CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Shudi Li,Wanyu Lu,Qijin Tang,Qian Xiao,Yixin Kang,Lingye Hu,Yong Huang,Chao Peng,Hao Yang
Oily wastewater as one of water pollutions has always been a hot issue in the field of chemical engineering and environment protection, and it is still challenge to separate oil water mixture effectively with low energy consumption. Polymer membranes with superhydrophilic and underwater superoleophobic properties are perfect substances for oil–water separation owning to their high separation efficiency, oil anti-adhesion and energy saving. However, these membranes are easily contaminated by microorganisms, leading to biofilms on the surfaces, and reducing their separation flux and efficiency. In order to solve the problems, sodium alginate/chitosan-Ag composite were successfully coated on commercial nylon membranes by self-assembly method, and the effects of the Ag on separation performance and biological activity of the membranes were investigated in detail. Under the optimized condition, the membrane can effectively separate oil-in-water emulsions containing anionic, cationic or non-ionic surfactants, with a maximum separation efficiency of 99.73%. More importantly, the inhibition ratios of the membrane could reach 95.42% and 98.05% against E. coli and S. aureus , respectively, and thus inhibits the formation of S. aureus biofilm, and maintain a high relative flux after being contaminated by S. aureus . The simple preparation process and incredible emulsion separation performance with antibacterial activity of composite membranes will provide great prospects for potential industrial applications.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Tao Zhao,Dazhong Zhong,Genyan Hao,Guang Liu,Jinping Li,Qiang Zhao
Metal-organic frameworks (MOFs) exhibit excellent application potential in the field of electrocatalysis. In this study, we first prepare MIL-100 nanosheets on nickel foam (MIL-100/NF) and then successfully anchor Ag nanoparticles (NPs) on the nanosheets (Ag@MIL-100/NF) for oxygen evolution reaction (OER) catalysis. This strategy dramatically improves the conductivity of MIL-100 and the Ag NPs are uniformly dispersed on the nanosheets. The Ag@MIL-100/NF catalyst has excellent electrocatalytic performance and long-term corrosion resistance, with a low overpotential of 207 mV and a long-term stability of at least 100 h at a current density of 50 mA·cm −2 . The experimental results demonstrate that this high OER catalytic performance is due to the improved charge transfer after loading Ag NPs, the combination of nanosheets and highly dispersed Ag NPs that expose more active sites and the adjusted chemical valence states of Fe and Ni in MIL-100. This work provides a surface decoration approach for the preparation of excellent catalysts directly used in the OER.
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高影响因子
ACS Omega
·
2020
·
IF 2.87
Yan Yang,Zhijie Zhang,Menghui Wan,Zhihua Wang,Yanbao Zhao,Lei Sun
Surface-enhanced Raman spectroscopy (SERS) can be applied for biological detection because of its high sensitivity and noninvasiveness for analytes. Herein, we engineer plasmonic free-standing substrates composed of Ag nanoparticles (NPs) supported on polyacrylonitrile (PAN) electrospinning nanofibrous felts as sensors for bacterial detection. Ag NPs are evenly distributed on PAN nanofibers after preimpregnation and impregnation of PAN nanofibers in Tollens’ reagent. The size and loading density of Ag NPs are tunable by adjusting the reaction time of glucose and Tollens’ reagent, thereby allowing the tuning of the surface plasmon resonance. Using 4-mercaptophenol (4-MPh) and 4-mercaptobenzoic acid (4-MBA) as probe molecules, SERS effects of Ag@PAN composite nanofibers are investigated, and the substrates allow the detection of 4-MPh and 4-MBA at a low concentration of 10–9 mol/L. Importantly, the substrates exhibit a high sensitivity of SERS performance for bacterial identification without a specific bacteria–aptamer conjugation. The SERS substrates also show good uniformity of SERS response for bacterial organelles. Furthermore, the antimicrobial property was evaluated, and the results indicate that the sample of Ag@PAN nanofiber mats possesses excellent antibacterial properties against Escherichia coli and Staphylococcus aureus.
