A novel Ag3AsO4 photocatalyst has been prepared via a facile precipitation method. It exhibited higher activity than Ag3PO4 or AgI in degradation of rhodamine B or methyl orange. The excellent activity of Ag3AsO4 is attributed to its more separated photogenerated carriers and high absorption capacity of visible light.

. -Semiconducting AgIO 4 is precipitated from an aqueous KIO4 solution by addition of AgNO3. It exhibits much higher activity than Ag3PO4 or Ag3AsO4 in photodegradation of rhodamine B under visible light irradiation. Band structure calculations reveal that the ultrahigh activity of AgIO 4 is attributed to the photosensitization mechanism of the photodegradation process. The semiconductor photocatalyst is discussed as a promising material for decomposition of organic pollutants, photosensitization-based utilization of solar energy, and as a photooxidizer in O 2 evolution from H2O. -(TANG*, J.; LI, D.; FENG, Z.; TAN, Z.; OU, B.; RSC Adv. 4 (2014) 5, 2151-2154,

The title compound is precipitated at room temperature by slowly combining an aqueous AgNO3 solution with an aqueous solution containing Na2HAsO3, H2O2, and NH4OH.

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Semiconducting AgIO4 is precipitated from an aqueous KIO4 solution by addition of AgNO3.