FIBERS AND POLYMERS
·
2017
·Vol. 18
·期 11
·2204-2211
·
IF 1.113
Xu QingBo,Gu JiaYuan,Zhao Yang,Ke XiaTing,Liu XiangDong
L-cysteine (Cys) and silver nanoparticles (Ag NPs) were successfully linked onto the cotton fabric surfaces. The Cys molecules were covalently linked to the cotton fibers via esterification with the cellulose hydroxyl groups, and the Ag NPs tightly adhered to the fiber surface via coordination bonds with the Cys thiol groups. As a result, the Ag NPs coating on the cotton fabric showed an excellent antibacterial function with an outstanding laundering durability. The bacterial reduction rates (BR) efficiency reached 100 % for Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). After 50 consecutive laundering cycles, the bacterial reduction rates (BR) against E. coli and S. aureus were maintained over 97 %. It has potential applications in a wide variety of fields such as sportswear, socks, and medical textile.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 7
·3680-3686
·
IF 2.936
Zhongsheng Wu,Yinyin Lin,Juanjuan Xing,Mengying Zhang,Jinbo Wu
Metal–organic frameworks (MOFs), produced by metal ions coordinated to organic linkers, have attracted increasing attention in recent years. For the utilization in MOFs in numerous applications, achieving positioned MOF growth on surfaces is essential to fabricate multiple-functional devices. We develop a novel miniaturized method to realize surface-tension-confined assembly of HKUST-1 in femtoliter droplet arrays. HKUST-1 crystal arrays grown by evaporation-induced crystallization are observed, and five typical crystal morphologies (i.e., hexagonal, irregular hexagonal, triangular, arc-like and ribbon-like crystals) are found in the large area on the patterned substrate during crystallization. Our research provides a better understanding of the formation mechanism of MOF crystals in confined sessile droplets. The key factors determining HKUST-1 single-crystal growth are the internal flows in an evaporating droplet and consequently aggregation induced by the combination of metallic Cu(II) and BTC ions. Understanding the formation of different morphologies of HKUST-1 crystals is useful to guide the production of crystals with desired shapes for various applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITE INTERFACES
·
2018
·
IF 1.048
Yunlu Pan,Xuezeng Zhao,Yingjie Liu,He Zhang
Colloidal crystal template for inverse opal hydrogel is constructed by vertical deposition method using monodispersed silica nanospheres. By adjusting the concentration of monodispersed silica nanospheres, it is found that well-structured silica template with more than 20 layers is formed when the concentration of the silica is 3.5 wt%. To enhance its strength, the prepared template is put in an oven at 500 °C for 2 h. The surface of the template is divided into many blocks by cracks formed in the process of heat treatment. The number of blocks varies with the rising time of the temperature from 25 to 500 °C. Under the same magnification, blocks formed with the rising time of 150 min can be nearly 4 times more than the blocks with a rising time of 300 min or 500 min, which means the slow rising velocity of the temperature can lead to a better colloidal crystal template with fewer blocks.
✓ 已验证
产品关联
DOI
高影响因子
Petroleum Science
·
2024
·
IF 6
Jian-Xun Wu,Shuo-Fan Li,Qi-Fu Li,Feng Yan,Qi-Lin Zhou,Shuai Ma,Ya-He Zhang,Suo-Qi Zhao,Quan Shi
Heavy oil is an important resource in current petroleum exploitation, and the chemical composition information of heavy oil is crucial for revealing its viscosity-inducing mechanism and solving practical exploitation issues. In this study, the techniques of high-temperature gas chromatography and high-resolution mass spectrometry equipped with an electrospray ionization source were applied to reveal the chemical composition of typical heavy oils from western, central, and eastern China. The results indicate that these heavy oils display significant variations in their bulk properties, with initial boiling points all above 200 °C. Utilizing pre-treatment and ESI high-resolution mass spectrometry, an analysis of the molecular composition of saturated hydrocarbons, aromatic hydrocarbons, acidic oxygen compounds, sulfur compounds, basic nitrogen compounds, and neutral nitrogen compounds within the heavy oil was conducted. Ultimately, a semi-quantitative analysis of the molecular composition of the heavy oil was achieved by integrating the elemental content. The semi-quantitative analysis results of Shengli-J8 heavy oil and a conventional Shengli crude oil show that Shengli-J8 heavy oil lacks alkanes and low molecular weight aromatic hydrocarbons, which contributes to its high viscosity. Additionally, characteristic molecular sets for different heavy oils were identified based on the semi-quantitative analysis of molecular composition. The semi-quantitative analysis of molecular composition in heavy oils may provide valuable reference data for establishing theoretical models on the viscosity-inducing mechanism in heavy oils and designing viscosity-reducing agents for heavy oil exploitation.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2024
