Study of the characteristics and properties of the SiO2/TiO2/Nb2O5 material obtained by the sol–gel process

Fonseca, Bruna Teixeira da; D’Elia, Eliane; Júnior, José Márcio Siqueira; Oliveira, Serafim M.; Castro, Kelly Leite dos Santos; Ribeiro, Emerson Schwingel

doi:10.1038/s41598-020-80310-4

Cited by 14 publications

(3 citation statements)

References 65 publications

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“…Table S2 summarizes the key synthesis conditions for the fabricated sorbents and their acronyms. The procedures from the existing literature ,− were modified to synthesize THO inside the carbon block pores (in situ). The detailed synthesis procedures are described in the Supporting Information (SI).…”

Section: Methodsmentioning

confidence: 99%

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Mechanistic Study of Arsenate Adsorption onto Different Amorphous Grades of Titanium (Hydr)Oxides Impregnated into a Point-of-Use Activated Carbon Block

et al. 2023

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Millions of households still rely on drinking water from private wells or municipal systems with arsenic levels approaching or exceeding regulatory limits. Arsenic is a potent carcinogen, and there is no safe level of it in drinking water. Point-of-use (POU) treatment systems are a promising option to mitigate arsenic exposure. However, the most commonly used POU technology, an activated carbon block filter, is ineffective at removing arsenic. Our study aimed to explore the potential of impregnating carbon blocks with amorphous titanium (hydr)oxide (THO) to improve arsenic removal without introducing titanium (Ti) into the treated water. Four synthesis methods achieved 8–16 wt % Ti-loading within the carbon block with a 58–97% amorphous THO content. The THO-modified carbon block could adsorb both oxidation states of arsenic (arsenate and arsenite) in batch or column tests. Modified carbon block with higher Ti and amorphous content always led to better arsenate removal, achieving arsenic loadings up to 31 mg As/mg Ti after 70,000 bed volumes in continuous-flow tests. Impregnating carbon block with amorphous THO consistently outperformed impregnation using crystalline TiO2. The best-performing system (TTIP-EtOH carbon block) was an amorphous THO derived using titanium isopropoxide, ethanol, and acetic acid via the sol–gel technique, aged at 80 °C for 18 h and dried overnight at 60 °C. Comparable pore-size distribution and surface area of the impregnated carbon blocks suggested that chemical properties play a more crucial role than physical and textural properties in removing arsenate via the amorphous Ti-impregnated carbon block. Freundlich isotherms indicated energetically favorable adsorption for amorphous chemically synthesized adsorbents. The mass transport coefficients for the amorphous TTIP-EtOH carbon block were fitted using a pore-surface diffusion model, resulting in D surface = 3.1 × 10–12 and D pore = 3.2 × 10–6 cm2/s. Impregnating the carbon block with THO enabled effective arsenic removal from water without adversely affecting the pressure drop across the unit or the carbon block’s ability to remove polar organic chemical pollutants efficiently.

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Section: Methodsmentioning

confidence: 99%

“…These dimensions were selected to maintain consistency with the hydraulic loading rates and empty bed contact times (EBCT) commonly used in carbon block systems (loading rate of 4.5 m 3 /m 2 •h and an EBCT of 0.28 min). 26 Carbon block cores were then impregnated with THO and used in continuous-flow experiments.…”

Section: Carbon Block Impregnation Proceduresmentioning

confidence: 99%

Mechanistic Study of Arsenate Adsorption onto Different Amorphous Grades of Titanium (Hydr)Oxides Impregnated into a Point-of-Use Activated Carbon Block

et al. 2023

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“…[47] material properties of SiO2/TiO2/Nb2O5 by solgel synthesis method Sol-gel showed high metal oxide dispersion on the silica matrix and the absence of section segregation (SBET). [48] carbonyl sulfide and carbon disulfide over Fe2O3 cluster:…”

Section: Hydrothermalmentioning

confidence: 99%

Review of Characteristics and Properties of Fe2o3/Sio2 as Water Pollution Prevention

Soerya

Edianta

Lailaturofi'ah

et al. 2022

IPR

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The existence of water on earth is very abundant and has a vital role in the source of life for every living creature. In managing water resources, pollution is one of the issues world researchers face. This article reviews the characteristics and methods of synthesizing Fe2O3 and SiO2 materials to prevent water pollution. The strategies administrated antecedently square measure vapor deposition, microemulsion, solvothermal, coprecipitation, sol-gel, and hydrothermal. The formation of fine quality nanoparticles with controlled size associate degreed size distribution square measure typically achieved by selecting an applicable solvent mixture and varied parameters like temperature, pressure, and time interval.

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Disposable electrochemical sensor based on carbon black and ternary oxide (SiO2/TiO2/Nb2O5) for determination of triclosan in mouthwash and water samples

de Oliveira,

Silva,

Fernandes

et al. 2023

J Solid State Electrochem

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Study of the characteristics and properties of the SiO2/TiO2/Nb2O5 material obtained by the sol–gel process

Cited by 14 publications

References 65 publications

Mechanistic Study of Arsenate Adsorption onto Different Amorphous Grades of Titanium (Hydr)Oxides Impregnated into a Point-of-Use Activated Carbon Block

Mechanistic Study of Arsenate Adsorption onto Different Amorphous Grades of Titanium (Hydr)Oxides Impregnated into a Point-of-Use Activated Carbon Block

Review of Characteristics and Properties of Fe2o3/Sio2 as Water Pollution Prevention

Disposable electrochemical sensor based on carbon black and ternary oxide (SiO2/TiO2/Nb2O5) for determination of triclosan in mouthwash and water samples

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