ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Hamidreza Abadikhah,Ehsan Naderi Kalali,Samaneh Khodi,Xin Xu,Simeon Agathopoulos
High desalination performance, dye retention, and antibacterial properties were achieved with a multifunctional thin-film nanocomposite (MTFN) membrane, fabricated by the incorporation of a novel nanocomposite structure of reduced graphene oxide@TiO2@Ag (rGO@TiO2@Ag) into the polyamide active layer. The specific characteristics of the graphene-based nanocomposite, synthesized by the microwave-assisted irradiation process, favored water channelization and provided superhydrophilicity and antibacterial properties to the MTFN membranes. In comparison with the conventional methods, such as multistep chemical process using strong agents for reduction and long-term energy-consuming hydrothermal process, microwave irradiation facilitated a green, fast, and cost-effective route for the fabrication of GO-based nanocomposites for multifunctional applications. Interfacial polymerization was performed on a polyethersulfone/Si3N4 robust hollow fiber substrate using m-phenylenediamine aqueous solution and 1,3,5-benzenetricarbonyltrichloride organic solution. The structural and chemical characteristics of the synthesized nanocomposites and the MTFN membranes were thoroughly studied by a series of characterization analyses (transmission electron microscopy, field emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and atomic force microscopy). The physicochemical properties and the nanofiltration performance of the MTFN membranes were investigated after the incorporation of rGO@TiO2@Ag at various concentrations. The water contact angles confirmed the superb surface hydrophilicity of the MTFN membranes. High permeability (52 L·m–2·h–1), desalination (96% for 1 g/L Na2SO4 feed solution), and dye retention (98% for 0.5 g/L rose bengal feed solution) were recorded for MTFN enriched with 0.2 wt % rGO@TiO2@Ag. A 90% reduction in the number of viable bacteria (Escherichia coli), after 3 h of contact with MTFN membranes, confirmed the superior antibacterial activity of the produced membranes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 4
·2211-2218
·
IF 1.093
Tao Cai-Hong,Chen Tiandi,Ma Fusheng,Liu Hui,Li Xiuqi,Lin Shenghong
The submicron-sized Fe3O4 particles were synthesized by solvothermal method. Then polydopamine (PDA) was used to modify the surface of Fe3O4 particles. And then the core—shell Fe3O4@PDA@BSA (single layer and multilayer)
microspheres were prepared by the layer by layer self-assembly method (SAM). In addition, Ag nanospheres were grafted onto the surface of Fe3O4@PDA particles to obtain Fe3O4@PDA-Ag core—shell nanoparticles using silver mirror reaction. The
morphology and component of the obtained core—shell particles were characterized by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The biocompatibility of the microspheres was researched in vitro by MTT method and its magnetic properties were
also evaluated. The results showed that the microsphere has excellent magnetic properties and good biological safety. Then the catalytic performance of Fe3O4@PDA-Ag microspheres for methylene blue (MB) was studied. And the antimicrobial properties of Fe3O4@PDA-Ag
microspheres for Escherichia coli and Bacillus subtilis were also be discussed. The results indicated good catalytic properties and antibacterial properties.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2018
·
IF 2.88
Jian Zhu,Tian-Tian Jia,Jian-Jun Li,Xin Li,Jun-Wu Zhao
In this work, we develop a simple and selective sensing method for the detection of mercury ions based on surface plasmon resonance (SPR) spectrum change of Au-Ag core-shell triangular nanoplates . When the concentration of mercury is increased, the etching-induced change of particle size and shape also leads to the decrease of the absorption peak at the fixed wavelength, until a spectrum dip takes place. This spectral change of “peak-to-dip” greatly enlarges the detection range of mercury ions, which could be fine tuned by changing the initial thickness of the Ag coating. Under optimal conditions, the decrease of the logarithmic absorption intensity has a good linear response with the concentration of mercury ions increasing from 10 to 1000 μM, and the limit of detection (LOD) is 0.88 μM. Interference studies and real samples test indicate that, this new sensing method has a good selection for mercury ions and can be practically used in lake water. This work shows the surface etching-induced SPR shift can also leads to the intensity change with “peak-to-dip” fashion, which greatly enlarge the concentration range of the detection and could be widely applied in the spectroscopy sensing based on SPR.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 1
