JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Jinlin Hao,Qian Sun,Weijie Wang,Minqi Zhao,Huiyi Liu,Xin Sui
Energy harvesting based on salinity gradients between oceans and rivers can provide a clean, stable, and continuous electric output. However, it is highly dependent on the excellent performance of biomimetic ion-selective membranes. The graphene oxide (GO) membrane, as a 2D material-based layered-structure membrane, offers the possibility of efficient salinity gradient energy conversion. However, unstable stratification in aqueous solutions and the limited number of charged functional groups make practical applications difficult. A conventional symmetric structure will also reduce the effective salinity gradient owing to ion enrichment on the low-concentration side. In this study, we pre-modified GO to create an asymmetric ion-selective membrane with opposing charges. Hyperbranched polyethyleneimine (PEI) and polyacrylic acid (PAA) as surface charge donors and crosslinkers stabilise the interlayer spacing of GO and increase charge density, achieving up to 3.4 W/m 2 power density under sea water and river water. Furthermore, theoretical calculations show that membranes with asymmetric structure and opposite charges can eliminate the effect of ion enrichment on the low-concentration side, thereby avoiding power consumption . This system contributes to a further step toward the application of salinity energy conversion.
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高影响因子
MOLECULES
·
2019
·Vol. 24
·期 3
·522
·
IF 3.06
Hongwu Wang,Ding Wang,Liang Tian,Huijun Li,Ping Wang,Nanquan Ou,Xianying Wang,Junhe Yang
In order to obtain acetone sensor with excellent sensitivity, selectivity, and rapid response/recovery speed, graphene-like ZnO/graphene oxide (GO) nanosheets were synthesized using the wet-chemical method with an additional calcining treatment. The GO was utilized as both the template to form the two-dimensional (2-D) nanosheets and the sensitizer to enhance the sensing properties. Sensing performances of ZnO/GO nanocomposites were studied with acetone as a target gas. The response value could reach 94 to 100 ppm acetone vapor and the recovery time could reach 4 s. The excellent sensing properties were ascribed to the synergistic effects between ZnO nanosheets and GO, which included a unique 2-D structure, large specific surface area, suitable particle size, and abundant in-plane mesopores, which contributed to the advance of novel acetone vapor sensors and could provide some references to the synthesis of 2-D graphene-like metals oxide nanosheets.Keywords:ZnO/GO nanosheets;nanocomposites;acetone gas sensors;two-dimensional structure
研究领域:
材料科学
·
传感器技术
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PubMed
高影响因子
Analytical Methods
·
2013
·Vol. 5
·期 16
·3984-3991
·
IF 1.855
Miaomiao Tian,Wei Feng,Juanjuan Ye,Qiong Jia
We reported new magnetic microspheres as the adsorbent of estrogens. They were prepared by coating Fe3O4 particles with a composite made from titanium dioxide and graphene oxide (Fe3O4@TiO2/GO). The beads were loaded into a microfluidic chip and used to adsorb estrone (E1), estradiol (E2), and estriol (E3). The estrogens were then eluted from the beads with methanol and submitted to high performance liquid chromatography (HPLC) determination. Effects of sample volume, sample flow rate, sample pH value, and eluent flow rate were optimized. The limits of detection for estrogens were in the range of 4.3–7.5 ng mL−1, and recoveries ranged from 70.6% to 94.5%. Intra-day and inter-day relative standard deviations were less than 2.5% and 3.2%, respectively. The results indicated that the method was successfully applied to the determination of estrogens in milk and milk powder samples.
