CELLULOSE
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2022
·Vol. 29
·期 4
·2525-2537
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IF 6.123
Liang Chunliu,Zang Limin,Shi Fangfang,Yang Chao,Qiu Jianhui,Liu Qifan,Chen Zhenming
Cotton fabric (CF) fabricated by natural cellulose fibers has porous structure, abundant hydrophilic hydroxyl groups and good mechanical flexibility, which is a promising substrate for flexible fabric-based supercapacitors. Graphene oxide (GO) nanosheets were fixed on the CF by vacuum filtration, and then the pyrrole monomers and silver ions (Ag + ) were adsorbed to the surface of GO/CF by π-π and electrostatic interactions, respectively. Polypyrrole/silver (PPy/Ag) nanoparticles were generated on the surface of GO/CF via in situ UV-induced polymerization, forming the flexible PPy/Ag/GO/CF electrodes. The electrodes combine three active materials (PPy, Ag and GO), which show good electrochemical performance. The electrode prepared under optimum conditions (UV irradiation time: 120 min; mass loading of GO on the CF: 3 mg cm −2 ) exhibits a high specific capacitance of 1664.0 mF cm −2 . The flexible symmetric quasi-solid-state fabric-based supercapacitor (QFSC) based on the optimum electrode also keeps superior electrochemical performance and excellent mechanical flexibility, which has a great application prospect for wearable energy storage devices.
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PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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2022
·Vol. 119
·期 3
·e2114138119
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IF 12.779
Junhui Wang,Qi Fu,Jiaxing Yu,Huangsheng Yang,Zhengping Hao,Fang Zhu,Gangfeng Ouyang
The Fenton-like process catalyzed by metal-free materials presents one of the most promising strategies to deal with the ever-growing environmental pollution. However, to develop improved catalysts with adequate activity, complicated preparation/modification processes and harsh conditions are always needed. Herein, we proposed an ultrafast and facile strategy to convert various inefficient commercial nanocarbons into highly active catalysts by noncovalent functionalization with polyethylenimine (PEI). The modified catalysts could be in situ fabricated by direct addition of PEI aqueous solution into the nanocarbon suspensions within 30 s and without any tedious treatment. The unexpectedly high catalytic activity is even superior to that of the single-atom catalyst and could reach as high as 400 times higher than the pristine carbon material. Theoretical and experimental results reveal that PEI creates net negative charge via intermolecular charge transfer, rendering the catalyst higher persulfate activation efficiency.
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DESALINATION
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2022
·
IF 11.211
Yuhui Jia,Guorong Xu,Xiaochan An,Yunxia Hu
The application of membrane distillation (MD) has been severely limited by membrane wetting, particularly when treating feed solutions having contaminants with low surface energy . Herein, inspired by the special anti-wetting properties of the graphene-based membrane, a simple and scalable approach has been developed to fabricate the anti-wetting composite membranes with a reduced graphene oxide (rGO) skin layer and a microporous polytetrafluoroethylene (PTFE) substrate. The anti-wetting mechanism of rGO was investigated using a quartz crystal microbalance with dissipation and also fluorescence microscope. The prepared rGO-PTFE composite membrane exhibited outstanding MD performance with high water flux of about 60 L·m −2 h −1 , excellent salt rejection (>99.9%) and robust anti-wetting properties when desalinating a 3.5 wt% NaCl feed solution with 0.8 mM sodium dodecyl sulfate (SDS) for 66 h at the temperature difference of 40 °C. Moreover, the rGO-PTFE composite membrane achieved an ultrahigh water flux of about 149 LMH and perfect salt rejection (100%) at a temperature difference of 60 °C, which is 1.2–3.5 times as high as the flux of the reported MD membranes. Our research provides a robust rGO composite membrane with high flux and anti-wetting properties in MD and offers some insightful understanding about the anti-wetting mechanism of rGO against SDS and water.
