| Autor: |
Mandavgane, Susmita A., Rayulu, Sadhana, Chilkalwar, Anushree A., Anjankar, Swapna M., Moinuddin, Afsha Anjum, Arfin, Tanvir, Mandavgane, Akshat A. |
| Předmět: |
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| Zdroj: |
Rasayan Journal of Chemistry; Oct-Dec2023, Vol. 16 Issue 4, p2239-2248, 10p |
| Abstrakt: |
Titania-supported Au-Pt nanoparticles have been prepared by the photo-deposition method employing platinum and gold particles on the titanium dioxide surface. The properties of the developed photocatalysts were characterized by two methods, such as UV-visible diffuse spectrophotometry (UV-Vis) and transmission electron microscopy (TEM). When loaded with gold and platinum particles, titanium dioxide's (TiO2) photocatalytic activity significantly improved. This beneficial effect was attributed to an augmentation in the segregation of the electron-hole charge carriers generated by the photons. The kinetic and thermodynamic parameters were carried out, and they followed the Langmuir-Hinshelwood (L-H) mechanism. The amount of photo-induced hydrogen fabrication was studied, which depended on the sacrificial agent's concentration. It was found that the constant rate tends to increase as the concentration of ethanol increases. At 100 percent ethanol, there is a departure from the trend due to a change in the reaction mechanism. It was also observed that the rate increased with temperature. The different thermodynamic parameters like enthalpy of activation (H#), activation energy (Ea), entropy of activation (S#), and Gibb's free energy of activation (G#) were estimated for the reaction. Net energy recovery (NER) is a critical criterion for assessing the viability of conducting a photocatalytic process. Additionally, the current investigation revealed that the system containing 80% ethanol exhibited the greatest NER value. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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