JOURNAL OF CHROMATOGRAPHY A
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2015
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IF 4.169
Liang Hao,Dapeng Wu,Kun Ding,Hu Meng,Xiaohui Yan,Yafeng Guan
Thermal desorption–gas chromatography–mass spectrometer (TD–GC–MS) technique has been widely used for analysis of semi-violate organic compounds on atmospheric aerosol . To prevent GC column from being damaged by fine solid particles during thermal desorption process, glass wool as filter mat is indispensible. However, the filtration efficiency has never been validated. In this paper, the most penetrating particle size and the minimum packing thickness of glass wool were calculated based on classical filtration theory. According to the calculation results, packing parameters of glass wool were optimized experimentally using silica particles. It is demonstrated that glass wool with a packing thickness of 30 mm, solidity of 0.039 can effectively block these fine solid particles from penetrating at normal thermal desorption conditions ( T = 300 °C, u = 0.4–4 cm/s). Finally, the filtration efficiency of glass wool was further confirmed with real PM2.5 samples. Under the validated filtration condition, TD–GC–MS was applied for the analysis of non-polar organic compounds on real PM2.5 samples, and very good results were obtained.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2026
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IF 5.2
Kuanping Gong,Yongquan Jiang,YongMan Choi
We describe the synthesis and characterization of CaSe 1-x S x :Eu (0 ≤ x ≤ 1) phosphors, uniformly coated with alternating metal oxide layers via a customized fluidized-bed chemical vapor deposition (FB-CVD) technique. Through precise sintering control, the phosphor composition is engineered for tunable red emission under 450 nm blue excitation. First-principles calculations show that Eu 2+ substitution introduces localized Eu 4f states just below the conduction band minimum, enabling efficient blue excitation and red emission, while sulfur substitution enhances lattice stability by increasing intrinsic chalcogenide migration barriers. This energy-level configuration explains efficient Eu 2+ luminescent center activation, yielding intense red emission. Moreover, Se substitution with S increases the anionic migration barrier progressively, consistent with experimental observations of CaSe 1-x S x degradation in humid environments due to Se's inherent instability. However, this moisture susceptibility is markedly reduced via uniform, conformal FB-CVD barrier coatings on individual phosphor particles. Stabilized CaSe 1-x S x phosphors serve as promising components in high-performance warm white light-emitting diodes (W-LEDs), enabling blue-to-red light conversion. As a result, fabricated W-LEDs retain >95% of initial luminance after 1000 h of operation, with negligible chromaticity coordinate shifts.
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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2025
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IF 6.2
Jie Ma,Helei Dong,Yuxin Miao,Yu Wang,Zhen Jia,Qiulin Tan
In₂O₃-IHFO (7 wt% hafnium-doped In₂O₃) thin-film thermocouples were fabricated on alumina substrates using pulsed laser deposition. A composite protective layer consisting of alumina and nano-silica was subsequently applied to enhance thermal stability. Cross-sectional analysis revealed a uniform, dense and well-defined film structure. Thermoelectric testing demonstrated that the protective layer effectively mitigates film volatilization at high temperatures, significantly enhancing thermocouple stability and performance at high temperatures. The maximum operating temperature reached 1550°C (hot junction), with excellent repeatability (≤2.4 %) in thermal cycling tests. The 9-hour high-temperature endurance test exhibits remarkable stability. These findings highlight a promising protective strategy for thin-film applications in extreme environments.
研究领域:
材料科学
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热电领域
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Feiyue Wang,Xue Song,Yongde Liu,Jie Zhang,Jihong Zhao,Yue Chen
Diclofenac (DCF), a widely used pharmaceutical ingredient, exhibits long-lasting properties and significant ecotoxicity in aquatic ecosystems. In this study, a new granular adsorbent, GSBE@C H-CTAB , was synthesized to remove DCF by initially granulating powder spent bleaching earth carbon (SBE@C) with polytetrafluoroethylene (PTFE) emulsion as a binding agent, followed by a co-modification process involving H 2 SO 4 and cetyltrimethyl ammonium bromide (CTAB). The adsorption capacity of the prepared adsorbent for DCF under the best conditions was 4.26 mg/g. In a wide pH range, GSBE@C H-CTAB could maintain a high adsorption capacity and show a good reusability. The presence of the three cations inhibited the adsorption of DCF (inhibition effect: Mg 2+ >Al 3+ >Na + ). The adsorption process conformed to the pseudo-second-order kinetic model and Langmuir isotherm model. From the theoretical evaluation results, it could be inferred that DCF molecules were adsorbed on GSBE@C H-CTAB surface in both horizontal and non-horizontal directions at all operating temperatures. The main mechanisms of adsorption included electrostatic interaction, pore filling interaction, π-π interaction and H bond interaction. The granular adsorbent GSBE@C H-CTAB prepared in this study could effectively remove DCF, treat waste with waste, and solve the problem that powder adsorbent was easy to lose and difficult to recover, which was of great significance for the remediation of polluted water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
LANGMUIR
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2024
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IF 3.7
Man Li,Min Luo,Xiaoxiao Niu,Angsen Sheng,Zhen Wang,Xiaoqing He,Huaiyu Bu,Gang Xie
Synthesis methods of carbon nanomaterials have been developed vigorously in recent years, among which a simple, green, and mature approach is of more research significance. Carbon nanomaterials have depicted an impact on the growth and development of plants. In this study, a new type of carbon nanomaterial, superhydrophilic carbon aerogel (CA), was synthesized via a hydrothermal process using carbohydrates and water-soluble polymers as raw materials. Characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, powder X-ray diffraction, and N2 adsorption analysis, the exemplified CA presented to have porous three-dimensional network structure composed of individual particles with diameters of 25 nm, with reactive surface, single composition, high specific surface area (89.94 m2·g–1), and wide range of density variation. The 9 mg·mL-1 CA suspension had a significant positive effect on the root growth of wheat seedlings, with promoted root elongation (about 67.17% longer) and root diameter (about 28.95% thicker) compared with those of the control group. The cytological results suggested that CA treatment triggered the propagation of meristematic cells, and the increased number of meristematic cells (65.79% more than the control group) led to enhanced root growth by upregulated expression of related phytohormone genes in wheat seedlings.
