Nanomaterials
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2017
·Vol. 7
·期 9
·255
·
IF 3.553
Keke Yu,Xiaonan Sun,Liang Pan,Ting Liu,Anping Liu,Guo Chen,Yingzhou Huang
Hollow noble metal nanoparticles have excellent performance not only in surface catalysis but also in optics. In this work, the hollow Au–Ag alloy nanorices are fabricated by the galvanic replacement reaction. The dark-field spectrum points out that there is a big difference in the optical properties between the pure Ag nanorices and the hollow alloy nanorices that exhibit highly tunable localized surface plasmon resonances (LSPR) and that possess larger radiative damping, which is also indicated by the finite element method. Furthermore, the surface enhanced Raman scattering (SERS) and oxidation test indicate that hollow Au–Ag alloy nanorices show good anti-oxidation and have broad application prospects in surface-plasmon-related fields.Keywords:hollow nanorice;Au–Ag alloy;surface plasmon;surface enhanced Raman spectroscopy
研究领域:
纳米材料科学
·
光学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Hengchao Zhang,Rushun Xue,Mengke Li,Zhihao Wang,Lei Cao,Shanglin Yang,Xuefeng Xiao,Xiaojuan Li,Xiaozhou Feng,Xinhui Fan,Lingmin Yu
In situ grown 3D CuO nanoarray structures with an ordered architecture have emerged as promising materials for advanced CO gas sensing platforms owing to their intimate anchoring on a substrate, large surface area, and abundant exposed active sites. However, 3D CuO nanoarrays encounter high working temperature, slow response time, and inferior response value, impeding their practical use for CO gas detection. Herein, an Ag electronic sensitization strategy is proposed by a facile in situ deposition method. By innovatively constructing Ag nanoparticle coatings on the surface of CuO nanocone arrays, a high response (Rg/Ra) of 4.95 to 100 ppm of CO was achieved at a lower temperature of 180 °C, which is more than three times higher than that of pure CuO (240 °C, Rg/Ra = 1.53). At the same time, Ag/CuO has a fast response time (tres) of 49 s and a recovery time (trec) of 56 s, which is at least 19 s shorter than pure CuO. In addition, the sensor has good CO selectivity for other gases such as CO, NH3, C3H6O, and CH4O, as well as long-term stability for 8 weeks (relative error 4.03%), which is better than pure CuO (relative error 6.45%). This excellent performance is mainly attributed to the synergistic effect of the unique nanoarray structure of Ag/CuO and the strong sensitization effect of Ag. Therefore, this study provides a novel and promising strategy for developing high-performance chemical sensors using interfacial engineering.
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DOI
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Materials Futures
·
2025
·
IF 10.8
Xinyu Guo,Wenjin Yu,Xiangdong Li,Hantao Wang,Qinyun Liu,Yu Zou,Yunan Gao,Zhijian Chen,Lixin Xiao,Bo Qu
As environmentally friendly compounds, lead-free perovskites have gained widespread application in the fabrication of solar cells in recent years. Among these, rudorffites such as AgBiI4 are considered as promising candidates owing to their favorable band structure and exceptional stability. However, the formation of Ag vacancies during the synthetic process poses a significant challenge, severely hindering carrier transport properties. To address this issue, we propose an Ag management (AM) strategy utilizing aliphatic ammonium, which serves multiple purposes: it enhances the solubility of AgI in the precursor solution, mitigates phase separation caused by stoichiometric mismatches during AgBiI4 film formation, and effectively passivates Ag defects. The butylamine hydroiodide (BAI) modified AgBiI4 solar cells achieved a champion power conversion efficiency of 1.97%, representing a 26% enhancement over the control device.
