Optimization of Photocatalytic Degradation of Tetracycline Using Titania Based on Natural Zeolite by Response Surface Approach

Saadati, Farzaneh; Keramati, Narjes; Ghazi, Mohsen Mehdipour

doi:10.3103/s1063455x20010087

Cited by 12 publications

(4 citation statements)

References 21 publications

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“…The degradation efficiency corresponds to 58.0 and 31.0% under different irradiation sources. Farzaneh et al [119] used the Seman natural zeolite (clinoptilolite) and TiO 2 P25 as materials to prepare a mixed photocatalyst through stirring and ultrasonication. The photodegradation performance of tetracycline (TC) in an aqueous solution was studied using the as-prepared TiO 2 /CP.…”

Section: Ex-situ Methodsmentioning

confidence: 99%

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Zhou,

Wang,

Shen

et al. 2024

Catalysts

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One of the most challenging problems for people around the world is the lack of clean water. In the past few decades, the massive discharge of emerging organic pollutants (EOPs) into natural water bodies has exacerbated this crisis. Considerable research efforts have been devoted to removing these EOPs due to their biotoxicity at low concentrations. Heterogeneous photocatalysis via coupling clay minerals with nanostructured semiconductors has proven to be an economical, efficient, and environmentally friendly technology for the elimination of EOPs in drinking water and watershed water. Natural zeolite minerals (especially clinoptilolites) are regarded as appropriate supports for semiconductor-based photocatalysts due to their characteristics of having a low cost, environmental friendliness, easy availability, co-catalysis, etc. This review summarizes the latest research on clinoptilolites used as supports to prepare binary and ternary metal oxide or sulfide semiconductor-based hybrid photocatalysts. Various preparation methods of the composite photocatalysts and their degradation efficiencies for the target contaminants are introduced. It is found that the good catalytic activity of the composite photocatalyst could be attributed to the synergistic effect of combining the clinoptilolite adsorbent with the semiconductor catalyst in the heterogeneous system, which could endow the composites with an excellent adsorption capacity and produce more e−/h+ pairs under suitable light irradiation. Finally, we highlight the serious threat of EOPs to the ecological environment and propose the current challenges and limitations, before putting the zeolite mineral composite photocatalysts into practice. The present work would provide a theoretical basis and scientific support for the application of zeolite-based photocatalysts for degrading EOPs.

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Section: Ex-situ Methodsmentioning

confidence: 99%

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Zhou,

Wang,

Shen

et al. 2024

Catalysts

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“…The equal amount of reactive radicals formed in all concentrations might lead to an increased reaction of TC molecules with radicals at lower TC concentrations. This could also result in a decrease in the degradation [60]. The reusability of Cu 7 S 4 (250 • C) was evaluated in order to determine its long-term use as a photocatalyst in the removal of TC.…”

Section: Effect Of Initial Concentration Of Tcmentioning

confidence: 99%

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

et al. 2021

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In this paper, spherical-shaped pure phase djurleite (Cu31S16) and roxbyite (Cu7S4) nanoparticles were prepared by a solvothermal decomposition of copper(II) dithiocarbamate complex in dodecanthiol (DDT). The reaction temperature was used to control the phases of the samples, which were represented as Cu31S16 (120 °C), Cu31S16 (150 °C), Cu7S4 (220 °C), and Cu7S4 (250 °C) and were characterized by using X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM), and absorption spectroscopy. The samples were used as photocatalysts for the degradation of tetracycline (TC) under visible light irradiation. The results of the study showed that Cu7S4 (250 °C) exhibited the best activity in the reaction system with the TC degradation rate of up to 99% within 120 min of light exposure, while the Cu31S16 (120 °C) system was only 46.5% at the same reaction condition. In general, roxbyite Cu7S4 (250 °C) could be considered as a potential catalyst for the degradation of TC in solution.

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“…In recent years, different processes have been used to remove various dyes, including adsorption, photocatalytic, ion exchange, sedimentation, reverse osmosis, membrane ltration, and oxidation. Each of these methods has its own strengths and weaknesses [9][10][11]. As one of the advanced environmental puri cation technologies, the photocatalytic degradation has attracted more attention in creating an option for the problems of dyes pollution.…”

Section: Introductionmentioning

confidence: 99%

CeVO 4 /Bentonite nanocomposite as a dual-functional photocatalytic adsorbent: One-step hydrothermal synthesis for enhanced water-soluble pollutant degradation

Farhadi,

Mousavi-Kamazani,

Keramati

et al. 2024

Preprint

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Cerium vanadate/Bentonite (CeVO4/bt) nanocomposite with different composition percentages was synthesized through a simple one-step hydrothermal method at 180 ℃ then photocatalytic activity was evaluated by decolorizing methylene blue (MB) in an aqueous solution under light exposure. The structural and optical properties of the synthesized composites were determined by XRD, FT-IR, DRS, FESEM, EDS, and BET measurements. XRD and EDS results confirmed the successful synthesis of CeVO4. The calculated band gap energy for modified cerium vanadate/bentonite (CeVO4/mbt) was the lowest among all, indicating its more appropriateness for photocatalytic removal of MB dye. nanoparticles were well distributed on bentonite. Due to the synergistic effects, the MB removal efficiency (for just 0.1 g) of CeVO4/mbt nanocomposite was significantly increased (99% in 15 min) compared with neat bentonite, CeVO4, and CeVO4/bt samples. The mineralization degree of MB dye was also studied which obtained 61% for CeVO4/mbt sample. The mentioned nanocomposite followed the first order kinetics and constant speed equal to 0.957 min-1 and showed acceptable stability in five consecutive cycles. This research presents a simple approach to creating novel, very efficient modified nanocomposites for use in photocatalysis applications.

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Optimization of Photocatalytic Degradation of Tetracycline Using Titania Based on Natural Zeolite by Response Surface Approach

Cited by 12 publications

References 21 publications

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

CeVO 4 /Bentonite nanocomposite as a dual-functional photocatalytic adsorbent: One-step hydrothermal synthesis for enhanced water-soluble pollutant degradation

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