific dimethyl sulfoxide (DMSO) as precursors to prepare carbon nitride MCU-C 3 N 4 with high photocatalytic performance, and a kind of novel-designed photocatalytic membrane was prepared via filtrating the mixture of graphene oxide (GO) nanosheets and MCU-C 3 N 4 on PVDF membrane supports, and then crosslinked using glutaraldehyde (GA) to construct a steady coating on the GO/MCU-C 3 N 4 /PVDF membrane. GO/MCU-C 3 N 4 /PVDF composite membrane exhibited higher permeation flux than that of GO/PVDF membrane and exhibited excellent separation performance for oil-in-water emulsion. A visible light-driven self-cleaning four-stage filtration by a self-built dead-end filtration system was carried out to evaluate membrane antifouling property, and GO/MCU-C 3 N 4 /PVDF membrane (M2) possessed higher flux recovery ratio (FRR) (∼92.36%) and lower irreversible fouling resistance (R ir ) ratio (∼8%) under 30min visible-light irradiation, maintaining relatively higher FRR (>72%) during 4 cycling of four-stage filtrating experiments. GO/MCU-C 3 N 4 /PVDF PMs are equipped with high permeation flux, separation performance, anti-fouling property and stability, indicating potential application in water treatment .
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DESALINATION
·
2025
·
IF 9.8
Yilin Wu,Yanke Xu,Faguang Ma,Jingjing Zhen,Yue Li,Fanlei Kong,Ming Yan
In this study, modified hollow e-ZIF-8 nanoparticles with a hollow structure and hydroxyl-rich surface were ingeniously synthesized through a one-step etching method, thereby increasing the contact area and addressing the issue of stacking imprinting sites, fundamentally enhancing selectivity. Among these, the hollow structure of the e-ZIF-8 nanoparticles not only increased the interlayer spacing of the graphene oxide (GO) nanosheets, providing additional pathways for water molecules, but also, through π-π interactions, cross-linked the phenol-modified nanoporous metal-organic frameworks (MOFs) with the GO nanosheets, significantly enhancing the structural stability and anti-fouling capability of the composite membrane. The effects of different e-ZIF-8 addition amounts on membrane flux and hydrophilicity were investigated, constructing a GO-based imprinting structure on the stacked e-ZIF-8/GO nanosheet surfaces, offering a novel strategy to improve the selectivity and stability of the membrane. The maximum adsorption capacity of e-MG-IMs reached 38.35 mg g −1 , demonstrating good selective separation factors ( α RBV/ACV = 3.24, α RBV/AZT = 2.41 and α RBV/LAM = 4.21), as well as excellent permeation selectivity ( β ACV/RBV = 4.75, β AZT/RBV = 4.42 and β LAM/RBV = 5.92). In this study, the optimized regulation of GO nanosheets extended the molecular transport channels, facilitating the construction of more molecular recognition sites, thus positively impacting the separation performance of the imprinting membrane.
