Synthesis, characterization and photocatalytic activity using SiO₂-TiO₂ nanocomposites under UV light

Abstract

SiO2-TiO2 nanocomposites were synthesized by the sol-gel method with different SiO2 contents (0.125, 0.25, 0.50 and 0.75%wt). The characteristics of prepared samples were obtained from x-ray diffractometer (XRD), field emission scanning electron microscope (FESEM), UV–visible spectrophotometer, and Brunauer Emmett and Teller (BET) surface area analyzer. SiO2-TiO2 nanocomposites have higher UV absorption capability and a higher specific surface area compared to pure TiO2, resulting in improved dye degradation by photocatalytic activity. The results show that the dye degradation efficiency of 0.5SiO2-TiO2 is higher than pure TiO2. It can degrade the dye up to 96.91% within 2 h, while TiO2 was able to degrade dye at 88.62%.

To study the synthesis and characterization of photocatalyst TiO2/SiO2 nanocomposite prepared by Co-Precipitation method

“…The organic component is then broken down by this hydroxyl radical (OH*) into water (H2O) and carbon dioxide (CO2). [9] As per the above literature review, in the present work, it was reported that Nanocomposite of TiO2/ SiO2 was synthesized by the co-precipitation Method i.e. wet chemical precipitation Method.…”

Optimization of SiO 2 –TiO 2 nanocomposite in hole‐transporting layer (PEDOT:PSS) for enhanced performance of planar Si‐based hybrid solar cells

“…A modified sol–gel method was used for the synthesis of SiO 2 –TiO 2 NC 42 . TTIP solution was first prepared by adding 9 mL of TTIP in 100 mL of absolute ethanol.…”

“…A modified sol-gel method was used for the synthesis of SiO 2 -TiO 2 NC. 42 TTIP solution was first prepared by adding 9 mL of TTIP in 100 mL of absolute ethanol. After this, dried SiO 2 NPs were added to the solution with a 0.75% weight to volume ratio.…”

Ternary Graphene Oxide and Titania Nanoparticles-Based Nanocomposites for Dye Photocatalytic Degradation: A Review

“…Ternary magnetic photocatalytic GO composites have been investigated for the photodegradation of dyes (methylene blue, rhodamine B, methyl orange, crystal violet, tartrazine and malachite green). Although the most common configuration of the nanocomposite consists of graphene oxide layers decorated with magnetite (Fe 3 O 4 ) and titania (TiO 2 ) nanoparticles [ 87 , 88 , 89 , 90 , 91 , 92 , 93 ]; other morphologies have been explored, such as: core/shell Fe 3 O 4 @TiO 2 nanoparticles on graphene oxide [ 94 , 95 , 96 , 97 ]; core/shell Fe 3 O 4 @SiO 2 + TiO 2 nanoparticles on graphene oxide [ 98 ], and graphene sheets wrapping Fe 3 O 4 and TiO 2 nanoparticles in a sort of nanocapsule [ 99 ]; a schematic summary of these morphologies is presented in Figure 6 . Coprecipitation is a widely used technique to synthesize inorganic nanoparticles; two or more water soluble salts react in aqueous solution to form a water insoluble salt that precipitates and forms nanoparticles.…”

“… Schematic representations of the different configurations reported in the literature for ternary nanocomposites of graphene oxide, magnetite nanoparticles (Fe 3 O 4 ) and titania nanoparticles (TiO 2 ) [ 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 ]. …”