CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Wenlong Tao,Congxue Su,Yan Wang,Huini Mo,Jun Fan,Yuan Sun,Shuping Tang,Huanfu Zhou,Xingliu Qin,Huidan Lu
The exploration of high-performance microwave dielectric ceramics exhibiting low-permittivity is of great significance for the advancement of next-generation wireless communication technologies. To meet the demands of the growing field of wireless communication, two novel low-permittivity KBaLnMo 3 O 12 (Ln = Eu, Yb; named KBEM and KBYM) ceramics with monoclinic structure were synthesized using a solid-state reaction route. Good microwave dielectric properties of ε r = 8.54, Q × f = 30, 611 GHz, and τ f = −45.2 ppm/°C were achieved for KBEM sintered at 790 °C, and KBYM sintered at 810 °C possessed excellent microwave dielectric properties of ε r = 8.87, Q × f = 52, 241 GHz, and τ f = −34.9 ppm/°C. According to the bond valence result, K + and Ba 2+ presented a strong compressed state but most Mo 6+ exhibited a slightly rattling state in both ceramics. The higher packing fraction and lattice energy might be the main reason for the higher Q × f in KBYM. The Mo–O bond in both ceramics played a vital role in influencing the Q × f according to the Phillips−Van Vechten−Levine (P−V−L) theory. Furthermore, KBaLnMo 3 O 12 (Ln = Eu, Yb) ceramics show good chemical compatibility with Ag powders and are suitable for low temperature co-fired ceramic (LTCC) applications.
研究领域:
材料科学
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无机化学
·
电子器件
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DOI
高影响因子
ORGANIC ELECTRONICS
·
2020
·
IF 3.31
Jiachen Kang,Kang Han,Xue Sun,Lianping Zhang,Rong Huang,Irfan Ismail,Zhenguo Wang,Changzeng Ding,Wusong Zha,Fangsen Li,Qun Luo,Yuanjie Li,Jian Lin,Chang-Qi Ma
Silver nanowires (Ag NWs) network is an excellent candidate as flexible transparent electrode applying in flexible perovskite solar cells, owing to their excellent electrical and optical properties . However, several problems including large surface roughness, chemical reaction between Ag and perovskite precursor, and migration of Ag limited the application in high performance perovskite solar cells . Aiming to solve these problems, the composite electrode combining the spray coated Ag nanowires and the low-temperature sol-gel zinc oxide was developed in this work. The optimized concentration and annealing temperature of sol-gel ZnO were 0.45 M and 150 °C. The introduction of zinc oxide with suitable concentration caused slight impact on the transmittance and sheet resistant of transparent composite electrode, and promoted mechanical and chemical stability in air relative to the pristine Ag NWs electrode. The use of the composite flexible electrode could decrease the surface roughness of the Ag NWs electrode, passivate the reaction of perovskite and silver electrode, and prevent the migration of Ag. As a consequence, the performance of the flexible device significantly improved from 9.51% to 13.12%. Under the AM 1.5G constant illumination, the optimization device has a remarkably improved stability than pristine device. This study demonstrates that spray Ag NWs as bottom electrode is suitable for flexible perovskite solar cells. Meanwhile, it's an effective method using sol-gel ZnO to construct composite electrode to promote the device performance and stability.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
·
IF 14.229
Boran Xu,Yandong Li,Yangqin Gao,Shuang Liu,Da Lv,Sujun Zhao,Hang Gao,Guoqing Yang,Ning Li,Lei Ge
A novel plasmonic photocatalysts of Ag-AgI/Bi 3 O 4 Cl was successfully synthesized via a simple and mild wet-chemical process. The 30 wt% Ag-AgI/Bi 3 O 4 Cl photocatalyst showed the highest photocatalytic activity for degradation of methyl orange (MO) under visible light (5 W LED lamp), which represents a 3.2 and 7.4 times enhancement in the photocatalytic degradation efficiency as compared to pure Bi 3 O 4 Cl and Ag-AgI, respectively. The surface plasmon resonance (SPR) effect of Ag nanoparticles (NPs) was detected by the UV–vis diffusion reflectance spectroscopy (DRS) and surface photovoltage (SPV) measurement, finding that the SPR effect of Ag extends the absorption and photo-response range in the Ag-AgI/Bi 3 O 4 Cl composite photocatalyst. Based on the analysis of electron spin resonance (ESR), linear sweeping voltammetry (LSV) characterization results, three electron transfer processes were proposed: AgI CB → Bi 3 O 4 Cl CB , AgI CB → Ag and methyl orange → Ag. Such electron transfer paths can not only effectively improve the separation efficiency of photo-generated carriers, but also ensure the stability of the catalyst. This study can provide a novel insight for modification of other desirable semiconductor materials to achieve high photocatalytic activity.
