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
RARE METALS
·
2025
·
IF 11
Liu Chao-Long,Xuan Keng,Guo Yao-Ping,Jiang Hao,Ma Wen-Jie,Wang Xue-Gang,Zhou Zhong-Kui,Li Jun,Guo Ya-Dan
Urchin-like W 18 O 49 , with a large specific surface area (113.738 m 2 ·g −1 ) and abundant oxygen vacancies (OVs), was prepared using an active sites tuning and microstructure engineering method. This material was applied for U(VI) adsorption for the first time, demonstrating a high adsorption capacity of 567.55 mg·g −1 , which exceeds that of most inorganic adsorbents. Characterization via active site masking experiments and theoretical calculations, etc., indicated that the excellent adsorption performance toward U(VI) was due to strong complexation between UO 2 2+ and W–O bond of W 18 O 49 , facile oxygen vacancy adsorption, and interface electron transfer from W 5+ to UO 2 2+ , which acted as a reducing agent, partially converting U(VI) to U(IV). Furthermore, W 18 O 49 exhibited practical applicability with a removal rate exceeding 82% after 5 cycles, a 92.79% removal rate for real uranium-containing wastewater, and a high uranium recovery rate of 75.96%. Additionally, the synergistic adsorption-photocatalytic effect significantly enhanced U(VI) extraction, reaching an extraction capacity of 988.0 mg·g −1 . This work provides a promising strategy for developing highly efficient U(VI) WO 3 -based adsorbents. Graphical abstract
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiahui Tao,Shouqin Tian,Bin Li,Tingfeng Ma,Longxiao Zhou,Xiujian Zhao
Thermochromic hydrogel-based smart windows (SWs) have received wide attention due to their high solar energy modulation efficiency by switching transparent and opaque state in the visible region. However, SWs are opaque to visible light rather than near-infrared (NIR) light at high temperatures, and the very limited NIR modulation greatly limits their energy-saving effect and practicality. Herein, we propose a reversible photo-thermochromic hybrid smart window (SW) consisting of photochromic W 18 O 49 and thermochromic polyacrylamide-poly (N-isopropylacrylamide) (PAM-PNIPAM) hydrogel to address above issues. It enables graded and dual-band sunlight regulation. In the initial state, the SW is transparent to visible and NIR light with luminous transmittance ( T lum ) of 79.49 %. As solar irradiation increases, it gradually blocks near-infrared light and maintains T lum due to the ultraviolet (UV)-triggered photochromic effect of W 18 O 49 . The increase in indoor temperature is delayed. When the solar irradiation reaches the maximum, the increase in ambient temperature and the photothermal effect of colored W 18 O 49 trigger the thermochromism of the hydrogel, thus the full-band sunlight is blocked and the sunlight transmittance is 0 %. The SW can reduce indoor temperature by 8.5 °C. This work sheds light on saving energy by fully utilizing solar energy through muti-mode switching in hybrid SW.
