Photocatalysis process - An Alternative Energy Generation
The hydrogen produced from solar energy with greenhouse gases emitted by humans can be used in producing fuel. Dr. FUJISHIMA Akira, the director of the Photocatalysis International Research Centre at the University of Tokyo discovered photocatalysis reaction using titanium oxide. This effect is known as Honda-Fujishima effect, with research on artificial photosynthesis then being initiated around the world. He pioneered the discovery of that photocatalysis reaction, which involves the process of the principle of breaking down dirt without using any energy or incurring any cost. Though photocatalysis has been already widely developed and used practically in the areas of antifogging and antifouling to do research on artificial photosynthesis. A process that includes the extraction of hydrogen through photocatalysis. This also has significant attention in recent years as a technology with the potential to contribute to a decarbonized society.
Dr. Fujishima alongside his supervisor the late Dr. HONDA Kenichi discovered the reaction of photocatalysis in which this phenomenon produces hydrogen and oxygen when titanium oxide is exposed to light underwater in the effect of reproducing the redox (or oxidation-reduction) reaction that is similar like photosynthesis in plants. Ever the researchers all over the world started working on this to extract hydrogen via artificial photosynthesis using the principle-based on the Honda-Fujishima effect. The effect of photocatalysis acts as both antifogging and antifouling effects simply by the irradiation of light. It was used in the glass covering the pyramid-shaped entrance of the Louvre Museum. Researchers on artificial photosynthesis started gaining pace along with the United Nations Sustainable Development Goals (SDGs).
Some of the other key factors that have to be taken care and checked with is, whether we can find a catalyst that satisfies the remaining various conditions; this includes whether the materials used as catalysts can be easily obtained, whether a large surface area photocatalyst can be manufactured, and whether any harmful substances are contained in the material. The shift of fossil fuels with renewable energies like hydrogen, besides another important measure to achieving a decarbonized society is carbon recycling, effectively using CO2 as a resource.
· Hydrogen is extracted through water electrolysis using the electricity produced from highly efficient solar cells.
· Methanol is produced from hydrogen combined with CO2 emitted from power plants and factories which can be used as energy source.
· Thus greenhouse effect will no longer be contributed by CO2 or carbon gases, rather, those gases will be the resources to replace oil and natural gas.