·286-301
·
IF 2.993
Fang Hongbiao,Cao Xin,Yu Jiajie,Lv Xiang,Yang Nan,Wang Tianhe,Jiang Wei
Tungsten oxide (WO 3 ) is a well-known photocatalyst, but its application is restricted due to its low conduction band and reduction power. In addition, WO 3 catalyst in powder forms has little application prospect because of difficulties in separation and regeneration. In this work, we prepared WO 3 /Ag/AgCl films on conventional glass that not only have much enhanced photocatalytic capability but also can be readily regenerated. The WO 3 film was prepared on glass substrate by calcination of spin-coated W precursor. Ag/AgCl particles were then deposited on WO 3 film by an impregnating–precipitation–photoreduction method. The photocatalytic efficiency of WO 3 /Ag/AgCl was evaluated by using methyl orange (MO) and Rhodamine B (RhB) as target pollutants. The highest photocatalytic performance was achieved with the 3-WO 3 /Ag/AgCl film, being 18 and 13 times higher than that of pure WO 3 film for degradation of MO and RhB, respectively. The degradation rate for both MO and RhB by 3-WO 3 /Ag/AgCl film catalyst decreased by less than 5% after five cycled tests. The photodegradation mechanism was discussed based on the electrochemical impedance spectroscopy Nyquist tests, photoelectrochemical analysis and reactive oxygen species scavenging experiments. A possible all-solid-state Z-scheme mechanism is proposed based on the photoelectron chemical tests and radical trapping experiments. This study provides a feasible technique to prepare a photocatalytic film with practicability and reproducibility.
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Lina Xu,Xiaohua Yang,Haiyang Ding,Shouhai Li,Mei Li,Dan Wang,Jianling Xia
A simple synthesis strategy was designed and applied to synthesize nitrogen and sulfur co-doped aminated ligninsulfonate/graphene quantum dots (ASL/GQDs) composites using citric acid monohydrate and byproducts of the sulfite-pulping procedure (sodium lignosulfonate). The combination of these two materials improves surface chemical activities and electronic characteristics. As a result，the combination offers excellent photoluminescence properties and sensitivity. The fluorescence intensity of the as-prepared ASL/GQDs composites is more than three times that of the free GQDs. ASL/GQDs based fluorescent probe was applied to sensitively determine Ag + with a good linearity in a range from 0.005 to 500 μM with a correlation coefficient of 0.99. The method was also used successfully to determine the amount of Ag + in environmental water samples. Using an MTT assay, the ASL/GQDs have low toxicity and are biocompatible with A549 cells, and may be successfully used to image A549 cells.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2019
·Vol. 12
·期 6
·1375-1379
·
IF 8.515
Xu Meng,Tu Guopeng,Ji Muwei,Wan Xiaodong,Liu Jiajia,Liu Jia,Rong Hongpan,Yang Yanlian,Wang Chen,Zhang Jiatao
Utilizing vacuum-tuned-atmosphere induced dip coating method, we achieve the cross-dimensional macroscopic diverse self-assemblies by using one building block with one chemical functionality. Coordinated modulating the vacuum degree, colloid concentration and evaporation atmosphere, Au@Ag core/shell NCs can controllably assemble into diverse multi-dimensional superstructures. Under 0.08 MPa, we obtained the two-dimensional (2D) stepped superstructures with continuously tunable step width. In addition, we generated a series of tailorable nanoscale-roughened 2D Au@Ag NCs superstructures at 0.04 MPa, which exhibited the label-free ultrasensitive SERS detection for the different mutants of IAPP8-37 proteins. Under 0.01 MPa, we obtained the cross-dimensional tailorable Au@Ag NCs assemblies from random to macroscale 2D and three-dimensional (3D) densest superstructures by adjusting the capping ligand-environmental molecule interactions. This is a flexible method to generate as-prepared Au@Ag core/shell NCs into well-defined macroscopic diverse superstructures and to promote the exploitation into biological applications.
