Nanocomposite　titania/tetratitanate　particles　were　prepared　by　utilizing　the　electrostatic　interaction　of　the　colloidal　tetratitanate　nanosheets　and　TiO2　powders　through　dispersing　TiO2　into　tetratitanate　solution　at　pH4.　The　samples　were　characterized　by　X-ray　powder　diffraction,　transmission　electron　microscopy,　chemical　analysis,　and　photocatalytic　activity　measurement.　The　crystallites　of　Ti4O92-　in　the　form　of　tetratitanate　nanosheets　have　lateral　size　around　100　nm.　The　visible　light　responsive　photocatalytic　activity　of　rutile　nanoparticles　could　be　improved　by　forming　nanocomposite　with　layered　tetratitanate.　The　high　specific　surface　area　of　this　kind　of　composite　and　a　certain　amount　of　mesopores　in　nanocomposite　powder　could　be　responsible　for　better　performance　in　the　NO　elimination.　©　2009　Elsevier　Masson　SAS.　All　rights　reserved.