Gqdlarni tayyorlash

Preparation of GQDs GQDs were synthesized according to the reported procedure [39]. In brief, 2 mmol of citric acid and 6 mmol of thiourea were dissolved into 15 ml water, and stirred to form a clear solution. Then, the solution was transferred into 50-ml Teflon lined stainless autoclave and it was heated to 180 C in an electric oven and kept for additional 12 h. The final product was collected by adding ethanol into the solution and centrifuging at 8000 rpm for 15 min. The solid can be easily redispersed into water. The resulted GQD solution could be stored at room temperature for at least 3 months without precipitation.
GQDlarni tayyorlash
GQDlar xabar qilingan protseduraga muvofiq sintez qilindi [39]. Qisqacha aytganda, 2 mmol limon kislotasi va 6 mmol tiokarbamid 15 ml suvda eritilib, shaffof eritma hosil qilish uchun aralashtiriladi. Keyin eritma 50 ml teflon qoplamali zanglamaydigan avtoklavga o'tkazildi va elektr pechda 180 C ga qizdirildi va qo'shimcha 12 soat davomida saqlanadi. Yakuniy mahsulot eritmaga etanolin qo'shib, 8000 rpm tezlikda 15 daqiqa davomida santrifüj qilish orqali yig'ildi. Qattiq moddani suvga osongina qayta tarqatish mumkin. Olingan GQD eritmasi xona haroratida kamida 3 oy davomida yog'ingarchiliksiz saqlanishi mumkin edi.