OPTICAL MATERIALS
·
2021
·
IF 3.08
Yanlin Li,Xuegang Lu,Sen Yang
Fluorescence detection is actually available on measuring substances by using metal-based micro or nano structures which produce a great surface enhanced fluorescence (SEF) effect in quick response to endless diseases and environmental problems recently. However, traditional SEF substrates are expensive, as well as inefficient due to single-component detection mode. Therefore, SEF substrates with controllable fluorescence enhancement formed by magnetically responsive CoFe 2 O 4 @SiO 2 @Ag colloidal photonic crystals were designed in this work. The fluorescence spectra were enhanced selectively at different wavelength owing to photonic band gap adjusted by magnetic field so as to detect Rhodamine B (RB) and fluorescein isothiocyanate (FITC) which had quite different fluorescence emission wavelength. As-prepared composites showed that the highest enhancement factors were 12.6 and 17.6 fold for RB and FITC, respectively, only when the tunable photonic band gap matched with the fluorescence emission wavelength of fluorescent molecules. The mechanism of significant fluorescence enhancement was explained in detail. The CoFe 2 O 4 @SiO 2 @Ag substrates were confirmed to be reliable, sensitive and reproducible in detecting a variety of fluorescent molecules. The results played an important role in effective fluorescence detection, such as chemical analysis, biological sensing and cell imaging .
研究领域:
材料科学
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生物医学检测
·
光学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 12
·16870-16875
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IF 4.527
Yanlin Li,Wenyuan Duan,Jian Wei
Among various carbon materials, diamond stands out due to excellent physical and chemical properties. In this work, we designed Dia@SiO 2 @Ag composites combining diamond micropowder and Ag nanoparticles by a simple chemical method and obtained stable substrate for surface enhanced Raman scattering (SERS) owing to its high surface-to-volume ratio, low density, as well as close bond between diamond and Ag. As-prepared Dia@SiO 2 @Ag presented high activity to detect crystal violet and rhodamine 6G molecules, which was demonstrated by significantly enhanced SERS spectra and high enhancement factor values (10 8 -10 9 ). Moreover, Dia@SiO 2 @Ag also showed desired sensitivity, which was investigated by detection limit. Therefore, our study provided more theoretical support and broadened the functional applications of diamond, particularly in Raman detection.
研究领域:
材料科学
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纳米技术
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分析化学
·
拉曼光谱
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DOI
高影响因子
OPTICS COMMUNICATIONS
·
2026
·
IF 2.7
Haiyu Tian,Haidong Qi,Yongjun Zhang,Yaxin Wang,Xiaoyu Zhao,Renxian Gao
Surface-enhanced Raman scattering (SERS) is a powerful surface analysis technique that significantly amplifies the Raman scattering signals of molecules adsorbed onto metallic nanostructures, enabling highly sensitive detection of the analytes. The development of low-cost, high-performance SERS substrates through facile and straightforward fabrication methods represents a challenging and highly rewarding endeavor. Here, we develop a suspended sandwich Ag/SiO 2 /Ag nanopore array structure based on template-assisted method with significant plasma coupling effects, which shows an ultra-low detection limit (LOD of 2.91 × 10 −11 mol/L) for 4-MBA molecules, excellent sensitivity (EF = 5.76 × 10 8 ) and high uniformity and stability. COMSOL simulation confirms the electromagnetic coupling in the sandwich structure in addition to the hotspots along the nanopore brims. The proposed SERS substrate enables quantitative detection of glyphosate with the concentration down to 4.66 × 10 −9 mol/L and fulfills the requirements for monitoring pesticide residues.
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DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 1
·59
·
IF 2.935
Wenqiang Wang,Xi Chen,Chu Zhao,Bowu Zhao,Hualin Dong,Shengkui Ma,Liying Li,Li Chen,Bin Zhang
A blend of Polyvinylidene Fluoride (PVDF) and SiO2microspheres inN,N-Dimethylformamide (DMF) underwent phase inversion to form a PVDF/SiO2membrane with SiO2microspheres in the membrane’s pores. Subsequently, the SiO2microspheres have been used as platforms for in site Ag nanoparticles (NPs) synthesis, forming a composite membrane. Benefitting from the full exposure of Ag NPs to the reactants, the composite membrane shows high catalytic reactivity when catalyzing the reduction ofp-nitrophenol under a cross-flow. The catalytic reaction follows the first-order kinetics, and the reaction rate increases with an increase in the amount of Ag NPs in the membrane, the reaction temperature, and the operating pressure. What is more, highly purified products can be produced and separated from the reactants in a timely manner by using the composite membrane.Keywords:Ag nanoparticles;catalysis;composite membrane;separation;SiO2microspheres
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Yulong Liu,Jian Fu,Hao Zeng,Ruixue Qu,Qing Feng,Xiaonan Li,Fan Zhang,Yuehui She
Aiming at the problems of small pores, complex structure, large seepage resistance, and poor recovery effect in the development process of offshore medium and low permeability reservoirs, a green and environmental friendly biological nanocomposite fluid (BNF) was developed to enhanced crude oil recovery (EOR). Fe 3 O 4 @SiO 2 -Ag nanoparticles (NPs) were synthesized in the laboratory, and citric acid, tannic acid, sodium alginate, and trehalose lipids were used as surface modifiers for NPs and as fluid stabilizers. The nanocomposites were characterized by SEM–EDS, TEM, FTIR, XPS, XRD, and VSM. The EOR mechanism of BNF was studied by laboratory experiments, in which the interfacial tension can be reduced by 80 %. Moreover, 500 ppm BNF could keep oil and water emulsified for more than 3 months. Static separation of oil droplets and dynamic stripping of oil film exhibited obvious effects, and the bioactive substances’ dispersant and NPs can jointly drive away residual oil. The experiment on core displacement of crude oil showed that 500 ppm BNF can enhance oil recovery by 15.56 % on the basis of water flooding. The BNF oil displacement agent is economic and environmental friendly, providing a new method for the green and high-quality development of offshore oil fields.
