PROGRESS IN ORGANIC COATINGS
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2022
·
IF 6.206
Jian Wei,Li Yuan,Guozheng Liang,Aijuan Gu
Endowing near-infrared light (NIR) induced self-healing coatings with high transparency is an interesting issue with big challenge. Herein, starting from designing an acrylate resin system and surface activated W 18 O 49 nanowires (mW 18 O 49 ), a new kind of NIR induced self-healing composite coating was developed, which is coded as ACWx (x is the loading of mW 18 O 49 in each coating). The effect of mW 18 O 49 loading on the integrated performance of ACWx coatings was studied. As the content of mW 18 O 49 increases, the transparency of ACWx coatings decreases, but the transmittance at 550 nm of all coatings is still >83.9 %. In addition, ACW0.5 and ACW0.65 composite coatings exhibit outstanding NIR induced self-healing ability after irradiation under NIR (power density of 2.5 W/cm 2 ) for 3 min. Meanwhile, the integrated properties including adhesion, flexibility, hardness, gloss, acid and alkali resistance of ACWx composite coatings meet the application requirements of automotive varnishes.
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
Nanoscale
·
2022
·Vol. 14
·期 13
·5002-5009
·
IF 8.307
Tiantian Dai,Zanhong Deng,Shimao Wang,Xiaodong Fang,Gang Meng
With features of innate tunnels and oxygen vacancies derived from a unique geometrical structure and sub-stoichiometric compositions, W18O49 nanowires have been explored as multifunctional materials with diverse applications. Though thermal oxidation offers a facile method to synthesize patterned W18O49 nanowires, the relatively high growth temperature (≳500 °C) hinders their emerging applications in flexible or wearable electronics. In this work, aiming to lower the growth temperature of W18O49 nanowires by thermal oxidation, the temperature and oxygen partial pressure dependent growth has been systematically investigated for both W films and powders. W18O49 nanowires could be steadily obtained with appropriate temperature and oxygen pressure ranges for both cases, while the growth temperature of a W film (metastable β phase dominant) could be much lower than that of W powder (α phase). The structural analysis indicates that metastable β-W is susceptible to oxidation in comparison with α-W and thus generates oxidation-induced chemical compression for nanowire growth. The growth temperature of W18O49 nanowires could be reduced to ca. 400 °C, which paves the way for the in situ patterning of W18O49 nanowires on indium-tin-oxide (ITO) glass substrates and flexible substrates.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 8
·3354-3359
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IF 5.968
Hongye Zhang,Changliang Huang,Ranting Tao,Yanfei Zhao,Sha Chen,Zhenyu Sun,Zhimin Liu
A simple solvothermal method was developed to prepare platinum/W18O49 ultrafine nanowires (<5 nm in diameter) through hydrolysis of WCl6 in ethanol-water solution in the presence of poly(N-vinyl-2-pyrrolidone) capping with Pt nanoparticles, and a series of Pt/W18O49 nanocomposites were obtained. These Pt/W18O49 composites were characterized by transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectra, X-ray photoelectron spectroscopy, and photoluminescence spectroscopy. It was demonstrated that PVP not only directed the formation of W18O49 nanowires, but also transferred the metal particles onto the oxide support without any size change. Due to the relatively strong interaction between Pt nanoparticles and the W18O49 nanowires, the as-prepared Pt/W18O49 composites exhibited blue shift in UV emission compared to the W18O49 nanowires, and displayed high activity and excellent stability for hydrogenation of p-chloronitrobenzene to p-chloroaniline with a selectivity of 99.7%.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 18
·15234-15239
·
IF 3.289
Weikun Zhang,Chong Lin,Shan Cong,Junyu Hou,Bin Liu,Fengxia Geng,Jian Jin,Minghong Wu,Zhigang Zhao
Li–S batteries are regarded as one of the most promising energy-storage devices due to their high theoretical energy density, five times higher than that of lithium-ion batteries (2600 vs. ∼500 W h kg−1). However, the polysulfide shuttle effect is the primary challenge for future applications of Li–S batteries. Herein, a novel barrier layer material, nonstoichiometric W18O49 nanowires, is reported to alleviate the undesirable shuttle effect, thereby largely boosting the specific capacity and cyclability of Li–S batteries. Without particular cathode design, the introduction of W18O49 nanowires enables the commercially available micro-sized sulfur cathode with 70% sulfur loading to deliver a respectable initial discharge capacity of 1142 mA h g−1 and retain a specific capacity of about 809 mA h g−1 after 50 cycles, even at a current density of 0.5 A g−1. To the best of our knowledge, such a capacity fading for Li–S batteries based on high loading of commercial micro-sized sulfur has been rarely reported.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
