CERAMICS INTERNATIONAL
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2018
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IF 3.057
Xiaorong Zhang,Zhixiao Zhang,Yuming Liu,Yanming Wang,Xiying Fu,Yongmei Bai,Guangshuo Wang,Jingbo Mu,Xiaoliang Zhang,Hongwei Che
We studied the effects of particle size of raw materials (B 4 C, TiC and Si powders) on the characteristics of both TiB 2 –SiC composite powders and ceramics. Results show that the size of B 4 C and Si particles hardly affects the size of TiB 2 and SiC particles because B 4 C is decomposed and consumed during the formation of TiB 2 , and Si is melted during the formation of SiC. The size of SiC particles is within the nano and submicron scale. However, the size of TiC particles determines the sizes of TiB 2 particles and TiB 2 grains in the composite ceramics because TiC particles serve as templates to form TiB 2 particles. Consequently, the microstructure and mechanical properties of the TiB 2 –SiC composite ceramics are affected. The TiB 2 –SiC composites fabricated using nano-sized TiC powder possess smaller grain size, better dispersibility and more reasonable crack propagation path, thereby obtaining the optimal mechanical properties (Vickers hardness of 30.2 GPa, flexural strength of 732 MPa and fracture toughness of 7.37 MPa m 1/2 ).
研究领域:
材料科学
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陶瓷工程
✓ 已验证
DOI
高影响因子
JOURNAL OF FORENSIC SCIENCES
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2024
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IF 1.5
Can Hu,Yang Huang,Hongcheng Mei,Hongling Guo,Ping Wang,Yajun Li,Xianhe Deng,Jun Zhu
The stable isotope analysis of black powder (BP) is of great significance for its comparison and source inference. Previous studies have verified the feasibility of distinguishing different BP samples through stable isotopes. However, the impact of raw materials and synthesis processes on the stable isotopes of BP remains unclear. On the one hand, the raw materials of BP are widely sourced, and whether stable isotopes can distinguish different source materials remains to be studied. On the other hand, the synthesis of BP involves the physical mixing of raw materials, and whether this process leads to isotope fractionation also needs further investigation. To address these problems, stable isotope ratios of 27 charcoals, 15 potassium nitrates, 6 self-made and 10 commercial BP samples were analyzed. The results showed that the stable isotope ratios can be utilized to distinguish charcoals and potassium nitrates from different manufacturers and batches. No significant differences in the nitrogen and oxygen stable isotope ratios between the self-made BP and its raw materials were observed, indicating that the physical mixing process does not induce significant fractionation of stable isotopes. However, the carbon stable isotope ratios of charcoal increased (within 2SD) after being synthesized into BP. Due to the utilization of additives and variations in the synthesis process, the correlation between the stable isotope ratios of commercial BP and its raw materials was complex. The findings of this study provide a scientific reference for tracing the source of BP.
研究领域:
法医学
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化学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2024
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IF 8
Zhineng Wu,Hanyu Niu,Jiao Wang,Runnan Guo,Zixuan Yang,Gaolei Liang,Xiaodong Ma
Trichloroethylene (TCE) is a prevalent organic pollutant found in soil. The oxide passivation layer on the surface of micron iron powder inhibits the release of its reducing components, leading to ineffective reduction and purification of TCE in soil. To enhance TCE degradation, a slow-release reduction material " Escherichia sp. F1-micron iron powder" was developed. A novel iron-reducing bacterium, Escherichia sp. F1, was isolated from soil contaminated with chlorinated hydrocarbons. This bacterium demonstrated a sustained iron reduction capability, achieving a reduction rate of 38.7% for Fe(Ⅲ) within 15 days. Genome sequencing revealed that strain F1 harbors 53 functional iron reduction genes and 2 dehalogenation genes. Single-factor experiments identified the optimal conditions for TCE degradation in soil using the coupling material: glucose concentration at 40 mmol/kg, soil water content at 50%, and bacterial inoculum at 1% (v:w). Under these optimal conditions, the coupled material achieved 86.86% degradation of TCE in soil within 28 days. Further analysis using X-ray photoelectron spectroscopy of micron iron powder, soil Fe(Ⅱ) concentration, and soil physicochemical properties demonstrated that the addition of strain F1 to the soil could disrupt the passivation layer of iron oxide on the surface of micron iron powder, promoting the exposure of its reactive sites and internal reducing active components. This resulted in an in situ self-actuated activation of passivated micron iron powder, leading to an improved removal rate and complete dechlorination of TCE in the soil. Soil microbial high-throughput sequencing revealed that the addition of strain F1 regulated the soil bacterial community, significantly enriching of Escherichia-Shigella species associated with iron-reducing functions. This enrichment facilitated the degradation of TCE in the soil through coupling materials. The functional material plays a crucial role in achieving green treatment and risk control of sites contaminated with chlorinated organic pollutants.
