Birawidha, D.C., Manaf, A., Astuti, W., Daulay, A., Haryono, T., Sari, Y. and Suprihatin, S. 2025. ECO FRIENDLY CITRIC ACID-ASSISTED SOL-GEL SYNTHESIS OF HIGH-PURITY NANO SILICA FROM DIENG GEOTHERMAL SLAG: CHARACTERIZATION AND OPTIMIZATION METHOD. Indonesian Physical Review. 8, 2 (May 2025), 530–539. DOI:https://doi.org/10.29303/ipr.v8i2.486.