“…The fine TiO 2 powder, or crystals, can be dispersed in the water, in order to be clarified by irradiation; however, they must be removed by filtering after reaction, which is troublesome and costly. Thus, in order to solve this problem, many researchers have examined methods of fixing TiO 2 on other supporting materials, including glass beads [20][21][22], fiberglass [23][24][25], silica [26,27], an electrode [28], and zeolite [29,30]. Recently, some researchers have used zeolite as hosts to fix semiconductors, due to its unique, uniform pores and channel size.…”