The Efficiency Of Photocatalysis Is Affected By Various Elements Such As The Kind And Concentration Of Pollutants The Catalysts Surface Area And The Intensity Of Light The Catalyst Must Possess A Sufficiently High Surface Area To Efficiently Engage With The Contaminants And Absorb Light Furthermore The Process May Encounter Obstacles Such As Catalyst Deactivation Over Time Resulting From The Accumulation Of Particles Or The Adsorption Of Organic Molecules That Obstruct Active Sites