Controllable synthesis of high surface area Nb 2 O 5 nanowires by polyamide

Micro & nano letters

article

Zhenwei Zhang¹  Jintao Zhang¹  Yue Chuanjun¹  Hu Jianheng²  Zheng Shifu² 

[1] School of Mathematical Sciences and Chemical Engineering, Changzhou Institute of Technology;School of Chemical Engineering, Changzhou University

关键词: nanowires;    polymers;    adsorption;    catalysts;    dyes;    photochemistry;    niobium compounds;    nanofabrication;    Nb2O5;    time 2 h;    dye degradation;    photocatalyst reaction;    tricyclic aromatic ring;    methyl orange;    Rhodamine B;    neural red;    methylene blue;    adsorption;    BET surface area;    crystal size;    isopropanol;    structure direct agent;    Pebax;    soft chemical method;    polyamide;    nanowires;    controllable synthesis;   

DOI  :  10.1049/mnl.2017.0104

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Background: Oxidative stress is a multifactorial global health disorder that disrupts all levels of cell function. Therefore, therapeutic intervention using reliable, affordable and non-toxic natural sources is crucial. Aim: The aim of this article was to determine the chemical constituents and antioxidant activity of 10 essential oils (EOs) from Calophyllum inophyllum Linn using 2,2-diphenyl-1- picrylhydrazyl (DPPH) and hydrogen peroxide (H 2 O 2 ) methods. Setting: Plant sample was collected at the Botanical Garden, University of Ibadan, Nigeria. Extractions and antioxidant assay were performed at the Organic Chemistry Research Laboratory, University of Ibadan, Nigeria. Gas chromatography-mass spectrophotometry (GC-MS) analysis was carried out at the School of Pharmacy, University of Camerino, Italy. Methods: The chemical constituents were determined using GC-MS. The oils were extracted using an all-glass Clevenger-type apparatus and the antioxidant activity was determined using DPPH and hydrogen peroxide assays. Results: A total of 102 compounds were identified in EOs from C. inophyllum Linn, which are mostly monoterpenes, sesquiterpenes and their oxygenated derivatives. The oils exhibited concentration-dependent activity with reference to standard synthetic antioxidants. Root wood had the highest antioxidant activity with the half maximal inhibitory concentration (IC 50 ) of 3.19 mg/mL compared to ascorbic acid (2.84 mg/mL) and butylated hydroxyl anisole (BHA) (2.97 mg/mL). In the H 2 O 2 antioxidant assay, root wood had the highest antioxidant activity with IC 50 of 2.78 mg/mL compared to ascorbic acid (2.20 mg/mL) and BHA (2.92 mg/mL). Conclusion: The in vitro chemical compositional analysis of EOs from C. inophyllum Linn confirms the presence of compounds responsible for the antioxidant properties of the plant.

【 授权许可】

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