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ANALYTICA CHIMICA ACTA
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2022
·
IF 6.911
Sheng Peng,Yuyan Huang,Sai Ouyang,Junlong Huang,Yueru Shi,Yuan-Jun Tong,Xueli Zhao,Nan Li,Jiating Zheng,Juan Zheng,Xinying Gong,Jianqiao Xu,Fang Zhu,Gangfeng Ouyang
The design and synthesis of novel high-performance solid phase microextraction (SPME) coatings towards organic pollutants with diverse chemical properties is still a challenge in sample preparation. Herein, a stable chitosan cross-linked graphene oxide (GOCS) aerogel was reported as a novel coating for solid phase microextraction. The interpenetrated meso- and macropores ensured the large surface area and high accessibility of the functional groups across the aerogel, resulting in high extraction performance towards target hydrophobic pollutants. The extraction capacities of the GOCS-coated SPME fiber towards analytes (e.g. polycyclic aromatic hydrocarbons , organophosphorus pesticides , organochlorine pesticides , pyrethroids , and polychlorinated biphenyls) were about 0.5–13 times as high as those obtained by the commercial fibers (30 μm polydimethylsiloxane (PDMS), 65 μm polydimethylsiloxane/divinylbenzene (PDMS/DVB)), which was attributed to the hydrophobic, π-π, halogen bond and hydrogen bond interactions between the coating and the analytes. Under the optimized extraction conditions, superior analytical performances for PAHs were achieved with a wide linearity (0.5–1000 ng L −1 ), high enhancement factors (311–3740), and the low limits of detection (0.03–1.28 ng L −1 ). Finally, the GOCS-coated SPME fiber was successfully applied to the determination of PAHs in real water samples with good recoveries (91.6%–110%).
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Journal of Energy Chemistry
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2022
·
IF 13.599
Yao Chen,Yuming Zou,Xiaoping Shen,Jingxia Qiu,Jiabiao Lian,Jinrui Pu,Sheng Li,Fei-Hu Du,Shang-Qi Li,Zhenyuan Ji,Aihua Yuan
Germanium (Ge), an alloy-type anode material for lithium-ion batteries (LIBs), possesses many advantages such as high theoretical capacity and decent electrical conductivity. Nevertheless, its application is restricted by tremendous volume variation and tardy reaction kinetic during discharge/charge process. In this paper, the Ge/3DPG composites with Ge nanoparticles uniformly dispersed in 3D interconnected porous graphene (3DPG) skeleton are successfully prepared using a template-assisted in-situ reduction method. The unique 3D interconnected porous graphene can not only enhance the electronic conductivity and reaction kinetics of the materials, but also provide sufficient buffer space to effectively mitigate the volume expansion during cycling and strengthen the structural integrity. Moreover, the small-sized Ge nanoparticles in close conjunction with the 3D graphene can boost the surface-controlled reaction of the electrode, which contributes to a fast charge–discharge rate capability. The Ge/3DPG composite with optimized Ge/graphene mass ratio delivers high reversible specific capacity (1102 mAh g −1 after 100 cycles at 0.2 C), outstanding rate capability (494 mAh g −1 at 5 C), and admirable cycling stability (85.3% of capacity retention after 250 cycles at 0.5 C). This work provides a significant inspiration for the design and fabrication of advanced Ge-based anode materials for next-generation high-performance LIBs.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2022
·Vol. 414
·期 6
·2251-2263
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IF 4.478
Liu Rong,Gao Wenqing,Yang Jiaqian,Zhang Shun,Wang Chenlu,Lin Jing,Zhang Sijia,Yu Jiancheng,Tang Keqi
A novel hydrophilic porous biocomposite was fabricated by incorporating graphene oxide (GO) @chitosan (CS) foam substrate (GO@CS@ZIF-8 foam) with ZIF-8 crystals in situ via a facile stirring method for simultaneous enrichment of glycopeptides and phosphopeptides from complex biological samples. The experimental results demonstrated that GO@CS@ZIF-8 foam exhibited favorable specificity for simultaneous enrichment of N-glycopeptides and phosphopeptides under the same condition for HRP and β-casein tryptic digest mixtures. The novel material was further applied to enriching both glycopeptides and phosphopeptides simultaneously from 4 μL complex human serum, and 423 N-glycopeptides and 40 phosphopeptides corresponding to 133 glycoproteins and 29 phosphoproteins were identified, respectively. Graphical abstract
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Nano Today
·
2022
·
IF 18.962
Diego Stéfani T. Martinez,Laura-Jayne A. Ellis,Gabriela H. Da Silva,Romana Petry,Aline M.Z. Medeiros,Hossein Hayat Davoudi,Anastasios G. Papadiamantis,Adalberto Fazzio,Antreas Afantitis,Georgia Melagraki,Iseult Lynch