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高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2019
·
IF 2.983
Yaohui Gao,Ziwei Hu,Jiamin Wu,Zan Ning,Jingyi Jian,Ting Zhao,Xiaochen Liang,Xingjie Yang,Zi Yang,Qinyu Zhao,Jianping Wang,Zhigang Wang,Nicoleta Elena Dina,Ana Maria Raluca Gherman,Zhengjin Jiang,Haibo Zhou
Palmatine is a protoberberine alkaloid separated from several plants and application as an anti-inflammatory and antibacterial agent in the therapy of gastrointestinal and genitourinary disorder. Thus, the fast quantification of palmatine is important in clinic medical assays. Herein, we report simple, fast and sensitive colorimetric visualization and surface-enhanced Raman spectroscopy (SERS) dual-mode detection of palmatine basing on bimetallic size tunable silver shell capped gold nanoparticles (Au@Ag NPs). Interesting, the best signals output for dual-mode sensing of palmatine were both 5 nm Ag shell thickness of Au@Ag NPs. Meanwhile, we found that the addition of NaHSO 4 significantly improves the aggregating sensitivity of Au@Ag NPs to trace palmatine. Upon exposure to 0.1 μM level palmatine, NaHSO 4 -optimized Au@Ag NPs solution exhibits a highly sensitive color change from orange to green and rapid aggregation kinetics within the initial 5 min, which can directly be seen with the naked eye and monitored by UV–vis absorbance spectra. In addition, we measured palmatine by SERS with the excellent enhancement effect of Au@Ag NPs for further increase the sensitivity and selectivity. More importantly, other protoberberine alkaloids do not interfere with this dual-mode sensor due to the different interaction force between Au@Ag NPs and these alkaloids, and the applicability of the sensor is well demonstrated in real samples with satisfactory results. This provide a fast and simple assay for the rapid detection of palmatine in traditional Chinese medicine, the limit of detection (LOD) is 0.13 μM by the naked eye and 0.10 μM by UV–vis spectroscopy. Therefore, the size-tunable of NaHSO 4 -optimized Au@Ag NPs can be used not only as a naked-eye sensor of palmatine, but also as a highly selective SERS probe.
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高影响因子
KEY ENGINEERING MATERIALS
·
2020
·
IF 0
Jian Huang,Zhe Lei,Qian Zhang,Mei Juan Su,Liang Liu
Highly active Al-based Ag dendrites SERS plasmonic substrates have been rapidly synthesized by the one-step galvanic displacement reaction without the use of any surfactants and templates. The as-prepared SERS substrates were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman spectroscopy. XRD measurements confirmed the metallic nature of the formed Ag dendrites. None of the organic additives were used in the synthesis process, which ensures the substrates surfaces are completely clean and avoiding the introduction of organic contaminants. The innovative rough bionic substrates yield a final silver dendritic structure that offers large specific surface area and high-density hotspots. Using malachite green as a model target, the Al-based Ag dendrites SERS substrates exhibited acceptable reproducibility (relative standard deviation of 23.8%) and high enhancement capacities (pushed the detection limit down to 10 pM). Importantly, these Ag dendrites could potentially be employed as highly active and cost effective flexible SERS sensors for label-free ultrasensitive detection of biomolecules.
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DOI
Energy Advances
·
2023
·Vol. 2
·期 9
·1366-1374
·
IF 0
Zhengzhe Xie,Xiaoyuan Liu,Pengpeng Jia,Yu Zou,Jiang Jiang
Replacing water oxidation by the thermodynamically more favorable glycerol oxidation reaction in a photoelectrochemical (PEC) cell is highly desirable, which can not only improve the energy efficiency of hydrogen evolution, but also produce value-added chemicals, given that glycerol is easily accessible as a major byproduct from the biodiesel industry. Herein, a BiVO4/CoV-LDHs/Ag photoanode has been fabricated via a simple electrodeposition and redox strategy, which exhibits excellent PEC activity toward glycerol oxidation. A high photocurrent density of 7.15 mA cm−2 can be achieved at 1.23 V vs. reversible hydrogen electrode, in 0.5 M Na2SO4 solution with 0.1 M glycerol under AM 1.5G illumination, which is 2.7 times that of the pristine BiVO4 photoanode. The significantly enhanced PEC performance can be attributed to the narrowed optical band gap, and improved charge separation and injection efficiencies after surface deposition of CoV-LDHs/Ag on the BiVO4 photoanode. As a result, greatly improved hydrogen production efficiency has been achieved by coupling the photo-electrochemical glycerol oxidation on the BiVO4/CoV-LDHs/Ag photoanode, with the evolved hydrogen gas (123.5 mmol m−2 h−1) nearly double that when using the pristine BiVO4 photoanode.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Ye Zhang,Jian Song,Fusheng Pan,Ying Li,Junyi Zhao,Siqi Wang,Yitong Huang,Yue Li,Zhongyi Jiang
Mimicking the efficient facilitated transport features of carrier proteins in cytomembranes, constructing facilitated transport pathways in synthetic membranes to achieve the desired performance for task-specific molecules has become attractive. Herein, heterostructured laminates (UGO) were created through in-situ growth of amine-functionalized zirconium-based metal-organic frameworks (UiO) on graphene oxide (GO) nanosheets, and subsequently used as supports to immobilize Ag + . The as-prepared Ag + @UGO were incorporated into poly (ether-block-amide) (Pebax) matrix to fabricate facilitated transport membranes for pervaporative desulfurization. Densely packed UiO on GO nanosheets increase the inter-particles connectivity of the molecular transport channels and reduce the mass transport resistance, intensifying the permeability. Meanwhile, the uniform immobilization of Ag + can reversibly interact with thiophene via π-complexation reaction and form continuous facilitated transport pathways, significantly enhancing the selectivity. Accordingly, the resultant membrane acquires separation performance with an optimum permeation flux of 23.40 kg/(m 2 h) and enrichment factor of 7.12, achieving 52% and 57% higher than the pristine membrane. This study extends strategies to design high-performance hybrid membranes with facilitated transport mechanism through the well-designed heterostructures as supports to immobilize carriers for molecular separations.
