CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zihui Liang,Zezhu Zhou,Jing Li,Shiliang Zhang,Binghai Dong,Li Zhao,Congcong Wu,Huiyu Yang,Fengxiang Chen,Shimin Wang
As a luxurious textile for more than five thousand years, silk fibers/products have always been favored by consumers and the markets, but the poor photostability seriously hinders its utilization in fashionable apparel. Even if enduing the functionality of silk fiber through surface modification, it is often at the expense of its comfort. Here, an ultra-thin amorphous titanium dioxide nano-film with a thickness of only five in a thousand of fiber diameter and the add-on percentage ≤ 5.33% was prepared on the surface of silk fibers/fabrics by atomic layer deposition (ALD) methods. The tensile strength of the modified silk fiber maintains 89.17% of the original fiber after exposure to UV light for 672 h. They can also withstand multi-cycle laundering and accelerate light-aging, which exhibiting an excellent UV resistance. Most importantly, the functional coating has a negligible impact on the comfortable and wearability performance of silk fibers/fabrics. In addition, ALD-coated silk fabric is also further used as an outdoor reflective cooling material and achieving a superior thermal insulation effect with the temperature reduction up to 10.1 °C.
研究领域:
材料科学
·
纺织工程
·
纳米技术
·
表面科学
·
功能纺织品
·
光稳定性
·
生物医学材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wei Zhou,Wanglong Mao,Pingyang Huang,Xiong Huang,Haoyuan Xu,Bo Wu,Xiaofang Jiang,Xiangtao Chen,Hanyu Liu,Guofu Zhou,Jinyou Xu
This study introduces a facile method for the controlled growth of addressable planar arrays of highly luminescent, catalyst-free 1,4-bis(5-phenyloxazol-2-yl)benzene (POPOP) nanowires. By employing a hollow mask over a faceted sapphire substrate, simultaneous control over the position and orientation of the nanowires is achieved through a mask-confined graphoepitaxial growth, offering substantial advantages over traditional post-growth assembly techniques. High-temperature annealing creates parallel nanogrooves on the sapphire surface, inducing a graphoepitaxial effect that aligns the nanowires with a consistent [102] crystallographic axis. The hollow mask further aids in precisely localizing nanowire growth through its shadowing effect. Optoelectronic investigations reveal that these nanowires emit intense and stable blue photoluminescence at room temperature, with a broad spectrum spanning from 400 to 600 nm. This luminescence is achieved through excitation by continuous-wave ultraviolet light or two-photon absorption using femtosecond infrared light. Notably, the emission quantum efficiency of POPOP nanowires reaches 59 %, a remarkable improvement over the 12 % observed in powder counterparts when excited with 405 nm light. Transit absorption spectra indicate that ground state bleaching and excited state absorption display consistent kinetics within a 100 ps time window, suggesting the same origin from singlet excitons. The precise alignment and positioning of these nanowires make them viable for in-situ integration into photodetectors with rapid ultraviolet light responses. This study advances the controlled growth of catalyst-free nanowire arrays and enhances the understanding of the optoelectronic properties of POPOP nanowires.
研究领域:
材料科学
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纳米科技
·
光电子学
·
凝聚态物理
·
表面科学
·
有机半导体
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2021
·Vol. 64
·期 8
·2008-2016
·
IF 8.273
Wen Xin,Lin Chensheng,Luo Min,Fan Huixin,Chen Kaichuang,Ye Ning
[PO 4 ] 3− possesses small microscopic second-order susceptibility and polarizability anisotropy, which inherently result in weak second-harmonic generation (SHG) and small birefringence. Herein, a new noncentrosymmetric phosphate, [C(NH 2 ) 3 ] 3 PO 4 ·2H 2 O, was successfully designed and synthesized by a solution evaporation method. [C(NH 2 ) 3 ] 3 PO 4 ·2H 2 O without metal ions is composed of planar conjugated guanidine cations and PO 4 tetrahedrons, which are connected by hydrogen bonds, forming a three-dimensional network. Physical property measurements indicate that the title compound displays an SHG response of 1.5 × KH 2 PO 4 (KDP) and a larger birefringence (0.055@546.1 nm) compared with most reported ultraviolet nonlinear optical phosphates. Furthermore, first-principles calculations reveal that the π-conjugated planar [C(NH 2 ) 3 ] + cations and [PO 4 ] 3− groups are responsible for its excellent linear and NLO properties.