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2017
·Vol. 19
·期 37
·5565-5575
·
IF 3.474
Hui-Ze Wang,Bo Chen,Deng-Yuan Hao,Xin-Peng Miao,Dan Zhao,Ning Zhang
Pursuing a general and feasible method to construct precious metal (PM) nanostructures bounded by high-index facets (HIFs) is highly desirable for both academic and industrial interests in promising metal materials. Herein, attempts to employ modified galvanic replacement processes between MClxy− (M = Pt, Pd or Au) PM precursors and sacrificed templates of Ag nanocubic particles with deliberately introduced high [Cl−] (concentration of Cl−) were investigated to gain more acceptable HIF PM nanostructures. Typically, the Pt–Ag system was chosen as a representative system and monitored by the comprehensive characterizations of UV-vis, XRD, XPS and TEM to illuminate the evolution of the corresponding particles. It was demonstrated that the deliberately introduced Cl− at a certain concentration ([Cl−] was not lower than 1.5 M) could play dual roles in the kinetic evolution of the particles: one was dramatically lowering the etching speed to confine the reaction to the surface layers of the Ag substrates, and the other was facilitating the anisotropic etching process along the PVP-protected Ag surface through the Nernst–Einstein diffusion influence on PtCl42−, which in turn led to the formation of concave nanocubic particles with Pt-highly-dispersed [hk0] high-index surfaces (combined by the [210], [410] and [510] atomic terraces) on the Ag templates. The efficiencies of the method were further confirmed by constructing similar Pd- or Au-highly-dispersed high-index surfaces on Ag templates, suggesting that the method is a novel and general strategy to directly construct PM-based high-index surfaces with high PM dispersion in bimetallic nanostructures, which could be referenced as a solution to obtain superior precious metal materials possessing both unique HIF surface configuration and cost-saving competitiveness for advanced applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Feiya Fu,Jiayuan Gu,Jinfeng Cao,Rongsheng Shen,Hanxiang Liu,Yanyan Zhang,Xiangdong Liu,Jinping Zhou
This work proposed a straightforward and sustainable strategy to synthesize a Ag/ZnO decorated cellulose nanocomposite. First, zincate was introduced into an aqueous cellulose–NaOH/urea dope to enhance the solution stability. Second, AgNO3 was directly added into the cellulose dope without gelation, and then was reduced into Ag NPs by cellulose chain. Finally, zincate transformed into ZnO via biomimetic mineralization along with the regeneration of the cellulose dope, and an Ag/ZnO decorated cellulose nanocomposite film was synthesized. The Ag NPs with a mean diameter of 16.5 nm were well dispersed in the cellulose matrix, and some were doped on the surface of the embedded ZnO crystal. With increase of the Ag loading, the nanocomposite film showed more rapid sterilization for Escherichia coli than Staphylococcus aureus, and complete eradication could be achieved within 3 h for both bacteria. This simple and environmental friendly method hopefully provided new routes for large-scale production of antibacterial cellulose-based nanohybrids in industry.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 3
·1-13
·
IF 5.3
Wang Yutong,Liu Yizhi,Liang Xiao,Liu Zhiyuan,Yang Yaling
This study successfully developed a colorimetric/SERS dual-mode sensor for determining acrylamide in baked goods based on the excellent peroxidase-like activity and Raman activity of Fe-PHS@Au–Ag-Au Janus NPs. In colorimetric mode, the thiol-ene Michael addition between acrylamide (AA) and glutathione (GSH) efficiently eliminates GSH-induced peroxidase-like activity inhibition. The peroxidase-like activity of Fe-PHS@Au–Ag-Au Janus NPs gradually recovered, and the blue color of the solution gradually deepened with the increase in AA dosage. In surface-enhanced Raman spectroscopy (SERS), Apt-Fe-PHS@Au–Ag-Au Janus NPs can selectively capture AA and bind specifically, leading to the dissociation of Apt and Fe-PHS@Au–Ag-Au Janus NPs. The Raman activity of Apt-Fe-PHS@Au–Ag-Au Janus NPs decreases due to the dissociation of Apt. The dual-mode sensor was utilized for the determination of acrylamide in the concentrations range from 0.05 to 20 µg·L −1 with detection limits of 0.06 µg·L −1 (SERS) and 0.01 µg·L −1 (colorimetric). The recovery in baked samples was between 91.0 and 108.0%. Graphical
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jianghui Zhao,Wanlong Li,Lele Li,Quan Feng,Siew Chun Low,Soon Huat Tan,Zhi Liu