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2016
·
IF 3.958
Kainan Song,Feng Xiao,Lijuan Zhang,Fan Yue,Xiaoyu Liang,Jide Wang,Xintai Su
A hybrid nanomaterial comprising of one-dimensional W 18 O 49 nanowires grown on two-dimensional g-C 3 N 4 sheets was prepared by a facile solvothermal process. Photocatalytic activity of these materials for H 2 generation under visible light was evaluated. The optimum efficiency of W 18 O 49 /g-C 3 N 4 composite photocatalyst at a mass content of 30% was up to 4.5 times as high as that of the pure g-C 3 N 4 . The significantly enhanced performance of W 18 O 49 /g-C 3 N 4 composites was mainly attributed to the synergistic effect between the interface of W 18 O 49 nanowires and g-C 3 N 4 sheets, involving stronger light absorption in the visible range, faster transfer and more efficient separation of the photo-generated electron-hole pairs. In short, the W 18 O 49 /g-C 3 N 4 hybrid nanomaterial was demonstrated to be an effective photocatalyst for H 2 production.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Yi Xiao,Xueqin Tao,Ganhua Qiu,Zhifeng Dai,Peng Gao,Benxia Li
Constructing Z-scheme photocatalysts is an effective approach to enhance the conversion efficiency of solar to chemical energy. Herein, W 18 O 49 /g-C 3 N 4 heterostructures have been synthesized by growing W 18 O 49 ultrathin nanowires on g-C 3 N 4 nanosheets via a convenient solvothermal process. Various characterizations were performed on the materials to understand the structure-performance relationship. The photocatalytic properties of the W 18 O 49 /g-C 3 N 4 heterostructures were evaluated by the two oxidation reactions, phenol degradation and oxidative N C coupling of benzylamines , under a simulated sunlight (360 ≤ λ ≤ 780 nm). With tuning the W 18 O 49 /g-C 3 N 4 mass ratio, the optimal photocatalyst of W 18 O 49 (30)/g-C 3 N 4 containing 30 wt% W 18 O 49 nanowires exhibited the highest activity in both the photocatalytic reactions. The generations and contributions of the active species in the photocatalytic reactions were identified by electron spin resonance (ESR) spectra and active-species-eliminating experiments. Accordingly, the photocatalytic mechanism of W 18 O 49 /g-C 3 N 4 heterostructures has been expounded based on the direct Z-scheme electron transfer between the two semiconductors as well as the synergistic actions of active sites on W 18 O 49 nanowires and g-C 3 N 4 nanosheets . This work demonstrates a rational paradigm to construct 1D/2D semiconductor heterostructures and provides further insights into Z-scheme photocatalytic mechanism for boosting solar-driven pollutant degradation and organic transformation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2018
·
IF 0
Yizhi Wang,Shuo Wang,Fan Li,Yan Wang,Huairuo Zhang,Chunwen Sun
Highly active and durable electrocatalysts are vital for commercialization of direct methanol fuel cells. In this work, a three-dimensional nanocomposite consisting of platinum nanoparticles, W18O49 nanocables, and reduced graphene oxide composite (Pt/W18O49 NCs–rGO) has been prepared as an electrocatalyst for methanol oxidation reaction (MOR). The catalyst is prepared through a two-step method. The W18O49 nanocables and the reduced graphene oxide composite are prepared by a solvothermal process. Then, Pt nanoparticles are loaded on the W18O49 nanocables and the reduced graphene oxide composite by a hydrogen reduction at ambient condition. The obtained catalyst has a special three-dimensional architecture consisting of two-dimensional nanosheets, assembled one-dimensional nanocables, and the loaded nanoparticles on their surface. The Pt/W18O49 NCs–rGO catalyst shows 1.56 time mass activities than the Pt/C, with the current density of the forward anodic peak reaching 1624 mA/mgPt at 0.854 V versus reversible hydrogen electrode potential in 0.1 M HClO4 and 0.5 M CH3OH mixed electrolyte. It also shows a strong antipoisoning property toward CO. For the durability testing, the current density of Pt/W18O49 NCs–rGO shows a 37% decay, whereas the current of Pt/C catalyst shows a 41% degradation from 600 to 3600 s at 0.7 V. The high activity toward MOR, good antipoisoning for intermediate products, and excellent stability are ascribed to strong metal–support interaction effects between the Pt nanoparticles and the W18O49 NCs.