研究领域:
材料科学
·
光学工程
·
无机化学
·
晶体工程
·
非线性光学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Deshan Cheng,Mantang He,Wenbin Li,Jihong Wu,Jianhua Ran,Guangming Cai,Xin Wang
Growing of ZnO nanoparticles on PET films without crystal seeding has been achieved by employing polydopamine as the anchor. The PDA layer was formed on the surface of PET film by the polymerization of dopamine. The PDA-PET was dipped into zinc precursors for hydrothermal growth of ZnO nanoparticles. Cluster-like ZnO nanoparticles were obtained and the special structure was affected by the growing time and zinc ion concentration. The surface morphology, structure and properties were characterized, and the functions including antimicrobial activity and UV protection of the ZnO-coated PET film were investigated. The developed facile hydrothermal approach without seeding will benefit the development of UV resistant and antimicrobial PET films.
研究领域:
材料科学
·
纳米技术
·
表面功能化
·
生物医用材料
·
高分子材料
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 11
·期 3
·2202195
·
IF 10.05
Xiaojing Li,Zilong Chen,Fuming Li,Fangfang Zhang,Zhihua Yang,Shilie Pan
A long-lasting challenge in ultraviolet (UV) nonlinear optical (NLO) materials design is to combine conflicting and harsh properties into one structure, including wide UV transparency, strong NLO efficiency, and moderate birefringence to realize phase-matching at short wavelength. A fluorine-directed material design strategy is adopted to accelerate the process of finding NLO materials with optimal performances. In this work, taking LiB 3 O 5 (LBO) as a maternal structure, one O atom with two F atoms is substituted and LiNaB 6 O 9 F 2 which possesses novel double interpenetrating 3 [B 6 O 9 F 2 ] ∞ networks and fluorine-directed optimal performances including enhanced birefringence and phase-matching capacity is successfully obtained. The perfect balance among deep-UV cutoff edge, large second-harmonic generation (SHG) response (1.1 × KDP), and moderate birefringence (0.067 at 1064 nm) of LiNaB 6 O 9 F 2 makes it a promising UV NLO crystal.
研究领域:
材料科学
·
晶体化学
·
非线性光学
·
功能材料
·
固体化学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Shusheng Pan,Ziyue Rao,Yujie Wu,Zhiyu Liu,Jun Ge,Shan Zhang
In this study, a temperature self-regulating solar reactor based on VO 2 thermochromic coating is demonstrated. The temperature of solar reactor can be stabilized at 68.8 °C, which is corresponded to the critical point of metal-to-insulator transition of VO 2 . By employing the solar reactor, the orthorhombic phase CsPbI 3 microwires have been synthesized through solution phase reaction route. Strong emission peaks at 490 nm and 470 nm have been observed in CsPbI 3 microwires under ultraviolet and soft X-ray excitation, respectively. The high performance photodetector based on CsPbI 3 microwire show a detectivity of 1.09 × 10 14 Jones, responsivity of 4.72 A/W, rapid rise and decay time of 0.96 and 0.93 s at 325 nm. Our results demonstrate that the temperature self-regulating solar reactor can be applied for energy-saving solution phase reactor for synthesizing high quality inorganic materials.
研究领域:
材料科学
·
纳米光电子学
·
无机功能材料
·
能源材料
·
半导体器件
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 2
·1699-1705
·
IF 2.324
Teng Fei,Chen Dong,Ma Yuzhe,Ji Shaohua,Liu Jiaojiao,Wang Tianhua,Tang Jie,Cao Lifeng,Teng Bing
N,N -dimethylamino-4′-N′-methylstilbazolium 2,4,6-trimethylbenzenesulfonate (DSTMS)-graphene ex-situ and in-situ composite films with 2% concentration of graphene were first prepared and systematically investigated. The crystallinity of DSTMS-based composite films were confirmed by XRD analysis, and the functional groups of composite films can be obtained by FT-IR. Optical absorptions were recorded using UV–Vis-NIR spectral analysis, and the band gap and extinction coefficient of the films were calculated. The thermal stability of the composite films were analyzed by TG/DSC. The pressure sensitive resistance test showed that the pressure sensitive signal of the composite films were significantly increased after graphene added, while the signal of DSTMS film eventually disappears. This work expands the application of organic nonlinear crystal DSTMS in optics and electricity by doping graphene.