研究领域:
材料科学
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环境化学
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物理化学
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纳米催化
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半导体光催化
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DOI
高影响因子
Polymer Chemistry
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2014
·Vol. 6
·期 4
·625-632
·
IF 5.368
Daoyi Jiang,Gang Wang,Feng Zheng,Jin Han,Xuedong Wu
A novel “clawlike” dendritic monomer, 3, 2,3-bis((2,3-bis(ethylthio)propyl)-thio)propyl methacrylate was prepared and successfully incorporated into a thermosensitive poly(N-isopropylacrylamide) (PNIPAM) hydrogel system by free radical polymerization. The lower critical solution temperature (LCST) of these hydrogels can be altered in the range of 31.0 °C to 81.1 °C by varying the amount of dendritic monomers and oxidants. Fourier transform infrared spectroscopy (FTIR) demonstrated the successful preparation of hydrogels and the oxidation of the hydrogels. X-ray photoelectron spectroscopy (XPS) was used to confirm the molar ratio of thioether and sulfoxide groups. The hydrogels containing thioether or sulfoxide groups show excellent absorption towards Ag+ ions, and every dendritic monomer and its oxidized derivative can capture on average 1.31 and 1.62 Ag+ ions, respectively. These Ag+ ions in the hydrogel were in situ reduced by NaBH4. Thioether or sulfoxide groups in the hydrogel made the size of Ag nanoparticles (about 20 nm) much smaller than those nanoparticles in PNIPAM hydrogel. These hydrogels containing thioether groups as oxidant scavengers and broad spectrum antimicrobial Ag nanoparticles may have promising application in dealing with infected wounds.
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高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Jingyu Pang,Linan Zhou,Zhuang Liang,Tingting Li,Rui Yan,Fang Chai
The determination of heavy metal ions is critical to both human health, ecosystems, and the environment because it is a prerequisite for separating heavy metal pollutants. Herein, a ratiometric fluorescent strategy based on bimetallic AuAg nanoclusters and Si nanoparticles (AuAg-SiNPs) was constructed and achieved multivariate detection of Ag + , Cu 2+ , and Hg 2+ , simultaneously. The AuAg-SiNPs exhibited dual emission centered at 456 nm and 631 nm, with quantum yield of 23.48 %, and presented visual distinguishable signal for different ions. Notably, a smartphone visual platform was created to identify Ag + , Cu 2+ , and Hg 2+ with portable and accurate capturing and recognizing changing RGB values. The quantitative evaluation can be confirmed by various noticeable ratiometric evolution responses to three ions, the limits of detection were 1.61 nM, 49.94 nM, and 1.44 nM for Ag + , Cu 2+ , and Hg 2+ , respectively. Excellent environmental tolerance as well as reliability and practicability of AuAg-SiNPs enabled their test in real water samples. The synergistic effect of aggregation-caused quenching, static quenching effect, internal filtration effect, and fluorescence resonance energy transfer were revealed in process of detection. Ratiometric fluorescent probes offer great advantages in multiple identification of heavy metals in real sample. Smartphone-assisted detection greatly improves the effectiveness of visual on-site detection and has a promising application in real samples.
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高影响因子
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Yue Wang,Quanying Qu,Xiao Xiao,Tianyu Wang,Han Yan,Wei Wu,Qinzhi Wang
In this work, a high-performance lychee-like plasmonic nanocomplex with programmable hierarchical structure (Ag@ZIF-8@Au) was successfully fabricated as surface enhanced Raman scattering (SERS) platform via layer-by-layer assembly for sensitive detection of diazepam (DZP). ZIF-8 has good pre-enrichment for DZP as well as works as a skeleton for preventing aggregation of plasmonic nanoparticles, dramatically boosting sensitivity, stability and reproducibility of the SERS substrate. Furthermore, lychee-like Ag@ZIF-8@Au nanostructures provided numerous SERS “hot spots” for generating the synergistic enhancement effects including lightning rod and resonance coupling effects. By leveraging Ag@ZIF-8@Au substrate, DZP can be exquisitely detected. The detection limit plummets to 0.126 ng mL −1 , while a broad linear detection span of 10 −9 –10 −2 g mL −1 is achieved. Additionally, Ag@ZIF-8@Au can be utilized to identify DZP in aquatic products with a satisfactory recovery rate of 85.3 % to 111.9 %, which indicates its good practical applicability and great potential for monitoring safety of aquatic products.