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Nanomaterials
·
2022
·Vol. 12
·期 22
·3931
·
IF 5.719
Weikai Sun,Hongxiang Ou,Ziwei Chen
Adsorption is one of the effective methods of treating dye wastewater. However, the selection of suitable adsorbent materials is the key to treating dye wastewater. In this paper, GO−ATP was prepared by an intercalation method by inserting graphene oxide (GO) into the interlayer of alabaster attapulgite (ATP), and GO−ATP@CS−PVA aerogel was prepared by co−blending−crosslinking with chitosan (CS) and polyvinyl alcohol (PVA) for the adsorption and removal of crystalline violet dye from the solution. The physicochemical properties of the materials are characterized by various methods. The results showed that the layer spacing of the GO−ATP increased from 1.063 nm to 1.185 nm for the ATP, and the specific surface area was 187.65 m2·g−1, which was 45.7% greater than that of the ATP. The FTIR results further confirmed the success of the GO−ATP intercalation modification. The thermogravimetric analysis (TGA) results show that the aerogel has good thermal stability properties. The results of static adsorption experiments show that at 302 K and pH 9.0, the adsorption capacity of the GO−ATP@CS−PVA aerogel is 136.06 mg·g−1. The mass of the aerogel after adsorption−solution equilibrium is 11.4 times that of the initial mass, with excellent adsorption capacity. The quasi−secondary kinetic, Freundlich, and Temkin isotherm models can better describe the adsorption process of the aerogel. The biobased composite aerogel GO−ATP@CS−PVA has good swelling properties, a large specific surface area, easy collection and a low preparation cost. The good network structure gives it unique resilience. The incorporation of clay as a nano−filler can also improve the mechanical properties of the composite aerogel.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Yongping Ma,Aihao Xu,Xiaolei Yu,Fan Liu,Yankai Zhang,Jitong Wang
The commercialization of lithium–sulfur (Li–S) batteries faces significant challenges due to the shuttle effect of lithium polysulfides and sluggish reaction kinetics. To address these issues, a Mo2C-GO-NC interlayer, decorated with bifunctional Mo2C–N binding sites, is successfully synthesized via a facile one-step complexation method. The combination of transition metal molybdenum and nitrogen doping endows the reduced graphene oxide with a unique porous structure, strong chemisorption capabilities, and exceptional catalytic conversion properties. The Mo2C-GO-NC interlayer effectively traps lithium polysulfides and accelerates their conversion, as confirmed by theoretical calculations and in situ Raman spectroscopy. These studies reveal that the bifunctional Mo2C–N sites promote uniform Li2S deposition and enhance Li+ migration, significantly improving the reaction kinetics. As a result, the Li–S cells assembled by the Mo2C-GO-NC-modified separator exhibit a high initial capacity of 906.1 mAh g–1 at 1 C with a capacity decay rate of only 0.032% per cycle. In addition, a discharge capacity of 832.2 mAh g–1 was still exhibited after 110 cycles at a high sulfur loading of 5 mg cm–2. This work offers a strategic approach for designing advanced interlayers with bifunctional binding sites, paving the way for high-performance Li–S batteries.
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MEASUREMENT
·
2024
·
IF 5.2
Bin Yin,Zhuxuan Jiang,Shilin Liu,Guofeng Sang,Yanzhi Lv,Muguang Wang,Shiying Xiao,Beilei Wu,Qichao Wang,Li Pei,Songhua Wu
A composite Fabry-Perot (F-P) fiber optic sensor based on the vernier effect is fabricated, and experiments confirmed that it can be used to simultaneously measure underwater temperature and pH. The fiber optic sensor fabricated with single mode fiber (SMF) − multi mode fiber (MMF) − seven core fiber (SCF) − quartz capillary tube (QCT) − no core fiber (NCF) structures has contained a silane coupling agent-polyvinyl alcohol/graphene oxide (SCA-PVA/GO) hybrid multilayer film to enhance the sensor performance. Two types of sensors are fabricated, one with a plane end face and another with a tapered end surface, which named as sensor 1 and sensor 2, respectively. Their performance are experimentally demonstrated. Within the temperature range of 15°C-35°C and the pH range of 7.55–9.21, the sensitivities of sensor 1 to temperature and pH are 82.94 pm/°C and 1.16 dB/pH, while the corresponding values of sensor 2 are 39.26 pm/°C and 0.4 dB/pH. Experimental results demonstrated that the sensitivities of sensor 1 to temperature and pH are higher than that of sensor 2. But compared with sensor 2, sensor 1 has higher values of crosstalk and random error. By contrast, sensor 2 maintain a good linear relationship with the environmental dual parameters, allowing for the simultaneous measurement of underwater temperature and pH. Moreover, both sensors demonstrate good stability and reversibility when the temperature and pH are varied. Furthermore, the pH response times of the two sensors are less than 0.5 s, with a recovery time of 2 s. Thus, the proposed sensors with outstanding stability, reversibility, repeatability, and rapid response times will have a broad range of applications in the fields of marine environment monitoring, water quality detection, and food and medical device safety testing.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Rutong Song,Yurong Wu,Fei Zhong,Chunlin Chen,Zhikui Huang,Yaqi Ren,Wei Li,Jie Cao,Yichao Ding
