CRYSTENGCOMM
·
2015
·Vol. 17
·期 26
·4895-4902
·
IF 4.034
Changchao Jia,Hsueh-Shih Chen,Ping Yang
In this paper, TiO2 beads were deposited on Ag nanowires to create necklace-like Ag nanowire@TiO2 (Ag NW@TiO2) heterostructures for the first time. They were fabricated via a two-step synthetic method, including the preparation of uniform Ag NWs and the deposition of TiO2 on the Ag surface. Thioglycolic acid (TGA) molecules were used as binding agents to solve the tricky issue of substantial lattice mismatch between the Ag NW core and the TiO2 shell. The amount of water and the permittivity of the solvents are found to be important factors for the formation of the necklace-like heterostructures. Moreover, by varying the amount of titanium butoxide (TBT), the diameter of the TiO2 beads can be feasibly changed. The photocatalytic performance of necklace-like Ag NW@TiO2 was evaluated via degradation of methyl orange (MO) under ultraviolet (UV) light. The results reveal that the molar ratio of TiO2 to Ag contributes to the synergistic effect on the photocatalytic activity, and the best Ti/Ag ratio is found to be 2.8 for the highest photocatalytic performance of the Ag NW@TiO2 heterostructures.
研究领域:
材料科学
·
纳米技术
·
光催化
·
表面工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yuanting Wu,Jingyue Hu,Qiujun Liu,Xinmeng Zhang,Yunlong Xue,Bocheng Zhang,Xuhua Liu
Power density is one of the important factors affecting the performance of electrode materials, which is hampered by ion/electron transport and agglomeration build-up problems. In this study, a novel 3D NiMnO 3 /Ni(OH) 2 /Ag NWs composite is synthesized via the introduction of Ag NWs. The introduction of Ag NWs synergistically influences the crystal structure and micro-morphology of the NiMnO 3 /Ni(OH) 2 /Ag NWs composite. The unique pentatwinned structure of Ag NWs facilitates the enhancement of the (110) and (101) crystal planes, which induces the movement of Ni 2p 3/2 , leading to a significant increase of Ni 2+ concentration in the composites. This ensures an abundance of ion adsorption sites, generating materials conducive to reactive activity. This new structure increases the density of active sites and establishes a conductive network, which optimizes the electron and ion transport paths, greatly reduces the diffusion resistance at the electrode-electrolyte interface, and improves the charge transfer efficiency, thus effectively increasing the specific capacity and energy density of the material. The NiMnO 3 /Ni(OH) 2 /Ag NWs//AC device exhibits a remarkable specific capacity of 350.478 mAh·g −1 at a current density of 0.01 A cm −2 , and its Ragone plot reveals a peak energy density of 81.107 Wh kg −1 at a power density of 1699.871 W kg −1 . Additionally, it achieves an energy density of 60.532 Wh kg −1 at a power density of 8490.072 W kg −1 . This study explores the design and application of 3D structured electrode materials, which effectively improves the specific capacity of the materials and provides a new idea to further improve the energy density of supercapacitors.
