Department of Chemistry, Amity Institute of Applied Sciences, Amity University, Noida, India.
Department of Chemistry, Amity Institute of Applied Sciences, Amity University, Noida, India; Amity Institute of Nanotechnology, Amity University, Noida, India.
Ecotoxicol Environ Saf. 2018 Dec 15;165:357-366. doi: 10.1016/j.ecoenv.2018.09.024. Epub 2018 Sep 11.
The inducement of plant leaf extracts for the synthesis of various nanostructures has intrigued researchers across the earth to explore the mechanisms of biologically active compounds present in the plants. Herein, a green modified hydrolysis route has been employed for the synthesis of bismuth oxychloride i.e. BiOCl-N, BiOCl-T and BiOCl-A using plant extracts of Azadirachta indica (Neem), Ocimum sanctum (Tulsi), and Saraca indica (Ashoka), and; simultaneously, without plant extract (BiOCl-C), respectively. The as-prepared samples were examined by several microscopic and spectroscopic techniques which revealed that the biosynthesized BiOCl attained certain favorable features such as hierarchical nano-flower morphology, higher porosity, higher specific surface area and narrower band gap compared to BiOCl-C. The degradation of methyl orange (MO) and bisphenol A (BPA) using biosynthesized BiOCl were improved by 21.5% within 90 min and 18.2% within 600 min under visible light irradiation, respectively. The photocurrent response, electrochemical impedance spectroscopy (EIS) and photoluminescence (PL) studies indicated the effective inhibition of the electron-hole pair recombination and enhanced photocatalytic activity of the biosynthesized BiOCl.
植物叶片提取物诱导合成各种纳米结构，引起了全球研究人员的兴趣，促使他们探索植物中生物活性化合物的作用机制。在此，采用绿色改性水解法，分别使用植物提取物印楝（Neem）、神圣罗勒（Tulsi）和印度娑罗树（Ashoka）中的阿魏酸（Azadirachta indica）、丁香酸（Ocimum sanctum）和没食子酸（Saraca indica），合成了 BiOCl-N、BiOCl-T 和 BiOCl-A，同时，不使用植物提取物（BiOCl-C）也合成了 BiOCl。通过多种微观和光谱技术对所制备的样品进行了检查，结果表明，与 BiOCl-C 相比，生物合成的 BiOCl 具有某些有利的特性，如分级纳米花形态、更高的孔隙率、更高的比表面积和更窄的带隙。在可见光照射下，用生物合成的 BiOCl 处理甲基橙（MO）和双酚 A（BPA）的降解率分别提高了 21.5%和 18.2%，分别在 90 分钟和 600 分钟内达到 90%。光电流响应、电化学阻抗谱（EIS）和光致发光（PL）研究表明，电子-空穴对复合得到有效抑制，生物合成的 BiOCl 的光催化活性得到增强。
