JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Lin Huang,Maoqing Chen,Ying Yang,Qingshou Zheng,Li Gu,Ruobing Cheng,Xuebo Cao
Electro-reforming of organics such as alcohols into commodity chemicals and H 2 powered by renewables is intriguing and prevailing with the remarkable renaissance of electrochemical technology. Integrating Pt/Pd with an auxiliary metal, metal oxide, and metal hydroxide are feasible strategies to design the desirable catalysts toward alcohols electro-oxidation reactions. These catalysts however have high affinity toward carbonyl intermediates that occupy and poison the active sites. Thus, the target products suffer from poor selectivity. To address these issues, a facile binary Pt–Ag alloy nanowires (NWs) catalytic system was reported for efficient electro-oxidative reforming of ethylene glycol (EG), yielding glycolate with a selectivity of 91.5 %, an EG conversion of 96.4 %, and Faradaic efficiency (FE) of 87.4 %. Experimental and theoretical investigations revealed that Ag-induced electronic structure perturbations in Pt 0.66 Ag catalyst boosted the kinetics and robustness as a conventional promoter toward EG electro-oxidation reaction (EGOR). Moreover, the one-electron oxidation of water/hydroxide ion to generate abundant hydroxyl adspecies (OH ad ) on Ag served as another crucial promoter for efficient dehydrogenation, glycolate formation, and carbonyl intermediates release via a highly efficient, noncompetitive Langmuir–Hinshelwood (L–H) mechanism, but not the competitive L–H mechanism or the Eley–Rideal (E–R) mechanism. These findings provide new insights into the selective alcohol electro-oxidation reaction, and facilitate the generation of commodity chemicals via partial electro-oxidation reactions.
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高影响因子
OPTICS EXPRESS
·
2024
·Vol. 32
·期 6
·9276-9286
·
IF 3.2
Shuya Ning,Shuya Ning,Zhihui Liu,Shuo Wang,Naming Zhang,Bin Yang,Xin Wang,Fanghui Zhang
All-inorganic halide perovskite quantum dots (QDs) have recently received much attention due to their excellent optoelectronic properties. And their emission properties still need to be improved for further applications. Here, we demonstrated a remarkable emission enhancement of the CsPbBr3 QDs based on an Ag nanoparticle-Ag film plasmonic coupling structure. Through precise control of the gap distance between Ag nanoparticle and Ag film, the localized surface plasmon resonance (LSPR) peak was tuned to match the emission wavelength of the CsPbBr3 QDs. We achieved a 30-fold fluorescence intensity enhancement and a lower lasing threshold, which is 25% of that of the CsPbBr3 QDs without plasmonic coupling structure. It is attributed to that the plasmonic coupling structure exhibits an extremely strong local electric field owing to the coupling between LSPR of Ag nanoparticle and surface plasmon polariton of Ag film. This work provides an effective way to enhance the optical emission of perovskite QDs and promotes the further exploration of on-chip light source.
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CELLULOSE
·
2021
·Vol. 28
·期 3
·1715-1729
·
IF 5.044
Liu Hongyu,Yang Lin,Zhan Yifei,Lan Jianwu,Shang Jiaojiao,Zhou Mi,Lin Shaojian
In this work, a durable and sunlight-driven self-cleaning superhydrophobic cotton fabric was developed as a multifunctional oil/water separation material. First of all, Ag/AgCl was successfully deposited on the polydopamine modified cotton fabric surface by electrostatic adsorption, then the Ag/AgCl loaded fabric was coated by the polydimethylsiloxane (PDMS) via simple dip-coating method. The as-prepared cotton fabric (PDMS-Ag/AgCl@CF) presented the superhydrophobic property with water contact angle about 155°. Meanwhile, the prepared PDMS-Ag/AgCl@CF exhibited great tolerance and resistance to broad pH and various organic solvents, and it can also withstand 50 cycles of abrasion or 60 min of ultrasound treatment without an apparent decrease of superhydrophobicity, indicating its outstanding mechanical durability. As expected, this durable superhydrophobic fabric can availably separate various oil/water mixtures by gravity-driven force with high separation efficiency (over 97.8%), and it possessed good reusability. Additionally, the PDMS-Ag/AgCl@CF exhibited an outstanding self-cleaning performance under sunlight irradiation, due to visible light photocatalytic performance of Ag/AgCl. Finally, the resultant cotton fabric displayed good antibacterial activity. Therefore, in consideration of its prominent comprehensive performances, it is expected that the PDMS-Ag/AgCl@CF can be used as a promising material for oily water remediation.