研究领域:
植物学
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材料科学
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农业科学
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产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
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IF 8.1
Jingjie Yu,Yuhan Zhang,Jiabao Guo,Xinrui Shu,Qinqin Lu,Qiang Chen
3D-printed polyetheretherketone (PEEK) scaffolds are developed as novel bone substitutes, however, their bioinert surface hinders osteogenesis and modifying PEEK scaffolds without blocking their inter-connected porous structure is challenged. In this study, 45S5 bioactive glasses (BG) were homogeneously coated on PEEK scaffolds inspired by traditional sand-casting. The structure of PEEK scaffolds was preserved under shaping effect of BG fillers. Modulus, coating yield and hydrophilicity of scaffolds after different thermal treatment time were comparatively investigated. Excellent hydroxyapatite-forming ability of BG-coated scaffolds was confirmed by mineralization study. In-vitro assessments, BG-coated scaffolds cultured with MC3T3-E1 cells presented potential as bone implants with excellent cytocompatibility and osteogenic properties. Following similar coating strategy, conductive particles, multi-component particles and template particles were also coated on PEEK surface. The proposed methodology highlights a useful approach towards producing tunable biomedical coatings and microstructure on porous PEEK scaffolds for bone tissue engineering.
研究领域:
生物材料
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组织工程
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生物医学工程
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材料科学
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Zihao Li,Zuozhu Yin,Wenbo Xiao,Yuhua Chen,Chenggang Yang,Yidan Luo,Zhen Hong,Mingshan Xue
Given the increasing contamination of freshwater supplies, it is essential to effectively treat industrial wastewater. However, treating industrial wastewater using a single method is challenging due to the presence of complex contaminants like petroleum, organic dyes, bacteria, and other complex contaminants. In this study, we present a straightforward and scalable approach to prepare multifunctional nanocellulose-based membranes (NM) that exhibit superhydrophobicity, self-cleaning, oil/water separation, photocatalysis, and anti-bioadhesion properties. To begin with, we created NM by extruding fiber slurry onto a stencil and drying it. Next, we built a polyurethane (PU)/ZIF‐8/1H, 1H, 2H, 2H‐perfluorooctyltriethoxysilane (POTS)-based superhydrophobic layer by spraying it over the NM's surface. By employing the aforementioned processes, we successfully integrated multiple functions into a single superhydrophobic NM. Our results demonstrate that the NM-PU/ZIF-8/POTS membrane exhibits superior hydrophobicity performance, with a high-water contact angle (166.8 ± 0.8°) and a low rolling angle (5 ± 0.3°). Moreover, these samples retain high-water contact angles and low rolling angles even in harsh environments such as acid and alkali solutions, high temperatures, abrasion resistance, UV aging resistance, bending and folding, tape peeling, and self-cleaning. The NM-PU/ZIF-8/POTS membrane also exhibits high and stable oil-water separation performance, with a separation efficiency of 94.6% and a relatively high separation flux (133.2 L·m −2 ·h −1 ). At the same time, the NM-PU/ZIF-8/POTS membrane exhibits water-in-oil emulsion separation ability. The membrane’s stability, effectiveness, and reusability were demonstrated through ten repetitions of degradation experiments using aqueous methylene blue solution, with the NM-PU/ZIF-8/POTS membrane exhibiting an excellent degradation rate (>94%). Finally, the bioadhesion resistance test indicated a reduction of 69.1% in the adhesion rate of the NM-PU/ZIF-8/POTS membrane. Overall, the creation of the NM-PU/ZIF-8/POTS membrane serves as a useful inspiration for the practical application of superhydrophobic NM in multifunctional integration, while also broadening the scope of membrane applications.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2023
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IF 5.4
Yuhan Zhang,Jingjie Yu,Jiabao Guo,Guandi He,Yonghe Zhao,Qinqin Lu,Junzhi Wu,Xinrui Shu,Xiao Lin,Qiang Chen
Modification of porous titanium (PT) implants with biological coatings is being challenged due to their inert surface and complex internal structure. A facile flow-casting technique has been utilized to prepare a bioceramic coating consisting of 45S5 bioactive glass (BG) and core-shelled [email protected] particles homogeneously on the entire surface of PT. The addition of [email protected] nanoparticles facilitated the sintering of BG and subsequently enhanced the adhesion of the coating. Slightly delayed hydroxyapatite formation was also detected probably due to minimized release and consumption of calcium ions . In-vitro assessments of the coating cultured with MC3T3-E1 osteoblasts and Staphylococcus aureus were carried out to assess their potential as multifunctional bone implants with excellent bioactivity and antibacterial properties. A template for producing robust and multi-component ceramic coatings on PT and other porous implants with tailorable biological properties for bone tissue engineering has been established.
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DOI
高影响因子
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