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4 results on '"Sari, Anggun Lila"'

2. Preparation of TiO2-coated glass and their application for photodecompose organic dye.

Author

Kartikowati, Christina Wahyu, Sari, Anggun Lila, Sari, Ajeng Arum, Muchlis, Susanti, Evi, Poerwadi, Bambang, Supriyon, Jenie, Siti Nurul Aisyiyah, Suhendi, Asep, Arif, Aditya Farhan, and Arutanti, Osi

Subjects
*ORGANIC dyes, *POWDERED glass, *COATING processes, *RHODAMINE B, *PHOTOCATALYSTS
Abstract

TiO2−coated glass has been successfully prepared for practical water treatment application under UV-light irradiation. This work demonstrated the immobilized TiO2 powder on glass support using the dip-and spray coating method. The number of coating processes was varied to studies their effect on photocatalytic efficiency. The annealed process at high temperature was conducted to improve the adhesion of TiO2 powder to the glass substrates. Surface observation of the coating TiO2 showed that the dip-coating method has a better result than the spray coating method. All the glass surfaces can be covered by TiO2 perfectly, and this process did not affect the photocatalytic activity. Almost 100% of 4 ppm Rhodamine B could be decomposed by immobilized TiO2. The current research is potentially used as a standard method to immobilize TiO2 on the glass substrate on a larger scale in the future. Accordingly, separating the process between TiO2 and liquid-based solution after the photocatalytic process is more straightforward. [ABSTRACT FROM AUTHOR]

Published
2022
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4. Design and Application of Homogeneous-structured TiO2/Activated Carbon Nanocomposite for Adsorption–Photocatalytic Degradation of MO.

Author

Arutanti, Osi, Sari, Anggun Lila, Kartikowati, Christina Wahyu, Sari, Ajeng Arum, and Arif, Aditya Farhan

Subjects
TRANSMISSION electron microscopes, NANOCOMPOSITE materials, ELECTRON traps, SCANNING electron microscopes, ACTIVATED carbon, SOL-gel processes
Abstract

The sol–gel method successfully prepared homogeneous-structured TiO2/activated carbon (TiO2/AC). This study highlights the effect of post-annealing temperature on the properties and photocatalytic activity of composite TiO2/AC to remove methyl orange (MO). The prepared photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Brunauer–Emmett–Teller measurement (BET), and thermogravimetric (TGA). The results confirmed that all prepared photocatalysts were TiO2 anatase. The removal of MO was obtained through a synergistic effect of adsorption and photocatalysis. TiO2/AC-400 was the optimum photocatalyst to decompose MO up to 80% after 90 min under simulated UV irradiation. The remaining 1% AC after the annealing process at 500 °C had proved to be capable of decomposing MO mainly due to its serving as an electron trap. The potential photocatalyst formation and photocatalysis mechanism for TiO2/AC nanocomposite to support phenomena were proposed. The finding in this study provided important implications for further research on the preparation of composite TiO2 and carbon-based co-catalyst to enhance the adsorption–photocatalytic activity. [ABSTRACT FROM AUTHOR]

Published
2022
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