Optimizing the Synthesis of Silver Nanoparticles Using Five Curcuma Species under UV Irradiation as a Potent Suncreen Substrate

Curcuma rhizome is reported to have a high total phenolics that could act as reducing agents for metals nanoparticles. Rhizomes of five curcuma species were selected bioreductors, namely white turmeric (Curcuma zedoaria), black (C. aeruginosa), fingerroot rotunda), temu giring heyneana), and mango ginger amada). The research was designed select the reductor from rhizomes mentioned above silver nanoparticles synthesis, optimizing synthesis condition, evaluating its potential sunscreen agent. Silver (AgNPs) synthesized by mixing extracts with AgNO3 irradiating thesolution under 366 nm UV lamp at certain times pHs. Based on spectra, highest absorbance detected kunci extract. optimum conditions nanoparticle-temu (AgNPs-TK) determined using Box-Behnken Design Minitab. Statistical results showed 0.13 g nitrate irradiated 162.7 min pH 11.34 condition AgNPs synthesis. characterized PSA/DLS, XRD, TEM. TEM analysis confirmed particles are spherical. size produced based 5–50 nm. Sunlight inhibitionactivity, spectrophotometrically, indicated sun protection factor AgNPs-TK categorized minimum in concentration 25 ppm. &nbsp