FIBERS AND POLYMERS
·
2020
·Vol. 21
·期 3
·505-512
·
IF 1.797
Gao Dangge,Liu Jingjing,Lyu Leihong,Li Yajuan,Ma Jianzhong,Baig Warda
Ag deposited ZnO (Ag/ZnO) nano materials with different Ag molar content were prepared via chemical precipitation method. The morphology of nano ZnO was rod like, while the size was 170 nm in length and 30 nm in diameter. Silver nanoparticles were found to be spherical with the diameter about 15 nm. When it deposited on the surface of the nano ZnO, the size of the nano ZnO was almost unchanged when the doping amount is 2.5 %. All the samples were treated on cotton fabric, and the laden fabric had excellent performance on hydrophobicity, including UV resistance, antibacterial activity and anti-mildew. The contact angle of fabric loaded with 3 % Ag/ZnO was 139 compare to nano ZnO, which was 103°. The fabric loaded with Ag/ZnO had superior performance of UV resistance. With the increase of depositing amount, the antibacterial rates were promoted; the antibacterial rates against S. aureus , E. coil , and C. albicans of fabric with 3 % Ag/ZnO were promoted to 91 %, 96 % and 98 %. Moreover, Ag/ZnO gave cotton fabrics good anti-mildew performance, especially A. flavus , and its anti-mildew effect could reach 0 grade.
研究领域:
材料科学
·
纺织功能材料
·
纳米复合材料
·
表面改性
·
抗菌材料
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Xueyan Chen,Honghong Wang,Min Chen,Xiaoxiao Qin,Hong He,Changbin Zhang
Ag-based catalysts are shown to be efficient for formaldehyde (HCHO) oxidation at low temperature, while the role of active Ag species in this reaction remains a controversial issue. In this work, we prepared Ag/TiO 2 catalysts with TiO 2 of different crystal structures (anatase or rutile) as supports and tested their performances in HCHO oxidation. We observed that the crystal structure of the TiO 2 support had a significant influence on the activity of the Ag/TiO 2 catalysts, and Ag/A (anatase) exhibited dramatically superior activity compared with Ag/R (rutile). More interestingly, we observed a clear inflection point in the HCHO conversion curve for the Ag/R catalyst. Combining the results of BET, XRD, TEM, XAFS, H 2 -TPR characterization and DFT calculations, we show that HCHO oxidation on Ag/TiO 2 catalysts is a co-function process of multiple active sites including surface oxygen, Ag 2 O, and metallic Ag species. The low-temperature non-renewable surface oxygen and Ag 2 O species mainly contribute to HCHO oxidation in the low-temperature range, while metallic Ag species are primarily responsible for the reaction at high temperature since metallic Ag is capable of activation of oxygen at high temperature. The relative contents of surface oxygen, Ag 2 O and metallic Ag species are different on the Ag/A and Ag/R catalysts. The dispersion degree of metallic Ag species also differs on the Ag/A and Ag/R, therefore their capacities for oxygen activation are quite dissimilar. The above factors combine to result in distinct catalytic behaviors for Ag/A and Ag/R in HCHO oxidation, as well as the appearance of an inflection point.
研究领域:
催化化学
·
环境化学
·
材料科学
·
表面科学
·
物理化学
✓ 已验证
DOI
高影响因子
International Journal of Coal Science & Technology
·
2026
·Vol. 13
·期 1
·51
·
IF 10.1
Deng Wenyao,Bao Guirong,Li Kongzhai,Wang An,Ji Xuewu,Liu Li,Gao Peng,Wang Hua,Luo Jia
C = C and C = O selective hydrogenation in aromatic compounds is a key capability of supported active metal catalysts, leading to numerous practical applications. Here, carbon dots (CDs) material was produced by microwave-assisted hydrothermal method, and used as the carrier and reducing agent to develop PdAg/CDs composite catalyst. PdAg/CDs fabricated by photochemical reduction with UV-light demonstrated high selectivity for hydrogenation of cinnamic aldehyde (CAL) into hydrocinnamic alcohol (HCOL). With PdAg/CDs, 100% of CAL conversion and 90.0% of selectivity to HCOL were obtained at 140 °C, 3 h and 1 MPa H 2 in water. The improved catalytic performance of the PdAg/CDs catalyst was mainly due to the formation of Pd-Ag alloy and synergetic effect between Pd and Ag.
