Sintesis dan Karakterisasi Nanomaterial TiO2 Terdoping Ni melalui metode Hidrotermal Untuk Fotodegradasi Zat Warna Rhodamin B
Abstract
Rhodamin B (RhB) merupakan salah satu zat warna sintesis yang banyak digunakan dalam industri tekstil dan limbahnya berpotensi mencemari lingkungan perairan. Fotokatalisis menggunakan nanomaterial TiO2 merupakan metode yang sangat potensial untuk degradasi senyawa organik. Namun, aktivitas TiO2 terbatas karena energi celah pita yang relatif besar. Penelitian ini bertujuan untuk mensintesis dan mengkarakterisasi nanomaterial terdoping nikel (Ni-TiO2) serta uji aktivitasnya untuk fotodegradasi RhB. Nanomaterial Ni-TiO2 disintesis menggunakan metode hidrotermal dan dikarakterisasi menggunakan X-ray diffraction (XRD), diffuse reflectance ultraviolet-visible (DRUV-Vis), dan Fourier transform infrared spectroscopy (FTIR). Uji aktivitas dilakukan melalui fotodegradasi RhB dengan variasi waktu penyinaran dan massa fotokatalis. Hasil karakterisasi XRD menunjukkan terbentuknya fase kristal anatase TiO2 dan titanate nanotubes, sedangkan analisis DRUV-Vis menunjukkan penurunan energi celah pita TiO2 sebesar 3,36 eV menjadi 3,22 eV setelah didoping Ni. Spektrum FTIR menunjukkan keberadaan ikatan Ti-O/Ti-O-Ti serta perubahan pita serapan akibat doping logam Ni. Kondisi optimum fotodegradasi RhB diperoleh pada waktu 90 menit dan massa fotokatalis 20 mg dengan efisiensi fotodegradasi sebesar 79,30%.
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References
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DOI: https://doi.org/10.37905/jambchem.v8i2.41568
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