The aquatic ecosystem is the final destination of most industrial residues and agrochemicals resulting in organisms being exposed to a complex mixture of contaminants. Nanomaterials (NMs) are being increasingly applied in many technologies and industrial sectors, so there is an increasing concern about the negative impacts of NMs in the environment after their interaction with co-contaminants. Consequently, mixture toxicology has been gaining attention in nanotoxicology recently. Usually, mixture toxicity or combined toxicity is estimated from the individual effects of the chemicals using the mathematical models of concentration addition (CA) or independent action (IA), however these models do not account for metabolic interactions between the chemicals, when they act in related metabolic pathways and molecular targets . As NMs unique physico-chemical properties make them highly reactive with a high surface area for adsorption, those models may not realistically estimate the toxicological effects of mixtures containing NMs. The co-exposition of NMs and other environmental contaminants (e.g., organic pollutants and heavy metals) may cause different mixture effects such as addition, synergism, antagonism, or even other complicated responses, including altered toxicokinetics/toxicodynamics, which vary according to the individual components properties, environmental exposure conditions, and the biological system. Therefore, the large number of factors that may influence the toxicity of a NM and contaminant mixture makes NMs mixture risk assessment a complex task. Daphnia magna are one of the most commonly used model species in nanotoxicology, including in mixture studies. It’s advantages include short generation time, small body sizes, ability to produce large populations rapidly, coupled with its completely mapped genome which allows the use of a multitude of omics techniques to understand the stress responses of daphnids to NMs and chemicals. Here, we analyse the toxicological effects of NMs and contaminant mixtures using Daphnia as a model organism, and discuss future perspectives for NMs-mixtures risk assessment focusing on harmonization of methodologies and application of data-driven science in mixture ecotoxicology.
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CHEMOSPHERE
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2022
·
IF 8.943
Yayan Tong,Shuangying Li,Yalin Wu,Jinghan Guo,Boyao Zhou,Qingxiang Zhou,Liushan Jiang,Jingwen Niu,Yue Zhang,Huanhuan Liu,Shuai Yuan,Shiyu Huang,Yali Zhan
In this study, graphene oxide modified magnetic polyamidoamine dendrimers (MNPs@PAMAM-G2.0@GO) nanoparticles were successfully prepared by amidation method. The obtained MNPs@PAMAM-G2.0@GO nanocomposites were examined by fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), scanning electron microscope (SEM) and transmission electron microscopy (TEM), etc. MNPs@PAMAM-G2.0@GO exhibited excellent adsorption property and was investigated for magnetic solid phase extraction (MSPE) of polycyclic aromatic hydrocarbons (PAHs) from water. The detection of extracted PAHs was accomplished by high performance liquid chromatography (HPLC) and gas chromatography tandem mass spectrometry (GC-MS/MS). The target PAHs included anthracene (ANT), pyrene (PYR), fluoranthene (FLT), carbazole (CB), 7-methylquinoline (7-MQL), 9-methylcarbazole (9-MCB), dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DBT). Important operation parameters for MSPE that could affect the extraction efficiencies of PAHs were investigated in detail. Under optimal parameters, the constructed method demonstrated excellent linear range with 0.001–10 μg L −1 for analytes and low limits of detection within the range of 0.11–0.9 ng L −1 . The spiked average recoveries of PAHs in natural water samples ranged from 92.5% to 105.2%. The promising results indicated that MNPs@PAMAM-G2.0@GO could be employed to efficiently extract PAHs from aqueous samples.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xue Gao,Kai Zheng,Qiyan Zhang,Xiaoqing Cao,Shan Wu,Jixin Su
In this work, the TiO 2 -RGO/LDHs photocatalyst was synthesized by a hydrothermal method using GO/LDHs as substrates. The structure and property of prepared materials were characterized via XRD, SEM, EDS, XPS, TEM, UV–vis spectroscopy, etc. Toluene, methanol, and ethyl acetate were selected as typical volatile organic pollutants model pollutants to examine the photocatalytic degradation effect of TiO 2 -RGO/LDHs. The photocatalytic efficiency of the TiO 2 -RGO/LDHs system was further investigated in contaminated air (NOx = 20 ppm). The results indicated that the prepared TiO 2 -RGO/LDHs nanocomposite possess better photodegradation activity than pure TiO 2 and TiO 2 -RGO samples, and the photocatalyst has excellent application for the elimination of three kinds of VOCs. The photochemical and materials characterization revealed that the graphene has enlarged the light response range and inhibited the recombination of electron-hole pairs of TiO 2 . Meanwhile, LDHs can offer more hydroxide ions to accelerate the oxidation reaction, resulting in more radicals and better pollutants degradation.
