Ilalang (Imperata cylindrica L) merupakan tumbuhan liar yang jarang dimanfaatkan. Daun ilalang mengandung senyawa bioaktif seperti alkaloid dan flavonoid. Senyawa flavonoid dapat digunakan sebagai zat reduktor alami dalam sintesis nanopartikel perak (AgNPs). Tujuan pada penelitian ini adalah sintesis nanopartikel perak menggunakan bioreduktor alami dari ekstrak daun ilalang. Sintesis nanopartikel perak menggunakan metode green synthesis (reduktor alam). Terbentuknya koloid nanopartikel perak terlihat secara visual ditandai dengan perubahan warna koloid menjadi coklat setelah penambahan ekstrak daun ilalang. Hasil UV-Vis menunjukkan nanopartikel perak memiliki puncak serapan pada panjang gelombang 420 nm dengan nilai absorbansi 1,9. FTIR memperlihatkan spektrum pengurangan puncak serapan nanopartikel perak pada bilangan gelombang 3356 cm-1. Hasil XRD dan PSA menunjukkan nanopartikel perak memiliki rata-rata ukuran kristal 19 nm dan distribusi ukuran partikel sebesar 1160 nm. Nanopartikel perak memiliki bentuk bulat dengan ukuran partikel 20 nm yang terlihat pada morfologi hasil TEM

Activated carbon coated with magnetite (ACA-Fe3O4) was synthesized in this study. Activated carbon was synthesized using an Elaeis Guineensis Jacq (EGJ) as a raw material followed by physical and chemical activation. Physical activation is carried out by heating at a temperature of 700°C and followed by a reaction with H3PO4 solution as chemical activation. Furthermore, the activated carbon was reacted with a mixture of FeCl3 and FeSO4 solution then followed by the addition of NaOH solution up to a pH of 10. Characterization with X-Ray Diffraction (XRD) and Scanning Electron Microscopy - Energy Dispersive X-Ray (SEM-EDX) on ACA-Fe3O4 was done to confirm that magnetite has succeeded to coating on ACA. Brunauer-Emmett-Teller Surface Area Method (SBET) confirmed that pore volume and average pore diameter increase with the presence of magnetite. Optimum conditions for Ni(II) ion adsorption with ACA-Fe3O4 was under conditions of 0.5 grams adsorbent, 25 mL of Ni(II) ion solution 100 ppm, and contact time of 1 hour with the acquisition of 99.11%. Adsorption process more suitable with pseudo-second-order and Langmuir adsorption isotherm pattern. Desorption of Ni(II) ion of 70.84% using HCl.

Hand sanitizers, handsoaps, and disinfectants (H2D) have become necessities in a new normal during the Covid-19 pandemic. These three items are necessary to use in daily activities to prevent the spread of Covid-19. One of the efforts to successfully adopt a new normal is to educate the youth on preventing the spread of Covid-19. Workshop and education on making simple H2D at SMK Negeri 3 Kotabumi have been held through outreach activities and hands-on practice. The goal of this activity is to increase the students knowledge of SMK Negeri 3 Kotabumi in living a new lifestyle to prevent the spread of Covid-19 in North Lampung Regency. The result of this educational program is an increase in the knowledge of students of SMK Negeri 3 Kotabumi about H2D in terms of composition, making, and use. Besides, through the workshop program, students of SMK Negeri 3 Kotabumi also acquire skills in making simple H2D. Through presentation and direct practice, students of SMK Negeri 3 Kotabumi have been educated to become new lifestyle agents to prevent the spread of Covid-19 in North Lampung Regency.

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