A green luminescence of lemon derived carbon quantum dots and their applications for sensing of V5+ ions

Publication date: December 2019Source: Materials Science and Engineering: B, Volume 251Author(s): Bui Thi Hoan, Tran Thi Thanh, Phuong Dinh Tam, Nguyen Ngoc Trung, Sunglae Cho, Vuong-Hung PhamAbstractA simple approach for the synthesis of luminescent carbon dots (C-dots) has been developed by the hydrothermal treatment of lemon juice as carbon precursor at 240 °C in 12 h. The obtained C-dots were found to emit bright green luminescence. Meanwhile, the C-dots exhibited excitation-dependence, photo-stability, and well dispersibility. The C-dots were used for detection of ion V5+ in water and serum, which was based on V5+ induced luminescence quenching of C-dots. The selectivity experiments revealed that the luminescent sensor was specific for V5+ ions even with interference by high concentrations of other metal ions. Detection limits for V5+ ions was 3.2 ppm. These results suggest that the present C-dots are potential application in optoelectronic, imaging and luminescent probing of V5+ ions.
Source: Materials Science and Engineering: B - Category: Materials Science Source Type: research