研究领域:
环境科学
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微生物学
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污染治理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Yuanyuan Wang,Shenghao Wang,Xueqing Yu,Lei Cao,Minmin Mao,Hadi Barzegar Bafrooei,Zhilun Lu,Kaixin Song,Dawei Wang
The dielectric loss (tan δ) value of stoichiometric SrTiO 3 (ST), prepared using the solid-state reaction method, exhibits a random variation between 0.0006 and 0.01968 at room temperature and a frequency of 1 kHz in the literature. This variability makes it challenging to obtain reliable and reproducible performance for ST-based devices, especially when the underlying reasons are not yet completely understood. This work reports the significant effects of different raw materials, with various forms of TiO 2 , on the dielectric and electrical properties of ST ceramics. The results show that the purity of SrCO 3 and TiO 2 ultimately leads to distinct differences in dielectric properties, impedance properties, activation energy across the ST ceramics. Crystal comparison demonstrates that anatase TiO 2 is more suitable for dielectric applications. These results provide a reasonable explanation for the large variations in reported ST properties in the literature, which emphasizes the critical importance of selecting suitable reagents in ST-based ceramics. This insight opens up a new avenue for design optimization and highlights the promising potential of ST-based ceramics.
研究领域:
材料科学
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陶瓷
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电气工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Jiale Xu,Jingyi Zhang,Benwei Fu,Chengyi Song,Wen Shang,Peng Tao,Tao Deng
Solar-driven interfacial evaporation has received increasing research attention for clean water generation, but freshwater harvesting often occurs only during daytime. Herein, we report a strategy for all-day freshwater harvesting through combining solar-driven interfacial desalination and dew water generation. Through spray-coating carbon nanotubes onto a flexible substrate that has high-infrared emittance in the atmosphere window, a dual functional film was prepared to efficiently absorb solar energy for desalination at daytime and passively cool down the surface temperature to collect dew water at night. By integrating the dual functional film within a three-stage membrane distillation device, the home-made system achieved a drinkable freshwater collection efficiency of 71.1% when desalinating seawater under 1 sun illumination and achieved a dew water collection rate of 0.1 L m–2 day–1 at night. The readily available low-cost raw materials, simple fabrication process of the dual functional films, and the resultant all-day freshwater collection systems make the combined solar-thermal interfacial desalination and dew water collection a promising solution to alleviate the freshwater shortage in many underdeveloped regions, arid areas, and islands.
研究领域:
环境科学
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材料科学
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水资源工程
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可再生能源
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
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IF 4.6
Cong Liu,Yanli Dong,Junmin Wang,Qianqian Wang,Chun Wang,Qiuhua Wu
Phenolic environmental endocrine disruptors (EEDs) pose significant risks to the reproductive and nervous systems. Herein, we synthesized a magnetic OH-anchored porous polymer (M-Pue@TB-HCP2) by linking natural puerarin with 1,3,5-tris(bromomethyl)benzene for the first time. M-Pue@TB-HCP2 showed high extraction recovery (94 %-99 %) for phenolic EEDs (bisphenol S, bisphenol A, bisphenol B and p -tert-butylphenol) thanks to its amphiphilic sites supplying hydrogen bonding and π conjugation interaction. Moreover, M-Pue@TB-HCP2 displayed excellent reusability and long service life. Using M-Pue@TB-HCP2 as magnetic solid-phase extraction adsorbent, coupled with high-performance liquid chromatography-mass spectrometry, a novel method was established for detecting trace EEDs from shrimps, achieving low detection limit (0.80–5.50 ng g −1 for green shrimp, 1.00–4.00 ng g −1 for white shrimp), good spiked recovery of 80.3 %-117 %, relative standard deviation less than 5.7 %. The method has the merits of high sensitivity, good accuracy and excellent reproducibility, making it suitable for the trace analysis of EEDs in shrimps. This work not only provides a new option for rapid and accurate detection of trace EEDs in shrimps but also explores a new strategy for the preparation of efficacious adsorbents by utilizing sustainable raw materials.
研究领域:
环境科学
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高分子化学
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分析化学
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食品安全
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内分泌学
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纳米技术
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吸附技术
✓ 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）