Sol-Gel Synthesis of TiO₂/SiO₂ and ZnO/SiO₂ Composite Films and Evaluation of Their Photocatalytic Activity towards Methyl Green

Abstract

The TiO2/SiO2 and ZnO/SiO2 composite films were prepared by sol-gel dip coating method. The surface morphology and crystal structure of thin films were characterized by means of scanning electron microscopy (SEM) with elementary dispersive X-ray analysis (EDX) and X-ray diffractometer (XRD). Optical properties of films have been investigated using ultraviolet and visible spectroscopy (UV-visible spectroscopy). The photocatalytic activity was established by testing the degradation and decolorization of methyl green (MG) from aqueous solution with artificial UV-light.

ZnO-SiO2 and Zn2SiO4 Synthesis Utilizing Oil Palm Leaves for Degradation of Methylene Blue Dye in Aqueous Solution

“…Further methods were developed to synthesize the composite on Si glass plates using zinc acetate and tetraethyl orthosilicate (TEOS) in the presence of diethanolamine base. Subsequently, amorphous ZnO/SiO2 film formed after heating the plates at 400 °C, was useful in photodegradation and decolorization of methyl green under UV irradiation [4]. Moreover, the synthesis of ZnO-coated SiO2 was conducted through monodispersed silica spheres prepared by using the Stober method and zinc acetate with ethanol-water solvent in the presence of triethanolamine [5].…”

Experimental and first-principles investigation of the adsorption and entrapping of guanine with SiO2clusters of sol–gel silicate material for understanding DNA photodamage

“…3 Thus, pore-size tuning is one of the most significant factors that enable the generic sol-gel technology to achieve the entrapment of many types of biomolecules of diverse sizes for a wide range of applications. [19][20][21][22][23] Silica in healthcare are found as porous glass, which can be designed to encapsulate a specific drug, which can then be released in situ by the degradation of the silica matrix, therefore maximizing therapeutic effects with the reduction of toxicological side effects. [19][20][21][22][23] Silica in healthcare are found as porous glass, which can be designed to encapsulate a specific drug, which can then be released in situ by the degradation of the silica matrix, therefore maximizing therapeutic effects with the reduction of toxicological side effects.…”

“…18 Silica matrices may also have significant advantages, for example, nanobimetal, trimetal and semiconducting oxides have been incorporated into the silicate matrix to enhance the photocatalytic process. [19][20][21][22][23] Silica in healthcare are found as porous glass, which can be designed to encapsulate a specific drug, which can then be released in situ by the degradation of the silica matrix, therefore maximizing therapeutic effects with the reduction of toxicological side effects. 24,25 Thus, mesoporous silica nanoparticles are attractive candidates due to their ability to confine genetic material into their porous space, high chemical resistance to microbial attack, low toxicity, thermal stability and ease of modification.…”

Advanced construction of heterostructured InCrO4–TiO2and its dual properties of greater UV-photocatalytic and antibacterial activity

“…[3][4][5][6] In this regard, some reported metal oxide nanocomposites have revealed excellent photocatalytic performance. [7][8][9] To date, more than 9000 different types of dye have been incorporated in the colour index. 10 MEG is one of the most common dying materials for wood, silk and cotton.…”