Method of preparing carbon quantum dots from broccoli and method for detecting silver

• Main Authors: KIM JONG SUNG, ARUMUGAM NANDHINI
• Format: Patent
• Language: English; Korean
• Published: 25.06.2019
• Subjects: ADHESIVES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; DYES; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASURING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; POLISHES; TESTING; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a broccoli carbon quantum dot producing method which can be used as a silver ion sensor by having excellent photoluminescence quenching for silver ions, and a silver detection method using the same. A broccoli carbon quantum dot of the present invention shows excellent photoluminescence quenching for silver ions by having an amine group and a carboxyl group on the surface and facilitating complex formation with silver ions. The broccoli carbon quantum dot producing method of the present invention is environmentally friendly and economical not only by using environmentally friendly broccoli but also by rarely using organic solvents or reactants in a producing process. Moreover, the silver measuring method of the present invention is able to selectively measure silver concentration by using the broccoli carbon quantum dot which has higher photoluminescence quenching efficiency than cationic metal ions such as chromium, manganese, nickel, copper, and iron. The broccoli carbon quantum dot producing method comprises the following steps of: crushing broccoli and mixing the broccoli; thermally treating the broccoli solution; and obtaining carbon quantum dots. 본 발명은 은 이온에 대해 우수한 광발광 ?칭(quenching)을 나타내어 은 이온 감지 센서로 이용가능한 브로콜리 탄소 양자점 제조방법, 이를 이용한 은 검출 방법에 관한 것이다. 본 발명의 브로콜리 탄소 양자점은 표면에 아민기와 카르복실기를 가지고 있어 은 이온과 착물 형성이 용이하므로 은 이온에 대해 우수한 광발광 ?칭(quenching)을 보여준다. 또한, 본 발명의 브로콜리 탄소 양자점 제조방법은 친환경 소재인 브로콜리를 사용할 뿐 만 아니라 제조과정 중에서도 유기용매나 반응물질을 거의 사용하지 않으므로 친환경적일뿐만 아니라 경제적이다. 또한, 본 발명은 은 측정 방법은 크롬, 망간, 니켈, 구리, 철 등의 양이온성 금속 이온에 비해 광발광 ?칭 효율이 높은 브로콜리 탄소 양자점을 사용하므로 선택적으로 은 농도를 측정할 수 있다.