文献类型：期刊文献

英文题名：Effects of cellulose/salicylaldehyde thiosemicarbazone complexes on PVA based hydrogels: Portable, reusable, and high-precision luminescence sensing of Cu2+

作者：Yue, Yiying[1] Gu, Jiamin[1] Han, Jingquan[2] Wu, Qinglin[3] Jiang, Jianchun[4,5]

第一作者：Yue, Yiying

通信作者：Yue, YY[1];Han, JQ[2];Jiang, JC[3]

机构：[1]Nanjing Forestry Univ, Coll Biol & Environm, Nanjing 210037, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Jiangsu, Peoples R China;[3]Louisiana State Univ, Sch Renewable Nat Resources, Ctr Agr, Baton Rouge, LA 70803 USA;[4]Nanjing Forestry Univ, Coll Chem Engn, Nanjing 210037, Jiangsu, Peoples R China;[5]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China

年份：2021

卷号：401

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000581684900170)】；

基金：This work was supported by the National Natural Science Foundation of China (31901274, 31770609), the 13th China Special Postdoctoral Science Foundation (2020T130303), the China Postdoctoral Science Foundation (2019M661854), the Postdoctoral Science Foundation of Jiangsu Province (2019K142), the Natural Science Foundation of Jiangsu Province for Outstanding Young Scholars (BK20180090), the 333 Project of Jiangsu Province (BRA2018337), the Qinglan Project of Jiangsu Province (2019) and the Analysis and Test Center of Nanjing Forestry University.

语种：英文

外文关键词：Fluorescence probe; Quench; Hydrogel; Detection; TOCN/ST

摘要：Novel portable, high-precision, and reusable fluorescent polyvinyl alcohol (PVA)-borax hydrogel sensors were prepared to detect Cu2+ in aqueous environment. A TEMPO-oxidized cellulose nanofibers/salicylaldehyde thiosemicarbazone (TOCN/ST) complex was further incorporated into the PVA-borax matrix. The in situ polymerization of TOCN/ST complex enhanced the mechanical properties of the hydrogels and improved the accuracy of detection. The resultant hydrogels were thermo reversible, and it converted to the liquid state during heating, which could greatly reduce the deviations caused in the detection of solid sensors. After cooling, the hydrogel could transform into the solid condition, which was easily portable. The sensor induced a significant luminescence quenching to the Cu2+ at 485 nm, with a detection limit of 0.086 M. In the presence of ethylenediaminetetraacetic acid disodium, Cu2+ were tightly seized, causing the liberation of TOCN/ST complex and thus, a reversible "ON-OFF-ON" fluorescence behavior was displayed. The fluorescence intensity was maintained at 82 % after 10 uses, and the mechanical strength was maintained at 85 % after 3 uses. The anti-bacterial activity test also confirmed the TOCN/ST complex was extremely potent in suppressing the growth and reproduction of Escherichia coli. The proposed hydrogel provides a new insight into the detection of Cu2+ in aqueous environments.