ChemCatChem
·
2019
·Vol. 11
·期 24
·6391-6397
·
IF 4.495
Huifan Li,Gaifang Pan,Mengna Ding,Wenkai Pei,Ziping Zhang,Yingchun Miao,Yuning Huo
Ag/Bi 2 WO 6 microspheres were successfully prepared by ultrasound-assisted photo-reduction route to realize the Ag-loading on Bi 2 WO 6 crystal, which was previously synthesized by using solvothermal process with [C 4 -mim]BF 4 ionic liquid. The synergistic process of photo-reduction and ultrasonic irradiation induced the efficient conversion of Ag + ion into metallic Ag nanoparticles with uniform distribution. The enhanced amount of Ag nanoparticles and the strong combination of Ag nanoparticles with Bi 2 WO 6 microspheres, efficiently promoted the light harvesting and inhibited the recombination of photo-induced charges. As a result, Ag/Bi 2 WO 6 microspheres via ultrasound-assisted photo-reduction route achieved the higher visible-light photocatalytic activity for H 2 evolution than those catalysts prepared by other methods. This work may provide an efficient way for designing photocatalysts for hydrogen generation using solar light. Graphical Photocatalysis : The synergistic process of photo-reduction and ultrasound irradiation was utilized to achieve the uniform Ag-loading on Bi 2 WO 6 microspheres. The enhanced amount of Ag nanoparticles and their strong combination with Bi 2 WO 6 crystals was beneficial for improving visible-light absorption, and inhibiting recombination of photo-generated charges. It resulted in the promoted activity for visible-light photocatalytic H 2 evolution.
研究领域:
材料科学
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光催化
·
纳米技术
·
氢能
·
环境科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xueer Ning,Aize Hao,Yali Cao,Na lv,Dianzeng Jia
The highly efficient piezocatalysts of Ag decorated ZnO nanocrystals (Ag-ZnO) have been designed and synthesized. Remarkably, piezocatalytic activity of Ag-ZnO depends on Ag concentrations. The piezocatalyst with suitable amount of 15% Ag-ZnO presents excellent piezocatalytic activity towards methylene orange (MO) organic dye degradation under ultrasonic vibration. The reaction rate constant of 15% Ag-ZnO is up to 19.58 × 10 −3 min −1 , which is 4.2 times in contrast with pure ZnO. Piezocatalytic efficiency of 15% Ag-ZnO reaches to ~ 90.5% after 120 min via combining piezoelectric effect with electrochemical synergistic coupling strategy. It also demonstrates that Ag decorated and piezo-electrochemical synergistic coupling effects can induce large amount polarization electric charges to form active superoxide radicals (·O 2 − ) and hydroxyl radical (·OH), further greatly facilitate the carriers transport and accelerate the electric charges carrier separation of the reaction kinetics process resulting in promoting the piezocatalytic degradation activity. Furthermore, a novel piezocatalytic mechanism has been put forward to elucidate the relationship between piezocatalytic decomposition performance and contribution in Ag decorated, and piezo-electrochemical synergistic coupling effects. The promising strategy provides an innovative guidance and idea for designing excellent performance piezocatalyst in dye wastewater decolorization treatment application.
研究领域:
材料科学
·
环境催化
·
纳米材料
·
能量转换
·
废水处理
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Yiyang Bi,Fuyu Jiang,PeiLin Liu,Yuchun Wan,Lianshan Sun,Wanqiang Liu
Aqueous zinc-ion batteries (AZIBs) are viewed as competitive candidates for high-energy-density storage. However, the performance of AZIBs is impeded by dendrite growth and side reactions on the zinc anode surface. Herein, a facile in situ galvanic replacement strategy assisted by ammonium persulfate (APS)-assisted surface etching is proposed to construct a zincophilic Ag-modified interface on Zn metal, enabling dynamic regulation of Zn 2+ nucleation and deposition behavior. As a result, the Zn@Ag anode exhibits a significantly reduced Zn 2+ nucleation energy barrier (from 47.2 to 31.2 kJ mol −1 ), enabling uniform and dense Zn deposition while effectively suppressing dendrite formation and interfacial side reactions. Meanwhile, COMSOL simulations based on the finite element method verified the key role of the Ag-modified interface in suppressing dendrite formation and mitigating interfacial corrosion. At current densities of 1 mAh cm −2 , a symmetric cell with the Zn@Ag interfacial layer as the anode achieved a cycle life of 1757 h (39 times that of bare Zn). Moreover, the Zn@Ag || V 2 O 5 full cell has a cycle stability of over 2800 cycles. This method provides a new strategy for the design of anodes in AZIBs.
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高影响因子
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
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纺织功能材料
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纳米复合材料
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表面改性
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抗菌材料
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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
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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
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yingdong Hao,Yingxiao Wang,Pengyu Chen,Lu Chen,Wei Wei,Nannan Sun
Photocatalytic oxidation of methane (CH 4 ) to value-added chemicals offers a sustainable and promising approach for chemical synthesis, however, efficient catalysts for the activation of inert C H bonds remain challenging. Herein, a novel Ag-AgCl biphasic composite was used as co-catalysts to modify ZnO semiconductor (Ag-AgCl/ZnO-z). Structure properties and catalytic performance in photocatalytic oxidation of CH 4 of the sample were systematically investigated, together with comparison with pure ZnO (ZnO-z) and a single Ag modified counterpart (Ag/ZnO-z). It was found that Ag-AgCl/ZnO-z was enriched with heterogeneous interfaces, which facilitated ultrafast carrier transport and their prolonged separation. Interestingly, AgCl acted as a hole acceptor, and the lattice Cl can be directly activated to •Cl, which is then responsible for forming a new •CH 3 formation pathway via a hydrogen atom transfer (HAT) mechanism. Moreover, a Cl-looping process can be established so that the catalyst remained stable during cyclic reactions. Under the optimum conditions, an excellent liquid oxygenates productivity of 12,731 μmol·g −1 ·h −1 was achieved. This work presents a prototype for designing biphasic composite co-catalysts, thereby offering valuable insights into introducing multiple CH 4 activation pathways.
研究领域:
光催化
·
材料科学
·
化学合成
·
能量转换
·
环境化学
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产品关联
DOI
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.
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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
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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
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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
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DOI
PubMed
高影响因子
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