研究领域:
分析化学
·
环境科学
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高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Xiaoqing Zhao,Na Wang,Hou Chen,Liangjiu Bai,Hui Xu,Wenxiang Wang,Huawei Yang,Donglei Wei,Lixia Yang
In this paper, a functional nanoprobe based on graphene oxide (GO) composites was successfully prepared for detection of mercury ion (Hg(II)) with high sensitivity. GO as a substrate was modified and used for the growth of polymer chains to synthesize polyacrylonitrile-grafted GO (PAN- g -GO) by activator generated by electron transfer atom transfer radical polymerization (AGET ATRP). Under the condition of visible light shines, the PAN- g -GO was further modified to prepare [poly(acrylonitrile- co -vinyl(diphenyl pyridine))]-grafted GO (P(AN- co -PHPY)- g -GO) nanomaterial by one-step synthesis. Finally, P(AN- co -PHPY)- g -GO as a nanoprobe was dropped to the surface of the glassy carbon electrode and assembled to the electrochemical sensor . Moreover, it can effectively improve the enrichment capacity of mercury ions and increase the electron transfer rate on the electrode surface. Differential pulse anodic stripping voltammetry (DPASV) was used to evaluate the electrochemical performance. Under optimum conditions, the response of Hg(II) at this resulting sensor was linear in the range of 2.0 μM~0.1 nM with a detection limit of 0.06 nM. Additionally, this sensor showed excellent reproducibility, selectivity and stability.
研究领域:
纳米技术
·
材料科学
·
分析化学
·
环境科学
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高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Le Wang,Mengyue Zhang,Manyu Zhang,Zhongke Sun,Zifu Ni,Yanli Yin,Dapeng Wu,Qipeng Yuan
The multifunctional composites Fe 3 O 4 /GO/NH 2 -MIL-53(Fe) with excellent adsorption-degradation performance was prepared for the removal of Aflatoxin B 1 (AFB 1 ). The adsorption function of Fe 3 O 4 /GO/NH 2 -MIL-53(Fe) was based on the large specific surface area and abundant adsorption sites. The degradation function of Fe 3 O 4 /GO/NH 2 -MIL-53(Fe) was based on the activation of H 2 O 2 by the catalytic active center formed by the coordination of metal ions and oxygen-containing groups in the system, resulting in hydroxyl radicals (·OH), superoxide anion radicals (O 2- ) and singlet oxygen ( 1 O 2 ). The adsorption of nanozyme accelerated the degradation reaction process, and the adsorption site was further exposed as the degradation process progressed. The synergistic effect realized the efficient removal of AFB 1 . Construction of Fe 3 O 4 /GO/NH 2 -MIL-53(Fe) as the carbon-doped iron-based nanozyme provided novel approaches of the removal for risks control of AFB 1 . Accompanied by the AFB 1 adsorption, the advanced oxidation of nanozyme to the AFB 1 degradation provided a promising way for the synergistic removal of AFB 1 .
研究领域:
食品安全
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生物化学
·
环境科学
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PubMed
高影响因子
MATERIALS TECHNOLOGY
·
2024
·
IF 2.9
Mengcheng Xu,Maolin Zhao
Among deaths related to cardiovascular disease (CVD), arteriosclerosis accounts for three-quarters of the total. The most common treatment for arteriosclerosis is revascularization through the implantation of endovascular scaffolds. However, most metal scaffolds currently available are non-biodegradable, which can lead to rejection reactions. In this study, we have developed a CMCS-PEI/miR polysaccharide nucleic acid nanodrug loaded with miR-199a-5p for the first time. The CMCS-PEI/miR polysaccharide nucleic acid nanodrug exhibits good blood compatibility, successfully transfects cells, and induces apoptosis of vascular endothelial cells. Additionally, PCL/GO composite scaffolds with excellent mechanical properties and biocompatibility were fabricated using 3D printing technology. This technology allows for the customisation of scaffolds to meet the needs of individual patients. The 3D-printed PCL/GO composite scaffolds loaded with CMCS-PEI/miRNA polysaccharide nucleic acid nanodrug effectively induce apoptosis of vascular endothelial cells, showing great potential in promoting the functional repair of arteriosclerosis and preventing vascular restenosis.