Microorganism contamination of evaporators can deteriorate their performance during solar-driven water evaporation. Herein, we developed a biomimetic core-shell nanofibrous membrane with enhanced solar absorption, water replenishment, and antimicrobial properties via modification of silver nanoparticles (Ag-NPs). By mimicking the core-shell structure of natural pine needles, (1) the core of polyvinylidene fluoride hexafluoropropylene (PVDF-HFP) nanofiber, like the xylem of pine needles, can act as a support skeleton for dimensional stability; and (2) the shell of Ag-NPs-modified copper oxide (CuO) crystals (Ag@CuO), like the mesophyll of pine needles (photosynthesis for pine growth), can perform the photothermal and antimicrobial properties. The Ag@CuO nanofibrous membrane achieved increased solar absorption from 92.44 % to 95.88 % and decreased water contact angle from 36.1° to 0° after the incorporation of Ag-NPs. Furthermore, the Ag@CuO nanofibrous membrane exhibited stable evaporation rates of 1.31 kg⋅m −2 ⋅h −1 for 3.5 wt% saline water and 1.27 kg⋅m −2 ⋅h −1 for actual dye wastewater. Moreover, the nanofibrous membrane possessed excellent flexibility and robust adhesion of Ag-NPs due to the strong interfacial bonding induced by polydopamine. In addition, inhibition rates above 99.97 % against Staphylococcus aureus and Escherichia coli demonstrated the outstanding antimicrobial properties of the Ag@CuO membrane. In conclusion, the high evaporation performance, excellent flexibility, and outstanding antimicrobial properties enable the Ag@CuO nanofibrous membrane to be a good option for sustainable clean water production by treating evaporation media containing microorganisms.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2016
·Vol. 24
·期 1
·45-54
·
IF 1.385
Ma Jing,Xu Shangyuan,Chu Jia,Xue Juanqin,Tang Jieli,Qiang Liangsheng
In this paper, a series of metal supported TiO 2 /SBA-16 photocatalysts were successfully synthesized by wet impregnation method. The synthesized samples were characterized by X-ray diffraction (XRD), Raman spectra, N 2 adsorption–desorption, transmission electron microscopy (TEM), UV–visible absorption spectra (UV-vis) and X-ray photoelectron spectroscopy (XPS). It was found that SBA-16 retained the ordered mesostructure after modification. The results shown that loading different metal elements was found to have significant influences on the crystallographic structure and physical properties. Moreover, the prepared materials were evaluated on photodegradation of Rhodamine B (RhB). Experiment results showed that the degradation of RhB by these catalysts follows the pseudo-first-order kinetic model. The effect of metal element on photocatalytic activity can be attributed that the appropriate amounts of metal concentration can enhance the photocurrent due to the reduced electron–hole recombination, which can improve the efficiency of photocatalytic reactions.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 6
·期 4
·3186-3197
·
IF 3.84
Zhifeng Jiang,Jimin Xie
Novel visible-light-driven Ag/Ag2O@g-C3N4 (AAC) hybrid materials were synthesized successfully via a green, facile hydrothermal treatment approach by reducing AgNO3 using carbon nanodots as reducing agent for the first time. Natural leaves were used as precursors to prepare carbon nanodots. By adjusting the feed mass ratio of AgNO3 to carbon nanodots, the average diameter of Ag/Ag2O can be modulated from 8 to 33 nm. The effects of Ag/Ag2O deposition on the optical and photocatalytic performance of AAC in the degradation of rhodamine B (RhB) under visible light irradiation were systematically investigated. It was found that the Ag/Ag2O content greatly influences the photocatalytic activity of AAC nanocomposites. A suitable amount of Ag/Ag2O in the AAC system could obtain the best photocatalytic activity. The experimental results indicated that all the AAC nanocomposites showed higher photocatalytic activities compared with that of pure g-C3N4. The remarkable visible-light photocatalytic activity of AAC heterostructures could be attributed to their absorption in the visible region and low recombination rate of the electron–hole pairs because of the heterojunction formed between Ag2O and g-C3N4. In addition, Ag nanoparticles are believed to play an essential role in affecting the photoreactivity because they are able to trap electrons, further separate the electron–hole pairs, and prolong the life of electron–hole pairs. In other words, it can be concluded that the increased photocatalytic activity of AAC was attributed to the synergic effect between g-C3N4, Ag2O and Ag. It is believed that the present work could render useful information for steering the design and application of noble nanoparticle loaded g-C3N4-based heterojunction composites with high photocatalytic activity.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）