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 SUPERCRITICAL FLUIDS
·
2014
·
IF 2.571
Qin-Qin Xu,Yu-Ling Ma,Gang-Xu,Jian-Zhong Yin,Ai-Qin Wang,Jin-Ji Gao
Well-defined Ag nanowires were obtained in SBA-15 at a short deposition time of 5 min in supercritical CO 2 when adding a small amount of ethylene glycol as the co-solvent. Ethylene glycol played a key role in dictating the nanowire morphology. Through detailed investigation of the whole deposition process, including the dissolution of precursor assisted by the co-solvent, the diffusion properties of the precursor into the nano-scale channels of the substrate, and the interaction between the precursor and the substrate, we found that a small amount of precursors were reduced into Ag 0 by ethylene glycol at the initial stage of the deposition. The resultant Ag 0 then acted as nuclei leading to a non-equilibrium sorption of the precursor. The rapid adsorption of the precursor onto the substrate resulted in a high loading of Ag in a short deposition time and the formation of nanowire morphology. Furthermore, this method was successfully extended to other porous substrates such as γ-Al 2 O 3 , SiO 2 and KIT-6, demonstrating its great potentials in the synthesis of nanocomposites.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Xiaojin Fu,Sijie Li,Jing Wen,Fuyan Kang,Congying Huang,Xiaogang Zheng
ZnFe 2 O 4 -coated Ag nanowires (Ag@ZnFe 2 O 4 NWs) were prepared for the photo-Fenton induced dehydration of fructose into 5-hydroxymethylfurfural (5-HMF) in visible light region. Effects of ZnFe 2 O 4 content, volume ratio of dimethyl sulfoxide (DMSO) to deionized water, reaction temperature, fructose dosage, H 2 O 2 content, pH values, inorganic ions, and quenchers on the fructose conversion, 5-HMF yield, and 5-HMF selectivity were performed in detail. Among these obtained composites, Brønsted acidic Ag@ZnFe 2 O 4 NWs with Ag NWs diameter of around 20 nm and ZnFe 2 O 4 coating of 6.13 wt% exhibit the best photo-Fenton catalytic activity for the conversion of fructose into 5-HMF, and slightly deactivate after five cycle times. The surface plasmon resonance effect of Ag NWs and the synergistic effect between ZnFe 2 O 4 and Ag NWs are favorable for the visible light absorption and the efficient transfer and separation of charge carriers. DMSO as well as OH radical plays the vital role in the photo-Fenton induced dehydration of fructose into 5-HMF.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Na Liu,Renzhe Li,Shijian Xiu,Jingyang Jin,Miao Piao,Yeru Bao,So Hee Kim,Zhengri Yin,Aihua Jin,Bo Quan
Non–enzymatic glucose sensors have gained significant attention as promising alternatives to address the limitations associated with enzyme–based sensors. Numerous non–enzymatic glucose sensors have demonstrated effective, non–invasive blood glucose monitoring through the analysis of human body fluids such as urine, saliva, and sweat. In this study, Cu 2 O/Ag nanowires (NWs) nanocomposites were in situ fabricated as electrode materials for non–enzymatic glucose sensors. To enhance the electrocatalytic performance, Cu 2 O/Ag NWs nanocomposites with a distinctive pepero–shaped morphology were synthesized using varied copper precursor ratios, facilitating a systematic investigation of Cu 2 O content on glucose detection. The results reveal that the CA–2 electrode material exhibits outstanding electrocatalytic performance for glucose detection, with sensitivity ranges of 10–100 nM and 1 μM–1 mM, achieving sensitivities of 22,099 and 1474 μA mM −1 cm −2 , respectively, and a detection limit of 3.29 nM. Additionally, this material has shown high efficiency in detecting glucose in urine, highlighting its excellent detection capabilities.
研究领域:
生物传感技术
·
纳米材料
·
电化学分析
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zhu Liu,Pengshu Yi,Longli Ma,Yuhang Yuan,Yuan Wang,Chuming Ye,Mingxin Ye,Jianfeng Shen
