ACS Catalysis
·
2021
·
IF 13.084
Yuanyuan Qian,Furui Tan,Jun Liu,Qicong Li,Kuankuan Ren,Yanbin Huang,Xiaobao Li,Dawei Cao,Kong Liu,Chao Zhao,Yongxin Li,Zhijie Wang,Shengchun Qu
Plasmon-induced photocatalytic reactions are important in the process of conversion of solar energy into fuels. To efficiently harvest energetic charge carriers from light-excited plasmonic materials, contact of the metallic nanostructures with semiconductors is necessary. Herein, we report that, even on single Au nanowires that are not in contact with any semiconductors, prominent photocatalytic water oxidation reactions could be still observed. The involved Au nanowires have dimensions of 300 nm in diameter, and the fabricated nanoelectrode presents an obvious photocurrent of 0.4 mA/cm2 at the potential of 1.2 V vs Ag/AgCl. The corresponding incident photon-to-electron conversion efficiency is realized as 0.24% at the wavelength of 520 nm. Detailed investigations reveal that the hot holes around the d-band of the plasmonic nanomaterials are responsible for such photocatalytic behaviors. Our results provide a special perspective to the plasmon-related reactions.
研究领域:
材料科学
·
能源转换
·
纳米技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jianchun Jiang,Qingmeng Pi,Jiahang Zhou,Yixuan Du,Yunbo Li
Ammonia is increasingly deemed a significant, green sustainable fuel which requires a large number of detection devices. In this study, ultrathin AuNWs/PEDOT:PSS Janus films had been prepared with ultrathin AuNWs film treated with H 2 S which could integrate with PEDOT:PSS film closely. The resulting transparent and flexible Janus film sensor showed the good response and selectivity performance to ammonia gas. Moreover, the sensitivity of Janus film devices to ammonia was greatly improved and the conductivity of the Janus films was kept well with increasing thermal annealing temperature. The limit detection for NH 3 was 500 ppb concentration and the improvement mechanism of the sensing performance was attributed to the increased surface area of conductive polymer . This method provides a universal platform to integrate different materials into Janus films and prepare next-generation flexible detection sensors.
研究领域:
材料科学
·
传感技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
Songliang Liu,Shuli Yin,Shiqian Jiao,Hugang Zhang,Ziqiang Wang,You Xu,Xiaonian Li,Liang Wang,Hongjing Wang
Electrochemical N 2 reduction reaction (NRR) under ambient conditions provides sustainable and green pathways; meanwhile, efficient electrocatalysts are strongly required. In this work, we report an interfacial active site strategy to improve the electrocatalytic NRR performance by modification of Au nanowire (Au NW) surface with oxygen-rich tannic acid (TA). Benefiting from their ultrafine one-dimensional nanowire architecture and the TA-modified metallic interface, the TA-Au NWs effectively facilitate the adsorption and activation of reactants. The TA-Au NWs exhibit a large NH 3 yield rate (15.71 μg h −1 mg −1 cat. ) and a high Faraday efficiency of 14.83% at −0.3 V (vs. the reversible hydrogen electrode) in a N 2 -saturated 0.1 M Na 2 SO 4 with an excellent electrochemical durability. This work provides a general surface modification strategy to fabricate highly active NRR electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Hongjing Wang,Dandan Yang,Songliang Liu,Shuli Yin,Hongjie Yu,You Xu,Xiaonian Li,Ziqiang Wang,Liang Wang
The electrocatalytic nitrogen to ammonia has attracted intensive attention but suffers from severe bottlenecks of low Faradaic efficiency and NH3 yield. Herein, we report a two-step process to prepare amorphous sulfur multilayer decorated gold nanowires (S/Au NWs) as superior catalysts for electrochemical NH3 production. The chemisorbed sulfur multilayers are favorable for selective hydrogenation of nitrogen to ammonia and provide sufficient exposed active sites for nitrogen reduction reaction (NRR). The S/Au NWs show a high NH3 yield of 21.04 μg h–1 mg–1cat. and Faradaic efficiency of 15.34%, as well as excellent durability. The superior NRR performance of Au catalysts with S chemisorption would stimulate interest toward NRR catalyst design of sulfur bonding to metal surfaces.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 37
·19300-19308
·
IF 11.301
Jingchun Wang,Xiaoyu Qiu,Keying Su,Siyuan Wang,Jiatian Li,Yawen Tang
It remains a grand challenge to control the island growth mode because a conformal growth is theoretically more favorable, in which the lattice mismatch between the overlayer and the substrate is negligible. Herein, we report the first example of “Frank–van der Merwe” mode and “Volmer–Weber” mode of Pd atoms on Boerdijk–Coxeter-type helical Au(111) nanowires. Quantitative analyses suggest that the pH-induced faster kinetic reduction rate (1.2 × 10−2 s−1) is a crucial factor to switch the Pd-growth mode from the conformal 4-atom-layers to ultrasmall islands. As a proof-of-concept application, the VW Au@Pd HNWs exhibit outstanding ORR activity (Eonset = 1.07 V, E1/2 = 0.91 V) and stability, outperforming FM Au@Pd NWs, Au(111) NWs, Pd black, and most reported electrocatalysts. Physical characterization systematically elucidated similar components, d-band center locations, and lattice distortions of both the representative structures, giving brand-new insights into the impact of their slightly different surface microstructures. In particular, the segmented oxyphilic–anaerobic interface of the VW Au@Pd HNWs directly balances the adsorbability of the intermediates; meanwhile, the interleaved lattice orientations favor multi-directional electron transmissions to promote ORR kinetics. This finding not only challenges the conventional wisdom of lattice-matched growth but also provides an identical model for the in-depth understanding of the structure–function relationship with a focus on the growth modes.