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LANGMUIR
·
2022
·
IF 4.331
Jiwei Huang,Dandan Li,Langhuan Huang,Shaozao Tan,Ting Liu
In recent years, the discharge of industrial waste oil has increased and offshore oil leakage has occurred frequently, and thus water pollution has become a worldwide problem that attracts much attention. In this regard, a kind of oil-absorbing material with high oil-absorbing property and good mechanical property is urgently needed. Here, we reported a new type of aerogels with three-dimensional layered voids using natural bamboo powder, waste paper (WP), and graphene oxide (GO) as raw materials. The obtained aerogel had high adsorption capacity (87–121 g/g), compressibility, and high elasticity, which can separate oil from water and selectively absorb oil. This study provides not only a new treatment in agricultural waste treatment but also a facile, green, and low-cost approach to synthesize high-performance graphene-based oil absorbers, which might give us an effective solution for oil pollution of water resources worldwide.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Moumita Maiti,Manas Sarkar,Soumen Maiti,Donghong Liu
This work explores noble metal coupled carbon-based nanohybrid materials specifically for their antibacterial and photo-disinfection capabilities from a broader perspective of health to clean. Using gold (Au) nanoparticles (NPs) on the surface of two different shaped zinc oxide-graphene (ZnO-rGO) nanohybrids such as flake and spherical, this experiment aims to manage a pathogen-free environment while filtering and recycling carcinogenic dye-containing wastewater. The shape-tailored ZnO-rGO-Au hybrid generate a substantial amount of reactive oxygen species ; ROSs: hydroxyl radical (•OH), superoxide (•O 2 - ), singlet oxygen, and ( 1 O 2 ) and focal electrostatic interactions on (gram-negative Escherichia coli and gram-positive Staphylococcus aureus ) bacterial cell membranes . Redox cycling and strong potential binding tendency rapture the structural organization of cells that is clearly reflected in growth kinetics, (3(4, 5-dimethylthiazol-2-yl)−2), 5-diphenyl tetrazolium bromide (MTT), inner permeable/ protein/ malondialdehyde assay, and microscopical images after the morphology dependent physical as well as the chemical effects of nanocomposites . The minimum bactericidal concentration (MBC) or minimum inhibitory concentration (MIC) studies show the Au/rGO-ZnO system to be the very potent antibacterial agent , and that only 0.18 mg/ml represents significant bactericidal activity while their toxicity towards mammalian cells is very low (>2 mg/ml). Furthermore, Au NPs alter the bandgap energy of Au/rGO-ZnO hybrids, causing the formation of ROSs at different pH levels or dosages of the catalyst, which results in excellent photocatalytic activity (96% degradation of Rhodamine B when using 0.75 mg catalyst). Based on a Pseudo-first-order kinetic model , a likely mechanistic pathway towards exceptional dye decomposition has also been identified.
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MATERIALS LETTERS
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2022
·
IF 3.574
Zhenzhan Yan,Li Yang,Jimin Han,Wenchao Tong
In this work, we chose graphene oxide , lead acetate, and polyvinyl alcohol as precursor materials, and prepared spherical carbon-based lead azide composites in which nano-level lead azide was uniformly distributed in the graphene sheet layer. Detailed characterization shows that due to the excellent thermal and electrical conductivity of the graphene sheet, the electrostatic sensitivity of LA/C/GA (lead azide/carbon/graphene) is reduced from 0.11 J to 1.84 J, and the flame sensitivity is increased from 8 cm to 43 cm. The performance of LA/C/GA is better than previously reported pure LA (lead azide) and most modified LA materials.
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危险品化学品经营许可证（带存储）