The practical application of aqueous zinc-ion batteries (AZBs) as attractive energy storage devices is severely hampered by the uncontrollable zinc dendrite growth on the metal anode. Here, a lightweight and flexible free-standing membrane of MXene/Ag nanowires (AgNWs) was synthesized via vacuum filtration to support the zinc anode. The 3D cross-linked network structure provides ample space for densely packed zinc electrodeposition. Zincophilic AgNWs that exhibit a low lattice plane mismatch with zinc lower the nucleation barrier for zinc, inducing uniform nucleation and lateral growth of zinc on the substrate. In addition, the 3D network framework effectively reduces the local current density and area capacity of the anode, creating a uniform electric field that is not conducive to zinc dendrite formation. Consequently, the highly reversible Zn@MXene/AgNWs composite anode exhibits long cycle stability of 1000 h at 2.0 mA cm −2 , 1.0 mAh cm −2 in the symmetrical battery. The full battery assembled with a sodium vanadate (NVO) cathode demonstrates excellent rate performance and long cycle life (2000 cycles at 5.0 A/g). The design of zincophilic hosts with high lattice plane matching provides a promising strategy for realizing dendrite-free zinc anodes for AZBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Chundong Liu,Maosen Yang,Jing Yu,Fengcai Lei,Yisheng Wei,Qianqian Peng,Chonghui Li,Zhen Li,Chao Zhang,Baoyuan Man
Surface-enhanced Raman spectroscopy (SERS) is widely used in chemical analysis, with very promising application prospects in daily life. However, there are still lots of problems in actual operation, for instance, pollutant detection from sewage, in which the analyte is often dispersed in nonhomogeneous solutions, leading to inaccurate Raman signal collection. Adjusting surface wettability to realize selective self-separation of multiphase liquids in situ on SERS substrate is an effective and challenging approach. In this work, a complex of CuO@Ag nanowires on Cu mesh modified by different wettability, converting from hydrophilic to hydrophobic by simple infrared illumination, is prepared as a multifunctional SERS substrate. Benefitting from the controllable wettability of the substrate, the multiphase solution can be self-separated and adsorbed at the two opposite terminals of it, and the 10 −9 M of malachite green and 10 −5 M of thiram used as two kinds of probe molecules can be separately detected at these two terminals. In addition, after fully hydrophobic modification, the substrate can be also used to extract the organic phase in the ‘water/oil’ mixture and perform in situ detection of the probe molecules in the ‘oil’.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2022
·Vol. 76
·期 5
·2703-2719
·
IF 2.146
Sun Ke Wei,Wang Fang,Ma Ting Mei,Zeng Han
Core–shell structure nano-composite made up of Ag nano-wire and metal organic framework material (MOF) was proposed to accommodate Hemoglobin (Hb) molecules. Influences of mutual interactions between Hb and components of core–shell nano-complex on direct electrochemistry and electro-catalytic efficiency on H 2 O 2 reduction of nano-composite with Hb attachment is the main objective of this exploration in this submission. The microscopy, spectrometry and electro-chemical techniques were used to achieve such goal in this paper. The experimental results revealed that the abutting ligation between Hb and Ag nano-wire would lead to the prominent alteration in configuration of heme site in Hemoglobin molecule. However such combination would not increase the active energy of substrate electro-reduction seriously. The quasi-reversible redox process with one proton and single electron participation for Hb-based electrode should be imputed to a typical thin-film confining pattern with normalized rate constant of heterogeneous electron shuttle at 6.6 × 10 –2 s −1 . Mass transferring step of electro-active species in nano-complex with Hb detention (normalized rate at 1.2 × 10 –4 s −1 ) should be regarded as the key factor in restraining the efficiency of enzyme-induced catalysis. Graphical abstract
研究领域:
材料科学
·
生物化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xingyue Wu,Yiping Qiu,Wenrong Cai,Junyao Li,Datong Wu,Laidi Xu,Yong Kong
Melamine foam (MF) supported NiCo 2 S 4 /Ag nanowires (AgNWs) were facilely prepared and used as the compressible electrode for the asymmetric supercapacitor (ASC). AgNWs and NiCo 2 S 4 were successively decorated on the surface of MF by a two-step impregnation approach, and the resultant NiCo 2 S 4 /AgNWs/MF exhibited a high deformation-tolerance and outstanding electrochemical behaviors due to the flexible skeleton of MF, high electrical conductivity of AgNWs and high specific capacitance of NiCo 2 S 4 . More importantly, the nanosized NiCo 2 S 4 could be effectively activated by charging/discharging as the NiCo 2 S 4 nanoparticles were gradually converted into NiOOH and CoOOH nanosheets during the repeated charging/discharging cycles, resulting in significantly high capacitance retention (155 % after 2000 charging/discharging cycles). Finally, an ASC was fabricated by using NiCo 2 S 4 /AgNWs/MF as the cathode and MF supported Ti 3 C 2 T x /AgNWs (Ti 3 C 2 T x /AgNWs/MF) as the anode, which showed a high energy density of 28.8 mWh cm −3 at the power density of 754 mW cm −3 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Ya Li,Xu Li,Md Mofasserul Alam,Dongbo Yu,Jibin Miao,Ming Cao,Peng Chen,Ru Xia,Bin Wu,Jiasheng Qian
