Reusable and Antibacterial Polymer‐Based Nanocomposites for the Adsorption of Dyes and the Visible‐Light‐Driven Photocatalytic Degradation of Antibiotics
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Adsorption and advanced oxidation processes, especially photocatalysis, are amongst the most common water treatment methodologies. Unfortunately, using each of these techniques independently does not fully eliminate the pollutants of diverse nature, which are present in wastewater. Here, an avenue for multifunctional materials for water treatment is opened by reporting for the first time the preparation, characterization, and study of the properties of a novel multifunctional nanocomposite with both adsorption and visible-light-driven photocatalysis abilities. These multifunctional nanocomposites, namely iron (II, III) oxide/poly(Keywords:
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The simple synthesis of TiO2 and improved visible-light photocatalytic performance of TiO2 have been the goal of researchers. When compared to pure phase TiO2, mixed-phase TiO2 nanoparticles with oxygen vacancies can aid in lowering the band gap and carrier recombination rate, which improves the performance of visible light photocatalysis. In this study, three different acids were separately applied in the hydrothermal synthesis of TiO2 nanoparticles without any post-heat treatment. The reaction was carried out at a relatively low temperature not exceeding \(140^{\circ}\)C. Under the visible light illumination-assisted photocatalytic degradation of methyl orange in water, the TiO2 nanoparticles obtained from HCl (H-TiO2) and CH3COOH (A-TiO2) showed stable photocatalysis performance for increasing the cycles up to ten times while only five cycles for TiO2 nanoparticles obtained by HNO3-assisted (N-TiO2). Compared with efficiencies of N-TiO2 nanoparticles, H-TiO2 and A-TiO2 showed superior efficiencies and have excellent photocatalytic performances when assisting in the degradation of methyl orange in water under visible light illumination. The high visible-light photocatalytic performance and the simple acid-assisted synthesis of the H-TiO2 and A-TiO2 nanoparticles will promote the industrial application.
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Photocatalysis and titanium dioxide photocatalysts is one of the important investigation subjects.In order to make undergraduates majoring in chemistry to grasp the principle of photocatalysis and preparation of photocatalyst,an experiment was designed,including the preparation of nanometer-sized anatase titanium dioxide photocatalyst by the sol-gel method and photocatalytic degradation of methyl orange.
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TiO2 is a kind of widely used photocatalyst in photocatalytic reaction.Because of its excellent photocatalytic characteristic,titanium dioxide photocatalyst has attractive potential applications in various fields of environmental protection.especially wastewater treatment and air purification.In this paper,various carrier and immobilization methods for TiO2 photocatalyst are reviewed,to provide the help to develop high efficient,practical photocatalyst finally.
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The principle of the photocatalytic degradation of organic molecules using titanium dioxide is analyzed.The factors affecting the TiO2 photocatalytic efficiency and recent developments in various photocatalytic methods and relating mechanisms for improving the photocatalytic efficiency of titanium dioxide are summarized.
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Nanosized titanium dioxide is widely used in environmental and material fields such as waste water treatment,air puriffication and antibacteria and self-purification of material surfaces because of its photocatalysis.It is very important to immobilize the photocatalysis onto substrates.This paper is a review about the immobilizations of nanosized titanium dioxide photocatalysis,including immobilization methods,immobilization mechanisms and their qualification.
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Titanium dioxide (TiO2) is widely used as a photocatalyst for the purification of industrial wastes. Scientists have attempted to enhance its photocatalytic activity by doping it with metallic and non-metallic elements. Metal dopants can shift TiO2 absorption from ultra violet (UV) to visible light but may reduce photocatalytic efficiency due to recombination centres. Doping TiO2 with non-metals like N, C, S, and F can narrow the energy band gap and improve photocatalytic efficiency. In this work, we studied S-doped TiO2, which combines high photocatalytic activity and structural stability.
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