Nanomaterials
·
2018
·Vol. 8
·期 1
·35
·
IF 3.504
Yamei Liu,Caili Hou,Tifeng Jiao,Jingwen Song,Xu Zhang,Ruirui Xing,Jingxin Zhou,Lexin Zhang,Qiuming Peng
The design and self-assembly of graphene oxide (GO)-based composite membranes have attracted enormous attention due to their wide application in nanomaterial and environmental fields. In this work, we have successfully developed a strategy to fabricate new composite membranes based on poly(vinyl alcohol)/poly(acrylic acid)/carboxyl-functionalized graphene oxide modified with silver nanoparticles (PVA/PAA/GO-COOH@AgNPs), which were prepared via thermal treatment and the electrospinning technique. Due to the strong π-π forces and strong electrostatic interactions of GO–COOH sheets, the prepared composite membranes and their lager surface areas were modified by scores of AgNPs, which demonstrated that a high-efficiency photocatalyst removed the organic dyes from the aqueous solutions. The prepared PVA/PAA/GO-COOH@AgNPs nanocomposite membranes showed a remarkable photocatalytic capacity in the catalytic degradation of the methylene blue dye solutions. Most importantly, the whole process was easy, mild, and eco-friendly. Additionally, the as-prepared membranes could be repeatedly used after the catalytic reaction.Keywords:composite membranes;electrospinning;graphene oxide;photocatalyst;dyes degradation;wastewater treatment
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Feiyu Wang,Biaobiao Yan,Zirong Li,Ping Wang,Man Zhou,Yuanyuan Yu,Jiugang Yuan,Li Cui,Qiang Wang
Enzymatic antibacterial finishing is an eco-friendly alternative to develop functional silk-based materials. However, the low accessibility of tyrosine residues distributed in fibroin chains restricts the laccase-mediated functionalization of silk fibers (SF). To address this issue, a highly reactive p-hydroxyphenylacetic acid-modified polyethyleneimine (mPEI) was enzymatically grafted onto fibroin using laccase, aiming at constructing an antibacterial matrix of mPEI on the fiber surface. Subsequently, in situ deposition of silver nanoparticles (i.e., AgNPs) into the newly built mPEI network was performed to form a rapid antibacterial layer. The results indicated that laccase efficiently catalyzes the mPEI coupling, the zeta potential of SF-g-mPEI increases from −32 to 21.70 mV, and the silver content reaches 1.81% after AgNP embedment. Based on the combined two-step treatments, the obtained silk fabric exhibited excellent antibacterial abilities against two bacteria, including Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). The antibacterial rates of both bacteria reached 99.9% within 30 min of contact, remaining over 99.9% within 18 h of contact even after washing 10 times. The present work provides an enzyme-mediated method for construction of silk fabric with durable and rapid antibacterial activity.
研究领域:
材料科学
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生物技术
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纺织工程
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DOI
PubMed
高影响因子
OPTICS EXPRESS
·
2021
·Vol. 29
·期 21
·34085-34096
·
IF 3.894
Chundong Liu,Fengcai Lei,Yisheng Wei,Zhen Li,Chao Zhang,Qianqian Peng,Baoyuan Man,Baoyuan Man,Jing Yu,Jing Yu
Surface-enhanced Raman scattering (SERS) is widely considered to be a fingerprint spectrum that can realize molecular identification, and it continues to receive a lot of attention due to its high sensitivity and powerful qualitative analysis capabilities. In recent years, there has been a lot of work and reports on super-sensitive SERS substrates, but often the enhanced ability of the substrate is also effective for impurities and irrelevant molecules. Therefore, a problem that still remains to be solved is how to perform effective trace detection of specific substances in a complex detection environment. Herein, a superhydrophobic Ag nanoparticle/glass microfibre filter (AgNP/GF) substrate was designed to realize the Raman detection of complex multiphase solutions. The hydrophobic three-dimensional net-like structure provides efficient Raman enhancement, making the substrate have extremely high detection limits for dye molecules and even achieving specific detection of the hexane phase component (thiram molecule) in a multiphase solution.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2024
·
IF 4.9
Mo Minfu,Lin Yaling,Lin Junkang,Ma Xiaojuan,Hong Yubin,Chen Lihui,Wang Dong,Huang Liulian
