ACS Applied Materials & Interfaces
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2023
·
IF 9.5
Wenxiu Wu,Naiyuan Guo,Yixuan Zhang,Guoxu Liu,Leiting Yu,Xiaowei Ma,Wei Li,Minfang Chen
A suitable conductive ink for office inkjet printers is important for the convenient design of flexible electrodes for triboelectric nanogenerators (TENG). Ag nanowires (Ag NWs) easily printed with an average short length of 1.65 μm were synthesized by using soluble NaCl as a growth regulator and adjusting the amount of chloride ion. The water-based Ag NWs ink with a low solid content of 1% but with low resistivity was produced. The printed flexible Ag NWs-based electrodes/circuits showed excellent conductivity with RS/R0 values kept at 1.03 after bending 50,000 times on PI substrate and an excellent anticlimate property in acidic conditions for 180 h on polyester woven fabric. The sheet resistance was reduced to 4.98 Ω/sqr heated at 30–50 °C for 3 min by a blower due to the formed excellent conductive network when compared to Ag NPs-based electrodes. Finally, the integration of printed Ag NWs electrode and circuits was applied to the TENG, which can be used to predict a robot’s out-of-balance direction by the change of the TENG signal. In all, a suitable conductive ink with a short length of Ag NWs was fabricated, and flexible electrodes/circuits can be conveniently and easily printed by office inkjet printers.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Jing Sun,Zhichang Ma,Hemeiling Cai,Junwei Di
A photoelectrochemical dopamine sensor based on BiOI and AuAgNPs nanoparticles modified indium tin oxide (ITO) electrode was prepared successfully. The noble metal material AuAg significantly improved the shortcomings of poor surface conductivity and easy recombination of photogenerated electron holes in BiOI. The prepared electrode generated a significantly enhanced and stable photocurrent signal under Xe lamp irradiation. In addition, in weak acidic electrolyte solution , dopamine molecules were protonated and preferent existed in the form of cations, which were easily attracted by electrostatic and adsorbed on the surface of negatively charged AuAgNPs. As an electron donor , DA is vulnerable to oxidation to DA + by BiOI holes, resulting in an increased anodic photocurrent. The detection limit was 0.3 pM (S/N = 3) and the dopamine concentration exhibited a nice linear relationship between 1 pM and 0.1 μM under ideal circumstances. The dopamine photoelectrochemical sensor shown strong sensitivity, a broad linearity range, and good selectivity against potential uric acid and ascorbic acid interference. This work provides a promising PEC detection platform for the detection of small and medium-sized molecules in biological analysis.
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ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Di Liu,Huimin Gao,Wenji Jiang,Su Yan,Hao Liu,Junjie Chen,Sisi Wen,Wei Zhang,Xu Wang,Bing Zhao,Wei Song
In this work, three-dimensional (3D) Ag aerogel-supported Hg single-atom catalysts (SACs) were explored as an efficient surface-enhanced Raman scattering (SERS) substrate to monitor the enhanced oxidase-like reaction. The influence of the concentrations of Hg2+ to prepare 3D Hg/Ag aerogel networks on their SERS properties to monitor the oxidase-like reaction has been investigated, and a specific enhancement with an optimized addition of Hg2+ has been achieved. The formation of Ag-supported Hg SACs with the optimized Hg2+ addition was identified from a high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) image and X-ray photoelectron spectroscopy (XPS) measurement at an atomic level. This is the first discovery of Hg SACs for enzyme-like reaction applications inferred by SERS techniques. And density functional theory (DFT) was used to further reveal the oxidase-like catalytic mechanism of Hg/Ag SACs. This study provides a mild synthetic strategy to fabricate Ag aerogel-supported Hg single atoms to display promising prospects in various catalytic fields.
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RSC Advances
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2019
·Vol. 9
·期 4
·2244-2251
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IF 3.049
L. Du,T. Li,S. Wu,H. F. Zhu,F. Y. Zou
In this study, polyvinyl alcohol (PVA) nanofibrous membranes containing silver nanoparticles (Ag NPs) were successfully fabricated by the combination of electrospinning and a green reduction approach. Through the electrospinning technique, uniform and smooth nanofibres can be obtained, and the Ag NPs with a narrow size distributions are well dispersed in PVA nanofibres. The investigation indicates that the mass ratio of reductant tea polyphenols and AgNO3 play a crucial role in controlling the size of the Ag NPs. More importantly, multi-layered fabrics with a layer of PVA/Ag NP nanofibrous membrane layered onto cotton substrates were developed and applied to shoe insoles. The fabricated shoe insoles with functionalized PVA nanofibres exhibit remarkable antimicrobial activity against both E. coli and S. aureus (i.e. antibacterial rate > 99%). The creation of such an encouraging fabric could establish a new optimization methodology for producing nanoengineered functional textiles.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
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IF 4.084
Yuan Yao,Mingxuan Sun,Zihan Zhang,Xiaojing Lin,Bowen Gao,Sambandam Anandan,Wei Liu
A ternary composites of MoO 3 /Ag/TiO 2 nanotube arrays were synthesized by in-situ annealing of TiO 2 nanotube arrays impregnated with AgNO 3 over MoO 3 powders. During the annealing process , the crystallization of the TiO 2 nanotubes, the thermo-decomposition of AgNO 3 to Ag nanoparticles , and the sublimation of MoO 3 occur jointly. The photoelectrochemical measurements of the resultants indicate that MoO 3 /Ag/TiO 2 nanotube arrays present better photoelectrochemical properties compared with Ag/TiO 2 nanotube arrays and pristine TiO 2 nanotube arrays. Especially, the highest photocurrent and open circuit voltage are up to 21.29 μA/cm 2 and 0.058 V under visible light irradiation , whereas 1.77 and 3.87 times larger than those of TiO 2 nanotube arrays, respectively. Superior photoelectrochemical stability and larger photo-conversion efficiency of the ternary composites are also demonstrated. The improved photoelectrochemical properties are related to the close interfacial contact among MoO 3 , Ag, and TiO 2 as well as the surface plasma resonance of Ag in the ternary composites, which broaden the range of light response and enhance the efficiency of charge separation. This study provides a skillful solution to construct TiO 2 -based composite materials and demonstrates it is an unique architecture to promote the visible light driven photocatalytic application of TiO 2 .