研究领域:
材料科学
·
凝聚态物理
·
功能材料
·
非线性光学
·
纳米复合材料
·
电学性能
·
光学性能
·
热分析
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Xueqian Yan,Jin Qian,Xiangjun Pei,Lihong Zhou,Rui Ma,Mingkuan Zhang,Yufei Du,Linqin Bai
In this study, a magnetic NiFe 2 O 4 /MWCNTs/BiOI composite were fabricated and applied for enhanced and sustainable photocatalytic degradation of doxycycline (DOX) under UV light irradiation. The as-synthesized material was characterized by a series of techniques and its photocatalytic property was assessed via a couple of batch tests. With the pH at 3.0 and NiFe 2 O 4 /MWCNTs/BiOI loading of 1.5 g L −1 , the DOX degradation (at 45 mg L −1 ) efficiency could achieve 92.18% with the reaction rate constant k of 0.0072 min −1 . The high mineralization of DOX suggests the strong oxidation of both the parent pollutant and the intermediary products in the ternary catalyst system. DRS spectra indicated that compared with BiOI , the introduction of NiFe 2 O 4 and MWCNTs reduces the band gap energy of the NiFe 2 O 4 /MWCNTs/BiOI. The quenching test illustrates that h + , OH and O 2 − all functioned in the developed photocatalytic system, where O 2 − and h + play the dominant roles in DOX degradation. The more efficient electron-h + separation and more oxidizing species induced by UV light resulted in the significant improvement of DOX abatement in the developed coupling system compared with that on either BiOI or NiFe 2 O 4 /MWCNTs. The magnetic property of NiFe 2 O 4 /MWCNTs/BiOI enables its easy separation of the solid catalyst from the reaction solution and the sustainable application in the photocatalysis . Based on the intermediates of DOX decomposition identified by UPLC-MS, the possible degradation routes were proposed accordingly.
研究领域:
环境化学
·
材料科学
·
光催化
·
水污染治理
·
纳米复合材料
·
药物降解
✓ 已验证
DOI
高影响因子
PROCEEDINGS OF THE COMBUSTION INSTITUTE
·
2018
·Vol. 37
·期 1
·565-573
·
IF 5.336
Xiaoyuan Zhang,Yuyang Li,Chuangchuang Cao,Jiabiao Zou,Yan Zhang,Wei Li,Tianyu Li,Jiuzhong Yang,Philippe Dagaut
The kinetics of propanal oxidation was studied in a jet-stirred reactor (JSR) at atmospheric pressure. The investigated temperature range is from 450 to 800 K at two different equivalence ratios (0.35 and 4.0). Thanks to the synchrotron vacuum ultraviolet photoionization mass spectrometry (SVUV-PIMS), critical intermediates were identified, including methylperoxy, methyl hydroperoxide , ethylperoxy, ethyl hydroperoxide, α-lactone, β-propiolactone and ketohydroperoxides. A kinetic model for propanal oxidation was also developed and validated against the present experimental results, as well as those available from the literature. Main chain-branching pathways under the investigated conditions were analyzed based on present experimental data and kinetic model . The O 2 addition reaction to the propanoyl radical and subsequent oxidation reactions play an important role in determining the oxidation rate of propanal under fuel-lean conditions, especially in the low-temperature oxidation region. Under fuel-rich conditions, the decomposition of the propanoyl radical is predominant and C 2 H 5 relevant reactions consequently determine the kinetics of oxidation of propanal.