研究领域:
材料科学
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能源化学
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shumin Zhu,Qingdong Ruan,Xingwang Zhu,Dan Li,Bin Wang,Chao Huang,Liangliang Liu,Fangyu Xiong,Jianjian Yi,Yanhua Song,Jinyuan Liu,Huaming Li,Paul K. Chu,Hui Xu
Enhancing the activation of peroxymonosulfate (PMS) is essential for generating more reactive oxygen species in advanced oxidation process (AOPs). Nevertheless, improving PMS adsorption and expediting interfacial electron transfer to enhance reaction kinetics pose significant challenges. Herein, we construct confined W 18 O 49 nanowires with asymmetric active centers containing Co-Vo-W (Vo: oxygen vacancy). The design incorporates surface-rich Vo and single-atom Co, and the resulting material is employed for PMS activation in water purification. By coupling unsaturated coordinated electrons in Vo with low-valence Co single atoms to construct an the “electron fountainhead”, the adsorption and activation of PMS are enhanced. This results in the generation of more active free radicals (SO 4 •- , •OH, •O 2 - ) and non-free radicals ( 1 O 2 ) for the decomposition of micropollutants. Thereinto, the degradation rate of bisphenol A (BPA) by Co-W 18 O 49 is 32.6 times faster that of W 18 O 49 monomer, which is also much higher than those of other transition-metal-doped W 18 O 49 composites. This work is expected to help to elucidate the rational design and efficient PMS activation of catalysts with asymmetric active centers.
研究领域:
环境科学
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催化
·
水处理
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 63
·期 12
·4274-4284
·
IF 3.2
Guangming Tian,Jie Zhang,Mingcai Li,Xin Zhang,Dong Yang,Shuguang Zheng
The remotely controlled shape memory behaviors of a two-dimensional (2D) sheet to controlled helix structure upon external stimuli is of great significance in the field of smart materials. Herein, we devise a strategy to fabricate a series of shape memory polycaprolactone/W 18 O 49 nanowire film via highly efficient UV-triggered thiol-acrylate click chemistry. The resultant polymer composites exhibited desirable photothermal transfer efficiency and can enable rapid temperature increase over the melting temperature of polymeric matrix, thus remotely actuating shape transformation within 8 s. Owing to the well-defined architecture of the polymer network, the fabricated elastic composite film exhibited a high degree of crystallinity and showed excellent shape memory properties with R f of 93.12% and R r of 95.32%. Remarkably, under a 160 mW/cm 2 simulated sunlight illumination, the transformation of flat 2D film into 3D chiral actuators is driven by designing anisotropic bilayer thin sheet, and it yields right- and left-handed helix. This work will pave the way for designing biomimetic flexible actuators toward multifunctional shape-shifting devices. Highlights Shape memory polycaprolactone/W 18 O 49 nanowires composite film is fabricated via UV-triggered thiol-ene click chemistry. Polymer composites exhibit light-activated shape memory behaviors. The composite films show excellent shape fixity and shape recovery ratio based on the well-defined network. The shape morphing behaviors of a flexible 2D bilayer strip into 3D chiral actuators are achieved.
研究领域:
材料科学
·
纳米技术
·
智能材料
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）