Highly sensitive colorimetric detection of NH3 based on Au@Ag@AgCl core-shell nanoparticles

作     者：Zhiwei Qiu Yitong Xue Jiyong Li Yunzhi Zhang Xinyi Liang Congying Wen Houjian Gong Jingbin Zeng Zhiwei Qiu;Yitong Xue;Jiyong Li;Yunzhi Zhang;Xinyi Liang;Congying Wen;Houjian Gong;Jingbin Zeng

作者机构：College of Petroleum EngineeringChina University of Petroleum(East China)Qingdao 266580China College of ScienceChina University of Petroleum(East China)Qingdao 266580China Petroleum Engineering Technology Research InstituteSinopec Shengli Oilfield CompanyDongying 257067China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2021年第32卷第9期

页      面：2807-2811页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 070302[理学-分析化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the Graduate Student Innovation Project of China University of Petroleum(East China)in 2020(No.YCX2020031) the financial support by the National Natural Science Foundation of China(Nos.21876206,21505157) the Fundamental Research Funds for the Central Universities(China University of Petroleum(East China),Nos.18CX02037A,20CX05015A) the Youth Innovation and Technology project of Universities in Shandong Province(No.2020KJC007) 

主　　题：NH3 detection Au@Ag@AgCl nanoparticles Localized surface plasmon resonance Etching Colorimetric sensor 

摘      要：Abstract:As an important component of the atmosphere,ammonia(NH_(3))plays a very important role in maintaining the balance of ***,it is also one of the most toxic gases that can cause damage to the human respiratory system and mucous membranes even at low *** such,development of highly sensitive and selective NH_(3)sensors is of high significance for environmental monitoring and health ***,we have synthesized Au@Ag@Ag Cl core-shell nanoparticles(NPs)by oxidative etching and precipitating Au@Ag core-shell NPs using FeCl3 and further used them as optical probes for the colorimetric detection of NH_(3).The sensing mechanism is based on the fact that the etching of NH_(3)on AgCl and Ag shell leads to the variations of ingredients and core-to-shell ratio of the Au@Ag@AgCl NPs,thereby inducing noticeable spectral and color *** replacing the outmost layer of Ag with AgCl,not only is the stability of the sensor against oxygen significantly enhanced,but also is the sensitivity of the method *** method exhibits good linear relationship for the detection of NH_(3)from 0 to 5000 mmol/L with the limit of detection of 6.4 mmol/*** method was successfully applied to the detection of simulated air polluted by NH_(3),indicating its practical applicability for environmental *** method shows great potential for on-site NH_(3)detection particularly in remote area,where a simple,fast,low-cost,and easy-to-handle method is highly desirable.