期刊
JOURNAL OF CLEANER PRODUCTION
卷 172, 期 -, 页码 2910-2918出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2017.11.123
关键词
Laminaria japonica; Silver nanoparticle; Steam autoclave; High-concentration; Size distribution; Seed germination
资金
- National Research Foundation South Korea [2017R1C1B-5017360]
- Dongguk University-Seoul research fund
- King Saud University [RG-1438-078]
This study demonstrates a green route for the preparation of high-concentration suspensions of silver nanoparticles (AgNPs), by incubating AgNO3 with Laminaria japonica algal extract. The rate of AgNPs synthesis significantly increased within 2 min of initiating the incubation and elevating temperature from 90 degrees C to 120 degrees C. This method was also suitable for preparing AgNPs at ambient temperature but required 48-72 h for completion. A hydrothermal process (steam autoclave) resulted in accelerated temperature-controlled reduction of AgNO3 in which AgNO3 reduction to metallic AgNPs with robust control over optical and structural properties was successfully established using steam autoclaving at 100 kPa and 121 degrees C for 20 min. The process enabled a homogeneous reaction resulting in a narrow size distribution of AgNPs. Isotropic growth of AgNPs was evident under diverse synthetic conditions, designed considering various reaction factors including temperature, pH, extract 'concentration, and AgNO3 ratios. Freeze-drying was used to increase yield and shelf-life of the nanoproduct and prevent aggregation. The AgNPs showed no significant effects on seed germination of either Triticum aestivum and Phaseolus mango. However, they influenced lengths of shoots and roots in both plant species in a dose-dependent manner. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据