Evaluation of photodegradation performance by paper microzones

Area of Science:

• Environmental Chemistry
• Materials Science
• Green Chemistry

Background:

• Traditional catalyst performance evaluation relies on expensive instrumentation, hindering sustainable research.
• There is a critical need for cost-effective, environmentally friendly methods to study photocatalytic processes.

Purpose of the Study:

• To verify the reliability of the paper microzones method (PMZs) for evaluating photocatalyst performance.
• To establish optimal P25 Titanium Dioxide (TiO2) dosages for degrading various wastewater contaminants using PMZs.

Main Methods:

• Evaluated P25 TiO2 degradation performance across different wastewaters using the paper microzones method (PMZs).
• Determined optimal P25 TiO2 dosages for methylene blue (MB) and fuchsin basic (FB) degradation.
• Compared PMZs photocatalytic reaction kinetics with spectrophotometry for Fe(III)-SA degradation.

Main Results:

• Optimized P25 TiO2 dosages: 1 g/L for MB (6 min UV) and 0.5 g/L for FB (5 min UV) determined by PMZs.
• PMZs showed high reliability for photocatalytic reaction kinetics (R²=0.904) compared to spectrophotometry (R²=0.801) for Fe(III)-SA.
• PMZs accuracy ranged from 68.80% to 87.54% relative to spectrophotometry across various contaminants.

Conclusions:

• The paper microzones method (PMZs) is a reliable, green, and sustainable alternative for catalyst performance evaluation.
• PMZs aligns with low-carbon environmental protection and green chemistry principles.
• The PMZs method demonstrates broad application prospects for future photocatalytic research.