研究领域:
心血管疾病
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生物材料学
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分子生物学
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组织工程
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 8
·3375-3387
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IF 3.134
Yu Tingting,Liu Qingsong,Gao Changfei,Yang Tao,Yang Bing,Guo Huilin,Chen Wenbin,Zhang Yu,Song Biming
By increasing the activity and specific properties of the catalyst during oxygen reduction reactions (ORR), we hope to improve fuel cell performance and energy conversion efficiency. Using a single microwave step, the graphene oxide-decorated iron phthalate catalyst (FePcNs@GO) nanocomposites were synthesised. Some analytical techniques were used to validate the morphology and composition of Fe catalyst/graphene (FePcGO) and FePcNs@GO. In an oxygen-saturated environment, we conducted the ORR electrocatalytic studies on the prepared materials. The results demonstrate that when FePcNs@GO is combined with graphene oxide, it exhibits excellent electrochemical properties. In comparison to commercial FePc and 20% Pt/C, the overpotential is significantly lower. Under nitrogen-saturated conditions, the Fe 2+/3+ redox form potential in FePcNs@GO exhibits a more positive behaviour, which favours strong interactions between Fe 2+ and O 2 . In this work, we demonstrate that platinum-free catalysts have potential applications in ORR.
研究领域:
材料科学
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电化学
·
能源转换
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高影响因子
Journal of Hazardous Materials Advances
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2021
·
IF 0
Luo Li,Yi Li,Chunhu Tan,Tingting Zhang,Xiaoli Xin,Weihua Li,Jiansheng Li,Rui Lu
The mechanism of GO/rGO interaction with trypsin is investigated using multiple methods. UV-Vis reveals that trypsin has a maximum absorption at 278 nm, the absorption intensity increased demonstrating GO/rGO alters the solvent environment of trypsin and exposes the aromatic chromogenic groups. ITC experiments with GO and trypsin provide a negative ΔH of -25.98 KJ mol −1 and the association constant Ka of 4.829 × 10 −4 . The negative ΔS of -23.64 J mol −1 ∙K −1 is further given by the Gibbs–Helmholtz equation. Combining with the ζ potential result, the driving forces for binding include hydrogen bonding, electrostatic interaction forces and van der Waals forces. Fluorescence spectroscopy shows that GO/rGO can significantly quench the fluorescence intensities of trypsin. The equilibrium constant Kd of GO/ rGO-24h / rGO-48h is 4.41±0.07, 5.82±0.53, 7.24±0.25, respectively, which means the reduced content of oxygen-containing groups can weaken the binding forces between GO/rGO and trypsin. CD show that even low concentrations of GO/rGO affect the secondary structure of trypsin, mainly decreasing the α -helix and β -fold content while increasing the β -turn and random coil content of trypsin. Overall, GO/rGO can effectively interact with trypsin, the oxidation degree of GO/rGO can affects the combination of trypsin and further influence on protein conformation and function.
研究领域:
生物化学
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分子生物学
·
蛋白质科学
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DOI
SURFACE REVIEW AND LETTERS
·
2021
·
IF 1.152
HENGXIN REN,YUSHAN QIN,YUGUANG LV
A new type of poly pyrrole/graphene oxide/bismuth vanadate (PPy/GO/BiVO 4 ) ternary nanocomposite with excellent visible light-driven photocatalytic degradation performance was prepared by the traditional hydrothermal method. The photocatalyst samples were characterized and analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and UV-vis diffuse reflectance spectroscopy (UV-vis DRS). Under visible light irradiation, the photocatalytic activity of the samples in the degradation of Rhodamine B (RhB), which was used to simulate organic dye pollutants in the real natural environment, was detected. The experimental results demonstrated that the photocatalytic degradation performance of PPy/GO/BiVO 4 was reinforced after loading GO and PPy. Among all the photocatalyst samples with different PPy content, the PPy/GO/BiVO 4 nanocomposite containing 5% PPy showed the highest photocatalytic activity. The stability test suggested that the nanocomposite remained stable even after four cycles of photocatalytic degradation of RhB. As a novel type of visible light-driven photocatalyst, PPy/GO/BiVO 4 can be utilized to degrade pollutants in waste water.
