Enhanced photocatalytic potential of TiO2 nanoparticles in coupled CdTiO2 and ZnCdTiO2 nanocomposites

Khan, Shakeel; Sadiq, Muhammad; Muhammad, Niaz

doi:10.1007/s11356-022-19807-6

Cited by 13 publications

(3 citation statements)

References 44 publications

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“…Some of them are persistent organic pollutants, resistant to environmental deterioration, and continue to enter the ecosystem. 18 Dye levels in wastewater, for instance, are significantly increasing due to extensive clothing usage and everyday life items. This is one of the greatest problems worldwide.…”

Section: Introductionmentioning

confidence: 99%

An investigation on the adsorption and removal performance of a carboxymethylcellulose-based 4-aminophenazone@MWCNT nanocomposite against crystal violet and brilliant green dyes

et al. 2023

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Section: Introductionmentioning

confidence: 99%

An investigation on the adsorption and removal performance of a carboxymethylcellulose-based 4-aminophenazone@MWCNT nanocomposite against crystal violet and brilliant green dyes

et al. 2023

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“…While the TiO 2 sample has two absorption spectra, one in the UV region (~ 240 nm) and another in the visible region (~ 400 nm), this unique behavior for nano-TiO 2 and corresponds to the reported results 37 . In the meantime, the TiO 2 /GQD sample shows higher photo-absorption activity at a lower wavelength (at UV region), which decreases in the higher wavelength (of visible region > 400 nm) 38 . Moreover, the band gap of all samples is calculated from the Tauc/David-Mott formula 29 , as shown in the experimental section.…”

Section: Resultsmentioning

confidence: 90%

Clarifying solvent effect during photocatalytic glycerol conversion on TiO2/GQD as selective photocatalyst

Hassan,

El-Hafiz,

Abdullah

et al. 2023

Sci Rep

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Nowadays, dealing with the growing chemical and energy demands is important without compromising the environment. So, this work studies photocatalytic glycerol conversion (as biomass derivativ feedstock) into value-added products using an eco-friendly synthesized catalyst. Graphene quantum dots (GQDs) were prepared from available/cheap precursors like glucose via the hydrothermal method and used as a support for TiO2. TiO2/GQDs were characterized via different analytical techniques, revealing very small particle sizes of ~ 3–6 nm with a large surface area of ~ 253 m2/g and a band gap of ~ 2.6 eV. The prepared photocatalyst shows good efficiency during photocatalytic glycerol conversion to dihydroxyacetone (DHA). Different reaction conditions were tested: reaction time, catalyst amount, presence of oxidant (H2O2), and biphasic media (aqueous/organic phases). Comparing a monophasic (H2O) photoreactor with a biphasic reactor containing 90% organic phase (ethyl acetate) and 10% aqueous phase (H2O and/or H2O2) indicates that the presence of H2O2 increases glycerol conversion and liquid selectivity to reach 57% and 91%, respectively after 120 min. However, it still suffers a low DHA/GA ratio (2.7). On the other hand, using a biphasic reactor in the presence of an H2O2 oxidant increases the DHA/GA ratio to ~ 6.6, which was not reached in previous research. The formation of H2O/H2O2 as micro-reactors dispersed in the ethyl acetate phase increased the average light intensity effect of the glycerol/photocatalyst system in the micro-reactors. Unlike previous work, this work presents a facile way to prepare eco-friendly/cheap (noble metal free) photocatalysts for glycerol conversion to ultrapure DHA using a biphasic photoreactor.

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“…S1 ) of the BET analysis indicated a significant rise in the adsorbed volume starting at P/P0 = 0.86. The surface area, mean pore diameter, and pore volume of the nano-spinel were 61.75 m 2 /g, 8.72 nm, and 0.256 cm 3 /g, respectively, according to the BET analysis, the spinel nanoparticle had a well-developed mesoporous feature with a high surface area 25 , 32 , 33 .…”

Section: Resultsmentioning

confidence: 96%

Electrochemical and statistical study of Nickel ion assessment in daily children intake samples relying on magnesium aluminate spinel nanoparticles

Mostafa,

Mohamed,

Fouad

2024

Sci Rep

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Lately, children's daily consumption of some products, such as cereals and candies, has been rising, which provides a compelling rationale for determining any metallic substances that may be present. Monitoring the concentration of certain metals, like nickel, in these products is necessary due to medical issues in humans when consumed regularly. So, in this work, a novel and highly selective carbon paste as a Ni(II) ion-selective sensor was prepared and investigated using ceramic magnesium aluminum spinel nanoparticles as the ionophore and tritolyl phosphate (TOCP) as a plasticizer. A modified co-precipitation method was used to synthesize the spinel nanoparticles. X-ray diffraction, scanning electron microscope with EDAX, transmission electron microscope, and BET surface area were used to determine the phase composition, microstructure, pores size, particle size, and surface area of the synthesized nanoparticles. The spinel nanoparticle was found to have a nano crystallite size with a cubic crystal system, a particle size ranging from 17.2 to 51.52 nm, mesoporous nature (average pore size = 8.72 nm), and a large surface area (61.75 m2/g). The composition ratio of graphite carbon as a base: TOCP as binder: spinal as ionophore was 67.3:30.0:2.7 (wt%) based on potentiometric detections over concentrations from 5.0 × 10−8 to 1.0 × 10−2 mol L−1 with LOD of 5.0 × 10−8 mol L−1. A measurement of 29.22 ± 0.12 mV decade−1 over pH 2.0–7.0 was made for the Nernstian slope. This sensor demonstrated good repeatability over nine weeks and a rapid response of 8 s. A good selectivity was shown for Ni(II) ions across many interferents, tri-, di-, and monovalent cations. The Ni(II) content in spiked real samples, including cocaine, sweets, coca, chocolate, carbonated drinks, cereals, and packages, were measured. The results obtained indicated no significant difference between the proposed potentiometric method and the officially reported ICP method according to the F- and t-test data. In addition to utilizing ANOVA statistical analysis, validation procedures have been implemented, and the results exceed the ICP-MS methodology.

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Enhanced photocatalytic potential of TiO2 nanoparticles in coupled CdTiO2 and ZnCdTiO2 nanocomposites

Cited by 13 publications

References 44 publications

An investigation on the adsorption and removal performance of a carboxymethylcellulose-based 4-aminophenazone@MWCNT nanocomposite against crystal violet and brilliant green dyes

An investigation on the adsorption and removal performance of a carboxymethylcellulose-based 4-aminophenazone@MWCNT nanocomposite against crystal violet and brilliant green dyes

Clarifying solvent effect during photocatalytic glycerol conversion on TiO2/GQD as selective photocatalyst

Electrochemical and statistical study of Nickel ion assessment in daily children intake samples relying on magnesium aluminate spinel nanoparticles

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