Pengaruh Temperatur Kalsinasi Terhadap Struktur Pori Silika Mesopori Dan Performanya Dalam Adsorpsi Methylene Blue

Shefira, Anindiya Syalwa (2025) Pengaruh Temperatur Kalsinasi Terhadap Struktur Pori Silika Mesopori Dan Performanya Dalam Adsorpsi Methylene Blue. Other thesis, Institute Technology Sepuluh Nopember.

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Abstract

Silika mesopori merupakan material berpori dengan ukuran pori 2–50 nm yang memiliki potensi tinggi sebagai adsorben untuk mengatasi pencemaran zat warna sintetis seperti MB. Penelitian ini bertujuan untuk menganalisis pengaruh variasi suhu kalsinasi terhadap sifat pori dan performa adsorpsi silika mesopori yang disintesis menggunakan metode sol-gel berbasis CTAB sebagai templat dan pasir silika mineral lokal sebagai sumber silika alam. Proses sintesis dilakukan melalui pelindian asam, pembentukan gel, pengeringan, dan kalsinasi pada suhu 200°C, 600°C, dan 800°C. Karakterisasi dilakukan menggunakan DTA-TGA, XRD, SEM, BET, dan spektrofotometri UV-Vis. Hasil menunjukkan bahwa SK-600 menghasilkan struktur pori paling optimal dengan luas permukaan 99,95 m²/g dan volume pori 0,345 cm³/g. Sampel ini juga menunjukkan efisiensi adsorpsi MB tertinggi sebesar 93,81% dan kapasitas adsorpsi 9,381 mg/g. Sementara itu, SK-200 menunjukkan struktur pori yang belum berkembang sempurna, dan SK-800 mengalami penurunan performa akibat kristalisasi berlebih. Proses penurunan warna MB yang terjadi merupakan hasil dari adsorpsi fisik yang dibuktikan oleh tidak adanya perubahan struktur kimia MB dan munculnya endapan berwarna setelah proses adsorpsi. Dengan demikian, suhu kalsinasi 600°C merupakan kondisi optimum untuk menghasilkan silika mesopori dengan struktur dan performa adsorpsi terbaik.
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Mesoporous silica is a porous material with a pore size of 2-50 nm that has high potential as an adsorbent to overcome pollution of synthetic dyes such as MB. This study aims to analyze the effect of calcination temperature variation on the pore properties and adsorption performance of mesoporous silica synthesized using sol-gel method based on CTAB as template and local mineral silica sand as natural silica source. The synthesis process was carried out through acid leaching, gel formation, drying, and calcination at 200°C, 600°C, and 800°C. Characterization was carried out using DTA-TGA, XRD, SEM, BET, and UV-Vis spectrophotometry. The results showed that SK-600 produced the most optimized pore structure with a surface area of 99.95 m²/g and a pore volume of 0.345 cm³/g. This sample also showed the highest MB adsorption efficiency of 93.81% and adsorption capacity of 9.381 mg/g. Meanwhile, SK-200 showed an incompletely developed pore structure, and SK-800 experienced a decline in performance due to over-crystallization. The MB discoloration process that occurred was the result of physical adsorption as evidenced by the absence of changes in the MB chemical structure and the appearance of colored precipitates after the adsorption process. Thus, a calcination temperature of 600°C is the optimum condition to produce mesoporous silica with the best structure and adsorption performance.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Adsorpsi, Kalsinasi, Silika Mesopori; Adsorption, Calcination, Silica Mesoporous
Subjects:	Q Science > QC Physics > QC162 Adsorption and absorption Q Science > QC Physics > QC585.75.S55 Silica Q Science > QC Physics > QC 611.97.T46 Temperature effects. Including transition temperature
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Anindiya Syalwa Shefira
Date Deposited:	25 Jul 2025 06:37
Last Modified:	25 Jul 2025 06:37
URI:	http://repository.its.ac.id/id/eprint/121501

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