研究领域:
材料科学
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食品安全检测
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2024
·
IF 4.2
Wuzhi Zhu,Jiaming Hu,Xiaohui Tan,Fangfang Wu,Xuyuan Chen,Xiuxun Han
Large open-circuit voltage deficit is still the main factor restricting the performance of kesterite Cu 2 ZnSn(S,Se) 4 thin film solar cells. The high concentration of Cu Zn defects and [2Cu Zn + Sn Zn ] defect clusters are believed to be the significant origins of severe band tailing of the kesterite absorber. A promising way to improve the open-circuit voltage and power conversion efficiency of the device is substituting Ag + with a larger ionic radius for Cu + to suppress the defects and construct a front-graded bandgap. However, the Ag doping in kesterite can significantly lower the melting temperature, which results in difficulties in forming an Ag grading distribution across the absorber due to the strong thermal diffusion . Herein, we innovatively introduce a ZnO insert layer in the precursor film, which is expected to slow down the Ag-Cu interdiffusion during the selenization, thereby forming a desired front-graded bandgap. The Ag grading distribution in absorbers is regulated by the thickness of ZnO insert layer. The effects of ZnO insert layer on the phase compositions, morphologies, optical properties , and photovoltaic performance of Ag-doped kesterite absorbers are investigated.
研究领域:
材料科学
·
光伏技术
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Yali Song,Shanshan Gao,Jiayu Tian,Hongzhong Zhang
To ensure efficient removal of SIX, Ag/g-C 3 N 4 with uniform-sized Ag nanoparticles was synthesized. With the employment of poly vinylpyrrolidone in synthesis process, Ag sizes were controlled and the photoabsorption ability of Ag/g-C 3 N 4 for visible-light was improved. In comparison with g-C 3 N 4, the degradation kinetic constant of SIX was increased by 1.75 times when Ag content was optimized (5 wt.% in this work, i.e. Ag/g-C 3 N 4 -5). The primary species for SIX degradation by Ag/g-C 3 N 4 -5 were holes and ·O 2 − in the presence of visible radiation. Besides, the intermediate products generated in reaction processes were identified and the transformed pathways were proposed in photocatalytic process of SIX by Ag/g-C 3 N 4 -5, including the rupture of the chemical bond between S and benzene ring, the rupture of S N bond, the hydroxylation and nitration of benzene ring. Finally, the photocatalytic degradation of SIX in two authentic water bodies revealed the efficient removal of SIX can still be realized by Ag/g-C 3 N 4 -5.
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Xiuting Li,Hongmei Liu,Ying Chen,Chenjie Gu,Guodong Wei,Jun Zhou,Tao Jiang
Pesticides and additives, extensively used in the raw agriculture samples and processed food, have attracted tremendous interests owing to their latent menace to the surroundings and human health. Herein, a rationally designed multifunctional polymethyl methacrylate-silver/graphite-like carbon nitride/silver (PMMA–Ag/g-C3N4/Ag) hybrid substrate with plasmonic-enhanced intrinsic Raman signals was exploited and served as a recyclable and quantitative surface-enhanced Raman scattering (SERS) sensor. Especially, the as-prepared flexible substrate with an electromagnetic enhancement factor of 1.64 × 106 could realize the sensitive monitoring and in-situ degradation of thiabendazole (TBZ) and carmine acid (CA) on apple or in applesauce with limits of detection as low as 2.29 × 10–6 and 6.76 × 10–5 mg/mL. Furthermore, heightened linear correlations with coefficients of 0.996 and 0.997 were accurately acquired using the film peak of PMMA as an internal standard. It was proved that the proposed sophisticated substrate may present attractive superior-in-practice multiplexed quantitative monitoring and facile decomposing of harmful molecules. The resulting recovery values distributed from 60.9 to 126% for the deeply processed foods that were decorated by 10–4 to 1 mg/mL CA together with TBZ.
