Use of semi-conducting bismuth sulfide as a photocatalyst for degradation of rose bengal
| Autor: | Suresh C. Ameta, R. K. Malkani, Rakshit Ameta, Shweta Sharma |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
hydroxyl radical
photocatalyst General Chemical Engineering Inorganic chemistry lcsh:TP155-156 General Chemistry semiconductor Reaction rate rose bengal lcsh:Biochemistry Light intensity chemistry.chemical_compound Reaction rate constant chemistry Photocatalysis Rose bengal Degradation (geology) Hydroxyl radical lcsh:QD415-436 bismuth sulphide Dyeing lcsh:Chemical engineering |
| Zdroj: | Macedonian Journal of Chemistry and Chemical Engineering, Vol 30, Iss 2, Pp 229-234 (2011) |
| ISSN: | 1857-5625 1857-5552 |
| Popis: | Different methods have been adopted for the removal and degradation of dyes from effluents of textile, dyeing and printing industries. These methods have their own merits and drawbacks. In the present investigation, bismuth sulfide has been used as a photocatalyst for the degradation of rose Bengal. The effect of different parameters like the pH, concentration of dye solution, amount of semiconductor and light intensity on the rate of reaction has been investigated. The reaction follows pseudo-first order kinetics. The optimum conditions were obtained as: [rose Bengal] = 1.60·10–5 M; Bi2S3 = 0.10 g; pH = 8.5, and light intensity = 50.0 mW·cm–2. The rate constant was 4.68·10–5 sec–1. A mechanism has been proposed for the degradation of rose Bengal involving hydroxyl radicals. |
| Databáze: | OpenAIRE |
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