研究领域:
材料科学
·
环境科学
·
光催化
·
抗菌材料
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CELLULOSE
·
2014
·Vol. 21
·期 6
·4557-4567
·
IF 3.033
Feng Jin,Shi Qingshan,Li Wenru,Shu Xiulin,Chen Aimei,Xie Xiaobao,Huang Xiaomo
In order to improve the antimicrobial activity of bacterial cellulose (BC), the silver nanoparticles (Ag NPs) were in situ fabricated on the BC membranes, affording BC and Ag hybrid antimicrobial materials, BC + Ag, which possesses excellent antimicrobial performance. Typically, carboxyl groups were firstly introduced into BC by TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation. Then, the carboxyl-functionalized BC was performed with ion-exchange reaction to change the sodium ions into Ag + by immersing in AgNO 3 aqueous solution, generating Ag + anchored BC. Finally, two types of distinct reductive reagents including NaBH 4 and sodium citrate were employed to transform Ag + into Ag NPs to fabricate BC + Ag. The diameters of Ag NPs were determined to be 3.8 nm for NaBH 4 -reduced BC + Ag, and 22.0 nm for sodium citrate-reduced one, respectively. The silver content of BC + Ag were determined to be 1.944 and 2.895 wt% for NaBH 4 -reduced sample and sodium citrate-reduced one, respectively. Two types of BC + Ag both showed a slow and persistent Ag + release profile, but the NaBH 4 -reduced one released much more Ag + than that of sodium citrate under the same measurement condition. In-depth antibacterial analysis via the disc diffusion and colony forming count method disclosed that BC + Ag exhibited strong bactericidal effects against both Escherichia coli and Staphylococcus aureus . And the antibacterial activity of NaBH 4 -reduced BC + Ag was higher than the sodium citrate-reduced one. Overall, this study would further improve the antibacterial efficiency of BC + Ag.
研究领域:
材料科学
·
微生物学
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Advanced Materials Technologies
·
2025
·
IF 6.2
Yingjie Niu,Ziqi Wang,Biqi Yang,Hui Cheng,Ao Li,Yuanyuan Tan,Linbo Bian,Chenglin Yi,Kaifu Zhang
Temperature sensors are widely used in daily life and industry. Developing low-cost, scalable, high-sensitivity conformal temperature sensors with a broad detection range is highly desirable. In this study, we prepared a hybrid functional ink composed of silver nanoparticles (Ag NPs) and silver nanowires (Ag NWs) via physically mixing for aerosol jet printing (AJP). The resulting Ag NPs/Ag NWs-0.5% ink exhibited a fine printing resolution of 10 µm and excellent conductivity up to 1.95 × 10 7 S/m. After 1000 bending cycles, the resistance increased by only 2.22%, which is 3.6 times better than that of pure Ag NPs ink. The sintering of the hybrid ink promoted densification of printed traces, enhancing the temperature coefficient of resistance (TCR) to 2.71 × 10 −3 /°C at 30 °C, enabling precise monitoring across a broad temperature range of 0–240 °C. Molecular dynamics (MD) simulations revealed Ag nanomaterial growth and densification mechanisms during sintering. High-quality conformal temperature sensors were also successfully fabricated on curved structures and applied for accurate temperature monitoring during the battery discharging process of new energy vehicles. These findings underscore the significant potential of emerging AJP technology in the fabrication of high-performance conformal sensing electronic devices.
研究领域:
材料科学
·
纳米技术
·
柔性电子学
·
传感器与传感技术
·
增材制造
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Hongxia Liu,Meng Wang,Xuqiang Zhang,Jiantai Ma,Gongxuan Lu
The development of an active but cheaper catalyst is critical for efficient photocatalytic hydrogen from renewable source. In this study, we develop a high active catalyst for hydrogen evolution from formaldehyde via alloying of Pd with Ag and sensitization with a dye eosin Y (EY). The XRD, XPS, TEM and HRTEM characterizations indicate that the catalyst exhibits a core-shell structure (Ag core and Ag-Pd shell). Alloying Pd with Ag not only provides more efficient catalytic sites than single component Pd catalyst, but greatly promotes the efficient electron transfer and prolongs the lifetime of photogenerated electrons, enhances the charge separation efficiency and the photocatalytic hydrogen evolution activity significantly. The catalyst activity for hydrogen is highly dependent on the adsorption energies of HCHO and H 2 O molecules on metal surface of the alloy catalyst. Our results disclose a new route to high efficient catalyst development for solar hydrogen generation from formaldehyde.
