▎ 摘　　要

NOVELTY - Graphene titanate nanocomposite visible-light-induced photocatalyst (I), is new, where: the nanocomposite photocatalyst is compounded by graphene and titanate, the titanate is strontium titanate, barium titanate or calcium titanate; the strontium titanate is globular; a surface of barium titanate is smooth and has holes; the calcium titanate is square nano hollow pipe; and the photocatalyst has strong absorption in the visible region whose wavelength is 400-800 nm; and the absorbance in the visible region having wavelength of 400-800 nm is 0.2-0.33, when the titanate is strontium titanate; USE - The graphene/titanate nano-composite visible-light-induced photocatalyst is useful for degradation of rhodamine B under the visible light stimulation (claimed). ADVANTAGE - (I) has desirable shape and improved catalytic performance, and allows simple degradation of the rhodamine B at a rate of 68%, 75% or 80%. DETAILED DESCRIPTION - Graphene titanate nano-composite visible-light-induced photocatalyst (I), is new, where: the nano-composite photocatalyst is compounded by graphene and titanate, the titanate is strontium titanate, barium titanate or calcium titanate; the strontium titanate is globular; a surface of barium titanate is smooth and has holes; the calcium titanate is square nano hollow pipe; and the nano-composite photocatalyst has strong absorption in the visible region whose wavelength is 400-800 nm; the absorbance in the visible region having wavelength of 400-800 nm is 0.2-0.33, when the titanate is strontium titanate; the absorbance of the visible region having wavelength of 400-800 nm is 0.28-0.43, when the titanate is barium titanate; the absorbance of the visible region having a wavelength of 400-800 nm is 0.34-0.78, when the titanate is calcium titanate. An INDEPENDENT CLAIM is included for the preparation of (I).