METHOD FOR MANUFACTURING METAL ION-CONTAINING SILICATE COATED PHOTOCATALYST COMPOSITE COMPOSITION

To provide a method for manufacturing a metal ion-containing silicate coated photocatalyst composite composition capable of blending as a component of food, fertilizer, cosmetic or quasi drug or a component to a coating agent, by heightening a photocatalytic effect by utilizing a simple method and a less expensive material, without using an existing higher technology or an expensive material.SOLUTION: A method for manufacturing a metal ion-containing silicate coated photocatalyst composite composition characterized in that by alternately contacting a calcium solution (hereinafter simply referred to as "calcium solution") that does not contain a silicate ion but contains a calcium ion, and a silicic acid solution that does not contain a calcium ion but contains a silicate compound, or a silicic acid ion to a substrate having a photocatalyst function to coat the substrate having the photocatalyst function with porous calcium silicate.SELECTED DRAWING: Figure 1 【課題】本発明は、既存の高度な技術や高価な材料を用いず、より簡易な方法、かつ安価な材料を活用して光触媒効果を高め、食品、飼料、肥料、化粧品または医薬部外品の成分あるいはコーティング剤の成分として配合可能である金属イオン配合ケイ酸塩被覆光触媒性複合組成物の製造方法に関する。【解決手段】光触媒機能を有する基材に、ケイ酸イオンを含まず、カルシウムイオンを含むカルシウム溶液（以下、単に「カルシウム溶液」という。）と、カルシウムイオンを含まずケイ酸化合物、またはケイ酸イオンを含むケイ酸溶液を交互に接触させることにより、光触媒機能を有する基材を多孔性ケイ酸カルシウムで被覆することを特徴とする金属イオン配合ケイ酸塩被覆光触媒性複合組成物の製造方法。【選択図】図１