详细信息
Carbon quantum dot synthesis of a Ag/PCQD composite for the visual detection of Hg2+ in dH(2)O solution and seawater samples ( SCI-EXPANDED收录)
文献类型:期刊文献
英文题名:Carbon quantum dot synthesis of a Ag/PCQD composite for the visual detection of Hg2+ in dH(2)O solution and seawater samples
作者:Wu, Lin-Li Li, Xiao-Hong Liu, Ying Leng, Yan-Li Li, Yang Cai, Xiao-Hua
第一作者:Wu, Lin-Li
通信作者:Li, XH[1];Cai, XH[1]
机构:[1]Guizhou Minzu Univ, Sch Chem Engn, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China
第一机构:Guizhou Minzu Univ, Sch Chem Engn, Guiyang 550025, Guizhou, Peoples R China
通信机构:corresponding author), Guizhou Minzu Univ, Sch Chem Engn, Guiyang 550025, Guizhou, Peoples R China.
年份:2022
卷号:46
期号:46
起止页码:22213-22221
外文期刊名:NEW JOURNAL OF CHEMISTRY
收录:;WOS:【SCI-EXPANDED(收录号:WOS:000882114200001)】;
基金:This work was financially supported by the National Natural Science Foundation of China (No. 52160010), Guizhou Provincial Science and Technology Projects (No. JZ[2018]1077) and National University Students' Innovation and Entrepreneurship Project (No. 202110672027).
语种:英文
摘要:In this study, carbon quantum dots (PCQDs) were synthesized via a simple, green, single-step ultrasonic method from palm mane with a fluorescence quantum yield (QY) of 38.5%. A stable silver nanoparticle/carbon quantum dot (Ag/PCQD) composite was prepared using PCQDs and silver nitrate with a color change from brown to red-brown. When Hg2+ from Hg(ClO4)(2) was introduced to the Ag/PCQD composite in dH(2)O solution and seawater samples, a color change from red-brown to colorless was observed. The interactions between the PCQDs, Ag/PCQDs and Ag/PCQDs after the addition of Hg2+ were investigated using TEM and XPS analyses. The analyses showed that the formation of a silver-mercury (AgHg) amalgam could be the working mechanism of this system. Moreover, we found that the Ag/PCQDs can also detect Hg2+ from HgCl2, Hg(NO3)(2), Hg(OAc)(2) and CH3HgCl (organic mercury species) with good detection performance in dH(2)O solution and seawater samples. It is vital to develop a sensing method that can detect Hg2+ in seawater samples. Therefore, an efficient sensing platform for detecting Hg2+ in pure water solution and seawater was constructed using the Ag/PCQD composite prepared from palm mane biomass. When Hg2+ from Hg(ClO4)(2) was added to dH(2)O and 3.5% saline solution, the calculated detection limits were found to be 35.4 and 14.3 nM, respectively. The detected concentration exceeds the Hg2+ concentrations commonly found in seawater (similar to 300-400 nM). Furthermore, it is possible to improve the on-site analysis of complex seawater samples with colorimetric response without the need for complex equipment. Our strategy provides a highly innovative, rapid and low-cost method for the detection of Hg2+ in complex water matrices and seawater samples.
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