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- 저자 : Prabani, Prisnu Fadilah (검색결과 1 건)
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Wijaya, Karna,Pratika, Remi Ayu,Fitri, Edhita Rahmawati,Prabani, Prisnu Fadilah,Candrasasi, Yufinta,Saputri, Wahyu Dita,Mulijani, Sri,Patah, Aep,Wibowo, Arief Cahyo Materials Research Society of Korea 2022 한국재료학회지 Vol.32 No.3
Effect of sulfation processes on the physicochemical properties of ZrO<sub>2</sub> and TiO<sub>2</sub> nanoparticles were thoroughly investigated. SO<sub>4</sub>/ZrO<sub>2</sub> and SO<sub>4</sub>/TiO<sub>2</sub> catalysts were synthesized to identify the acidity character of each. The wet impregnation method of ZrO<sub>2</sub> and TiO<sub>2</sub> nanoparticles was employed using H2SO<sub>4</sub> with various concentrations of 0.5, 0.75, and 1 M, followed by calcination at 400, 500, and 600 ℃ to obtain optimum conditions of the catalyst synthesis process. The highest total acidity was found when using 1 M SO<sub>4</sub>/ZrO<sub>2</sub>-500 and 1 M SO<sub>4</sub>/TiO<sub>2</sub>-500 catalysts, with total acidity values of 2.642 and 6.920 mmol/g, respectively. Sulfation increases titania particles via agglomeration. In contrast, sulfation did not practically change the size of zirconia particles. The sulfation process causes color of both catalyst particles to brighten due to the presence of sulfate. There was a decrease in surface area and pore volume of catalysts after sulfation; the materials' mesoporous structural properties were confirmed. The 1 M SO<sub>4</sub>/ZrO<sub>2</sub> and 1 M SO<sub>4</sub>/TiO<sub>2</sub> catalysts calcined at 500 ℃ are the best candidate heterogeneous acid catalysts synthesized in thus work.
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