Visible-light photocatalytic degradation of tartrazine using hydrothermal synthesized Ag-doped TiO2 nanoparticles

Ratshiedana, Rudzani; Fakayode, Olayemi J.; Mishra, Ajay Kumar; Kuvarega, Alex T.

doi:10.1016/j.jwpe.2021.102372

Cited by 22 publications

(9 citation statements)

References 21 publications

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“…In order to investigate the main reactive species, including h + , ·OH and ·O 2 − , which were produced during the photocatalytic degradation of RhB, the trapping series of experiments were implemented in the presence of the radicals’ scavengers, determining the photocatalytic mechanism of the Ag-TiO 2 NPs. Thus, ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), benzoquinone (BQ) and isopropanol (IPA) were introduced, acting as scavengers, to test the effect of ·OH, ·O 2 − and h + active species in the photocatalytic experiment, respectively [ 77 , 78 ] ( Table 2 ).…”

Section: Resultsmentioning

confidence: 99%

“…The results demonstrated that the photocatalytic degradation efficiency of Ag-TiO 2 NPs decreased in the presence of scavengers, and this decrease is statistically significant [ 73 , 78 ] ( Figure 13 ). The photocatalytic studies with scavengers were performed under the same test conditions as those previously mentioned in the absence of them (see Section 3.2.1 ).…”

Section: Resultsmentioning

confidence: 99%

“…The photocatalytic studies with scavengers were performed under the same test conditions as those previously mentioned in the absence of them (see Section 3.2.1 ). The concentration of RhB/scavenger solutions were set at 0.001 M [ 53 , 78 ]. In Table 3 , the calculated photoinduced degradation rate constant (k app ) and the R 2 coefficient of the linear regression are presented, fitting for all the scavengers.…”

Section: Resultsmentioning

confidence: 99%

“…The presence of IPA led to a statistically significant reduction in the photodegradation, indicating hydroxyl radical as the dominant ROS species [ 53 , 78 ]. The photocatalytic degradation efficiency of Ag-TiO 2 was inhibited more when EDTA-2Na was used, proving that the most reactive species of prepared Ag-TiO 2 in the photodegradation process were h+ ( Figure 14 ).…”

Section: Resultsmentioning

confidence: 99%

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Composite Nanoarchitectonics of Photoactivated Titania-Based Materials with Anticancer Properties

et al. 2022

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The synthesis of titania-based composite materials with anticancer potential under visible-light irradiation is the aim of this study. In specific, titanium dioxide (TiO2) nanoparticles (NPs) chemically modified with silver were embedded in a stimuli-responsive microgel (a crosslinked interpenetrating network (IP) network that was synthesized by poly (N-Isopropylacrylamide) and linear chains of polyacrylic acid sodium salt, forming composite particles. The ultimate goal of this research, and for our future plans, is to develop a drug-delivery system that uses optical fibers that could efficiently photoactivate NPs, targeting cancer cells. The produced Ag-TiO2 NPs, the microgel and the composite materials were characterized through X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), micro-Raman spectroscopy, ultraviolet-visible spectroscopy (UV-Vis), dynamic light scattering (DLS) and transmission electron microscopy (TEM). Our results indicated that Ag-TiO2 NPs were successfully embedded within the thermoresponsive microgel. Either Ag-TiO2 NPs or the composite materials exhibited high photocatalytic degradation efficiency on the pollutant rhodamine B and significant anticancer potential under visible-light irradiation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Composite Nanoarchitectonics of Photoactivated Titania-Based Materials with Anticancer Properties

et al. 2022

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“…Both TIO and Zn-TIO displayed four prominent diffraction peaks at 25.3, 38.5, 48.0, and 53.9°, attributed to the (101), (112), (200), and (105) planes of anatase TIO phase, respectively. 28 Specifically, the peaks at 32.8 and 35.2°assigned to the (100) and (101) planes of ZnO were observed for Zn-TIO, identifying the formation of the ZnO phase after Zn doping. 29 In Figure 2g, TIO displayed strong absorbance in the UV and near-visible light region (350−389 nm).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Electroactive, Antibacterial, and Biodegradable Poly(lactic acid) Nanofibrous Air Filters for Healthcare

Yang

Liang

et al. 2023

ACS Appl. Mater. Interfaces

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Poly(lactic acid) (PLA)-based nanofibrous membranes (NFMs) hold great potential in the field of biodegradable filters for air purification but are largely limited by the relatively low electret properties and high susceptibility to bacteria. Herein, we disclosed a facile approach to the fabrication of electroactive and antibacterial PLA NFMs impregnated with a highly dielectric photocatalyst. In particular, the microwave-assisted doping (MAD) protocol was employed to yield Zn-doped titanium dioxide (Zn-TIO), featuring the well-defined anatase phase, a uniform size of ∼65 nm, and decreased band gap (3.0 eV). The incorporation of Zn-TIO (2, 6, and 10 wt %) into PLA gave rise to a significant refinement of the electrospun nanofibers, decreasing from the highest diameter of 581 nm for pure PLA to the lowest value of 264 nm. More importantly, dramatical improvements in the dielectric constants, surface potential, and electret properties were simultaneously achieved for the composite NFMs, as exemplified by a nearly 94% increase in surface potential for 3-day-aged PLA/Zn-TIO (90/10) compared with that of pure PLA. The well regulation of morphological features and promotion of electroactivity contributed to a distinct increase in the air filtration performance, as demonstrated by 98.7% filtration of PM 0.3 with the highest quality factor of 0.032 Pa −1 at the airflow velocity of 32 L/min for PLA/ Zn-TIO (94/6), largely surpassing pure PLA (89.4%, 0.011 Pa −1 ). Benefiting from the effective generation of reactive radicals and gradual release of Zn 2+ by Zn-TIO, the electroactive PLA NFMs were ready to profoundly inactivate Escherichia coli and Staphylococcus epidermidis. The exceptional combination of remarkable electret properties and excellent antibacterial performance makes the PLA membrane filters promising for healthcare.

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Degradation of textiles dyes and scavenging activity of spherical shape obtained anatase phase of Co–Ni-doped TiO2 nanocatalyst

Thakur,

Thakur

2024

J Mater Sci: Mater Electron

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Visible-light photocatalytic degradation of tartrazine using hydrothermal synthesized Ag-doped TiO2 nanoparticles

Cited by 22 publications

References 21 publications

Composite Nanoarchitectonics of Photoactivated Titania-Based Materials with Anticancer Properties

Composite Nanoarchitectonics of Photoactivated Titania-Based Materials with Anticancer Properties

Electroactive, Antibacterial, and Biodegradable Poly(lactic acid) Nanofibrous Air Filters for Healthcare

Degradation of textiles dyes and scavenging activity of spherical shape obtained anatase phase of Co–Ni-doped TiO2 nanocatalyst

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