Immobilization of PDMS-SiO2-TiO2 composite for the photocatalytic degradation of dye AO-7

Abstract

Crack-free PDMS-SiO-TiO composite as photocatalyst was prepared for degrading dyes by using thin-film fixed bed reactor. The hydrophobic surface of the photocatalyst loaded with PDMS-SiO-TiO composite could be considered as an extractant for organic pollutants. The effect of different supports including pumice stone, medicinal stone, and fiberglass for photocatalytic efficiency were compared. Under the same condition, it was found that the photocatalytic degradation effect of dyes was best when PDMS-SiO-TiO composite was fixed on pumice stone rather than medicinal stone or fiberglass. Furthermore, when pumice stone was used as the support for PDMS-SiO-TiO composite, the photocatalytic degradation effect of dyes hardly decreased after five cycles.

Fabrication of Silicon Carbide from Recycled Silicon Wafer Cutting Sludge and Its Purification

“…The Si sludge shows peaks at 618 cm −1 ,1065 cm −1 , 800 cm −1 , 1134 cm −1 , 1225 cm −1 , and 2124 cm −1 , which belong to Si-O-Si, Si-O, Si-O-C, Si-Si, and C≡C bonds, respectively. This analysis showed similarities with other analyses indicating that the Si sludge contains a little amount of C and O. SiC synthesized at the optimum condition showed peaks at 760 cm −1 , 1047 cm −1 , and 2110 cm −1 , corresponding to Si-O, Si-O-C, and C≡C bonds [29][30][31][32][33]. Both Si sludge and synthesized SiC contain carbon in the samples with trace amounts of oxide.…”

Optimizing Hydrophobicity and Photocatalytic Activity of PDMS-Coated Titanium Dioxide

“…8,9 Specific wetting property of the catalyst surface is also designed to enhance the compatibility of the catalyst to solvent. 10−13…”

Facile Combined Experimental and Computational Study: g-C3N4@PDMS-Assisted Knoevenagel Condensation Reaction under Phase Transfer Conditions

“…39 The PDMS−SiO 2 −TiO 2 composite as photocatalyst was prepared for degrading dyes by using a thinfilm fixed-bed reactor. 40 In the literature, theoretical studies of Knoevenagel condensations have been quite limited for clear insights into the reaction. 41 In a remarkable work, Frapper et al have reported a theoretical study of a Knoevenagel condensation reaction catalyzed by water and advocated the high free-energy barrier.…”

“…This could be used in the separation of organic pollutants from water sources like rivers and lakes . The PDMS–SiO 2 –TiO 2 composite as photocatalyst was prepared for degrading dyes by using a thin-film fixed-bed reactor …”