In this work, an antimicrobial cellulose acetate composite nanofiltration membrane was successfully prepared via in-situ hybridization by anchoring silver nanoparticles (AgNPs) onto the surface of the cellulose acetate nanofiltration membranes for water treatment. DETA monomer was used as a reducing agent to reduce Ag + in AgNO 3 to AgNPs, while the primary amine group of Diethylenetriamine (DETA) monomer can react with 1,3,5-Trimesoyl chloride (TMC) to form a polyamides layer. As a result, the cellulose acetate nanofiltration membranes modified by AgNPs exhibited smoother surfaces and improved hydrophilicity, which resulted in enhanced permeability and resistance to fouling. The flux of the membrane increased from 12 to 37.7 L/m 2 h, and the FRR values of the membrane increased from 98.4 to 100% respectively in 3.5 cycles. Owing to robust electrostatic interaction between AgNPs and carboxyl groups of the cellulose acetate support, the membranes showed stable separation performance. Over extended operational periods, the membrane retained 37.7 L/m 2 h of flux and 92% of Na 2 SO 4 retention rate. Benefiting from the broad-spectrum antibacterial properties of silver, the membranes showed an excellent bactericidal rate of E. coli and S. aureus (> 99%). This work provided a new method for preparing cellulose acetate nanofiltration membranes with excellent antibacterial and separation performance. It also paved a new avenue to water treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Cheng Chen,Lei Chen,Xiaoying Zhu,Baoliang Chen
Low water flux and heavy membrane fouling hinder the use of graphene-based membranes for water purification and molecular sieving. To the end, a novel graphene-based membrane, intercalated with Ag nanoparticles anchored g-C 3 N 4 (AgNP@g-C 3 N 4 ) as pillars and photocatalysts, was fabricated through a mixed-dimensional assembly strategy. The uniform loading of Ag nanoparticles on g-C 3 N 4 can greatly improve the photocatalytic ability of g-C 3 N 4 while creating more water transport channels between reduced graphene oxide (rGO) and g-C 3 N 4 laminates. The resultant rGO/AgNP@g-C 3 N 4 nanofiltration membrane displayed efficient water permeability, superior photocatalytic self-cleaning performance, and owned excellent flexibility and structural stability. The water permeability of the rGO/AgNP@g-C 3 N 4 membrane was considerably improved (210.9 L∙m −2 ∙h −1 ∙bar −1 ) compared to the pure rGO membrane (78.4 L∙m −2 ∙h −1 ∙bar −1 ) due to the larger interlayer spacing and rough surface. After 1 h of visible light irradiation, the decrease of flux produced by pollutant molecule adsorption can recover with a ultrahigh flux recovery ratio (FRR) of 98.1%. Moreover, the high flux of the rGO/AgNP@g-C 3 N 4 membrane remained stable in a cross-flow photocatalytic nanofiltration device. Membrane separation, photocatalytic regeneration, and pollutant degradation by ·OH and ·O 2 − radicals are proposed as effective cooperation mechanisms.
研究领域:
材料科学
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环境工程
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纳米技术
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膜分离
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光催化
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水处理
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Zongrui Tong,Jueying Yang,Lizhi Lin,Ruiqi Wang,Bin Cheng,Yu Chen,Liansheng Tang,Jianying Chen,Xilan Ma
In the present work, a poly(γ-glutamic acid)/alginate/silver nanoparticle (PGA/Alg/AgNP) composite microsphere with excellent antibacterial and hemostatic properties was prepared by the in situ UV reduction and emulsion internal gelation method, and its potential application for antibacterial hemostatic dressing was explored. Well dispersed AgNPs were in situ synthesized by a UV reduction method with alginate as stabilizer and reductant. The AgNPs showed excellent antibacterial activities against both gram-negative and gram-positive bacteria. Additionally, the AgNPs prepared by the in-situ UV reduction exhibited better biocompatibility and antibacterial effects than those prepared by the conventional chemical reduction method. PGA/Alg/AgNP composite microspheres were then prepared with the AgNPs by an emulsion internal gelation method. Such microspheres were found to be a porous and hollow network with pH-sensitive swelling properties and excellent hemostatic performance, indicating its application potentials as an advanced antibacterial hemostatic material.
