Electrostatic precipitator

An electrostatic precipitator comprising:

• a discharge unit including ground electrodes and discharge electrodes;
• a collecting unit including collecting electrodes and positive electrodes;
• a voltage generating unit;
• and
• a photocatalyst, wherein the photocatalyst is contained within at least one of the discharge unit and the collecting unit, and wherein the voltage generating unit is configured to apply a voltage to the discharge unit that causes emission of a photo-energy which activates the photo-catalyst.

An electrostatic precipitator, comprising:

• discharge means for emitting an electrical discharge that charges particles contained in an air flow;
• collecting means for collecting the charged particles in the air flow;
• and
• a photo-catalyst, wherein the discharge means causes emission of a photo-energy that activates the photo-catalyst.