J. Technology and Education, Vol.20, No.2, pp.97-101, 2013

研究ノート

 

皺構造を有する多孔質光触媒ガラス基材の作製

 

木幡　進^*，川口 寿奈

 

熊本高等専門学校　生物化学システム工学科

（〒866-8501　八代市平山新町 2627）

^*kohata@kumamoto-nct.ac.jp

 

Preparation of Porous Glass Substrates with Wrinkled Surface for Use as Photocatalyst Supports

 

Susumu KOHATA^* and Juna KAWAGUCHI

 

Department of Biological and Chemical Systems Engineering

Kumamoto National College of Technology, Hirayama-shinmachi 2627,

Yatsushiro-city, Kumamoto 866-8501, Japan

 

(Received November 6, 2013; Accepted December 4, 2013)

 

Abstract

Porous glass substrates for use as efficient photocatalyst supports were fabricated using recycled glass powder and a foaming agent. The substrates were given a wrinkled surface structure using the following procedure. First, a wrinkled clay template was used to form an impression in a plate made from a material composed mostly of alginate salts, which is often used to produce dental impressions. The alginate plate was subsequently placed at the bottom of a graphite formwork, which was then packed with a mixture of powdered glass and CaCO₃, and sintering was carried out at 775 °C to form a porous glass substrate with a wrinkled surface. To produce the final photocatalyst structure, a TiO₂ sol was spread over the substrate surface and further sintering was performed at 550 °C. The photocatalytic activity of the final structure was evaluated based on the photodegradation of methylene blue under ultraviolet exposure. The wrinkled porous surface was found to enhance the efficiency of the photocatalyst by increasing the contact area with the target.

Key words: Recycled glass, Wrinkled surface, Porous glass substrate, Sintering, Photocatalyst