Aversatile β-cyclodextrin functionalized silver nanoparticle monolayer for capture of methyl orange from complex wastewater  

作　　者：Jun Liu Cancan Zhang Shaoxuan Zhang Huajiang Yu Wei Xie 

机构地区：[1]Key Lab of Advanced Energy Materials Chemistry(Ministry of Education),Renewable Energy Conversion and Storage Center,College of Chemistry,Nankai University,Tianjin 300071,China [2]College of Chemistry,State Key Laboratory of Elemento-Organic Chemistry,Nankai University,Tianjin 300071,China

出　　处：《Chinese Chemical Letters》2020年第2期539-542,共4页中国化学快报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(Nos.51601098,21775074 and 21861132016);the Natural Science Foundation of Tianjin(No.17JCQNJC05400);the National Key Research and Development Project of China(Nos.2017YFA0206702 and 2016YFB0901502)。

摘　　要：The toxic organic dye contaminants in wastewater are extremely harmful to the ecosystem.Surface enhanced Raman scattering(SERS) is a technique with high sensitivity and chemical specificity which fulfills the requirements for monitoring dye contaminants in wastewater.However,as one of the common dye contaminants,methyl orange(MO) has very weak affinity to metallic surfaces and is difficult to be detected by SERS at low concentrations.Therefore,a new type of SERS substrate with Ag nanoparticle monolayer functionalized by mono-6-deoxy-6-thio-β-cyclodextrin(β-CD-SH) was prepared to efficiently capture and detect MO in wastewater with a limit of detection of 5×10^(-7) mol/L.The hydrophobic cavity of β-CD is responsible for the efficient trap and enrichment of MO on the Ag NPs surface,achieving a strong SERS signal of MO at low concentrations and at different pH values.This study provides new insight into designing a well-performed adsorbent for the capture and detection of organic contaminants.The toxic organic dye contaminants in wastewater are extremely harmful to the ecosystem.Surface enhanced Raman scattering（SERS） is a technique with high sensitivity and chemical specificity which fulfills the requirements for monitoring dye contaminants in wastewater.However,as one of the common dye contaminants,methyl orange（MO） has very weak affinity to metallic surfaces and is difficult to be detected by SERS at low concentrations.Therefore,a new type of SERS substrate with Ag nanoparticle monolayer functionalized by mono-6-deoxy-6-thio-β-cyclodextrin（β-CD-SH） was prepared to efficiently capture and detect MO in wastewater with a limit of detection of 5×10-7 mol/L.The hydrophobic cavity of β-CD is responsible for the efficient trap and enrichment of MO on the Ag NPs surface,achieving a strong SERS signal of MO at low concentrations and at different pH values.This study provides new insight into designing a well-performed adsorbent for the capture and detection of organic contaminants.

关 键 词：Dye CONTAMINANTS Methyl ORANGE SERS CYCLODEXTRIN WASTEWATER 

分 类 号：X703[环境科学与工程—环境工程] TB383.2[一般工业技术—材料科学与工程]