研究领域:
材料科学
·
能源研究
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Kairui Kuang,Xue Jiang,Chenhui Qian,Zhenming He,Liumei Su,Jialong Zhao,Bingsuo Zou,Zhentao Du
In the present work, the exploration of photoelectrochemical (PEC) photodetectors (PDs) based on Ag-doped ZnO/MoS2 nanorod arrays is reported. Ag-ion doping optimizes the band structure of ZnO, reduces interface defect states, promotes the formation of an internal electric field, and significantly improves the photoelectric performance and stability of ZnO/MoS2 heterojunction PEC PDs. The PD exhibits excellent photodetection behavior, with a high photocurrent density (684.08 μA·cm–2), responsivity (2.207 mA W–1), and detectivity (11.3 × 108 Jones) under white-light illumination with an intensity of 310 mW cm–2 and a bias voltage of 0.6 V, which are approximately 2.7, 2.7, and 4.2 times higher than those of pure ZnO/MoS2, respectively. Furthermore, Ag doping significantly improves the self-powered photoelectric performance of the device, demonstrating excellent photoresponse characteristics under zero bias. This study reveals the mechanism by which Ag-ion doping improves the performance of ZnO/MoS2 photodetectors, providing fundamental support for the development of high-performance photoelectrochemical photodetectors.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Xuewei Hao,Jiaming Wu,Xintong Cai,Keyan Li,Chunshan Song,Xinwen Guo
The development of photocatalysts for efficient CO 2 conversion to chemicals especially C 2+ products remains a challenge. In this work, Ag nanoparticles (NPs) decorated GaN photocatalysts were synthesized by in-situ nitridation of Ga 2 O 3 combined with chemical deposition of Ag. The photocatalytic performance of Ag/GaN photocatalysts was optimized by tuning the loading amount and ripening time of Ag NPs, among which 0.3Ag/GaN exhibited best photocatalytic CO 2 reduction performance. The production rates of CO and CH 4 reached 421 and 80 μmol g −1 h −1 , respectively, and especially, it also produced C 2 H 6 with a production rate of 79 μmol g −1 h −1 . The introduction of Ag NPs not only significantly promotes visible light absorption as well as charge generation and separation, but also elevates surface temperature of the photocatalyst due to photothermal effect, resulting from localized surface plasmon resonance (LSPR) effect of Ag NPs. Moreover, the addition of Ag NPs enhances the adsorption of both CO 2 and the *CO intermediate, facilitating the CO 2 activation and subsequent C−C coupling process. This study provides new ideas for the design and preparation of photocatalysts capable of converting CO 2 into value-added chemicals.
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
Matter
·
2024
·
IF 17.3
Huizhen Ma,Ling Liu,Hua He,Si Sun,Shuyu Yang,You Huang,Yuan Li,Kexin Tan,Haile Liu,Shuhu Liu,Yonghui Li,Changlong Liu,Pengfei Liu,Hao Wang,Xiao-Dong Zhang
Ligand-protected metal clusters are essential in optics, catalysis, and biomedicine due to their unique electronic transfers and rapid renal clearance, but their stability and photostability are still highly challenged. Here, we develop atomically precise Ag 29 clusters with 900–1,200 nm emissions that exhibit ultrahigh structural stability for 2 months and distinct photostability for 140 min via Pt single-atom engineering. The density functional theory shows that Ag 29 behaves as a molecular-like semiconductor with a direct band gap of 1.3 eV. Meanwhile, the Pt single atom introduces rich 5 d states in the highest occupied molecular orbital, leading to a continuous electron supply that ensures high photostability. We acquire numerous images of blood vessels, which enables machine learning to predict high-resolution near-infrared II (NIR-II) images. The NIR-II light sheet microscopy achieves a large field of view and deep-tissue imaging without photobleaching and accurately surveils the pathological progression of intestinal injury at the depth of 2.4 μm.
研究领域:
生物医学工程
·
材料科学
·
光学成像
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DOI
高影响因子
RARE METAL MATERIALS AND ENGINEERING
·
2016
·Vol. 45
·期 7
·1664-1668
·
IF 0.236
Zhang Lingjie,Shen Tao,Shen Qianhong,Zhang Ji,Chen Lawson,Fan Xianping,Yang Hui
La 2 Sn 2 O 7 /SnO 2 composite powder was synthesized by chemical co-precipitation, and Ag-La 2 Sn 2 O 7 /SnO 2 electrical contact material was prepared by a powder metallurgy method. Anti-arc erosion properties, mass loss and Vickers hardness of the Ag-La 2 Sn 2 O 7 /SnO 2 composite were investigated, and its anti-arc erosion mechanism was discussed. Results show that the welding force of Ag-La 2 Sn 2 O 7 /SnO 2 composite is much better than that of Ag-SnO 2 , because the new phase La 2 Sn 2 O 7 can increase the viscosity of melt pool and improve wettability between silver and tin oxide to some extent. Meanwhile, Flatter arcing area and “beads-like” particles embedded scatteredly in the surface could decentralize arc energy via “pinning effect”, which decreases temperature rise and weakens the damage of surface structure, and better anti-welding property is obtained. Ag-La 2 Sn 2 O 7 /SnO 2 composite could be a leading candidate material for electrical contacts in the future.
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DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2023
·
IF 2.8
XueFeng Sun,Yueqin Song,Xiaolong Zhou
With the massive requisition of light olefins in dedicated areas of petrochemical industry, adsorption separation approaches are developed to meet the requirements. The literature studying long-chain olefins/alkanes is scarce, and the actual adsorption capacity of liquid-phase is rarely studied. In this paper, the adsorption process of Ag-10× zeolite for long-chain alkanes/olefins was systematically studied, the preparation conditions and operating conditions of the zeolite were investigated. The samples were characterized by XRD, BET and XPS. The results show that silver ions were uniformly dispersed on the surface of the zeolite. The actual adsorption capacity of the modified zeolite was determined in intermittent experiments by liquid phase concentration difference and pore volume correction. The experimental data were fitted and the results showed that the Langmuir isotherm equation was more appropriate for adsorption, indicating that the adsorbent surface was homogeneous. The quasi-secondary kinetic chemical equation was consistent with the adsorption of olefins by the modified 10× zeolite, indicating that the process was a chemisorption process. Experimental results shows that Ag-10× zeolite is an excellent adsorbent for separating long-chain olefins/alkanes mixed systems.