研究领域:
材料科学
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纳米技术
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
·
IF 8.4
Han Lu,Dan Wang,Guangfei Huang,Qilin Ma,Yuan Zhang,Mingliang Jin,Lingling Shui
Surface-enhanced Raman spectroscopy (SERS) has exhibited great potential in deoxyribonucleic acid (DNA) analysis. Rapid and label-free identification of single-base mutation in DNA is still limited by the sensitivity and reproducibility of SERS substrates. In this work, we develope plasmonic SiNW arrays decorated with Ag nanoparticles (SiNW@AgNP arrays) via hexadecyltrimethylammonium bromide (CTAB)-assisted galvanic reaction to address these challenges, which show excellent sensitivity and reproducibility. Under optimized experimental conditions, plasmonic SiNW@AgNP arrays enable detection of DNA bases of adenine (A), guanine (G), cytosine (C), and thymine (T) in solution at concentration down to pM-μM range, and multiple detection ability with mixture of DNA bases. More significantly, our study demonstrates the SiNW@AgNP arrays may serve as excellent SERS substrates in discriminating DNA single-base mutation between sickle cell anemia gene and normal hemoglobin gene in serum samples, which can be exploited in a wide range of plasmonic enhanced sensing applications for a fast, real-time, label-free and cost-effective clinical diagnosis.
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Xuemei Sun,Han Liang,Huiyan Wang,Na Meng,Suxing Jin,Ninglin Zhou
In this study, a kind of nanocomposite film was fabricated via combining silk fibroin, polyvinyl alcohol (SF/PVA) and AgNP/polydopamine-modified Montmorillonite (AgNP/PDA-Mt). The structural characteristics and properties of the SF/PVA/AgNP/PDA-Mt nanocomposites films were identified using X-ray diffraction (XRD), Thermal gravimetric analyzer (TGA), Fourier transform infrared spectroscopy (FTIR), EDS-mapping analyses and Scanning electron microscope (SEM). The results indicated enhanced thermal performance of SF/PVA/AgNP/PDA-Mt nanocomposites with increased AgNP/PDA-Mt weight. The nanocomposite film exhibited excellent antibacterial activity against E. coli and S. aureus . The 2 % SF/PVA/AgNP/PDA-Mt film showed the highest zone of inhibition with an average inhibition circle diameter of 26.1 mm against E. coli and 20.61 mm against S. aureus . Cytotoxicity test results indicated that the nanocomposites films were biocompatible with L929 cells with a 100 % survival rate, which can be considered as one of the advantages of new nanocomposites films. These findings suggest that SF/PVA/AgNP/PDA-Mt films have potential clinical applications in wound dressing and antibacterial biomedical applications.
研究领域:
材料科学
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纳米技术
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生物医学工程
·
生物材料
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DOI
PubMed
高影响因子
IONICS
·
2017
·Vol. 23
·期 11
·3211-3218
·
IF 2.062
Xu Guiyun,Liang Shaoping,Zhang Mingming,Fan Jinshi,Feng Jiuju,Yu Xijuan
Carboxylated cellulose nanocrystals (CNCC) were synthesized by treating microcrystalline cellulose with ammonium persulfate. Silver nanoparticles (AgNPs) were prepared on the surface of CNCC using NaBH 4 as reductant. Novel conducting nanocomposites of poly(3,4-ethylenedioxythiophene) (PEDOT) doped with AgNPs/CNCC were electrodeposited on the surface of the glassy carbon electrode. The nanocomposites prepared in various ratios of PEDOT, CNCC, and AgNPs were characterized by scanning electron microscopy, transmission electron microscope, electrochemical impedance spectroscopy, cyclic voltammetry, and differential pulse voltammetry. The prepared PEDOT/AgNPs/CNCC showed much low electrochemical impedance and very good response towards the oxidation of dopamine. Based on these findings, a highly stable, sensitive, and selective amperometric sensor for the detection of dopamine was developed. Operated at 0.20 V (vs. Ag/AgCl), the sensor can detect dopamine in the range of 0.05 to 782 μM with a 17-nM detection limit.