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DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Yu Xifeng,Zhao Yong,Liu Sijia,Tian Fayou,Zhang Yinghua,Li Hui,Yang Siwen,Ren Hao,Li Zhongtao,Lin Yan
Direct electrochemical ethylene epoxidation using water as the oxygen source offers a sustainable alternative to conventional thermal processes, but practical implementation is constrained by insufficient ethylene adsorption and the inherent instability of the critical OO* intermediate. Here we show that a CuO/Ag catalyst engineered with coupled strain and electronic properties promotes exposure of metastable Ag(111) facets to strengthen ethylene adsorption and establishes a dual-reagent confinement system that enriches H 2 O and C 2 H 4 at respective interfacial domains. Characterization and simulation reveal that dynamic charge oscillations at the interface induce an electron flow from Ag to CuO, which facilitates C=C bond activation and stabilizes the OO* intermediate by suppressing O–O bond cleavage. In a membrane electrode assembly reactor, a stable ethylene oxide production rate of 345 μmol·cm −2 ·h −1 is achieved at 50 mA·cm −2 over 60 hours, with a Faradaic efficiency of 45.6% and a selectivity of 92.8%. This work validates interfacial strain and electronic properties as a viable strategy for sustainable electrified synthesis, as exemplified by the continuous direct epoxidation of ethylene.
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产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 38
·e03531
·
IF 2
Yun Li,Xiaoying Liu,Jinpeng Xue,Jingyi Ma,Xing Li,Wensheng Yang
Silver is widely used in daily life and industry, resulting in environmental release and potential health risks from toxic silver ions (Ag + ). In this study, a paper-based colorimetric sensing strategy utilizing ascorbic acid (AA)-modified gold nanoparticles (AA@AuNPs) was developed for the rapid and portable detection of silver ions in various aqueous matrices. Under optimized conditions, AA coordinates the AuNP surface and promotes the formation of an Ag@Au core–shell upon exposure to Ag+, yielding a distinct colorimetric response. The sensing mechanism and surface chemistry were validated by dynamic light scattering (DLS), transmission electron microscopy (TEM), zeta potential analysis, Fourier-transform infrared spectroscopy (FT-IR), and UV–visible (UV–vis) spectrophotometry. High specificity toward Ag + with strong anti-interference in the presence of common coexisting ions was demonstrated, and a combined-interference test confirmed negligible cross-reactivity. Quantitatively, excellent linearity ( R 2 = 0.99) was achieved, with a UV–vis detection limit of 0.49 µg mL −1 and a naked-eye detection threshold of 6.0 µg mL −1 . The paper strips enabled Ag + capture for post-analysis recovery and safe disposal, reducing secondary pollution relative to solution-based assays. The platform is simple, low-cost, and field-deployable, and validation in tap-water samples with reliable recoveries underscores its potential for on-site Ag + monitoring. Graphical This work presents portable paper test strips embedding ascorbic acid (AA)-modified gold nanoparticles for colorimetric Ag + detection. AA reduces Ag + , yielding Ag@Au core-shells that shift the localized surface plasmon resonance (LSPR) and change color. The assay shows high selectivity with anti-interference, linearity ( R 2 = 0.99), UV-vis LOD 0.49 µg mL −1 , naked-eye threshold 6.0 µg mL −1 , and validated tap-water recoveries.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lian Cheng,Kai Liu,Huayun Gao,Zhongming Fan,Naohisa Takesue,Heming Deng,Haibo Zhang,Yongming Hu,Hua Tan,Zilin Yan,Yang Liu
