▎ 摘　　要

NOVELTY - Preparing iron/nitrogen codoped-titanium dioxide nanotube reduced type graphene oxide composite catalyst comprises mixing titanium dioxide nanotubes and ferric nitrate nanohydrate solutions, drying and calcining to obtain iron-precipitated nanotubes, dispersing graphene oxide and urea in deionized water, dispersing the iron-precipitated nanotubes in deionized water, mixing the two solutions and concentrated nitric acid, introducing into reaction kettle, heating, reacting, cooling, transferring the product into the deionized water, washing and calcining under nitrogen. USE - The composite catalyst is useful in the photocatalytic degradation of organic contaminants (claimed). ADVANTAGE - The composite catalyst has high visible photosensitization degree. DETAILED DESCRIPTION - Preparing iron/nitrogen codoped-titanium dioxide nanotube reduced type graphene oxide composite catalyst comprises (i) mixing titanium dioxide nanotube and ferric nitrate nanohydrate solution, drying and calcining under nitrogen stream to obtain iron-precipitated nanotubes, (ii) dispersing graphene oxide and urea in deionized water and dispersing the iron-precipitated nanotubes prepared in step (i) in deionized water, mixing the two solutions and concentrated nitric acid, introducing into reaction kettle, heating, reacting, cooling naturally to room temperature, transferring the product in the reactor into the deionized water and washing to obtain iron/nitrogen codoped-titanium dioxide nanotube reduced type graphene oxide and (iii) calcining the above prepared composite catalyst under nitrogen stream to obtain the composite catalyst powder. An INDEPENDENT CLAIM is also included for the iron/nitrogen codoped-titanium dioxide nanotube reduced type graphene oxide catalyst prepared by the above method.