Synthesis, characterization and photocatalytic activity of Ag metallic particles deposited carbon-doped TiO2 nanocomposites supported on stainless steel mesh

Tijani, Jimoh Oladejo; Totito, Thandiwe Crystal; Fatoba, Ojo O.; Babajide, Omotola; Petrik, Leslie

doi:10.1007/s10971-017-4385-0

Cited by 8 publications

(5 citation statements)

References 28 publications

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“…SEM/EDX mapping of Ag-TiO2 coating presented in Table 2 illustrated the presence of Ti, O and Ag on the coating surfaces. The EDX spectra revealed the presence of Ti, O and Ag signals at 4.508, 0.525 and 2.983 keV similar reported by Tijani et al [27]. The presence of Ag was seen, overlapping with Ti and O spots.…”

Section: Resultssupporting

confidence: 86%

Effect of Silver Content on the Crystalline Phase and Microstructure of TiO2 Coating Deposited on Unglazed Ceramics Tile

Hafizah

Juoi

Zulkifli

et al. 2020

IJAME

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The synthesis of Ag-TiO2 coating using AgNO3 precursor is expected to give the properties as pure as Ag nanoparticles. Commonly, high concentration of Ag attributed to agglomeration of silver species and reduction to Ag0 particles on TiO2 surface. In contrast, at lower concentration, Ag species exist as AgO, Ag2O and Ag0. Hence, the exact amount of Ag, which can effectively control the particle growth and agglomeration, surface area, thermal stability and band gap of the TiO2 coating, are still vague and stated differently. In the present study, the effect of Ag content on the phase transformation and surface morphology of Ag-TiO2 coating were reported. TiO2 sol were prepared by incorporating Ag at 2.5, 5 and 7.5 mol % and deposited on unglazed ceramic tiles thru five times dip coating. The deposited Ag-TiO2 coatings were heat treated at 500 °C for 1 hour soaking time. XRD analyses revealed that the deposited Ag-TiO2 coating consists of anatase, rutile, Ag2O and metallic Ag. Almost all the coating surfaces illustrated cracks. Increased Ag content lead to presence of tiny particles on the surfaces and EDX spectrum revealed the presence of Ti, O and metallic Ag particles. However, at the addition of 5 mol % Ag, there was no metallic Ag presence and a dense coating with the lowest thickness of ±11.4µm is observed.

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Section: Resultssupporting

confidence: 86%

Effect of Silver Content on the Crystalline Phase and Microstructure of TiO2 Coating Deposited on Unglazed Ceramics Tile

Hafizah

Juoi

Zulkifli

et al. 2020

IJAME

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Section: Resultsmentioning

confidence: 99%

“…The C-N-TiO 2 nanocomposites adopted different morphologies for each support. This was related to the physical, chemical and mechanical properties of solid supports SS, SS/Ti(N,O) and SS/Cr-N/Cr(N,O) and their interaction with the nano catalyst [55,77]. Even though the anticorrosion coatings used in this study have the same base/substrate SS, the anticorrosion layers Ti(N,O) and CrN/Cr(N,O) deposited by CAE on SS conferred different properties to the newly fabricated SS/Ti(N,O) and SS/Cr-N/Cr(N,O) coatings when compared to SS substrate [49,50].…”

Section: Discussionmentioning

confidence: 99%

“…Subtle differences in morphology were induced by the underlying anticorrosion coating, which should be further explored. The anticorrosion layers offer a route to prevent SS corrosion in the highly oxidative environment over time[76,77].In addition to the rate constant discussed in Figure7b,d, the half-life (t 1/2 ) was selected as supplementary indication of the first order chemical decomposition of O.II under solar or UV light. This indicator denotes the time taken for the concentration of orange II to decay to half its initial concentration during the photo catalysis process.…”

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confidence: 99%

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Anticorrosion Coated Stainless Steel as Durable Support for C-N-TiO2 Photo Catalyst Layer

et al. 2020

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The development of durable photocatalytic supports resistant in harsh environment has become challenging in advanced oxidation processes (AOPs) focusing on water and wastewater remediation. In this study, stainless steel (SS), SS/Ti (N,O) and SS/Cr-N/Cr (N,O) anticorrosion layers on SS meshes were dip-coated with sol gel synthesised C-N-TiO2 photo catalysts pyrolysed at 350 °C for 105 min, using a heating rate of 50 °C/min under N2 gas. The supported C-N-TiO2 films were characterised by scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Raman spectroscopy. The results showed that C-N-TiO2 was successfully deposited on anticorrosion coated SS supports and had different morphologies. The amorphous C and TiO2 were predominant in C-N-TiO2 over anatase and rutile phases on the surface of SS and anticorrosion supports. The C-N-TiO2 coated films showed enhanced photocatalytic activity for the decolouration of O.II dye under both solar and UV radiations. The fabricated C-N-TiO2 films showed significant antibacterial activities in the dark as well as in visible light. Herein, we demonstrate that SS/Ti(N,O) and SS/Cr-N/Cr(N,O) anticorrosion coatings are adequate photocatalytic and corrosion resistant supports. The C-N-TiO2 photo catalytic coatings can be used for water and wastewater decontamination of pollutants and microbes.

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“…In order to comply with the environmental regulatory framework visa-vis improvement of water quality, cost effective, sustainable, and advanced treatment techniques need to be established. Among various advanced oxidation processes (AOPs), heterogeneous photocatalysts such as titanium dioxide (TiO2) have been identified as a possible treatment method for water pollution remediation due to unique characteristics such as low cost, photochemical stability, and strong oxidizing power [1]. Nevertheless, post-filtration of the suspended TiO2 particles after water treatment, high band gap energy, and high recombination of electron-hole pairs constitute serious disadvantages that limit their industrial applications [2].…”

mentioning

confidence: 99%

Synthesis and Characterization of Supported TiO2 Based Nano Catalysts and Application for the Removal of Water Contaminants

Petrik

Tijani

Gura

et al. 2019

Priorities of Chemistry for a Sustainable Development-Priochem

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Synthesis, characterization and photocatalytic activity of Ag metallic particles deposited carbon-doped TiO2 nanocomposites supported on stainless steel mesh

Cited by 8 publications

References 28 publications

Effect of Silver Content on the Crystalline Phase and Microstructure of TiO2 Coating Deposited on Unglazed Ceramics Tile

Effect of Silver Content on the Crystalline Phase and Microstructure of TiO2 Coating Deposited on Unglazed Ceramics Tile

Anticorrosion Coated Stainless Steel as Durable Support for C-N-TiO2 Photo Catalyst Layer

Synthesis and Characterization of Supported TiO2 Based Nano Catalysts and Application for the Removal of Water Contaminants

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