Photodegradation of Methylene Blue by TiO₂
C16H18ClN3S + TiO2 + hν → CO2 + H2O + degradation products
Aperçu
TiO₂ photocatalysis generates hydroxyl radicals and superoxide ions that mineralize organic pollutants like methylene blue into CO₂, water, and simple inorganic ions. Methylene blue serves as a standard test dye for evaluating photocatalyst performance because its degradation is easily tracked by its visible blue color fading.
Participants
| Rôle | Substance | Coefficient | État |
|---|---|---|---|
| Produit | Carbon Dioxide CO₂ | 1 | (g) |
| Produit | Water H₂O | 1 | (l) |
Exemple du quotidien
Self-cleaning building facades use TiO₂ coatings that photocatalytically break down soot, smog deposits, and organic stains in sunlight.
Importance industrielle
TiO₂ photocatalysis is used in water purification, air treatment, self-cleaning surfaces, and anti-bacterial coatings.
Propriétés
- Type
- Photochemical
- Réversible
- Non
- Énergie
- Exothermique
- Catalyseur
- TiO₂ (titanium dioxide)
Réactions associées
Cis-Trans Isomerization of Retinal
Silver Chloride Photodecomposition
Luminol Chemiluminescence
Firefly Bioluminescence (Luciferin Oxidation)
Photolysis of Water (Vacuum UV)
Photochemical Smog Formation (NO₂ Photolysis)
Photodissociation of Chlorine Gas
Silver Bromide Photodecomposition
Photosynthesis
Chlorophyll Fluorescence
Frequently Asked Questions
What is the equation for Photodegradation of Methylene Blue by TiO₂?
The balanced equation is: C₁₆H₁₈ClN₃S + TiO₂ + hν → CO₂ + H₂O + degradation products.
What type of reaction is Photodegradation of Methylene Blue by TiO₂?
Photodegradation of Methylene Blue by TiO₂ is a photochemical reaction.
Is Photodegradation of Methylene Blue by TiO₂ exothermic or endothermic?
Photodegradation of Methylene Blue by TiO₂ is exothermic (releases energy).
What conditions are needed for Photodegradation of Methylene Blue by TiO₂?
This reaction requires a catalyst (TiO₂ (titanium dioxide)).