Cu-doped PDA and PA were grafted onto GO to form a P-N-rich barrier (GPCu/PA). • Co-Fe/B nanosheets were grown on GPCu/PA to construct a hierarchical structure. • Multi-metal (Cu, Co, Fe) and boron synergistically enhance char formation and stability. • The hierarchical filler provides physical barrier, radical quenching, and catalytic charring. Water-based intumescent epoxy coatings for steel structures face challenges in simultaneously achieving high-efficiency flame retardancy, smoke suppression, thermal insulation, and long-term environmental durability. In this study, a hierarchical GPCu/PA/Co-Fe/B hybrid flame retardant was developed by sequentially grafting Cu 2+ -chelated polydopamine (PDA) and phytic acid (PA) onto graphene oxide (GO), followed by the in situ growth of Co-Fe/B nanosheets. This ingeniously designed structure integrates the layered barrier effect of GO, the catalytic charring capability of PDA and transition metal species, the phosphorus-promoted expansion effect of PA, and the protective effect of boron-containing compounds. Through these synergistic effects, the hybrid system facilitates the formation of a dense and stable char layer, thereby effectively suppressing heat conduction, oxygen diffusion, and the release of flammable volatiles during combustion. When incorporated into water-based epoxy coatings, just 2 wt% of GPCu/PA/Co-Fe/B significantly improves flame-retardant performance by reducing the back-surface temperature by 36.3%, increasing the char layer expansion height by 244.9%, and enhancing smoke suppression capabilities. The cone calorimeter test further confirmed the reduced heat release, smoke generation, and toxic gas emissions achieved by this coating, demonstrating its outstanding fire safety performance. Additionally, water immersion and UV-accelerated aging tests showed that even after environmental exposure, the coating maintained low water absorption, structural integrity, and flame-retardant properties, indicating excellent durability and weather resistance. This study provides a highly promising strategy for developing multifunctional, tiered flame-retardant systems for durable water-based intumescent coatings designed for fire protection of steel structures. Download: Download high-res image (370KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Dongting Huang,Huixin You,Lirong Chen,Yongjing Liu,Hua Li
This study extends the development of a Graphene oxide@Zirconium-based metal-organic framework@Deep eutectic solvents (GO@MOF-808@DESs) through hydrothermal self-assembly using zirconium chloride and 1,3,5-benzenetricarboxylic acid (H 3 BTC), subsequently functionalized with four carbon-tailored fatty acid-based deep eutectic solvents (DESs) via ultrasonic impregnation. Comprehensive characterization of GO@MOF-808@DES confirmed the successful surface modification via DES. A dispersive micro-solid phase extraction(D-μSPE) method was established employing GO@MOF-808@DESs as an adsorbent for efficient removal of residual entacapone (ETCP) and tolcapone (TCP) from water. Optimization of the D-μSPE method revealed optimal conditions at pH 9.0, with a sample volume of 40 mL, an adsorbent dosage of 20 mg, and an adsorption time of 60 min. Under these conditions, the method achieved a significant adsorption capacity of 86.50 ± 4.79 mg/g for ETCP and 126.21 ± 2.72 mg/g for TCP. Mechanistic investigation revealed chemically dominated adsorption kinetics through pseudo-second-order modeling and Langmuir isotherm fitting. Concurrently, density functional theory (DFT) studies demonstrated that the synergistic effect between carboxyl-mediated hydrogen bonding and hydrophobic interactions led to enhanced adsorption performance. The engineered GO@MOF-808@DESs based D-μSPE method demonstrated superior performance in removing ETCP and TCP from river water matrices, achieving 99.67 % and 99.24 %, respectively. Meanwhile, a sensitive and reliable method for trace-level monitoring of ETCP and TCP residues in environmental waters was successfully proposed, employing GO@MOF-808@DESs-based D-μSPE coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS). This study presents a robust strategy for fabricating high-performance GO@MOF-808@DESs composite materials, demonstrating significant potential for practical applications.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 34
·16022-16029
·
IF 3.3
Xingguo Deng,Jingchao Li,Bo Zhao,Zhihua Li
In this study, a silver metal–organic framework (Ag-MOF) was immobilized on graphene oxide (GO) sheets via an ultrasonication process. The Ag-MOF@GO composite showed enhanced physicochemical properties, including an improved surface area and lower agglomeration, as confirmed using characterization techniques such as X-ray diffraction (XRD), the Brunauer–Emmett–Teller (BET) method, and scanning electron microscopy (SEM). Malachite green (MG) is a typical cationic dye, which can be toxic, cause environmental damage and threaten human health. Therefore, the adsorption capacities of Ag-MOF and Ag-MOF@GO for the MG dye were also evaluated at room temperature. Kinetic analysis revealed a significant increase in the adsorption capacity and rate of adsorption of Ag-MOF@GO compared with Ag-MOF. The addition of GO increases the surface area of Ag-MOF@GO and reduces the agglomeration effect, resulting in an improved adsorption capacity. Ag-MOF@GO showed a greater than 90% regenerability after three cycles.