·
IF 4.8
Sisi Shang,Jie Wang,Man Yuan,Qi You,Zihao Song,Wei Liu,Xin Ye,Jian Yang,Sheng Cui
Advanced ceramic aerogel has been much highlighted as an emerging lightweight thermal insulation material, but problems such as structural collapse or shrinkage at high temperature greatly limit practical applications. In this work, (YErYbGdLa) 2 Zr 2 O 7 high entropy ceramic aerogel (RZ) was prepared using rare earth salts, through the sol-gel method followed by CO 2 supercritical drying techniques and high-temperature calcination. Moreover, the RZ was successfully synthesized after heat treatment at 850 °C, exhibited a typical “pearl chain” three-dimensional (3D) porous structure. The microscopic morphology and thermal properties were also investigated after examination at different temperatures. Results showed that the RZ exhibited exceptional structural and phase stability at a temperature of 1400 °C for 2 h. Subsequently, the RZ reinforced by mullite fiber felt was calcined at high temperature and annealed for 2 h (FARZ). The original low density (0.1824 g·cm −3 ) and low thermal conductivity (0.0263 W·m −1 ·K −1 at 25 °C, 0.126 W·m −1 ·K −1 at 1000 °C) of the aerogels were maintained. The back temperature of the 10 mm thick FARZ was only 125 °C following exposure to a butane blowtorch flame at 1300 °C for 600 s. In addition, these results were well supported by theoretical ANSYS-Fluent simulation results. It had excellent thermal insulation performance and was expected to be applied in the ultra-high temperature thermal protection of spacecraft in the future.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Zheng Liang,Xiaoliang Li,Pengyan Luan,Zhenxin Yang,Jiale Su,Xuanhe Li,Fushun Li,Dongming Zhang,Jinquan Huang,Haikun Zhu,Dengke Wang,Zheng-Hong Lu,Qiang Zhu
The recent advancement of stretchable photoelectronics has catalyzed revolutionary transformations in various cutting-edge fields. However, the stretchable transparent electrodes (STEs), which are vital components ensuring signal conduction in stretchable photoelectronics, pose a challenge due to the rigid and fragile nature of conventional conductive materials. In this study, we demonstrated a prestrain transfer technique for fabricating STEs using PEDOT:PSS. The resulting STEs achieved a sheet resistance of approximately 50 Ω/sq by leveraging the benefits of methanesulfonic acid treatment and incorporating a carbon-nanotube blend in PEDOT:PSS. The fabricated STEs exhibited exceptional transparency exceeding 90% and remarkable stability over 1000 stretching cycles without degradation in conductance. An in situ investigation was conducted to visualize the deformation of the PEDOT:PSS film and its association with the electrical ductility of the STEs. The prestrain transfer was found to induce kirigami-type cracks and out-of-plane microwrinkles in the PEDOT:PSS film. These structures effectively alleviate stress concentration and compensate for strain during stretching loading, thereby imparting enhanced stretchability and electrical ductility to the STEs. However, once the stretching strain exceeded the prestrain threshold, numerous microcracks emerged on the PEDOT:PSS film, leading to electrical failure of the STEs due to a significant rise in resistance. The incorporation of carbon nanotubes was demonstrated to modulate crack structures, thereby enhancing both the mechanical and electrical ductility of STEs. Additionally, a theoretical model was proposed to quantitatively analyze the morphological evolutions in the PEDOT:PSS film while establishing its correlation with the mechanical and electrical properties of the STEs. The parameters associated with crack structures, sensitivity of resistance to cracks, and tensile limit of PEDOT:PSS were extracted to elucidate the underlying mechanisms of prestrain engineering on the electrical ductility and failure of the STEs. The present results offer guidance for experimental and theoretical approaches for optimizing the fabrication process of stretchable electronics.
