Graphene quantum dots embedded cellulose based sensing paper for heavy metal ions detection in groundwater

• Main Authors: Chiu, Chih-Hsuan, 邱智萱
• Other Authors: Bai, Hsun-Ling
• Format: Others
• Language: en_US
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/t5dvu5

碩士 === 國立交通大學 === 環境工程系所 === 107 === In recent years, the groundwater pollution was more and more serious. Actually, the Fe(III) and As(V) was the common heavy metal ions in ground water. Simple, inexpensive and rapid sensing systems are highly essential for a myriad of uses. Intrinsic properties of emerging paper-based analytical devices have been demonstrated to have a considerable potential to fulfill such demand. This work reports an easy-to-use, low cost, and disposable paper-based sensor in which the functionalized graphene quantum dots (GQDs) embedded cellulose matrix acts as a fluorescence probe for selective and sensitive determination of Fe(III) and As(V). After functionalization, the 3,4-dihydroxyaniline (DHA-GQDs) and poly dimethyl diallyl ammonium chloride (PDADMAC-GQDs) were used for detecting Fe(III) and As(V), respectively. The cellulose of fluorescent paper was extracted from rice straw through TEMPO oxidation. The fluorescent paper was applied to detect Fe(III) and As(V) in ground water successfully. It opens a new avenue for simple and fast screening of HMIs and offers numerous possibilities for versatile applications.