研究领域:
材料科学
·
电化学
·
催化作用
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2014
·Vol. 38
·期 8
·3395-3400
·
IF 3.159
Ai-Jun Wang,Jing-Jing Lv,Dan-Ling Zhou,Xuexiang Weng,Su-Fang Qin,Jiu-Ju Feng
In this report, ultrathin worm-like Au nanowires were constructed with the assistance of L-glutamic acid as a structure-directing agent and a weak stabilizing agent. The morphology of the Au products was found to be strongly dependent on the experimental parameters such as the amount of L-glutamic acid, as well as the reaction temperature. This synthesis was a seedless process, without using any template, surfactant, or toxic organic agent. Furthermore, the as-prepared Au nanowires were applied to facilely fabricate porous Au films with controllable thickness via simple gravity settling. The Au films showed high surface-enhanced Raman scattering (SERS) enhancement, using 4-mercaptobenzoic acid as a model probe. The Au films may be promising candidates for SERS sensing. This strategy provides an environmental friendly way for the preparation of various metal nanostructures with novel morphologies and useful applications.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ping Zhang,Qing Sui,Zhiqiang Liu,Chengyv Hu,Chunjing Li,Xiaodan Guo,Jinhui Wang,Guofa Cai
The stretchable electrochromic modulator is one of the most promising energy-saving optoelectronic devices that can be integrated into smart portable and wearable electronics. A lot of focus has been on developing transparent conductive electrodes of stretchable electrochromic modulators, but they generally suffer from poor chemical stability, low photoelectric balance, and unsatisfactory deformability. To address this challenge, we first develop Ag@Au nanowires (NWs) micromesh-based stretchable transparent conductive electrodes (STCEs) using a self-assembled approach, which displays superior photoelectric performance (8.5 Ω sq -1 with a transmittance of 81.5 %), good chemical stability in harsh electrolyte environment (acidic and alkaline) as well as robust mechanical stability (bending, folding, stretching and twisting). As a demonstration, the grown WO 3 on Ag@Au NWs-based STCEs can deliver good electrochromic stability even after bending over 1000 cycles and stretching to 50 %. Moreover, highly soft Zn//WO 3 and polyaniline (PANI)//WO 3 electrochromic modulators were assembled using flexible Ag@Au micromesh STCEs, which still retain uniform electrochromism in neutral and acidic electrolytes respectively. Definitionally, the strategy of in-situ grown Au shell on the surface of AgNWs micromesh provides an innovative solution to fabricate high-performance STCEs for the related portable smart wearable electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Yulu Ye,Jiahang Zhou,Minqiang Xia,Yunbo Li
Membrane catalysts have garnered considerable attention in recent years owing to their outstanding stability, high recyclability, environmental compatibility, and convenience. Herein, nanogold membrane catalysts have been successfully fabricated with ultrathin gold nanowires in the presence of thiourea by a vacuum filtration deposition method aimed at facilitating charge transport and enhancing the catalytic performance. By maintaining the thiourea treatment concentration at 500 μg/mL, the catalytic time of the nanogold membrane remained below 1.0 min for 2-nitrophenol, specifically at 15 s. The 500 μg/mL thiourea-treated nanogold membranes are also capable of rapidly catalyzing the reduction of 4-nitrophenol, methylene blue, and methyl orange, causing their respective UV characteristic peaks to disappear expeditiously within 20 s. Overall, this novel method offers a simple and convenient approach to obtaining nanogold membrane catalysts, holding great potential promise for applications in materials, catalysts, and environment fields.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Jove-Journal of Visualized Experiments
·
2018
·
IF 1.184
Xinglong Wang,Xuesong Wu,Jiating He,Xiaolin Tao,Hongyan Li,Gui Zhao,Yawen Wang,Hongyu Chen
Advancing synthetic capabilities is important for the development of nanoscience and nanotechnology. The synthesis of nanowires has always been a challenge, as it requires asymmetric growth of symmetric crystals. Here, we report a distinctive synthesis of substrate-bound Au nanowires. This template-free synthesis employs thiolated ligands and substrate adsorption to achieve the continuous asymmetric deposition of Au in solution at ambient conditions. The thiolated ligand prevented the Au deposition on the exposed surface of the seeds, so the Au deposition only occurs at the interface between the Au seeds and the substrate. The side of the newly deposited Au nanowires is immediately covered with the thiolated ligand, while the bottom facing the substrate remains ligand-free and active for the next round of Au deposition. We further demonstrate that this Au nanowire growth can be induced on various substrates, and different thiolated ligands can be used to regulate the surface chemistry of the nanowires. The diameter of the nanowires can also be controlled with mixed ligands, in which another "bad" ligand could turn on the lateral growth. With the understanding of the mechanism, Au nanowire-based nanostructures can be designed and synthesized.
