Composite water purification apparatus and method thereof

A water purification method of using a composite water purification apparatus, comprising the following steps of:

• a) providing the composite water purification apparatus including a container, at least a sacrificial anode, at least a photocatalyst anode, a light source, and at least a cathode, wherein the photocatalyst anode includes a photocatalyst, the light source is electrically coupled to a power supply, and the sacrificial anode, the photocatalyst anode, and the cathode are immersed in the container;
• b) inputting a liquid including water and gas into the container, such that a photocatalytic reaction is conducted at the sacrificial anode, the sacrificial anode produces sacrificial ions in a lower oxidation state, and the cathode produces hydrogen peroxide (H2O2) by using the liquid and the gas;
• c) interacting sacrificial ions in a lower oxidation state with hydrogen peroxide to form sacrificial ions in a higher oxidation state, a strong oxidizing agent (.OH), and hydroxide ions (OH—), the strong oxidizing agent purifying the liquid;
• d) conducting a photocatalytic reaction, by the light source and the photocatalyst anode, such that the liquid produces another strong oxidizing agent (.OH);
• and
• e) outputting the purified liquid.