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高影响因子
Chinese Physics B
·
2016
·Vol. 25
·期 8
·088201
·
IF 1.436
Chao Li,Jun-Jie Sun,Duo Chen,Guang-Bing Han,Shu-Yun Yu,Shi-Shou Kang,Liang-Mo Mei
A facile step-by-step approach is developed for synthesizing the high-efficiency and magnetic recyclable Fe3O4@SiO2@Ag@Ni trepang-like nanocomposites. This method involves coating Fe2O3 nanorods with a uniform silica layer, reduction in 10% H2/Ar atmosphere to transform the Fe2O3 into magnetic Fe3O4, and finally depositing Ag@Ni core-shell nanoparticles on the L-lysine modified surface of Fe3O4@SiO2 nanorods. The fabricated nanocomposites are further characterized by x-ray diffraction, transmission electron microscopy, scanning electron microscope, Fourier transform infrared spectroscopy, and inductively coupled plasma mass spectroscopy. The Fe3O4@SiO2@Ag@Ni trepang-like nanocomposites exhibit remarkably higher catalytic efficiency than monometallic Fe3O4@SiO2@Ag nanocomposites toward the degradation of Rhodamine B (RhB) at room temperature, and maintain superior catalytic activity even after six cycles. In addition, these samples could be easily separated from the catalytic system by an external magnet and reused, which shows great potential applications in treating waste water.
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高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 37
·375603
·
IF 3.551
Guoyue Qiao,Qinqin Xu,Aiqin Wang,Dan Zhou,Jianzhong Yin
Herein, the desorption effect of supercritical CO2 (scCO2) was utilized to obtain sub-5 nm Ag nanoparticles (NPs) with a high Ag loading in SBA-15. The size of the Ag NPs decreased from 3.54 ± 0.79 nm (Ag loading of 25.3 wt.% wt.%) to 2.38 ± 0.68 (Ag loading of 10.5 wt%) nm by changing the depressurization curve from 0.1 MPa min−1 (20–14 MPa) to 3 MPa min−1 (20–12 MPa). Meanwhile, the intensity of the crystalline Ag characteristic peaks was obviously higher than the latter sample from the x-ray diffraction (XRD) patterns. However, compared with the adsorption kinetics of the two precursors of AgNO3 and Cu(NO3)2 on SBA-15, under the same deposition and depressurization conditions, when the two depositional systems used water as a co-solvent, the time taken to reach the adsorption equilibrium of Ag+ on the supports was longer than the time taken by Cu2+, which existed in the water as [Cu(H2O)4]2+. The surface of SBA-15 was hydrophilic, and then the interaction of Ag+ and the surface was weaker compared with Cu2+, making Ag+ highly dispersed on the surface under the scCO2 desorption effect. After calcination, the size of the Ag NPs decreased, but the morphology of CuO was mainly characterized by nanorods (NRs). Moreover, by comparing the experiments of wetness impregnation, the dispersion ability of the bulk scCO2 of the reactor was inefficient for Ag+ adsorbed on the channels in the depressurization process.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yijun Fu,Yue Cheng,Qufu Wei,Yahong Zhao,Wei Zhang,Yumin Yang,Dawei Li
Single function of biomass aerogel restricts its further development, multifunctional biomass aerogel is becoming an urgent need. In this work, multifunctional biomass composite aerogel was prepared by co-modifying MXene and Ag nanowires (AgNWs) on bacterial cellulose/chitosan (BC/CH) composite aerogel through a facile method combining physical mixture, lyophilization and electrostatic adsorption. The as-prepared BC/CH/MXene/AgNWs composite aerogel could be applied as health monitoring sensor and photo-thermal antibacterial material. As a sensor, it showed high sensitivity, short response time, and satisfactory cycling stability for health monitoring. Moreover, the composite aerogel was successfully employed to monitor various human body motions including foot movements, elbow movements, wrist movement, respiration, and throat vibration pronunciation. In addition, the composite aerogel displayed excellent photothermal conversion performance, which could be quickly heated to more than 60 °C in 60 s under NIR laser irradiation (808 nm, 0.6 W/cm 2 ). The BC/CH/MXene/AgNWs composite aerogel showed nearly 100% sterilizing effect due to the synergistic antibacterial effect from common antibacterial role of CH/AgNWs and photo-thermal antibacterial role of MXene. The novel aerogel possesses more response characteristics and better antibacterial property than existing biomass aerogels, which may develop potential application prospect in wearable and implantable bioelectronic material for health monitoring.