研究领域:
材料科学
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能源工程
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 8
·3354-3359
·
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
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化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiachen Qian,Bin Li,Shouqin Tian,Baoshun Liu,Xiujian Zhao
VO 2 -based thermochromic smart windows have attracted much attention due to their promising energy-saving effects. However, the high phase transition temperature ( T c , 68 °C), low luminous transmittance ( T lum , <40%) and solar energy modulation efficiency (Δ T sol , <10%) hindered their practical application. In order to improve these deficiencies simultaneously, the photothermal W 18 O 49 nanorods were introduced into VO 2 based nanothermochromic films in this work. The obtained film exhibited enhanced thermochromic performance ( T lum = 82.5%, Δ T sol = 10%) due to the incorporation of W 18 O 49 nanorods. And T lum of 63.3% and Δ T sol of 18.6% were presented for the bilayer film, which is one of the best reported performances for VO 2 films to date. In particular, the bilayer film exhibited an obvious energy saving effect with a reduction of 21.1 °C in indoor temperature compared with normal glass due to its excellent thermochromic properties. In addition, the thermochromic characteristics of VO 2 -W 18 O 49 -polyvinylpyrrolidone (PVP) composite films could be trigged at lower temperature than that of VO 2 film due to the additional thermal energy generated by the absorption of near-infrared light by W 18 O 49 nanorods. Therefore, the outstanding performance and the easily scaled solution-based synthesis route would facilitate the practical application of VO 2 -based smart windows.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 4
·1-13
·
IF 2.8
Li Yanmei,Hu Jin,Deng Zhongshan,Huang Huachao,Liu Zheng,Fu Jiaxin,Wang Kaijun,Wang Kaizhao,Feng Yongjin,Zhang Weijun
High-performance supercapacitors are essential for advancing energy storage devices, and superior active materials are crucial for this purpose. W 18 O 49 is recognized as a highly promising electrode material, such as in the form of nanowires and nanorods, for energy conversion and storage. However, it still faces challenges like low conductivity and insufficient active sites. The strategy of heteroatom doping has shown effectiveness, such as tin (Sn), which has potential for enhancing matrix performance, but it has not been explored for W 18 O 49 materials. Herein, a series of Sn-doped W 18 O 49 materials are carefully designed and synthesized using a straightforward one-pot solvent-thermal method in this study. Various analyses are conducted to confirm successful Sn doping and to observe structural changes with different Sn concentrations. The optimal material is identified as 3% Sn-W 18 O 49 , which displays a unique 3D sea urchin-like structure as observed via SEM and TEM. Furthermore, XRD peaks related to SnO impurities are noted at higher Sn doping levels, such as 5% and 7% Sn-W 18 O 49 . Electrochemical testing reveals a high specific capacitance of 546 F∙g −1 at 4 A∙g −1 for the 3% Sn-W 18 O 49 electrode, alongside excellent long-term cycling stability with an 86% capacitance retention after 6000 GCD cycles. The enhanced performance is attributed to the improved electrical conductivity, surface area, and active sites of the W 18 O 49 through optimal Sn doping. This research highlights the promising electrochemical properties of Sn-doped W 18 O 49 materials.
研究领域:
材料科学
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能源存储
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xuesong Zhao,Yingying You,Yiyang Ma,Chenchen Meng,Zhenghua Zhang
Toxic organic dyes are a serious threat to the global environment, and membranes with catalytic properties show great promise as a green water treatment method for removing these pollutants. Herein, Ti 3 C 2 /W 18 O 49 photocatalytic membranes were constructed by vacuum filtrating Ti 3 C 2 and W 18 O 49 to form a hybrid layer on a mixed cellulose ester (MCE) support. The efficient separation of dyes was attributed to the negative charge and abundant –OH groups of Ti 3 C 2 /W 18 O 49 , which can capture cationic dyes by electrostatic adsorption and form hydrogen bonds with the amino groups of dye molecules. Moreover, the Ti 3 C 2 /W 18 O 49 membrane exhibited excellent photocatalytic performance and a dye-contaminated membrane was regenerated under visible light in 120 min. The two component materials complement each other, with the W 18 O 49 providing adsorption sites and photocatalytic ability and the Ti 3 C 2 serving as an electron trap and improving charge separation. Photoinduced electrons in the conduction band of W 18 O 49 are transferred to Ti 3 C 2 to form O 2 – , while holes remain in the valence band of W 18 O 49 to generate OH, and h + . O 2 – and OH are mainly responsible for the degradation of dyes. Therefore, this efficient and easily prepared membrane shows practical potential as a next-generation method for dye removal from water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 27
