Nano-Silica Synthesis from Rice Husk Waste and Its Use as a Paper Sheet Anti-Aging Coating with Density Functional Theory (DFT) Insights
: Paper ages naturally by heat, oxidation, and hydrolysis, which cause a progressive loss of mechanical strength. This study achieved a high yield of 93% amorphous SiO 2 from rice husk waste through controlled calcination at 450 ○ C (3 h) and 800 ○ C (2 h), alkaline extraction with 2.5 N NaOH, acid precipitation with 1...