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EFEKTIVITAS KOMPOSIT HIDROKSI LAPIS GANDA-EKSTRAK BUAH MUNTINGIA CALABURA TERHADAP FOTODEGRADASI OKSITETRASIKLIN

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Layered Double Hydroxide (LDH) is a layered material with a large surface area and good anion-exchange capacity, but its stability remains limited. To enhance its performance, LDH was modified with Muntingia calabura (MC) extract, which is rich in flavonoids and phenolics with strong antioxidant activity (IC₅₀ < 50 μg/mL). CaAl, CaCr, and CaFe LDH–MC composites were synthesized via the coprecipitation method and characterized using XRD, FT-IR, SEM-EDS, and UV- DRS. XRD exhibited the typical LDH peaks ((003), (006), (110)) with a shift at 2θ = 20.14°, confirming successful intercalation of MC. FT-IR revealed –OH, C=C, NO₃⁻, and M–O groups along with new bands from MC, SEM showed more uniform particle morphology, while UV-DRS indicated a reduced band gap, enhancing light absorption. Photodegradation of oxytetracycline (OTC) was optimum at pH 7, catalyst mass of 30 mg, and irradiation time of 120 minutes, with a higher reaction rate constant for LDH–MC compared to pristine LDH. Radical scavenging studies confirmed the role of ●OH, ●O₂⁻, h⁺, and e⁻ in the degradation mechanism. Variations in OTC concentration and temperature also supported improved performance of the composites. Regeneration tests showed that CaCr LDH–MC retained 33.31% efficiency up to the 5th cycle, higher than CaAl LDH– MC (25.78%) and CaFe LDH–MC (5.73%), while pristine LDH exhibited a more significant decline. Thus, LDH–MC composites demonstrated higher photocatalytic activity, better stability, and reusability, highlighting their potential as environmentally friendly photocatalysts for antibiotic wastewater treatment.

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Detail Information

Series Title

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Call Number

T1910032026

Publisher

Indralaya : Prodi Magister Ilmu Material, Sekolah Pascasarjana Universitas Sriwijaya., 2025

Collation

xiii, 57 hlm.; ilus.; tab.; 29 cm.

Language

Indonesia

ISBN/ISSN

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Classification

615.321 07

Content Type

Text

Media Type

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Carrier Type

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Edition

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Subject(s)

Prodi Magister Ilmu Material
Oksitetrasiklin — Stabilitas obat

Specific Detail Info

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Statement of Responsibility

TUTI

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