研究领域:
石油工程
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材料科学
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ziyu Liu,Huanrui Liu,Daofu Zhang,Yongsheng Li,Fangfang He,Zhuoni Jiang,Hongxia Yang,Xinghua Zhu,Wenbin Yang
By intelligently modulating the thermal energy exchange between the skin and the environment, phase change fabrics are important for improving the thermal comfort of the wearer, saving energy, and expanding the functionality of smart textiles. In this study, paraffin@SiO 2 @Ag phase change microcapsules (M s ) were tightly encapsulated in calcium alginate (CA) matrix using wet spinning process. CA/M s phase change composite fibers with different mass ratios were designed. When the CA/M s mass ratio was 1:1, the CA/M s phase change enthalpy ΔH m was 64.3 J/g, and the maximum tensile strength was 1.27 MPa, along with excellent thermal stability and photothermal conversion efficiency. In addition, the introduction of different contents of carbon nanotubes (CNTs) into CA/M s could improve the thermal conductivity and photothermal conversion efficiency. When the cont1ent of CNTs was 10 phr, the thermal conductivity of CA/M s /CNTs (CMC) was increased by 159 %. Therefore, these phase change composite fibers with excellent photothermal efficiency offer new possibilities for the exploitation of smart fabrics and are anticipated to have a significant role in the area of smart textiles.
研究领域:
材料科学
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纺织工程
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智能纺织品
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DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 42
·13128-13138
·
IF 0
Juan Zhou,Feng Ren,Shaofeng Zhang,Wei Wu,Xiangheng Xiao,Ying Liu,Changzhong Jiang
Tailorable synthesis of plasmon enhanced catalysts with high solar-light harvesting and energy-conversion efficiency has attracted wide interest due to its scientific and technological importance. In this paper, novel SiO2–Ag–SiO2–TiO2 multi-shell photocatalysts with wide-spectral-response were systematically designed and controllably synthesized, where the SiO2 spheres were used as the cores, and the SiO2 interlayers coated on the Ag nanoparticle (NP) shells were used to separate the Ag from the TiO2 shell. The structures of the SiO2–Ag–SiO2–TiO2 multi-shell photocatalysts can be tailored by changing the thickness of SiO2 interlayers from 1 to 2, 5, 8, 12, and 20 nm, while the anatase N-doped TiO2 shells with visible light response are maintained at a thickness of 20 nm. The photocatalytic activity tests show that the enhanced photocatalytic efficiency under both ultraviolet (UV) and visible light irradiation is related to the existence of Ag NP shells and the thickness of SiO2 interlayers. The complicated coupling mechanisms between TiO2 and a plasmon are systematically discussed, and a clear physical picture for the complicated coupling processes is presented. The main reasons for the enhancement of the photocatalytic activity of the SiO2–Ag–SiO2–TiO2 multi-shell structures are the localized surface plasmon resonance (LSPR) effect and scattering effect induced by Ag NPs.
研究领域:
材料科学
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光催化技术
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纳米科技
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产品关联
DOI
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 4
·e70171
·
IF 3.4
Huanhuan Bai,Yuxin Chen,Chengzhi Song,Yanyan Dong,Xu Meng
Superhydrophilic/submerged superoleophobic cotton fabrics with antibacterial properties were obtained by loading SiO 2 nanoparticles and Ag + on the surface of cotton fabrics through SiO 2 –Ag + composite sols, followed by the modification of the cotton fabrics with dopamine methacrylamide (DMA) and [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide (SBMA). The surface morphology and wettability of the modified fabrics were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric/differential thermal analysis (TG), and contact angle measurement. The underwater contact angle and surface wettability analysis showed that the modified cotton fabric had an underwater oil contact angle of 166.5°. The prepared fabric can be used as an effective medium for the gravity-driven separation of oil/water mixtures. The modified fabrics showed resistance to sparing of vegetable oils or different organic solvents, and the average separation efficiency was better than 93% for all types of oil/water mixtures and up to 97%. In addition, the modified fabrics successfully inhibited the growth of Escherichia coli and Staphylococcus aureus with excellent antimicrobial properties.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF THE TEXTILE INSTITUTE
·
2019
·
IF 1.063
Hongbin Li,Yan Zhuang,Hao Li,Karen Chávez Bracamontes,Dawei Wang,Ying Sun,Dan Sun,Lingping Kong,Shuzhen Gao,Mizhao Song
Surface modification is an important element of textile manufacturing. The SiO2/Ag sol–gel was coated on the cotton/linen fabric by a simple two-dipping-two-rolling coating machine. SEM, Zeta-potential, (ATR)-FTIR and XRD, physical properties, water-droplet adsorption, antibacterial performance and water-resisting property have been adopted as the characterization techniques. The Zeta-potential showed that the nano-Ag particles affected the size of SiO2 nanoparticles. The results showed that antibacterial activity and hydrophobic property of cotton/linen fabric increased with the increasing concentration of the AgNO3. Air permeability was not decreased considerably, whereas tensile strength was increased significantly after coating twice. The SiO2/Ag coating cotton/linen fabric had an excellent antibacterial performance. Our results demonstrate that this SiO2/Ag coated cotton/linen fabric is a step towards better hydrophobic performance of textile materials.
