This project explores the photocatalytic properties of titanium dioxide in degrading dye solutions. By measuring changes in absorbance, you can analyze the efficiency of dye degradation under UV light.
If a dye solution is exposed to titanium dioxide and UV light, then the dye will degrade more quickly compared to without exposure.
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Prepare a series of dye solutions in beakers, each containing the same concentration of dye.
Add a measured amount of titanium dioxide powder to each beaker.
Place the beakers under a UV light source and start the timer.
At regular intervals, take samples from each beaker and measure their absorbance using a spectrophotometer.
Record the absorbance readings at each time interval.
Plot the absorbance against time to visualize the degradation process.
Compare the degradation rates with and without titanium dioxide.
Analyze the results to determine the effectiveness of the photocatalytic process.
Clean all equipment and dispose of chemicals according to safety guidelines.
The absorbance of the dye solution will decrease over time, indicating degradation. Solutions with titanium dioxide will show a faster decrease compared to those without.
Presence of titanium dioxide
Rate of dye degradation
Concentration of dye, Intensity of UV light, Volume of solution, Temperature
Wear protective eyewear and gloves when handling chemicals and operating the UV light source.
Include graphs showing absorbance changes over time.
Explain the role of titanium dioxide as a photocatalyst.
Demonstrate how to use a spectrophotometer.
Discuss environmental applications of photocatalysis.
Photocatalysis is a process where light energy activates a catalyst, leading to chemical reactions such as degradation.
Titanium dioxide is a common photocatalyst due to its effectiveness and stability under UV light.
Yes, photocatalytic degradation is used in wastewater treatment to break down organic pollutants.