With the increasing integration of electronic devices, there are growing demands for excellent thermal conductivity of thermal management materials on account of severe heat accumulation in practical applications. Graphene has been widely used in thermal conductivity nanocomposites because of its high in-plane thermal conductivity; however, inadequate through-plane thermal conductivity has become a major obstacle for extensive application. To deal with this issue, in this study, the Ag nanowire (AgNW) decorated reduced graphene oxide (rGO/AgNW) filler was prepared by in situ growth of AgNW between the interspacing of graphene nanosheets. As a result, the through-plane thermal conductivity of the nanocomposites reached 2.51 W/(m K), which was 260% more than pure graphene and 200% as high as those with Ag nanoparticle (AgNP) decorated rGO (rGO/AgNP). The enhancement that was attributed to AgNW created a “highway” of heat transfer pathways between the graphene layers and generated the synergistic effect of heat transfer with graphene. The nonequilibrium molecular dynamics simulation further revealed that the synergistic effect of boosting through-plane thermal conductivity was originated from the stronger excitation effect of low-frequency phonon (LFP) mode of AgNW. It would activate the LFP mode of the interface carbon atoms by resonance with AgNW and thus improve the phonon vibrational density of states of rGO/AgNW to realize more thermal transmit across the interface. It was expected that our rGO/AgNW hybrid structure as a thermal conductivity filler is of great promise for the high-efficiency through-plane heat transfer.
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Ziyu Chen,Guixia Liu,Xidong Zhang,Jingting Sui,Xiangting Dong,Wensheng Yu,Chao Song
Well-dispersed Ag nanowires and PVP-modified BaGdF 5 : Yb 3+ , Er 3+ spherical nanoparticles were prepared by simple solvothermal and hydrothermal method, and they were further combined to obtain photo-thermal-magnetic multifunctional Ag/BaGdF 5 : Yb 3+ , Er 3+ nanocomposites. Under NIR laser irradiation, monodispersed rare-earth fluoride BaGdF 5 : Yb 3+ , Er 3+ in nanocomposite exhibit good upconversion fluorescent. Meanwhile, under the action of an external magnetic field, the nanocomposite also exhibits good magnetic properties and excellent contrast efficiency by CT/MR imaging. The NCs possess good structure and photothermal stability at multiple cycles due to that Ag nanowires are modified by polyvinyl pyrrolidone and sodium citrate. The biocompatibility and low toxicity of NCs are also remarkable. Importantly, the unique linear morphology of Ag particles can achieve high efficiency conversion between light and heat. Furthermore, in vitro tests also confirm the high efficiency of photothermal therapy for cancer cells.
研究领域:
生物医学工程
·
纳米医学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 26
·6371-6379
·
IF 5.066
Shuyuan Cui,Zhigao Dai,Qingyong Tian,Jun Liu,Xiangheng Xiao,Changzhong Jiang,Wei Wu,Vellaisamy A. L. Roy
Three-dimensional (3D) ZnO/Ag nanowire arrays (NWA) SERS substrates are fabricated by a screen-printing technique. The preparation of patterned ZnO NWA involves a two-step growth process. The ZnO nanoparticles-based ink is prepared and printed as seed layers, which are used as templates to fabricate patterned ZnO NWA via a hydrothermal method. During the screen printing process, the patterns of ZnO NWA are controlled by printing plates. The as-obtained NWA with uniform morphology was fabricated at 90 °C and exhibits hydrophilic and lipophilic properties. Subsequently, the sensitive 3D SERS substrates are fabricated through deposition of Ag nanoparticles (NPs) onto the surface of patterned ZnO NWA by magnetron sputtering. The detection limit of Malachite green (MG) can achieve 10−12 M with an enhancement factor of about 2.5 × 1010. Combined with the sensitivity and uniformity, the ZnO/Ag NWA is applied for the quick detection of low concentrations of molecules related to food safety, such as amoxicillin.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）