·1-12
·
IF 2.8
Zhang Wei,Qin Lizhong,Qi Xiaohui,Na Liyan,Hua Ruinian
Photocatalytic hydrogen evolution on specific semiconductor material has been the most promising method to meet the future energy demands. To increase the efficiency of the photocatalysis, the β -NaY(Gd)F 4 :Yb 3+ ,Er 3+ @W 18 O 49 nanocomposites were successfully synthesized by a two-step hydrothermal method. It can be observed that the as-prepared nanocomposites have a layered structure; the inner layer is hexagonal-phase β -NaY(Gd)F 4 :Yb 3+ ,Er 3+ nanorods, and the outer layer is W 18 O 49 nanowires (NWs). Compared to the W 18 O 49 samples, the nanocomposites show 160% increase in hydrogen production efficiency in a BH 3 NH 3 aqueous solution under 980 nm irradiation. The enhanced photocatalytic activity of the nanocomposites can be attributed to their particular hierarchical structure. The effect of localized surface plasmon resonance (LSPR) on the surface of the W 18 O 49 NWs and the upconversion luminescence of nanorods in inner layer can be simultaneously triggered at 980 nm. Subsequently, the luminescence of the nanorods can be partially absorbed by the W 18 O 49 NWs to re-excite the LSPR oscillation of the nanocomposite. The reexcited LSPR effect improves the photocatalytic efficiency of the nanocomposite.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Xueteng Zhu,Hexia Deng,Gang Cheng
Photocatalytic reduction of CO 2 into fuels is a promising approach to address the energy crisis and global warming issues. In this work, g-C 3 N 4 -W 18 O 49 nanocomposite material was constructed by a simple solvothermal method. The W 18 O 49 nanorods have a good dispersion by coupling with the g-C 3 N 4 sheet. Under simulated sunlight irradiation, the g-C 3 N 4 -W 18 O 49 nanocomposite exhibited superior photocatalytic CO 2 reduction capability than that of g-C 3 N 4 and W 18 O 49 . The photo/electrochemical measurements demonstrated that the g-C 3 N 4 -W 18 O 49 heterojunction could accelerate the separation and migration of charge carries, thus improving the activity of photocatalytic reduction of CO 2 into CH 4 and CO.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Nano Research
·
2021
·
IF 2.929
Hai Yang Fu,Li Xuejiao Li,Sun Wei Sun,Liu Dongyue Liu,Gao Xiaofei Gao,Li Min Dong,Haiyang Fu
The W18O49 nanoparticles were synthesized by solvothermal method with tungsten chloride as raw material and n-propanol as solvent. Polyethylene glycol 400 (PEG-400) was modified for W18O49 nanoparticles (W18O49@PEG). The structure and morphology of W18O49 and W18O49@PEG were characterized by XRD and SEM. Methylene blue aqueous solution was used as wastewater adsorption model. And the comparative experiments with other absorbent materials, such as artificial zeolite and activated carbon were also conducted. The results revealed that after modifying by PEG-400, W18O49 has a better adsorption performance than other materials due to its large specific surface area and high surface energy. Finally adsorption circulation experiment was performed，the results indicate that the W18O49@PEG nanoparticles show great potential in the treatment of colored wastewater.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 33
·11604-11609
·
IF 4.39
Guojuan Hai,Jianfeng Huang,Liyun Cao,Koji Kajiyoshi,Long Wang,Liangliang Feng,Yijun Liu,Limin Pan
Designing cost-effective bifunctional catalysts with high-performance and durability is of great significance for renewable energy systems. Herein, typical Fe, Ni-codoped W18O49/NF was prepared via a simple solvothermal method. The incorporation of Fe ions enhanced the electronic interaction and enlarged the electrochemically active surface area. The increased W4+ leads to a high proportion of unsaturated WO bonds, thus enhancing the adsorption capacity of water. The valence configuration of nickel (Ni) sites in such dual-cation doping is well adjusted, realizing a high proportion of trivalent Ni ions (Ni3+). Due to the orbital interactions, the Fe3+/Ni3+ ions and OER reaction intermediates exhibit strong orbital overlap. The positions of the valence band and conduction band are well modulated. As a result, the Fe, Ni-codoped W18O49/NF shows improved electrocatalytic activity, and achieves a low decomposition voltage of 1.58 V at 10 mA cm−2 and retains long-time stability.
研究领域:
材料科学
·
可再生能源
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
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
危险品化学品经营许可证（带存储）