研究领域:
材料科学
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环境化学
·
纳米技术
·
光催化
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DOI
高影响因子
CARBON
·
2026
·
IF 12.7
Fei-Fei Chen,Yuanjia Zhao,Mingmao Wu,Ang Lin,Rilong Yang,Yan Yu
2D material films, such as MXene and graphene, featuring with robust mechanical properties and outstanding physicochemical properties, have attracted significant attention in varying fields. However, the current fabrication methodologies of 2D material films suffer from poor controllability, inefficient processing, elaborate equipment, or limited film scale and uniformity. A route which is free of fabrication equipment and energy supply while enables high-quality and programmable films is urgently needed yet unavailable to date. Herein, solar irradiation (SI) is proposed as an emerging route to develop large-area MXene or graphene oxide (GO) films with programmable structures, by means of their intrinsic light-to-heat conversion capability. The findings include: (i) under SI, photothermal-induced Marangoni effect leads to oriented flow fields, making nanosheets highly aligned and thereafter compact films. Mechanical strength and electrical conductivity of the films are enhanced by 259% and 75%, respectively, compared to ones fabricated via widespread vacuum-assisted filtration; (ii) impressively, MXene/GO lateral and vertical heterostructures with programmable 2D patterns and 3D shapes have been developed via this SI route, offering a versatile and flexible design strategy; and (iii) this emerging SI route makes 40-inch films at ambient temperature and pressure, without any external energy supply or devices. Download: Download high-res image (382KB) Download: Download full-size image
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高影响因子
ACS Omega
·
2025
·
IF 4.3
Wenbiao Zheng,Mingfeng Yu,Sujuan Yang,Licong Meng,Yonghe Xiu,Yifan Liu,Hanhui Lei,Terence Xiaoteng Liu,Zhanhui Yuan,Liwei Wang
Membrane separation is an important separation and purification technology, membrane materials are the key to membrane separation technology, and the rapid development of two-dimensional materials in recent years has brought new opportunities for membrane separation technology. Graphene oxide (GO) is a hydrophilic two-dimensional material, and its unique physical and chemical structure and properties give it the potential to become a high-performance separation membrane; however, the instability limits its application. In this study, a two-dimensional material, graphite-phase carbon nitride (g-C3N4), was integrated into graphene oxide (GO) to address the challenges associated with its practical applications. This modification not only endows the material with more advantageous properties as a membrane but also introduces a heterogeneous structure that bolsters the composite membrane’s stability. This structure also enhances the permeability and selectivity of the membrane, leading to impressive results in self-driven permeation tests and staggered-flow filtration tests under applied pressure. Following additional surface charge modifications, the composite membrane demonstrated a separation efficiency of approximately 90.4% in permeation tests and an impressive separation efficiency of 63.8% in filtration tests for binary mixed salt solutions. These results indicate a significant capability for mono- and divalent ion separation, suggesting promising potential for salt separation applications.
研究领域:
材料科学
·
膜分离技术
·
化学工程
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DOI
PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 5
·383
·
IF 4.3
Haonan Chi,Pan Cao,Qi Shi,Chaoyu Song,Yuguang Lv,Tai Peng
This study synthesized graphene oxide (GO)/zinc oxide (ZnO)/silver (Ag) composite materials and investigated their photocatalytic degradation performance for ciprofloxacin (CIP) under visible light irradiation. GO/ZnO/Ag composites with different ratios were prepared via an impregnation and chemical reduction method and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). The results demonstrated that under optimal conditions (20 mg/L CIP concentration, 15 mg catalyst dosage, GO/ZnO-3%/Ag-doping ratio, and pH 5), the GO/ZnO/Ag composite exhibited the highest photocatalytic activity, achieving a maximum degradation rate of 82.13%. This catalyst effectively degraded ciprofloxacin under light irradiation, showing promising potential for water purification applications.
研究领域:
环境科学
·
材料科学
·
化学工程
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PubMed
高影响因子
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