Recent years witness a rapid surge in the research efforts on dielectric capacitors due to their high power density and fast charge/discharge speed. However, the relatively low energy density demands more efforts to meet the lightweight and compact requirement for practical applications. Here, we report sandwich-structured nanocomposite films with strawberry-like Ag@SrTiO 3 nanofillers. The introduction of Ag nanoparticles (NPs) on SrTiO 3 NPs could significantly improve dielectric properties, breakdown strength, energy storage density, and efficiency. As a result, a dramatically enhanced discharged energy density (24.6 J/cm 3 ) and efficiency (86.3%) are reached in sandwich-structured nanocomposite films containing 1.5 wt% Ag@SrTiO 3 nanofillers by the solution casting method. The enhancement of dielectric constant and breakdown strength of nanocomposite films is attributed to the Coulomb-blockade effect of Ag NPs, which inhibits the transformation of electrons. Our finite element simulation explicitly demonstrates that the Coulomb-blockade effect of Ag NPs can effectively improve energy storage performance, which therefore supports the experimental results.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Tao He,Shuang Xiong,Haobin Han,Dalei Wang,Yueyue Wang,Chaoqing Dai,Wei Liu
The composite structure composed of GO and Ag has better sensing ability and is widely used as SERS substrates. However, there are few studies on the influence of external environment such as light on the stability of GO and Ag composite structure. In fact, GO can effectively prevent Ag from oxidation , so it is necessary to deeply study the mechanism of GO protection. In view of this, we prepare Ag microspheres on glass slides by one-step reduction method, and spin-coated with GO as surface enhanced Raman scattering (SERS) strips for the detection of organic molecules R6G . The detection limit is as low as 10 −12 M. The linearity of the detection results is significantly corrected by using the GO characteristic peak as the internal standard (IS). The effects of xenon lamp simulate sunlight irradiation on the SERS performance of Ag substrate and Ag/GO Raman strips are investigated comparatively. We find that the Ag/GO composite structure can maintain good stability without the influence of light compared to the Ag substrate. We discuss the dynamic variation of Ag and Ag/GO substrates during the light exposure. Bacterial inhibition experiments further demonstrate the protective effect of GO on Ag. The conclusions of this paper have potential applications for improving the stability of SERS substrates.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2020
·
IF 4.389
Yue Yu,Yimin Sun,Xiong Zhou,Yurong Mao,Yunxiu Liu,Ling Ye,Li Kuang,Jing Yang,Yi Deng
Polyetheretherketone (PEEK) has been well concerned as a promising material for hard tissue repair because of its outstanding mechanical behavior and superior biocompatibility. However, its clinical application is limited by its biological inertness and the susceptibility to bacterial infection during implantation. To improve the original shortcomings, self-polymerized dopamine (PDA) was used to enrich silver ions on the PEEK surface. Moreover, a layer of carboxymethyl chitosan (CMC) film was formed on the PEEK surface by the spin-coating method, aiming to control the release of silver ions on the surface. At the same time, bone forming peptide (BFP) was modified onto the PEEK surface by 1-(3-dimethylaminopropyl)-3-ethylcarbonimide hydrochloride (EDC) / N-hydroxy succinimide (NHS). The characterization results showed that PEEK-Ag-CMC-BFP could be obtained successfully. The inhibition zone and bacterial kinetic curve showed a favorable inhibitory effect of the sliver-modified PEEK on gram-negative and gram-positive bacteria. In vitro experiments exhibited that PEEK-Ag-CMC-BFP had a better biological activity than that of PEEK, which could promote cell proliferation and osteogenic differentiation. It is expected that this dual-function material with antibacterial and bone-promoting properties has a vast potential applied in the field of hard tissue repair.
