Direct growth of carbon microfibres on SiO 2 particles by chemical vapour deposition from ethanol

Micro & nano letters

article

Feng Wang¹  Xiaofang Qin¹  Lixia Yang¹  Shanmin Gao¹  Qingyao Wang¹  Zhenglong Yang¹ 

[1] School of Chemistry and Materials Science, Ludong University

关键词: transmission electron microscopy;    X-ray diffraction;    carbon fibres;    Raman spectra;    scanning electron microscopy;    catalysis;    catalysts;    chemical vapour deposition;    silicon compounds;    carbon microfibres;    ethanol;    catalytic chemical vapour deposition;    carbon precursor;    catalyst precursor;    carrier gas;    X-ray diffraction;    high-resolution transmission electron microscopy;    surface morphology;    scanning electron microscopy;    Raman spectroscopy;    graphitic structures;    temperature 1200.0 degC;    time 5.0 hour;    size 100.0 mum;    size 5 mum to 10 mum;    SiO2;    C;   

DOI  :  10.1049/mnl.2018.5068

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Awsaj (Lycium barbarum) is a plant belong to family Solanaceae serves as a good source of bioactive compounds like phytosterols which have many important biological activity. Literature survey available so far revealed that there was no studies about Iraqi wild Awsaj phytosterols especially B-sitosterol, there for the objective of this study was to examine the efficiency of ultrasound assisted extraction (probe and bath) as compared to the conventional (Soxhlet) extraction method for extraction of phytosterols especially B-sitosterol from fruits, leaves, stems and roots of Iraqi wild Awsaj plant. This goal was achieved by comparing the extraction mass yield, also by a quick and easy approach for identification and quantification of bioactive B-sitosterol in four parts of Awsaj using high performance thin layer chromatography (HPTLC) which confirm the presence of B-sitosterol in four parts of Iraqi Awsaj plant and the results clarify that the root part of Iraqi Awsaj plant extracted by probe UAE give the highest concentration (0.610 mg/ml) of B-sitosterol followed by fruits (0.465mg/ml), leaves(0.405mg/ml) and the least was stems(0.275mg/ml); according to these; isolation and purification of B-sitosterol from petroleum ether fraction of Awsaj roots was done by preparative HPLC. The isolated compound (B-sitosterol) was identified by measuring melting point, FT-IR, TLC and preparative HPLC.

【 授权许可】

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