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Polymers
·
2022
·Vol. 14
·期 3
·621
·
IF 4.967
Han Wu,Jia Shi,Xin Ning,Yun-Ze Long,Jie Zheng
A simple and novel strategy of superhydrophilic-superhydrophobic Janus membrane was provided here to deal with the increasingly serious oil-water separation problem, which has a very bad impact on environmental pollution and resource recycling. The Janus membrane of cPVA-PVDF/PMMA/GO with opposite hydrophilic and hydrophobic properties was prepared by layer-by-layer electrospinning. The structure of the Janus membrane is as follows: firstly, the mixed solution of polyvinylidene fluoride (PVDF), polymethylmethacrylate (PMMA) and graphene oxide (GO) was electrospun to form a hydrophobic layer, then polyvinyl alcohol (PVA) nanofiber was coated onto the hydrophobic membrane by layer-by-layer electrospinning to form a composite membrane, and finally, the composite membrane was crosslinked to obtain a Janus membrane. The addition of GO can significantly improve the hydrophobicity, mechanical strength and stability of the Janus membrane. In addition, the prepared Janus membrane still maintained good oil-water separation performance and its separation efficiency almost did not decrease after many oil-water separation experiments. The flux in the process of oil-water separation can reach 1909.9 L m−2h−1, and the separation efficiency can reach 99.9%. This not only proves the separation effect of the nanocomposite membrane, but also shows its high stability and recyclability. The asymmetric Janus membrane shows good oil-water selectivity, which gives Janus membrane broad application prospects in many fields.Keywords:oil-water separation;Janus membrane;electrospun nanofiber;superhydrophobic
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2023
·
IF 6.8
Qian Ye,Hanbin Wu,Jin Li,Yinyin Huang,Mingliang Zhang,Qianqian Yi,Bin Yan
Anthraquinone is a redox mediator that can effectively catalyze the degradation of azo dyes by promoting the electron transfer. In this study, a mediator membrane with poly (vinylidene fluoride) (PVDF) as the membrane support and 1,8-dichloroanthraquinone (1,8-AQ) and graphene oxide (GO) as the additives was prepared and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP), atomic force microscopy (AFM) and water contact angle. The introduction of GO increases the pure water flux of the membrane to 258.56 ±12.93 L/(m 2 ·h). Its catalytic performances for the biodegradation of azo dyes were evaluated. Under the optimized conditions, the 1,8-AQ/GO/PVDF composite membrane is able to improve the dye degradation efficiency 2.2 times for reactive red X-3B and 1.1 times for acid red B, as compared with PVDF membrane. In addition, the mediator membrane maintains stable and high catalytic efficiency in the cyclic test and over 90 % dye degradation efficiency is still obtained after 5 cycles of decolorization. These results suggest the great application potentials of the 1,8-AQ/GO/PVDF membrane in the dye wastewater treatment.
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危险品化学品经营许可证（带存储）