| abstract |
A highly active photocatalytic fiber and a method for producing the same are provided. A silica-based composite oxide fiber comprising a composite oxide phase of an oxide phase (first phase) mainly composed of a silica component and a metal oxide phase (second phase) comprising a metal other than silica, wherein the metal The abundance ratio of at least one or more metal elements of the metal oxide constituting the oxide phase (second phase) increases in a gradient toward the fiber surface, and the metal oxide phase (second phase) is: Metals constituting it are formed in the form of particles, and mesopores having an average pore diameter of 2 to 30 nm from the fiber surface to the inside of the fiber are formed between the particles, and the average particle diameter is 0.5 to 10 nm in the mesopores. It is a photocatalyst fiber characterized by carrying platinum (Pt) particles. |