The Japan Industrial Technology Research Institute has newly developed a technology that can synthesize raw materials such as nylon KA oil (cyclohexanone + cyclohexanol) with a high selectivity of about 99% at room temperature and pressure through semiconductor photoelectrodes. The technology developed this time uses solar energy and weak electrical energy to synthesize high-value-added chemical materials.
The semiconductor photoelectrode is an electrode that connects a wire to a plate-shaped and film-shaped semiconductor, and performs an oxidation-reduction reaction under light. The researchers put the fabricated semiconductor photoelectrode and counter electrode into a single-chamber type reaction vessel. Using the reaction solution containing cyclohexane and nitric acid, the photoelectrode was irradiated with simulated sunlight under the oxygen state to generate KA oil. A weak reaction can occur only by irradiating simulated sunlight, and after applying an external voltage, the generation speed can be increased by about 6 times. In addition, the tungsten oxide semiconductor photoelectrode they produced is in a stable state, and there will be no degradation problems when reused.
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