研究领域:
材料科学
·
能源化学
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2026
·
IF 7.6
Runze Wei,Junhong Jia,Rui Deng,Mengrong Tian,Xuan Ren,Zongyu Zhang,Yun Shi,Nairu He,Jie Yang
To investigate the influence of different powder addition strategies on the properties of Ag-containing lubricating coatings, NiCrAlY-Mo-Ag-Cu coatings incorporating different (Ag, Cu) powders (direct doping, core-shell structure, and powder alloyed) were fabricated via atmospheric plasma spraying. Combining characterization techniques and density functional theory calculations, the friction behavior, tribological properties, and underlying mechanisms of the three coatings were explored through constant-temperature friction tests and thermal cycling friction tests over a wide temperature range. The results indicate that the core-shell structure process helps reduce coating porosity (from 2.61% to 1.68%), but the average hardness of the coating decreased by 12.5% (230.6 HV → 201.8 HV). The alloying strategy circumvented hardness degradation, striking a balance between coating densification and mechanical robustness. At 800 ℃, a composite tribofilm comprising simple metal oxides (e.g., NiO, Cr 2 O 3 , and Al 2 O 3 ) and high-temperature lubricating phases (NiMoO 4 , Ag 2 MoO 4 , CuMoO 4 ) developed on the surface, effectively suppressing silver agglomeration and depletion. Owing to the synergy of these effects, the AgCu-alloyed coating achieved a low coefficient of friction (COF) of 0.25 at 400 ℃ and demonstrated a ∼30.9% reduction in wear rate during the 800 ℃ thermal cycling test compared to the direct-doping coating.
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高影响因子
VACUUM
·
2026
·
IF 4.3
Wangqiong Xu,Baiyan Guo,Xianrong Li,Kun Xu,Zhe Li,Shimei Guo
Spinel LiMn 2 O 4 with excellent cycling performance and low cost has been regarded as the most promising cathode material for lithium-ion batteries. However, the manganese dissolution and electrolyte decomposition significantly compromise structural stability, thereby hindering large-scale practical implementation. Here, we propose a surface modification strategy to enhance the structural stability of the LiMn 2 O 4 cathode using Ag nanoparticles as coating materials, where the size of the Ag nanoparticles is controlled by adjusting the decomposition temperatures of AgNO 3 to 600, 700, 750, and 800 °C. Combining the detailed structural characterization and performance characterization, we find that surface coating with the largest-sized Ag nanoparticles with 10.02 nm contributes to stabilizing the interface between the cathode materials and electrolyte, reducing the decomposition of electrolyte, and improving ion diffusion kinetics. Consequently, the corresponding Ag/LiMn 2 O 4 heterostructure exhibits outstanding cycle performance, with an initial discharge capacity of 101.6 mAh g -1 and capacity retention of 84.45% after 1000 cycles at 5 C under 25 °C. Our work demonstrates an effective method to improve the structural stability of LiMn 2 O 4 .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Jie Yang,Ling Zhou,Xin-Yue Wang,Gao Song,Li-Jun You,Ju-Mei Li
Herein, the robust core-satellite Ag/TiO 2 /Ag composite nanospheres were successfully developed. We firstly fabricated large silver nanoparticles with sufficient plasmonic activity as cores and then encapsulated uniform titanium dioxide interlayer shell around Ag cores, which serves as the highly functionalized substrates to achieve uniform and plentiful surface chemical properties. Next, the outer shell of small silver satellites was formed in-situ via controllable reduction of AgNO 3 by n -butylamine, which acts as the remarkable enhancer for surface enhanced Raman scattering (SERS). The Ag/TiO 2 /Ag composite nanospheres with exceptional SERS sensitivity were easily prepared via facilely tuning the coverage and grain sizes of silver satellites. Then the optimized Ag/TiO 2 /Ag composite nanospheres were employed to quantitatively detect methylene blue (MB) in solution. The results showed good linear relationship between SERS intensities and logarithm concentrations of MB and the limit of detection is low to 10 −10 M. Moreover, the highly uniform and robust Ag/TiO 2 /Ag composite nanospheres display outstanding reproducibility (RSD = 4.02%) and highly storage stability. Owing to the intrinsic catalytic activity of small Ag satellites, Ag/TiO 2 /Ag nanospheres were further applied to effectively follow the degradation reaction process of crystal violet by SERS. Altogether, the core-satellite Ag/TiO 2 /Ag nanospheres present multiple SERS application potential in various fields, such as quantitative chemical analysis, trace detection of pollutants and in-situ reaction monitoring.