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Nanomaterials
·
2019
·Vol. 9
·期 3
·393
·
IF 4.034
Weili Li,Hongchao Geng,Lu Yao,Kesheng Cao,Pengtao Sheng,Qingyun Cai
Here we present the photoelectrocatalytic hydrogen generation properties of CdS passivated ZnCuInSe (ZCISe) quantum dots (QDs) supported by TiO2nanowires decorated with Ag nanoparticles. In this configuration, Ag nanoparticles were sandwiched between the photo-electrons collector (TiO2) and photo-sensitizers (ZCISe), and acted as an electron relay speeding up the charge carrier transport. ZCISe and CdS enabled the optical absorption of the photoelectrode ranging from ultraviolet to near infrared region, which significantly enhanced the solar-to-chemical energy conversion efficiency. A photocurrent of 10.5 mA/cm2and a hydrogen production rate of about 52.9 μmol/h were achieved under simulated sunlight (1.5 AG).Keywords:ZCISe QDs;TiO2nanowires;photocatalytic;hydrogen generation
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INORGANIC CHEMISTRY
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2018
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IF 4.7
Lei Ji,Xifeng Shi,Abdullah M. Asiri,Baozhan Zheng,Xuping Sun
Electrochemical reduction has been regarded as a sustainable strategy to tackle energy-intensive operations by the Haber–Bosch process achieving catalytic conversion of N2 to NH3 under mild conditions. However, the challenge of N2 electroconversion emphasizes the requirement of efficient electrocatalysts. In this paper, we report the development of porous bromide-derived Ag film (BD-Ag/AF) as an efficient electrocatalyst for N2 reduction reaction. During electrochemical test, Br– anions are released and adsorbed onto the surfaces of the electrode, suppressing hydrogen evolution reaction. Such BD-Ag/AF shows a high Faradaic efficiency of 7.36% at −0.6 V vs reversible hydrogen electrode in 0.1 M Na2SO4, which is higher than that (0.38%) of porous Ag film without Br– anions. Moreover, it exhibits excellent long-term electrochemical durability.
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ACS Applied Bio Materials
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2018
·
IF 0
Yunlin Pan,Pengfei Yang,Mark G. Moloney,Liang Wang,Feng Ma,Yongqing Wang
An amino-substituted bis(aryldiazomethane) was synthesized and used to modify cotton fibers by a carbene insertion reaction. A subsequent amidation of the modified cotton fibers introduced thioether groups onto the surface. Thus, three different types of cotton fibers with hydroxyl, amine, or thioether groups were expected to bind silver nanoparticles (Ag NPs), which were characterized by scanning electron microscopy to show the surface morphology, as well as X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, and thermogravimetric analysis to quantify the loading of Ag NPs. A bioassay experiment showed antibacterial activity of the modified cotton fibers. The development of these antibacterial cotton fibers not only gave a clear and deep comparison of different silver-binding approaches but also had potential industrial and daily applications for medical textiles.
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APPLIED ORGANOMETALLIC CHEMISTRY
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2018
·Vol. 33
·期 3
·e4683
·
IF 3.581
Jiang Li,Xiaolu Zhu,Fengxian Qiu,Tao Zhang,Fengping Hu,Xiaoming Peng
Introducing plasmonic metals into semiconductor materials has been proven to be an attractive strategy for enhancing photocatalytic activity in the visible region. In this work, a novel and efficient Ag/Ag 2 WO 4 /g-C 3 N 4 (AACN) ternary plasmonic photocatalyst was successfully synthesized using a facile one-step in situ hydrothermal method. The composition, structure, morphology and optical absorption properties of AACN were investigated using X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and UV–visible diffuse reflectance spectroscopy, respectively. Photocatalytic performance of AACN was evaluated via rhodamine B and tetracycline degradation. The results indicated that AACN had excellent photocatalytic performance for rhodamine B degradation with a rate constant of 0.0125 min −1 , which was higher than those of Ag 2 WO 4 and Ag/Ag 2 WO 4 . Characterization and photocatalytic tests showed that the strong coupling effect between the Ag/Ag 2 WO 4 nanoparticles and the exfoliated ultrathin g-C 3 N 4 nanosheets was superior for visible-light responsivity and reduced the recombination rate of photogenerated electrons and holes. A proposed mechanism is also discussed according to the band energy structure and the experimental results.
