文献类型：期刊文献

英文题名：Environmentally friendly synthesis of photoluminescent biochar dots from waste soy residues for rapid monitoring of potentially toxic elements

作者：Zhang, Liting[1,2];Liu, Wanpeng[1];Zhuang, Haifeng[1];Zhang, Jin[1];Chen, Chao[2];Wang, Yibing[2];Shan, Shengdao[1]

机构：[1]Zhejiang Univ Sci & Technol, Zhejiang Prov Key Lab Recycling & Ecotreatment Wa, Hangzhou 310023, Zhejiang, Peoples R China;[2]East China Univ Sci & Technol, Sch Biotechnol, Biomed Nanotechnol Ctr, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：9

期号：38

起止页码：21653

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20193007224141);WOS:【SCI-EXPANDED(收录号:WOS:000476751400007)】；

基金：This research was funded by the Key Research and Development Plan of Science and Technology Department of Zhejiang Province (2019C02053 & 2017C03010), and Youth Fund Project of Zhejiang University of Science and Technology (2019QN31).

语种：英文

外文关键词：Carbon - Waste treatment - Doping (additives) - High resolution transmission electron microscopy - Hydrothermal synthesis - Atomic force microscopy - Fluorescence - X ray photoelectron spectroscopy

摘要：Single-step environmentally friendly synthesis of biochar dots (BCDs) was developed using hydrothermal treatment of waste biomass. Using soy residue as the carbon precursor, the resultant BCDs had strong and stable photoluminescence. Characterization by atomic force microscopy (AFM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy indicates that the BCDs prepared were water soluble, spherical, oxygenous and nitrogen-doped carbon nanoparticles with 10-20 nm in diameter. The fluorescence quantum yield of the BCDs was 3.7%. The use of the BCDs as a very effective fluorescent probe for label-free, rapid, and selective detection of Hg2+ and Fe3+ ions was further demonstrated with good linear relationships at 0-50 mu M and 10-50 mu M, respectively. The minimum detection limits of Hg2+ and Fe3+ were 100 nM and 30 nM. Furthermore, the feasibility of using the BCDs for monitoring of Hg2+ and Fe3+ in open waters was also established.