The effect of hydrothermal conditions on photoluminescence properties of rice husk-derived silica-carbon quantum dots for methylene blue degradation

摘要: Carbon quantum dots (CQDs) have potential to replace metal-based due its low-toxicity. However, studies on CQDs preparation were dominated by synthetic carbon precursors. Switching the precursors into natural ingredient is preferred since they are highly abundant and low-cost. In this study, composite of silica-carbon (Si-CQDs) fabricated from rice husk through a hydrothermal process. Si-CQDs with diverse properties beneficial for application in future; therefore, variation conditions (i.e., temperature pH) was performed investigate their influence properties. Investigation using HRTEM, XPS, Raman spectroscopy, UV-Vis spectroscopy suggested that affect carbonization reaction. Hydrothermal controls rate ash, while acid addition accelerates polymerization base tends cut more carbons small particles. The photoluminescence (PL) analysis showed obtained Si-CQD samples emission range 469–552 nm various intensities. sole evaluated methylene blue (MB) degradation under visible light irradiation.