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Chao Shen,Junhua Huang,Shiqi Hu,Ying Chen,Lingling Zhang,Chu Yi,Xin Hu,Yaofei Chen,Lei Chen,Gui-shi Liu,Yunhan Luo
Surface plasmon resonance (SPR) optical fiber sensors are appealing for biomolecular detection due to their inherent characteristics such as flexibility, real-time performance, and high sensitivity. Concurrently, incorporating SPR sensors into wearable devices has emerged as a significant strategy. However, the majority of traditional SPR optical fiber sensors utilize spectrometers for optical readout, which leads to a relatively bulky overall size of the sensing system. Herein, we present the first optical fiber device capable of conducting sensitive SPR measurements and providing direct electronical readout. This has been achieved by integrating a hyperbolic-metamaterial SPR (HMM-SPR) sensor with an on-fiber graphene/PMMA photodetector (oFGPD). The HMM, composed of three pairs of Au/ZrO 2 , has been employed to develop highly sensitive SPR sensors. The oFGPD, which was constructed by transferring a single layer of graphene onto a tapered fiber region and subsequently covering it with a PMMA protecting film, achieved a high responsivity of 3.42×10 6 A W −1 (at 14.07 pW) and a rapid response time of approximately 90 ms at 1550 nm. More significantly, we have incorporated an SPR sensor based on a side-polished fiber (SPF) into the oFGPD, enabling an electronical readout technique for environmental refractive index (RI) SPR signals in a broad potential spectral range, from visible to near-infrared, all within a more compact device. This integration has been successfully validated in the detection of urea and glucose concentrations in artificial perspiration. This approach provides a novel direction for SPR sensor detection and establishes a solid foundation for their application in wearable technology.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xinzhe Shi,Rongrong Deng,Qibo Zhang
Co 3 O 4 -based electrode materials exhibit great potential for utilization as efficient catalysts for the oxygen evolution reaction (OER), especially in acidic media. However, enhancing their catalytic stability remains a crucial challenge. Herein, we present a facile electrochemical deposition approach coupled with calcination treatment to achieve in-situ growth of active Co 3 O 4 films from a deep eutectic solvent with water as the modifier. The incorporation of water optimizes the structure of fabricated Co 3 O 4 by increasing oxygen vacancies and elevating the Co 2+ /Co 3+ ratio, enabling it to sustain the OER in 0.5 M H 2 SO 4 . Impressively, the catalyst grown on Pt/Ti substrate exhibits stable operation over 125 h at 10 mA cm −2 . Attenuated total reflection-fourier transform infrared (ATR-FTIR) spectroscopy reveals that OER on the defect-rich Co 3 O 4 catalyst occurs through both lattice oxygen mediated mechanism (LOM) and adsorption evolution mechanism (AEM).
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Xiong Jian,Liu Yanhua,Xia Liufen,Jiang Guodong,Xiao Dong,Mishra Yogendra Kumar
Titanium dioxide (TiO 2 ) has been widely studied as an inexpensive and efficient electrochromic material. However, slow response speed and poor cycling performance still constrain the further application of TiO 2 electrochromic materials. In this work, a series of cobalt-doped TiO 2 electrochromic films were fabricated via hydrothermal method combined with a spin-coated approach. The effects of doped cobalt ions on the electrochemical and electrochromic performance of TiO 2 were explored. The cobalt-doping concentrations on the morphology and electrochromic performance of the samples were investigated by means of XRD, XPS, FESEM, HR-TEM, and electrochemical techniques. It is found that the ionic diffusion coefficient of the 0.5% Co-TiO 2 composite film is 6.44 × 10 −10 cm 2 /s, the coloring efficiency is 34.11 cm 2 /C, and the coloring and bleaching switching time are 1.92 s and 10.71 s, respectively. Moreover, the 0.5% and 1% Co-TiO 2 composite films showed superior cyclic performance than pristine TiO 2 . This indicates that the appropriate amount of Co doping can significantly enhance the electrochromic properties of titanium dioxide films.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhiyuan Ning,Ruoran Li,Kai Xin,Li Liu,Leicheng Wen,Pan Liu,Ping Ning
