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Photocatalytic Decomposition of Bisphenol A in Water Using Composite TiO2-Zeolite Sheets Prepared by a Papermaking Technique

“…3 × 10 5 ; charge density (CD), 5.5 mequiv g -1 ; Aldrich, Ltd.] and anionic polyacrylamide (A-PAM, HH-351; Mw, ca. 4 × 10 6 ; CD, 0.83 mequiv g -1 ; Kurita, Ltd.) were used as flocculants for hand-sheet-making using a dual polymer retention system (18)(19)(20)(21). The BPA and other chemicals were reagent grade (Wako Pure Chemical Industries, Ltd.) and were used without further purification.…”

“…In our previous studies, a powder zeolite used as an adsorbent, an ion exchanger, and a catalyst were successfully incorporated into an inorganic sheet by a paper manufacturing method with a dual polymer retention system that employed the sequential addition of cationic and anionic polymers as flocculants (18,19). The preparation conditions and the performance of the inorganic zeolite sheets were investigated for the sheet strength, uniformity, hygroscopicity, and adsorptivity of gaseous acetaldehyde (19,20). Furthermore, zeolite sheets containing anatase-type TiO2 particles showed a high efficiency for the removal of acetaldehyde gas, an indoor pollutant (21).…”

Metal oxide nanostructures incorporated/immobilized paper matrices and their applications: a review

“…64 No further developments were made in this research area until 2003 when Tanaka's group reported several articles on incorporation of TiO 2 nanoparticles in paper matrices and studied their photocatalytic activities. [95][96][97][98][99] They employed various retention aids, occulants, and binders such as polyacrylamide, ceramic bers, zeolites-Y, and polydiallyldimethylammonium chloride (PDADMAC) along with TiO 2 powder to understand effects on overall performance with paper matrices. In all of these reports, the paper matrices were also prepared by the standard handsheet-making procedure (Fig.…”

Activated Carbon Water Purification Filter Prepared by Wet Molding with a DualPolyelectrolyte Retention System

“…In this study, activated carbon fibers were fabricated into a paper-shaped composite, using a high-speed low-cost papermaking technique [8][9][10][11][12]. The DPR system, described in our previous reports [7,8], allowed the effective retention of activated carbon fibers (>95%). In addition, the physical strength of the paper composite improved remarkably by adding pulp fiber (10 wt% per total solids).…”

“…Paper-like inorganic powder/fiber composites prepared using wet papermaking with a dual polyelectrolyte retention (DPR) system, were reported in our previous study [7][8][9][10][11][12]. DPR system involves sequential addition of cationic and anionic polyelectrolytes [8], and has allowed the efficient immobilization of various fine materials, such as copper/ zinc oxide powders [8,9], platinum/aluminum oxide powders [10] and zinc oxide whiskers [11,12], onto inorganic paper matrices through electrostatic interaction.…”