{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T13:07:09Z","timestamp":1774012029759,"version":"3.50.1"},"reference-count":51,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2019,7,18]],"date-time":"2019-07-18T00:00:00Z","timestamp":1563408000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Qinghai Science &amp; Technology Department of China","award":["2018-HZ-817"],"award-info":[{"award-number":["2018-HZ-817"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Totally water-soluble N-doped Carbon dots (N-CDs) were synthesized by a green hydrothermal method from biomass using Highland barley as a carbon source and ethanediamine as nitrogen source. TEM and XRD showed the graphitic amorphous structure and narrow diameter distribution of these N-CDs. N-doping to the crystal lattice and carrying many hydrophilic groups on the surface of N-CDs were verified by XPS and FT-IR. The as-synthesized N-CDs emitted strong blue fluorescence at 480 nm and owned a relatively high quantum yield of 14.4%. The product also could sensitively and selectively detect Hg2+ ions in the range of 10\u2013160 \u03bcM and the limit of detection was equal to 0.48 \u03bcM.<\/jats:p>","DOI":"10.3390\/s19143169","type":"journal-article","created":{"date-parts":[[2019,7,19]],"date-time":"2019-07-19T03:14:41Z","timestamp":1563506081000},"page":"3169","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":134,"title":["Green Hydrothermal Synthesis of N-doped Carbon Dots from Biomass Highland Barley for the Detection of Hg2+"],"prefix":"10.3390","volume":"19","author":[{"given":"Yadian","family":"Xie","sequence":"first","affiliation":[{"name":"Chemical Engineering College, Qinghai University, Xining 810016, China"}]},{"given":"Dandan","family":"Cheng","sequence":"additional","affiliation":[{"name":"School of Life Science, Wuchang University of Technology, Wuhan 430223, China"}]},{"given":"Xingliang","family":"Liu","sequence":"additional","affiliation":[{"name":"Chemical Engineering College, Qinghai University, Xining 810016, China"}]},{"given":"Aixia","family":"Han","sequence":"additional","affiliation":[{"name":"Chemical Engineering College, Qinghai University, Xining 810016, China"}]}],"member":"1968","published-online":{"date-parts":[[2019,7,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"6726","DOI":"10.1002\/anie.200906623","article-title":"Luminescent Carbon Nanodots: Emergent Nanolights","volume":"49","author":"Baker","year":"2010","journal-title":"Angew. 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