研究领域:
生物材料
·
组织工程
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 24
·14730-14736
·
IF 3.361
Jing Li,Fengmei Cheng,Haidong Li,Hongwen Zhang,Gang Wang,Daocheng Pan
Silver nanowire (AgNW) networks play an important role in the transparent conductive electrodes or antistatic coatings. In this work, we describe a facile two-step method to fabricate AgNWs/Zn2SnO4 composite films. Long AgNWs with a high aspect ratio were prepared through a modified polyol method, in which the organic octylamine hydrochloride rather than the commonly used inorganic chlorides was used as the shape-controlling agent. The AgNW networks were fabricated on the glass substrate, on which the Zn2SnO4 film was deposited, forming robust AgNWs/Zn2SnO4 composite films. The as-prepared composite films have strong adhesion, high thermal stability, low sheet resistance (5–15 ohm sq−1) and high light transmittance (85–80%), indicating a promising application prospect for transparent conductive electrodes and antistatic coatings.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Li Sun,Weiling Luan,Yuejin Shan,Shan-tung Tu
Monodisperse Au–Ag alloy nanoparticles were synthesized by a one-step rapid injection method in a capillary microreaction system with a short residence time (less than 3 min). Au–Ag alloy NPs possessed homogenous composition that revealed a linear relationship with surface plasmon resonance absorption peak. The optimal size distribution of Au–Ag alloy NPs with a standard deviation of 6% could be obtained from decreasing the molar ratio of Au 3+ :Ag + from 1:10 to 1:20 or enhancing the synthesis temperature from 140 to 160 °C. Transmission electron micrographs showed as-obtained Au–Ag alloy nanoparticles were sphere-like with the smallest average size of only 2.7 nm.
研究领域:
纳米医学
·
材料科学
·
生物材料
·
药物递送
·
分子影像
✓ 已验证
DOI
高影响因子
CARBON
·
2018
·
IF 7.082
Lixin Xia,Meng Xu,Guangzhen Cheng,Lini Yang,Yushu Guo,Dan Li,Dawei Fang,Qian Zhang,Hongyang Liu
A facile glucose assisted one-step method for preparing highly dispersed Ag nanoparticles (Ag-NPs) encapsulated into carbon nanotubes (CNTs) was developed. The CNTs with open tips are employed as the nano-reactor and support, silver nitrite (AgNO 3 ) is used as the precursor and glucose is employed both as the reducing and protecting agent in the whole preparation process. The Ag-NPs with diameters of 6–10 nm are uniformly assembled into the channel of CNTs. The detailed structure and morphology of Ag-NPs encapsulated into CNTs (Ag-NPs@CNTs) were systematically characterized. The obtained Ag-NPs@CNTs exhibits an enhanced antibacterial activity against Escherichia coli , comparing with those of Ag-NPs supported on activate carbon (Ag-NPs/AC) and on CNTs (Ag-NPs/CNTs) prepared by the traditional wetness impregnation method.
研究领域:
纳米材料
·
抗菌材料
·
纳米技术
·
材料化学
✓ 已验证
DOI
高影响因子
SCRIPTA MATERIALIA
·
2013
·Vol. 69
·期 8
·574-577
·
IF 2.821
Limeng Liu,Lianbing Zhong,Baoyou Zhang,Zhonghong Lai,Feng Ye,Zhiguo Zhang,Yu Zhou
The effects of the addition of 5 mol.% aluminum , copper, silver or gold on the densification , microstructures, mechanical properties and oxidation resistance in thin air of TaC ceramics were investigated. Full density and relatively high flexural strength (up to 738 MPa) were observed in the case of the Au addition after spark plasma sintering at 1700 °C for 5 min under 30 MPa pressure. Due to wetting of the TaC grains by a thin metallic film , the consolidated materials showed enhanced oxidation resistance against thin air.
研究领域:
材料科学
·
陶瓷
·
冶金学
·
高温材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）