An ozone generator and an ozone generating method, where the ozone generator includes a dielectric substrate, a first electrode disposed on a first surface of the dielectric substrate, and a second electrode disposed on the dielectric substrate and corresponding to the first electrode. The first electrode comprises a plurality of first finger portions and a plurality of superficial structures integrally formed on the plurality of first finger portions.

Surface-oxygenated biochar compositions and sonication-ozonization methods create advanced hydrophilic biochar materials having higher cation exchange capacity, optimized pH, improved wettability, and toxin free components. These sonicated and ozonized biochar compositions are used as filtration materials for clean water and air, as phosphorus solubilizing reagents to mix with phosphate rock materials to make a slow-releasing phosphate fertilizer, as biochar soil additives to help solubilize phosphorus and reduce phosphorus fertilizer additions required to achieve desired soil phosphorus activity, crop uptake, and yield goals, as sand soilization reagents by utilizing their liquid gel-forming activity in the spaces among sand particles to retain water and nutrients and hold the sand particles together, as plant growth stimulants by using the humic acids-like surface-oxygenated biochar substances at a proper ppm concentration and as carbon sequestration agents to help control climate change for energy and environmental sustainability on Earth.

An ozone generator and an ozone generating method, where the ozone generator includes a dielectric substrate, a first electrode disposed on a first surface of the dielectric substrate, and a second electrode disposed on the dielectric substrate and corresponding to the first electrode. The first electrode comprises a plurality of first finger portions and a plurality of superficial structures integrally formed on the plurality of first finger portions.