Method of quickly decomposing and removing an organic chlorine compound by a hollandite-type photocatalyst

摘要

A method of quickly decomposing and removing an organic chlorine compound, which comprises coating a liquid containing an organic chlorine compound on the surface of a photocatalyst so that the liquid does not flow, said photocatalyst comprising a hollandite-type crystal phase represented by the formula:; $PTEXTPDATA/PDATHILSBPDATx/PDAT/SB/HILPDATM/PDATHILSBPDATy/PDAT/SB/HILPDATN/PDATHILSBPDAT8-y/PDAT/SB/HILPDATO/PDATHILSBPDAT16\; /PDAT/SB/HIL/PTEXT$ ;(wherein A is at least one element selected from the group consisting of K, Rb, Cs, Ca, Ba and Na, M is a bivalent or trivalent metal element, N is an element which forms a rutile-type oxide, such as Ti, Sn or Mn, provided that A may be a Na element, only when M is Cr, and x and y satisfy 0.7x≦2.0 and 0.7y≦2.0, respectively), followed by irradiation with light in air so that the organic chlorine compound undergoes quick and complete oxidative destruction.