APPLIED OPTICS
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2018
·Vol. 57
·期 21
·6213-6218
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IF 1.791
Lin Wang,Yungang Zhang,Xue Zhou,Zhiguo Zhang
This paper investigated a potential instrument for carbon disulfide in situ measurement with high precision and strong anti-interference capability. A compact and automated carbon disulfide detection system was developed using a fiber opto-electronic sensing device. A custom software interface based on LabVIEW was developed. The multi-wavelength least-squares method based on differential optical absorption spectroscopy was employed for improved detection and the anti-interference capabilities of the system. The detection limit of the system (signal-to-noise ratio=3) was determined to be 1 ppb per meter. Using this scheme, the reliability of a liquid-seal was verified to have carbon disulfide leakage. Although the liquid level of the liquid-sealed carbon disulfide showed no significant change over 24 h, a residue concentration of over 30 ppm remained detectable on the surface.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Simeng Wu,Jing Qiao,Yunxiang Tang,Xue Zhang,Xiangwei Meng,Shuyan Hao,Haoyuan Tian,Baoding Li,Xiaoyang Zuo,Jiurong Liu,Lili Wu,Zhou Wang,Fenglong Wang
One-dimensional carbon-based materials have emerged as promising electromagnetic wave absorption agents due to their outstanding conductivity, high stability, low weight, and easy availability. Properly optimizing their electromagnetic parameters is expected to further enhance the electromagnetic wave attenuation capacity. In this work, efficient Cu 9 S 5 /C nanocomposite fibers are prepared by a combined approach of electrospinning and subsequent carbonization-sulfurization processes. The Cu 9 S 5 nanoparticles with size of ca. 100–200 nm were homogeneously embedded in fibrous carbon matrix with diameter of 300 nm. For electromagnetic wave absorption, the optimized composited nanofibers (Cu 9 S 5 /C-3) exhibited an extremely superb reflection loss of −65.4 dB (9.5 GHz, 2.7 mm) at a lower mass fraction (20 wt%). And the effective absorption bandwidth could be up to 4.1 GHz (8.0–12.1 GHz) with a matching thickness of 2.9 mm, covering the whole X-band. Electromagnetic wave attenuation mechanism investigation revealed that the performance enhancement originated from the synergy of various loss pathways, including interfacial polarization, dipole polarization, and conductive loss. The unique hierarchical structure from particle embedding, one-dimensional fiber, to three-dimensional network further amplified the performance advantages of each component. This work is anticipated to provide a feasible strategy to synthesize sulfide/carbon binary composite fibers for efficient electromagnetic wave absorption.
研究领域:
材料科学
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电磁学
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DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2022
·
IF 6.449
Zhansi Dou,Yang Zhang,Zhongyang Li,Zhiqiang Fang,Hao Li,Jing Fang
Lignin is a high-quality precursor of carbon materials, rich in content and low in price. Sodium lignosulfonate was used as a raw material to prepare a high-efficiency catalyst for the esterification of adipic acid and methanol to synthesize dimethyl adipate by a one-step carbonization sulfonation process. The catalyst synthesized by this method has high sulfonic acid groups, and the catalytic process does not need to use sulfuric acid and other advantages. Through characterization analysis, study the relationship between the structure of the catalyst and the catalytic performance. A preliminary study on the industrial application of the catalyst has been done. The optimal reaction conditions were reached when the catalyst dosage is 20% of the mass of adipic acid , the alkyd ratio is 8:1, the stirring speed is 600r/min, the reaction temperature is 346 K, and the reaction time is 120 min
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2018
·Vol. 410
·期 21
·5113-5122
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IF 3.307
Cai Pingyang,Yi Xiaofeng,Song Hongjie,Lv Yi
Material morphology-dependent cataluminescence (CTL) sensing characteristic and application are presented in this work. Hierarchical hollow microspheres CeO 2 were synthesized via the hydrothermal reaction of glucose and N, N -dimethyl-formamide (Glu-DMF). SEM, XRD, TEM, HRTEM and BET were used to characterize the prepared CeO 2 materials. Compared with CeO 2 cubics (CeO 2 Cubs), CeO 2 hierarchical hollow microspheres (CeO 2 HMs) show an enhanced CTL response to carbon disulfide. The response and recovery times of CeO 2 HMs-based CTL sensor towards carbon disulfide are about 8 s and 20 s, respectively. CeO 2 HMs exhibits a linear CTL response to carbon disulfide in the concentration range of 0.50~10 μg•mL -1 with an excellent sensitivity and selectivity. These results suggest that CeO 2 HMs will be a highly promising CTL sensing material for the detection and monitoring carbon disulfide.
CeO 2 hierarchical hollow microspheres (CeO 2 HMs) were synthesized via the hydrothermal reaction of glucose and N, N-dimethyl -formamide (Glu-DMF). Meanwhile, the prepared CeO 2 HMs shows commendable CTL response towards carbon disulfide. Due to the excellent analytical performance of designed CeO 2 HMs-based sensor for carbon disulfide, it has potential application value in various locations
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）