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Environmental Science-Nano
·
2019
·Vol. 6
·期 11
·3307-3315
·
IF 7.704
Xiaocui Yin,Penghui Shao,Lin Ding,Yu Xi,Kai Zhang,Liming Yang,Hui Shi,Xubiao Luo
Selective capture and direct recovery of silver ions from highly acidic wastewater are desirable but challenging for sustainable remediation of contamination. In this work, contraposing the characteristics of actual Ag-polluted water, poly-allylrhodanine (PAR) is designed and synthesized as an adsorbent. Different from most reported adsorbents, PAR features a unique acidity-enhanced adsorptivity property, thus achieving an ultrahigh capacity (651.0 mg g−1) and outstanding selectivity (>100) in the capture of Ag+ from wastewater with strong acidity (pH −0.2). Moreover, the purity of the reclaimed Ag+ reaches up to 99.80%, delivering an enormous economic benefit. Further characterization and theoretical calculations uncover that the CS and C–S groups on PAR act as adsorption sites to coordinate the Ag+ ions via a special pH-dependent protonation exchange mechanism. In the treatment of actual Ag-polluted water, the treatment capacity of PAR is as high as 4015 bed volumes (BV) per run at pH = −0.2, which is 100-fold higher than that of commercial resin, highlighting its great potential in practical applications. The wastewater feature-directed design concept and the high-performance adsorbent of PAR reported in this work may be helpful to fill the gap between the experimental laboratory and practical remediation of Ag-containing wastewater.
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JOURNAL OF HAZARDOUS MATERIALS
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2019
·
IF 7.65
Nan Jiang,Cheng Qiu,Lianjie Guo,Kefeng Shang,Na Lu,Jie Li,Ying Zhang,Yan Wu
Plasma-assisted catalytic degradation of xylene was performed in a pulsed sliding dielectric barrier discharge (SLDBD) reactor based on three-electrode geometry over Ag-Mn bimetallic oxides catalysts at room temperature. Experimental results showed that more active species were distributed uniformly in the SLDBD plasma than traditional surface dielectric barrier discharge (SDBD), contributing to higher degradation and energy performance. The xylene degradation efficiency and energy yield in the SLDBD reactor driven by both + pulse ( + 18 kV) and –DC (–10 kV) were 40% and 2.3 g/kWh higher, respectively, than in the SDBD reactor energized by +pulse alone. The combination of SLDBD plasma with catalysts significantly improved the xylene degradation efficiency and CO 2 selectivity than the plasma-only system. The incorporation of Ag into Mn oxide further enhanced its catalytic activity for xylene degradation, and the catalytic activity of Ag-Mn oxides was closely correlated with the Ag/Mn molar ratio. Ag-Mn/γ-Al 2 O 3 (1:2) presented the best performance in plasma-catalysis process, with 91.5% of degradation efficiency and 80.1% of CO 2 selectivity at 4.6 W. The higher proportion of surface O ads and better reducibility through the interaction between Ag and Mn species can explain the excellent reactivity of Ag-Mn/γ-Al 2 O 3 (1:2).
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Qiaoyue Xi,Ge Gao,Manyu Jin,Yanqun Zhang,Hua Zhou,Cunqi Wu,Yongxia Zhao,Lidan Wang,Pengran Guo,Jingwei Xu
A novel ternary photocatalytic nanocomposite, Ag–Cu 2 O/C 3 N 4 , has been successfully synthesized via a facile two-step reduction procedure at room temperature, wherein Ag nanoparticles are directly growing on the surface of Cu 2 O supported by C 3 N 4 nanosheets. The resulting ternary Ag–Cu 2 O/C 3 N 4 photocatalyst exhibits enhanced photocatalytic activity towards methyl orange (MO) degradation compared with its counterparts (Cu 2 O, spherical Ag–Cu 2 O and Cu 2 O/C 3 N 4 ), demonstrating a removal rate of MO up to 95.7% within 30 min. The enhanced photocatalytic activity can be ascribed to the following factors: (1) the surface plasmon resonance effect of Ag nanoparticles broadening the visible light response of Cu 2 O; (2) the introduction of C 3 N 4 functioning not only as a fast electron delivery but also a fine stabilizer to prevent the Ag–Cu 2 O composite from agglomeration. Mechanism studies reveal that MO is cracked into smaller fragments and the h + is the main reactive species participating in the photocatalytic process. Moreover, the Ag–Cu 2 O/C 3 N 4 photocatalyst also shows high photodegradation ability for another two representative azo dyes, acid orange II and congo red. This study demonstrates the potential of Ag–Cu 2 O/C 3 N 4 in the degradation of azo dyes and also provides a guide to design of Cu 2 O-based ternary photocatalysts for further wastewater remediation.
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