Provided is a method for decomposing at least one of organic compound contained in an aqueous solution by using a titanium dioxide photocatalyst that is excellent in both photocatalytic activity and solid-liquid separation performance for water treatment. The novel amide compound of the present invention is represented by General Formula :wherein R is a \u2014CH or a \u2014CO group, R1 is a hydrogen atom or a hydroxyl group, and R2 is a C1-12 alkyl group. A gate dielectric layer is formed on the top surface of the semiconductor body and on the sidewalls of the semiconductor body. Examples of patterning methods include laser thermal transfer or thermal head transfer. The second rotation member has an inner surface facing the first rotation member, and the second rotation member includes a plurality of recessed hollows formed in the inner surface.