研究领域:
材料科学
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生物医学工程
·
分析化学
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产品关联
DOI
高影响因子
ANALYTICAL LETTERS
·
2021
·
IF 2.329
Mengke Jin,Jiajia Shan,Xue Wang,Tao Ren,Xinjing Li
Florfenicol has been widely used in livestock and aquaculture to treat bacterial infections. Due to the abuse of antibiotics, florfenicol has been released into the environment. Thus, there is a need for the rapid determination of trace levels of florfenicol in the environment. To improve the sensitivity for florfenicol, solid phase extraction (SPE) was employed to enrich florfenicol from multi-residue antibiotic mixtures followed by in situ determination by surface-enhanced Raman spectroscopy (SERS). Activated carbon, C18, graphene oxide (GO), and sand were applied to concentrate florfenicol in water. Silver nanoparticles (AgNP)-coated silicon (AgNPs@Si) substrate was employed to determine florfenicol enriched on the adsorbent. The results showed that the detection limit of florfenicol in water was 2.8 × 10−9 mol/L following the adsorption and enrichment of activated carbon. Besides, activated carbon was performed to extract florfenicol from the multi-residue antibiotic mixtures, including enrofloxacin, norfloxacin, and florfenicol. The results showed that activated carbon combined with SERS specifically determined florfenicol in complex antibiotic mixtures with a detection limit of 2.8 × 10−9 mol/L. Moreover, to better understand the adsorption mechanisms, the mechanism of the interaction of florfenicol with activated carbon was investigated.
研究领域:
环境科学
·
分析化学
·
药物分析
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 4
·540
·
IF 4.7
Haiyang Liao,Yeqi Xiao,Tiemin Xiao,Hongjin Kuang,Xiaolong Feng,Xiao Sun,Guixin Cui,Xiaofei Duan,Pu Shi
The emergence of novel e-textile materials that combine the inherent qualities of the textile substrate (lightweight, soft, breathable, durable, etc.) with the functionality of micro/nano-electronic materials (conductive, dielectric, sensing, etc.) has resulted in a trend toward miniaturization, integration, and intelligence in new electronic devices. However, the formation of a conductive network by micro/nano-conductive materials on textiles necessitates high-temperature sintering, which inevitably causes substrate aging and component damage. Herein, a bis-hydroxy-imidazolium chloride salt as a hard segment to synthesize a waterborne polyurethane (WPU) adhesive is designed and prepared. When used in nano-silver-based printing coatings, it offers strong adherence for coatings, reaching 16 N cm−1; on the other hand, the introduction of chloride ions enables low-temperature (60 °C) chemical sintering to address the challenge of secondary treatment and high-temperature sintering (>150 °C). Printed into flexible circuits, the resistivity can be controlled by the content of imidazolium salts anchored in the molecular chain of the WPU from a maximum resistivity of 3.1 × 107down to 5.8 × 10−5Ω m, and it can conduct a Bluetooth-type finger pulse detector with such low resistivity. As a flexible circuit, it also offers high stability against washing and adhesion, which the resistivity only reduces less than 20% after washing 10 times and adhesion. Owing to the adjustability of the resistivity, we fabricated an all-textile flexible pressure sensor that accurately differentiates different external pressures (min. 10 g, ~29 Pa), recognizes forms, and detects joint motions (finger bending and wrist flexion).
研究领域:
材料科学
·
电子工程
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产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2019
·
IF 2.584
Xinxin Huang,Ran Wang,Tifeng Jiao,Guodong Zou,Fangke Zhan,Juanjuan Yin,Lexin Zhang,Jingxin Zhou,Qiuming Peng
MXene as a kind of two-dimensional nanomaterial has aroused people’s strong research interest because of its excellent properties. In the present study, we introduced a new poly(vinyl alcohol)/poly(acrylic acid)/Fe3O4/MXene@Ag nanoparticle composite film fabricated by electrospinning and heat treatment as well as self-reduction reaction process. The obtained composite films showed high self-reduction ability because of the incorporation of MXene flakes. The intercalated MXene flakes in the composite nanofibers were evenly distributed, which not only solved the aggregation problem from MXene dispersion but also could self-reduce Ag nanoparticles in situ in composite materials. In addition, the composite nanofiber films exhibited good fiber structure, thermal stability, and magnetic properties. Moreover, the composite nanofiber films demonstrated excellent catalytic ability and cycle stability to 4-nitrophenol and 2-nitroaniline.
研究领域:
材料科学
·
纳米技术
·
环境工程
·
催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）