研究领域:
物理化学
·
燃烧化学
·
反应动力学
·
分析化学
·
能源化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 10
·16524-16532
·
IF 3.83
Muhammad Yousaf,Asma Noor,Shuai Xu,Majid Niaz Akhtar,Baoyuan Wang
Yttrium iron garnet (YIG) nanoparticles (NPs) doped with rare earth (RE) metal ions (Y 2.5 Sm 0.5 Fe 5 O 12 , Y 2.5 Nd 0.5 Fe 5 O 12 ) were successfully synthesized by sol-gel auto combustion approach. The cubic crystalline structure and morphology of the prepared garnet ferrite NPs were analyzed by X-ray diffractometer (XRD) and field emission scanning electron microscopy (FESEM). The cubic crystalline garnet phase of the synthesized YIG, Sm-YIG and Nd-YIG samples was successfully achieved at 950 °C sintering temperature . The force constant and absorption bands were estimated by using Fourier transform infrared spectroscopy (FTIR). The doping effect of RE metal ions on the chemical states of YIG were examined by x-ray photoelectron microscopy (XPS). The valence band (from 12.63 eV to 13.22 eV), conduction band (from 10.89 eV to 11.34 eV) edges and optical bandgap values of RE doped YIG samples were calculated using UV–Vis spectroscopy and ultraviolet photo electron spectroscopy (UPS). The magnetic analysis of the prepared NPs was studied using vibrating sample magnetometer (VSM). The XPS analysis of RE doped YIG samples exhibit the existence of RE (Sm +3 , Nd +3 ) contents on the surface of YIG ferrite by decreasing the oxygen lattice in garnet structure. The optical bandgap (from 1.74 eV to 1.88 eV) explains the semiconducting nature of the synthesized NPs. The UPS results confirm the valence band position of YIG doped samples. The saturation magnetization and remanence of RE doped garnet ferrite samples increased from 13.45 to 18.83 emu/g and 4.06–6.53 emu/g, respectively.
研究领域:
材料科学
·
纳米科技
·
固体物理
·
无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Chen Zhou,Hui Zhang,Jianian Cheng,Hongyi Li,Sadeh Beysen
Two new isostructural lead borates , Pb 8 Mg(BO 3 ) 6 and Pb 8 Ca(BO 3 ) 6 , have been synthesized via high temperature solution method. The single crystal structures of title compounds contain ∞ [Pb 8 B 6 O 18 ] 2- double layers composed of planar BO 3 triangles, Pb(2)O 9 and distorted Pb(1)O 5 polyhedra, these layers condense in c -axis, and the MgO 6 (or CaO 6 ) polyhedra fill into the layers, forming a three-dimensional framework. The stereochemical activity of lone pair (SCALP) electrons were found in the Pb(1)O 5 polyhedra, which combine with the BO 3 units, generating strong optical anisotropy . The calculated birefringences of Pb 8 Mg(BO 3 ) 6 and Pb 8 Ca(BO 3 ) 6 using first-principles method are 0.15@1064 nm and 0.12@1064 nm, respectively, which are comparable to the commercial α -BaB 2 O 4 (α-BBO) crystal and imply that they probably can be used as birefringent materials. The electronic structures, density of states of title compounds were calculated by density functional theory (DFT). Meanwhile, the TG-DSC curves, infrared spectral and UV–Vis–NIR diffuse reflectance spectral were measured.
研究领域:
无机化学
·
材料科学
·
晶体工程
·
非线性光学材料
·
固体化学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 18
·1900299
·
IF 2.622
Huidong Yang,Hong Wang,Jingang Feng,Yumin Ye,Wenna Liu
Asymmetric divinyl monomers are attractive candidates for constructing functional polymer thin films owing to their ability to undergo further reactions after polymerization. Here, the first solventless synthesis of poly(allyl methacrylate) (PAMA) film with retention of abundant allyl groups using initiated chemical vapor deposition (iCVD) is reported. It is demonstrated that lower substrate and filament temperatures lead to better allyl retention, while higher temperatures lead to intramolecular cyclization. The retained allyl groups can be further crosslinked under UV light, and the crosslinking degree can be easily tuned by adjusting the exposure time. Patterning of iCVD PAMA films with 20 µm resolution using a TEM grid as photomask is also demonstrated. The reported synthesis method suggests possible solventless incorporation of AMA in thin films as a latent crosslinker or anchoring sites for further functionalization. The solventless patterning can also extend patterning technique to solvent-sensitive and non-planar substrates.
研究领域:
高分子材料科学
·
表面化学
·
功能薄膜
·
光响应材料
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）