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Guo Li,Changxue Dong,Genshuai Sun,Mingzhe Li,Xin Cao,Li Zhou,Tao Chen,Fan Yang
Doping is a simple method to modulate the electronic configuration of semiconductor photocatalysts. This study regulated the energy band structure of CdSe nanosheets by Ag doping, which reduced the energy bandwidth of CdSe nanosheets by increasing the carrier density, thereby improving the efficiency of the photocatalytic reduction of uranium by CdSe nanosheets. A 96% removal of U(VI) was achieved by 3% Ag-CdSe nanosheets, which was 1.9 and 1.2 times higher than that of pristine CdSe nanosheets (50%), and 1% Ag-CdSe nanosheets (81%), respectively. Additionally, at pH = 4.0 and a solid–liquid ratio of 0.25, the reduction of uranium by 3% Ag-CdSe nanosheets (765 mg/g) was 2.2 times higher than that of pristine CdSe nanosheets (345.6 mg/g). This study provides a new idea for other efficient photocatalysts designed for uranium reduction.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Qian Liu,Guilai Wen,Donglin Zhao,Lisi Xie,Shengjun Sun,Longcheng Zhang,Yongsong Luo,Abdulmohsen Ali Alshehri,Mohamed S. Hamdy,Qingquan Kong,Xuping Sun
Electrochemical reduction of nitrite to ammonia can simultaneously achieve ammonia synthesis and N -contaminant removal under mild conditions, which has attracted widespread attention but still lacks efficient catalysts. In this work, Ag nanoarray using NiO nanosheets array on carbon cloth as support is reported as an efficient electrocatalyst to selectively reduce nitrite to ammonia. In 0.1 M NaOH with 0.1 M NO 2 – , such catalyst exhibits a maximum ammonia yield of 5,751 μg h −1 cm −2 (57,510 μg h −1 mg Ag -1 ) and high Faradaic efficiency up to 97.7 %. Density functional theory calculations applied to uncover the catalytic mechanism of NO 2 – reduction reaction on Ag.
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DOI
PubMed
高影响因子
CATALYSIS COMMUNICATIONS
·
2022
·
IF 3.51
Baohuai Zhao,Baofang Jin,Xiaodong Wu,Duan Weng,Rui Ran
A series of Sm-Mn oxides (SmMnO 3 , SmMn 2 O 5 and Sm 0.9 Ag 0.1 Mn 2 O 5 ) of perovskite-type and mullite crystal phases were synthesized for the catalytic oxidation of CO and C 3 H 8 . The Sm 0.9 Ag 0.1 Mn 2 O 5 composition showed the highest catalytic activity among the series of solids, especially for the CO oxidation to CO 2 with T 50 and T 90 values of 60 and 95 °C, respectively. The catalysts were characterized by powder XRD, Raman, BET, XPS, and H 2 -TPR. It was found that the catalytic performance of the solids was correlated well with their redox properties. Synergetic effects between Ag-related species and the mullite phase resulted in more active surface oxygen species and remarkably lowered the reduction temperature of the Sm 0.9 Ag 0.1 Mn 2 O 5 solid.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Ziyun Wang,Xuanli Zheng,Mengyao Gao,Jintian Zhao,Jinshen Lan,Xiaofang Ye,Jing Wan,Yuchen Fei,Shengshi Guo,Yuanfei Wu,Shengli Huang,Shuping Li,Junyong Kang
Plasmonic properties of the Ag nanocaps were analyzed by the finite-difference time-domain method, in addition to the fabrication and sensor application of the two-dimensional Ag nanocap arrays. The thickness limitation for the light penetration of the nanocaps was revealed. The evolution of the plasma modes with the shell thickness and structure of the nanocaps was illustrated. The hemisphere nanocap was found to own the strongest absorption intensity and field enhancement. The sensing ability of the fabricated Ag hemisphere nanocap arrays was evaluated by the Raman spectrum of the rhodamine 6G and methylene blue molecules. The ordered arrays displayed improved light absorption with intense plasmon coupling, resulting in the strong surface-enhanced Raman scattering with an enhanced factor 15 folds of the nanosphere arrays, which suggested that the metal nanocaps might be promising for biochemical sensor application.
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高影响因子
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