Photocatalytic Activity of Acid-Catalyst-Modified Sol-Gel Processed Nanocrystalline Titania: On Dual-Role of Active Surface-Sites
Jose, M; Narayani, H; Kumar, J; Shukla, S
| HERO ID | 2841336 |
|---|---|
| In Press | No |
| Year | 2015 |
| Title | Photocatalytic Activity of Acid-Catalyst-Modified Sol-Gel Processed Nanocrystalline Titania: On Dual-Role of Active Surface-Sites |
| Authors | Jose, M; Narayani, H; Kumar, J; Shukla, S |
| Volume | 7 |
| Issue | 4 |
| Page Numbers | 729-745 |
| Abstract | Stabilizing anatase-phase in pure and doped nanocrystalline titania (TiO2) with enhanced photocatalytic activity has been a challenging task. In this report, we synthesize nanocrystalline anatase-TiO2 via the conventional and acid-catalyst-modified sol-gel processes. Three different types of acid-catalysts, HNO3, CH3COOH, and H3PO4, have been utilized for this purpose. The effect of acid-catalyst on the morphological, chemical, and structural evolution of samples has been analyzed using the different analytical techniques. The photocatalytic activity has been measured under the ultraviolet (UV)-radiation exposure by varying the acid-catalyst used, initial dye-concentration, and initial concentration of H3PO4. The maximum photocatalytic activity has been exhibited by the sample processed using the H3PO4 as an acid-catalyst which has been attributed to the ability of PO43- anions to bind strongly with the surface of anatase-TiO2 and their dual-role in the dark and under the UV-radiation exposure leading to the largest amount of dye-adsorption on the surface and highest dye-degradation kinetics. |
| Doi | 10.1166/sam.2015.1901 |
| Wosid | WOS:000349140800016 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal:SCIENCE OF ADVANCED MATERIALS 1947-2935 |
| Is Public | Yes |
| Keyword | Phosphate-Anions; Adsorption; Hydroxyl-Radical; Dye; Methylene Blue |