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高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2023
·
IF 10.9
Kexin Dong,Chuqi Shen,Ruyu Yan,Yanping Liu,Chunqiang Zhuang,Shijie Li
The escalating presence of pharmaceutical antibiotics in natural water poses an overwhelming threat to the sustainable development of society. Photocatalysis technology stands out as a promising and cutting-edge environmental purification alternative. C 3 N 5 , identified as a distinctive nonprecious nonmetal photocatalyst, holds potential for environmental protection. However, challenges persist originating from the sluggish photoreaction kinetics and severe photo-carrier reunion. Currently, the design of a special S-scheme photosystem proves to be a reliable strategy for obtaining outstanding photocatalysts. In this context, a plasmonic S-scheme photosystem involving Ag/Ag 3 PO 4 /C 3 N 5 was developed through a feasible route. The compactly connected 0D/0D/2D Ag/Ag 3 PO 4 /C 3 N 5 heterostructure, benefitting from the synergy between the plasmonic effect and the S-scheme junction, facilitates the efficient utilization of appreciably reinforced sunlight absorption, effective photo-carrier disassociation, and notable photoredox capacity. Consequently, this system generates •OH and
⋅ O 2 - effectively. Ag/Ag 3 PO 4 /C 3 N 5 demonstrates a superb photocatalytic levofloxacin eradication rate of 0.0362 min −1 , marking a substantial advancement of 24.8, 1.1, and 0.7 folds compared to C 3 N 5 , Ag 3 PO 4 , and Ag 3 PO 4 /C 3 N 5 , respectively. Impressively, Ag/Ag 3 PO 4 /C 3 N 5 delivers remarkable anti-interference performance and reusability. This achievement signifies a significant step toward developing potent C 3 N 5 -involved photosystems for environmental purification. Download: Download high-res image (106KB) Download: Download full-size image
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Yun Wang,Zhiyuan Pan,Sihan Feng,Lijie Gao,Xuejiao Wang,Qi Zhu,Ji-Guang Li
Near-infrared (NIR)-emitting phosphors with high quantum efficiency and thermal stability are crucial to NIR pc-LEDs. Garnet-structured (GdLuCa)(Al4–zSiCrz)O12 (z = 0.01–0.2) and (Gd2–xLuCax)(Al4.95–xSixCr0.05)O12 (x = 0.2–1.0) new phosphors with promising NIR luminescence under blue light excitation were designed and fabricated by a solid-state reaction in this work. It was analyzed that the Ca2+, Cr3+, and Si4+ ions would replace Gd3+ in [GdO8], Al1 in [Al1O6], and Al2 in [Al2O4], respectively, and the optimal Cr3+ content is z = 0.05, above which concentration quenching would occur via an electric dipole–dipole interaction. Increasing Ca2+/Si4+ substitution up to x = 1.0 led to luminescence enhancement by a factor of up to 1.85 and internal/external quantum efficiency (%) increment from ∼25.9/10.7 to 63.4/27.5, and all of the phosphors showed excellent thermal stability (I423 K/I298 K ≥ 87.6%). The luminescence properties of Cr3+ were discussed in detail through systematic investigation of the effects of Cr3+ and Ca2+/Si4+ contents on the crystal structure, local coordination, and crystal field. With the NIR pc-LED device integrated from the optimal phosphor (x = 1.0) and a blue LED chip, electroluminescence manifested potential applications in night vision and medical diagnosis.
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PubMed
高影响因子
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