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 7
·4227-4243
·
IF 1.674
Deng Anquan,Zhu Yufu
TiO 2 /SiO 2 /Ag/Ag 2 O and TiO 2 /Ag/Ag 2 O nanocomposite spheres have been synthesized via a low-temperature hydrothermal method using SiO 2 spheres as templates, combined with a light-induced reduction method and a hydrogen peroxide oxidation process. Scanning electron microscopy, energy-dispersive X-ray and X-ray diffraction analyses have demonstrated that Ag and Ag 2 O nanoparticles were successfully deposited on the surfaces of TiO 2 /SiO 2 nanocomposite spheres and porous TiO 2 nanospheres forming nanoheterojunctions. The photocatalytic experiment results reveal that all the as-prepared catalysts possess improved photocatalytic activities compared with P25 nanoparticles. Both TiO 2 /SiO 2 /Ag/Ag 2 O and TiO 2 /Ag/Ag 2 O nanocomposite spheres exhibit excellent photocatalytic performances, which can be attributed to the synergistic effects of different kinds of nanoparticles. The synergistic mechanism of these nanoparticles is also discussed in detail.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Wenmin Yin,Long Wu,Fan Ding,Qin Li,Pan Wang,Jinjie Li,Zhicheng Lu,Heyou Han
To circumvent the limitations of natural antibodies, receptor, or enzyme, molecular imprinting technique has received intensive attention in analytical methods Herein, based on surface enhanced Raman scattering (SERS) molecularly imprinted polymer (SERS-MIP), a SERS-MIP sensor has been developed for the sensitive and selective detection of bisphenol A (BPA). To construct the BPA sensor, raspberry-type SiO 2 @Ag nanoparticles (SiO 2 @Ag NPs) were prepared to act as supporting substrate, and BPA was adopted as template molecule, tetraethyl orthosilicate (TEOS) as functional monomer and 3-aminopropyltriethoxysilane (APTES) as cross-linker. Due to the strong plasma resonance character of Ag NPs, the SERS-MIP sensor showed good sensitivity in the detection of BPA. The core-shell and satellite-like structure of the SiO 2 @Ag composites could provide a large surface area for BPA recognition by molecular binding domains. In addition, the sensor could prevent interferences such as 4,4′-(Hexafluoroisopropylidene) diphenol (BPAF) and 4,4′-Dihydroxybiphenyl (DOD). Moreover, the real water samples were tested to verify the reliability and feasibility of the method. Under the optimal conditions, the proposed method behaved good analytical performance to BPA with a wide linear range from 1.75 × 10 −11 to 1.75 × 10 −6 M and a detection limit of 1.46 × 10 −11 M.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Dingming Yu,Lifang Liu,Bin Ding,Jianyong Yu,Yang Si
Water-borne pathogenic diseases significantly threaten human health and the global economy, and traditional water disinfection strategies such as chlorination or membrane filtration to remove pathogens still suffer from harmful byproducts, biofouling, and limited handling capacity. Here, a bottom-up strategy is reported to develop biomimetic nanofibrous aerogels with superelastic and conductive networks by assembling Ag nanowires in a 3D SiO 2 nanofibrous skeleton via freeze-drying method for safe and efficient water disinfection. Inspired by the prey capture behavior of spiders using their webs, the core of this design is constructing spanning and interconnected networks with millions of conductive nanotips, which could inactivate microbes instantaneously based on the synergistic effect of interception and electroporation. Benefitting from the high porosity (99.81 %), superelasticity, and robust structural stability of the resultant aerogels, an electroporation-disinfection device (EDD) equipped with aerogels exhibits superior bactericidal (>99.9999 %) and virucidal (>99.9 %) performances at low derive voltage (1 V) and high flux (9900 L m −2 h −1 ) with energy consumption of 0.83 Wh m −3 . This novel disinfection method provides new insights into practical water treatment in an efficient, environmental, and sustainable way.
研究领域:
环境科学
·
材料科学
·
纳米技术
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水处理
·
生物医学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）