Low-temperature preparation method for red-light emitted CQDs (carbon quantum dots)

• Main Authors: LU ZUNMING, ZHANG XINGHUA, YUAN KANG, WEI HAIFEI, LIU HUI, QIN RUOHAN, JI XUEFENG
• Format: Patent
• Language: Chinese; English
• Published: 16.10.2018
• Subjects: ADHESIVES; CHEMISTRY; DYES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NANOTECHNOLOGY; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; POLISHES; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

The invention provides a low-temperature preparation method for red-light emitted CQDs (carbon quantum dots). The method comprises following steps: o-phenylenediamine and 1,8-diaminonaphthalene are added to N,N-dimethylformamide for dissolving, and stirring is performed for 10-15 min; a solution is added to a hydrothermal reactor for sealing, the temperature of the solution is increased to 120-200DEG C and kept for 6-18 h, and a CQD solution is obtained; the CQD solution is dried, and powder is obtained and is the red-light emitted CQDs. According to the low-temperature preparation method, the red-light emitted CQDs can be synthesized in a temperature range of 120-200 DEG C, the preparation technology has a low requirement, and the industrialized production is easier. 本发明为种红光发射碳量子点的低温制备方法。该方法包括以下步骤：将邻苯二胺和1,8-萘二胺加入到N,N-二甲基甲酰胺中溶解，搅拌10～15min；将溶液放入水热釜中密闭，然后将溶液温度升高至120-200℃，保温时间6-18h，得到碳量子点溶液，烘干后得到粉末，即红光发射碳量子点。本发明在120～200℃均可合成红光发射的碳量子点，制备工艺要求低，更易于工业化生产。