研究领域:
纳米科学
·
材料化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Technology
·
2021
·Vol. 9
·期 7
·2100166
·
IF 3.631
Zhiqi Zhao,Qiujin Li,Yu Dong,Jixian Gong,Zheng Li,Xiran Qiao,Jianfei Zhang
Nowadays, flexible piezoresistive sensors have drawn considerable attention in e-skin, motion monitoring devices, etc. Wearability is an important nature of various flexible sensors. Herein, a sensitive flexible piezoresistive pressure sensor with gold nanowires (AuNWs) combined textile with high sensitivity and durability is presented. The knitted cotton fabric is used as the matrix for loading conductive material AuNWs to fabricate the wearable pressure sensors as clothing components. Cotton fabric can be easily transformed into conductive textile due to impregnation and combination with AuNWs. This AuNWs/textile material is demonstrated to be an appropriate flexible sensor to monitor various human motions, such as finger pressing, joints bending, and foot status. A smart glove is integrated with this AuNWs/textile as the sensing block for gesture expression and recognition, signal reading, and transmission. Besides the common gesture with finger movement combination, e.g., numbers, the simple AuNWs/textile-based smart glove can also serve for expressing some emoji symbol and be considered as a human–machine interface for some gesture emoji used in internet social platform. This AuNWs/textile is expected to be used as a practical wearable sensor with great potential for extensive applications, including human–machine interface, healthcare monitoring, and the Internet of Things construction.
研究领域:
材料科学
·
生物医学工程
·
电子皮肤
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2018
·
IF 11.384
Qi Xue,Juan Bai,Congcong Han,Pei Chen,Jia-Xing Jiang,Yu Chen
Optimizing the shape, structure, and interface of noble metal bimetallic nanostructures significantly improves their catalytic properties. Recently, Au@Pd core–shell bimetallic nanostructures have attracted considerable interest for fuel cell applications. Regrettably, most of the research mainly focuses on the morphological and structural control whereas interfacial control is neglected. In this work, polyethylenimine (PEI) functionalized Au nanowires@Pd core–shell bimetallic nanohybrids (Au-NWs@Pd@PEI) are synthesized by a chemical reduction method using Au nanowires (Au-NWs) as seeds in the presence of PEI and demonstrate their application toward oxygen reduction reaction (ORR) in an alkaline solution. Electrochemical results display that Au-NWs@Pd@PEI with optimal component shows enhanced ORR activity, selectivity, and durability compared to Pt/C electrocatalyst. Physical characterizations demonstrate that the electronic property of Pd shell mainly is affected by PEI polymer rather than Au-NWs core. Relative to PEI functionalized Pd nanowires without Au core, ORR activity enhancement of Au-NWs@Pd@PEI is exclusively ascribed to the surface strain effect. Meanwhile, loose-packed PEI polymer on the Pd surface can work as barrier nanosieves to exclusively prevent the access of methanol to Pd sites, which imparts Au-NWs@Pd@PEI with enhanced methanol tolerance toward ORR in an alkaline solution.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2017
·
IF 3.833
Yaru Jia,Lei Zhang,Liping Song,Liwei Dai,Xuefei Lu,Youju Huang,Jiawei Zhang,Zhiyong Guo,Tao Chen
Sensitivity and reproducibility are two major concerns to improve the performance and extend the range of practical applications of surface-enhanced Raman scattering (SERS). A theoretical report reveals that hot spots formed by gold nanoparticles with a tip-to-tip configuration would generate the maximum electric field enhancement because of the lightning rod effect. In our present study, we constructed a giant vesicle consisting of anchored tiny gold nanowires to provide a high density of sharp tip-to-tip nanogaps for SERS application. The tiny gold nanowires were directly grown and anchored onto the surfaces of polystyrene (PS) microspheres by a seed-mediated method. Then, the removal of PS microspheres by tetrahydrofuran led to the formation of the giant gold vesicles with hierarchical cage structures, providing the sharp tips and high density of hot spots for improving SERS performance. Compared with the nonwire structure (island and inhibited nanoparticle), giant gold vesicles with tiny wires showed a higher SERS enhancement factor (9.90 × 107) and quantitative SERS analysis in the range of 10–4 to 10–7 M. In addition, the large-scale giant gold vesicle array on the silica substrate resulted in a high reproducibility of SERS signals with the variation of intensities less than 7.6%.
研究领域:
纳米材料学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）