研究领域:
材料科学
·
分析化学
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高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Keqing Zhang,Hangda Chen,Baoquan Xiao,Jie Chen,Wei Yan,Yanpeng Liu,Changfa Hu,Long Chen,Juanjuan Huang,Shanglong Peng
Layered manganese oxide has rich active sites, amounts of variable valence states, and economic feasibility, so it has attracted wide attention. In aqueous zinc ion batteries, its poor conductivity and easy solubility in water limit its performance as an electrode. Therefore, we used a simple one-step hydrothermal method to prepare Ag+ intercalated MnO2 for aqueous zinc-ion batteries’ cathode. An in-depth exploration of the electrochemical phenomenon of Ag–MnO2 found that interlayer Ag+ regulates the electronic structure of MnO2 and reduces the Jahn–Teller effect, and the desolvation of Ag–MnO2 is easier, which promotes the embedding of Zn2+. In addition, the migration of Ag+ and the in situ formation of Ag metal particles also enhance the conductivity of the electrode. As a result of the Ag+-Ag0 synergistic effect, Ag–MnO2 has obtained high rate performance (275.6 mA·h·g–1 at 200 mA·g–1) and excellent cycle stability (98.8% capacity retention over 600 cycles at 1000 mA·g–1). This provides insights for the pre-inserted Ag+ to improve the electrochemical performance of MnO2.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jian Zhang,Ning Pu,Menglin Li,Wenhao Sang,Qing He,Qianqiu Tian,Wen Zhang
Interest in functional silver has rapidly grown over the years due to significant advances in separation, sensing, catalysis, and biomedical applications. Here we developed a new strategy to load single atomic silver species in the rigid and open unit of the fully conjugated benzimidazole-linked polymers (BILPs). Due to the well-defined chelating units of N-heterocycles, the Ag + ion species can be coordinated by N ligands and stabilized in the atomic level without aggregating into nanoscale Ag clusters and nanoparticles. The obtained Ag + -BILP-101 exhibits a selective binding property of Ag + ions from solutions. The ultrastable structure and the property of taking up metal species, endow BILPs with the advantages of functionalizing metal species. After the reduction by NaBH 4 , the Ag + ions were transferred into Ag nanoparticles. The substantial and intrinsic porosity of BILPs also gives excellent accessibility to Ag species loaded in the frameworks. The plentiful N-heterocycles and loaded Ag species show a synergistic/coadsorption effect for iodine vapor, and the charge transfer from frameworks promotes the formation of iodide ions. The iodine capture capacities of Ag + -BILP-101 and Ag 0 -BILP-101 reach 3.3 g/g and 3.7 g/g at 80 ℃, and still maintain 3.2 g/g and 3.5 g/g at 150 ℃, respectively. After ethanol elution, the residual iodine/Ag molar ratios in Ag + /Ag 0 -BILP-101 samples are still more than one (about 1.5), suggesting their strong affinity toward iodine. This work highlights the excellent selective Ag + ion binding and Ag species supporting properties of BILPs, which can extend to other porous organic framework platforms for various applications based on silver species-skeleton interactions.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Miao An,Hui Li,Ming Su,Shu Gao,Ming Chen Wang,Shi Gang Shen,Zhong Feng Gao,Jiang Xue Dong
In this work, the water-soluble fluorescent Ag nanoclusters (DPA @ Ag NCs) were first prepared based on D-Penicillamine (DPA) as a stabilizer, however, the fluorescence quantum yield (QY) of DPA @ Ag NCs was very low, then Cu 2+ was employed to improve the fluorescence QY and the doped Ag nanoclusters with Cu 2+ (DPA @ Ag/Cu NCs) were obtained. The study showed that the QY increased fourfold and the emission of nanoclusters changed from red to yellow after addition of Cu 2+ . The reason for change of fluorescent properties was attributed to the change of self-assembly structures caused by adding Cu 2+ into reaction system, leading to the aggregation-induced emission enhancement (AIEE) effect and enhancing the band gap (Eg) between the HOMO and LUMO in nanoclusters. Subsequently, a fluorescent Ag + sensor with high sensitivity and selectivity was established based on the DPA @ Ag/Cu NCs as probes in aqueous solution. Experiments showed that the Ag + could significantly quench the fluorescence of DPA @ Ag/Cu NCs under experimental conditions, and there was a good linear relationship between the fluorescent intensity quenching value and Ag + concentration in the range of 0.05–800 μM, and the limit of detection (LOD) was 0.03 μM (3σ/k). Meanwhile, most of common ions had no effect on the experimental results under the same conditions. In addition, the sensor was successfully applied on the detection of Ag + in real water samples, and the recovery rate was 80.3–99.0%.
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高影响因子
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