Transition-metal sulfides doped with various elements show great promise as highly effective catalysts for the hydrogen evolution reaction (HER), potentially serving as alternatives to Pt-based electrocatalysts . Defect engineering has been identified as a key strategy to enhance the HER activity of such catalysts. This study proposes an effective strategy to generate numerous topological/geometric defects on hollow spherical Mn-doped cobalt sulfide (MnS–CoS) via plasma etching . MnS–CoS catalysts with well-defined cavity structures were successfully prepared using a combination of template-assisted and hydrothermal synthesis methods. Under plasma induction, these catalysts exhibited uniformly formed nanocavity structures with a built-in electric field, which uniformly enhanced their topological/geometric defect levels. The plasma-etched MnS–CoS catalyst demonstrated significantly enhanced HER activity, exhibiting an excellent overpotential of 172 mV at a current density of 10 mA·cm⁻ 2 in alkaline media and a low Tafel slope of 120 mV·dec⁻¹. These improvements can be attributed to the remarkable conductivity of Co and Mn, along with the unique hollow spherical nanostructure of the material, which contained numerous gaps that promoted electron movement and electrolyte penetration, thereby enhancing the overall catalytic performance. The synergistic effects of heteroatom doping and plasma modulation played a crucial role in achieving outstanding catalytic performance toward the HER. Density-functional theory calculations based on a structural model of MnS–CoS-p confirmed that the introduction of defects and heteroatoms reduced hydrogen adsorption: the Gibbs free energy decreased from 0.72 eV for CoS to 0.23 eV for MnS–CoS-p. The excellent HER activity of the MnS–CoS materials stemmed from the abundance of reactive heterostructured interfaces, which optimized the electronic configuration and, thus, accelerated H 2 O adsorption and dissociation. This study highlights the potential of combining plasma-assisted defect manipulation and transition-metal-element doping to design high-performance catalysts. The findings also offer valuable insights into the development of environment-friendly energy-conversion technologies.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Weihua Zou,Yujiao Zhang,Naike Zou,Delin Sun
A delignified longitudinal-cutting poplar veneer-based epoxy resin composite (TLPE) with excellent transmittance, haze, flexibility and wood fiber art texture, that was prepared by delignifing longitudinal-cutting poplar veneer (LPV) and filling the delignified LPV with epoxy resin (ER). The TLPE has retained the porous structure and wood fiber art texture of LPV due to the fact that it is not completely filled with resin. The changed benzene skeleton and the ether (C-O-C) were found in the TLPE, that should be due to the chemical combination between the benzene of filled ER and the cellulose of delignified LPV, and the chemical reaction between the benzene and the cellulose yielded the C-O-C. Parts of the TLPE that are completely filled with the ER, that can reach a transmittance of approximately 90 % and a haze of approximately 90 %. Moreover, due to the combined action between the fibril of delignified LPV and the ER, the TLPE has high refractive index fluctuation in the perpendicular direction of fiber and excellent flexibility (the elongation at break: 15 %). When the TLPE is used as the building material, the TLPE can provide a comfortable lighting effect after the light passes through it, it can also accommodate various streamlined and natural artistic shapes with wood fiber art texture in buildings, and it can also achieve a balance between science and art in the building through its optical, styling, and textural advantages.
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Zhicheng Gu,Peiyuan Chen,Cheng Wang,Aiguo Wang,Yonghui Wang,Peng Qian,Xiangkun Li
The hydrophobicity nature of the waste carbon fiber felt (WCF) surface results in the formation of a weak interface with the paste during the curing process of WCF concrete, which seriously affects the performance of WCF concrete and the reuse of WCF. To address this problem, this paper utilized polydopamine (PDA) for the functionalization of WCF to enhance bonding between WCF and paste. The wettability , Ca 2+ complexation, and functional groups of PDA coating on WCF were analyzed by contact angle, ICP-OES, and XPS , respectively. Additionally, the effects of incorporating PDA-functionalized WCF on the flowability , compressive strength , hydration kinetics , pore structure , water absorption capillary , and SEM of mortars were tested. Experimental results showed that the PDA coating improved the wettability of WCF and enhanced the flowability of WCF mortar. What's more, the PDA coating could chelate Ca 2+ and promote the formation and deposition of hydration products on the WCF surface, resulting in a denser interfacial transition zone (ITZ). Compared with ordinary WCF mortar, the compressive strength of the PDA-modified WCF mortar was increased by 18% at 28d. Furthermore, the capillary water absorption of the modified group mortar was also decreased by up to 13%, significantly enhancing the durability of mortars. This paper presents a green and simple bio-inspired method to strengthen the ITZ between WCF and paste, which is fundamentally different from the traditional modification methods, and also offers a theoretical basis and technical foundation for the sustainable utilization of WCF.
✓ 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）