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高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Na Han,Weijing Wang,Xingshuai Lv,Wenxin Zhang,Chao Yang,Menglu Wang,Xiaohui Kou,Wei Li,Ying Dai,Xingxiang Zhang
Due to the complexity of harmful wastewater components, environmental and multifunctional materials are required for sewage purification. In this paper, a novel kidney-bean-skin-like hydrophilic porous polyacrylonitrile/reduced graphene oxide-g-poly(amidoxime)-loaded Ag+ (H-PPAN/rGO-g-PAO@Ag+/Ag) composite nanofiber membrane was fabricated by combining electrospinning and hydrolysis methods. The spinning solution was pumped at a rate of 0.4 mL/h with the voltage set at a constant value of 23 kV. Then, some of the −CN groups switched to hydrophilic −COOH groups via a hydrolysis method, which acts as a linker of GO-g-PAN, Ag+, and the polyacrylonitrile (PAN) matrix. A further step of chelation and thermal treatment were used for generating Schottky junctions between rGO-g-PAO@Ag+ and Ag. After five-cycle tests, it exhibited outstanding mechanical properties ensuring the filtration and purification performance of the H-PPAN/rGO-g-PAO@Ag+/Ag composite nanofiber membrane (i.e., the tensile strength was still 7.21 MPa, and the elongation was 61.53%) for simulated wastewater. The methods of thermal treatment and high-pressure Hg lamp irradiation promoted the reduction of GO to rGO and Ag+ to Ag particles, which endows the final product H-PPAN/rGO-g-PAO@Ag+/Ag with excellent photocatalytic and bactericidal properties. Its catalytic efficiency for dyes benzoic acid (BA), Rhodamine B (RhB), methylene blue (MB), and methyl orange (MO) was up to 99.8, 98, 95, and 91%. The antibacterial rate was 100% against Escherichia coli and 99% against Staphylococcus aureus. More importantly, the photocatalytic and antibacterial PAN-based nanofiber membrane can be simply scaled up, which provides the membrane with great potential in highly efficient wastewater treatment and augmenting water supply.
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DOI
PubMed
高影响因子
OPTICS EXPRESS
·
2024
·Vol. 32
·期 19
·33330-33343
·
IF 3.2
Zhibing Zhang,Zhiyong Yin,Shuguang Li,Linchuan Hu
To achieve more accurate analysis and detection of changes in liquid parameters, we propose a dual-parameter surface plasmon resonance (SPR) sensor that can measure refractive index (RI) and pH simultaneously. In this paper, we compare and analyze the transmission spectrum when the SPR effect is excited by the cladding mode of a photonic crystal fiber (PCF) and the core mode of the no-core fiber. The results show that the SPR effect excited using the cladding mode is stronger and the sensor has better loss peaks, which is more conducive to realizing the detection of the external environment. Therefore, the sensor uses PCF as the substrate and utilizes a cascade composite film structure, and the area where a silver film is deposited on the surface of the PCF is selected as the RI sensing area. Another part of the PCF, after the silver film is deposited, uses a high-sensitivity polyacrylic acid/chitosan self-assembled nanofilm as the pH-sensitive film. Experimental results show that the maximum sensitivity is 4122.44 nm/RIU and -57.82 nm/pH when the RI range is between 1.333 and 1.385 and the pH range is between 3.11 and 8.63, respectively. In addition, we experimentally verified that the sensor had good stability and repeatability. The design of the sensor provides new possibilities for real-time monitoring and precise control, helping to advance scientific research and the development of industry.
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Qian Che,Qian Zhao,Mingjun Hu,Ruzhan Qin,Guangcun Shan,Jun Yang
Attributed to excellent mechanical compatibility with the human body and thus favorable comfortability and good integrability, stretchable conductors and functional conductive patterns have been one of the most important components in wearable electronic devices. However, due to poor compatibility between stretchability and conductivity in most material system, the simple, fast, and low-cost fabrication of a stretchable conductor, especially conductive patterns, has been a problem to address in this field. In this paper, we propose a flexible and robust laser ablation method in combination with a two-step film transfer process for the fabrication of stretchable silver nanowire (AgNW)-based conductive patterns. In this method, three critical steps were involved for the optimized properties. First, a simple one-pot solvothermal method was developed for scalable synthesis of high-quality AgNWs; second, a reliable film transfer method was proposed to ensure complete replication of the properties of the AgNW film; third, a digital laser ablation technique was employed for the selective removal of the AgNW layer. Finally, stretchable transparent conductive electrodes, circuits, and functional patterns were fabricated. As a proof-of-concept demonstration, a wearable sensor and multipixel capacitive sensor arrays were prepared and showed good and reliable performance under various deformations, indicating the proposed method is available for the fabrication of various stretchable conductive patterns.
研究领域:
材料科学
·
电子工程
·
纳米技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）