Method for producing photocatalyst and method for treating hydrogen sulfide using the photocatalyst

摘要

A method for preparing a high active photocatalyst for generating sulfur and hydrogen from hydrogen sulfide, which comprises subjecting a metal sulfide such as zinc sulfide to an oxidation treatment in an oxidizing atmosphere or with a specific oxidizing agent; and a method for treating hydrogen sulfide using the high active photocatalyst, which comprises a hydrogen sulfide dissolving step of dissolving a hydrogen sulfide gas in, for example, an aqueous sodium hydroxide solution in a hydrogen sulfide dissolution vessel (1) to form a sodium sulfide solution, a hydrogen recovering step of adding the high active photocatalyst to the sodium sulfide solution in a photocatalyst reaction vessel (3), forming a hydrogen gas and a polysulfide ion through the irradiation with an ultra-violet ray, and recovering a hydrogen gas, and a sulfur recovering step of recovering sulfur from the polysulfide ion in a sulfur recovering vessel (5) and re-circulating the solution after the recovery of sulfur to the hydrogen sulfide dissolution vessel (1) for reusing the solution in the hydrogen sulfide dissolving step.