Advanced Materials Technologies
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2019
·Vol. 4
·期 7
·1900045
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IF 5.395
Haiyang Wang,Sen Lin,Di Zu,Jianan Song,Zhenglian Liu,Lei Li,Chao Jia,Xiaopeng Bai,Junchen Liu,Ziwei Li,Dong Wang,Ya Huang,Minghao Fang,Ming Lei,Bo Li,Hui Wu
Fog and frost formation cause many issues such as influencing building interior daylighting of architectural aesthetics or causing traffic accidents in cold weather. Transparent flexible heaters (TFHs) play a vital role in defogging smart windows. Herein, the rapid and facile fabrication of uniform, flexible, and large-scale TFHs based on percolation networks of Ag nanofiber (AgNF) is reported using blow-spinning method followed with room-temperature UV reduction. The TFHs exhibit excellent optical and electrical properties with a high transmittance of ≈95% and low sheet resistance of ≈16 Ω sq −1 . The TFHs based on AgNFs also present excellent mechanical flexibility and remain steady after 1000 cycles of bending. Furthermore, the saturation temperature of AgNF/cPI (colorless polyimide) electrode-based TFHs (9.5 Ω sq −1 ) reaches more than 285 °C at a DC voltage of 10 V, more effective than those of tin-doped indium oxide (ITO)-based TFHs (55 Ω sq −1 ) about 150 °C at the same transmittance of visible light (88%). The flexible AgNFs-based heater demonstrates excellent heating performance, as well as reliable chemical and mechanical durability in defogging smart windows of vehicles or buildings.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
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2017
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IF 0
Qing Liu,Zebin Yu,Mingjie Li,Yanping Hou,Lei Sun,Li Wang,Zhenbo Peng,Dongmei Chen,Yuxin Liu
A novel Ag/AgBr/Ga 2 O 3 composite with heterojunction microstructure was synthesized by using chemical deposition followed by UV reduction method. High resolution transmission electron microscopy showed that Ga 2 O 3 microparticles were tightly attached with Ag/AgBr to form a heterojunction. UV–vis diffuse reflectance spectra revealed that light response capability of Ga 2 O 3 was enhanced significantly when combined with Ag/AgBr. The degradation efficiency of methyl orange within 30 min under UV light irradiation with Ag/AgBr/Ga 2 O 3 , Ag/AgBr and Ga 2 O 3 were 89%, 74% and 48%, respectively. Ag/AgBr/Ga 2 O 3 not only showed excellent photocatalytic activity under UV light, but also exhibited efficient photocatalysis capacity under visible light. Furthermore, the mechanism of charge separation in the heterojunction under UV light irradiation was proposed.
研究领域:
材料科学
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化学
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环境科学
✓ 已验证
产品关联
DOI
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Zongrui Tong,Jueying Yang,Lizhi Lin,Ruiqi Wang,Bin Cheng,Yu Chen,Liansheng Tang,Jianying Chen,Xilan Ma
In the present work, a poly(γ-glutamic acid)/alginate/silver nanoparticle (PGA/Alg/AgNP) composite microsphere with excellent antibacterial and hemostatic properties was prepared by the in situ UV reduction and emulsion internal gelation method, and its potential application for antibacterial hemostatic dressing was explored. Well dispersed AgNPs were in situ synthesized by a UV reduction method with alginate as stabilizer and reductant. The AgNPs showed excellent antibacterial activities against both gram-negative and gram-positive bacteria. Additionally, the AgNPs prepared by the in-situ UV reduction exhibited better biocompatibility and antibacterial effects than those prepared by the conventional chemical reduction method. PGA/Alg/AgNP composite microspheres were then prepared with the AgNPs by an emulsion internal gelation method. Such microspheres were found to be a porous and hollow network with pH-sensitive swelling properties and excellent hemostatic performance, indicating its application potentials as an advanced antibacterial hemostatic material.
研究领域:
材料科学
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纳米技术
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Royal Society Open Science
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2019
·Vol. 6
·期 9
·
IF 2.515
Shang Wang,Zhaolian Han,Tingting Di,Rui Li,Siyuan Liu,Zhiqiang Cheng
The pod-shaped TiO2 nano burst tubes (TiO2 NBTs) were prepared by the combination of electrospinning and impregnation calcination with oxalic acid (H2C2O4), polystyrene (PS) and tetrabutyl titanate. The silver nanoparticles (AgNPs) were loaded onto the surface of TiO2 NBTs by ultraviolet light reduction method to prepare pod-shaped Ag@TiO2 NBTs. In this work, we analysed the effect of the amount of oxalic acid on the cracking degree of TiO2 NBTs; the effect of the concentration of AgNO3 solution on the particle size and loading of AgNPs on the surface of TiO2 NBTs. Scanning electron microscopy and transmission electron microscopy investigated the surface morphology of samples. X-ray diffraction and X-ray photoelectron spectroscopy characterized the structure and composition of samples. Rhodamine B (RhB) solution was used to evaluate the photocatalytic activity of pod-shaped TiO2 NBTs and Ag@TiO2 NBTs. The results showed that TiO2 NBTs degraded 91.0% of RhB under ultraviolet light, Ag@TiO2 NBTs degraded 95.5% under visible light for 75 and 60 min, respectively. The degradation process of both samples was consistent with the Langmuir–Hinshelwood first-order kinetic equation. Therefore, the catalytic performance of the sample is: Ag@TiO2 NBTs > TiO2 NBTs > TiO2 nanotubes.
研究领域:
材料科学
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纳米技术
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光催化
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环境工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）