Leftover Kiwi Fruit Peel-Derived Carbon Dots as a Highly Selective Fluorescent Sensor for Detection of Ferric Ion

Chemosensors

Ashok K. Sundramoorthy¹  Rajendran Suresh Babu²  Raji Atchudan³  Suguna Perumal³  Thomas Nesakumar Jebakumar Immanuel Edison³  Yong Rok Lee³  Rajangam Vinodh⁴ 

[1] Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India;Laboratory of Experimental and Applied Physics, Centro Federal de Educação Tecnológica, Celso Suckow da Fonseca (CEFET/RJ), Av. Maracanã 229, Rio de Janeiro 20271-110, Brazil;School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea;School of Electrical and Computer Engineering, Pusan National University, Busan 46241, Korea;

关键词: kiwi fruit peel;    hydrothermal-carbonization;    carbon dots;    fluorescent sensor;    ferric ion detection;   

DOI  :  10.3390/chemosensors9070166

来源: DOAJ

【 摘 要 】

Recently, the use of natural products for the synthesis of carbon dots (CDs) has received much attention. Herein, leftover kiwi (Actinidia Deliciosa) fruit peels were successfully turned into beneficial fluorescent carbon dots (KN-CDs) via the hydrothermal-carbonization route. KN-CDs 1 and KN-CDs 2 were prepared without and with ammonium hydroxide, respectively. KN-CDs 1 and KN-CDs 2 were systematically characterized by various analytical techniques. Synthesized KN-CDs showed spherical-shaped morphology with narrow size distribution and excellent optical properties with excitation-independent behaviors. The quantum yields of KN-CDs 1 and KN-CDs 2 were calculated as 14 and 19%, respectively. Additionally, the KN-CDs possess excellent prolonging and photostability. Because of the excellent optical properties of KN-CDs, they were utilized as fluorescent sensors. The strong fluorescence of the KN-CDs was selectively quenched by Fe³⁺ ion, and quenching behavior showed a linear correlation with the concentrations of Fe³⁺ ion. KN-CDs 1 and KN-CDs 2 showed the detection of Fe³⁺ ions within the concentration range of 5–25 µM with the detection limit of 0.95 and 0.85 µM, respectively. Based on the turn-off sensing by the detection of Fe³⁺ ions, KN-CDs would be a promising candidate as a selective and sensitive fluorescent sensor.

【 授权许可】

Unknown