Green fabrication of titanium dioxide nanoparticles and their applications in photocatalytic dye degradation and microbial activities

Rathi, V. Helen; Jeice, Ambrose Rejo

doi:10.1016/j.chphi.2023.100197

Cited by 34 publications

(7 citation statements)

References 48 publications

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“…The TiO 2 NPs synthesized by any route can be easily characterized by using UV-Vis spectrophotometry, Fourier transform infrared, X-ray diffraction, and electron microscopy for the confirmation of the formation of TiO 2 NPs, elemental composition, and purity (Agarwal et al, 2022 ; Yadav et al, 2023b ). Characterization of TiO 2 NPs also becomes important to reveal the phase of the synthesized TiO 2 NPs, as they may exist in three different forms under different physical and chemical conditions (Rathi and Jeice, 2023 ).…”

Section: Characterization Of Tio 2 Npsmentioning

confidence: 99%

“…So, it could be concluded that TiO 2 NPs alone cannot mineralize the dyes, so they must be used either in the nanocomposite form or in the metal-doped form for enhanced dye removal efficiency from the wastewater. When TiO 2 NPs were used alone for dye removal, smaller-sized TiO 2 NPs exhibited higher dye removal percentages; for instance, 87% of MB dye was removed with 12–18 nm-sized TiO 2 NPs, whereas remediation of reactive red 31 dye was ~75% with TiO 2 NPs of size 22.1–97.28 nm (Khan and Fulekar, 2016 ; Rathi and Jeice, 2023 ). Balaraman et al ( 2022 ) attempted to degrade ~92.92% MB dye from wastewater by using 50–90 nm-sized TiO 2 NPs from S. myriocystum .…”

Section: Application Of Tio 2 Npsmentioning

confidence: 99%

“…In addition to these eukaryotic microorganisms, other eukaryotic microorganisms (fungi, yeast, mushrooms, and algae) have also been used for the synthesis of TiO 2 NPs. In the majority of the cases, investigators have used bacterial culture supernatant for the biosynthesis of TiO 2 NPs (Srinivasan et al, 2022 ; Rathi and Jeice, 2023 ). Moreover, the most preferred titanium precursors were titanyl sulfate and titanyl hydroxide, whose molarity was mainly 0.025 mM.…”

Section: Introductionmentioning

confidence: 99%

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Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Rathore,

Yadav,

Gacem

et al. 2023

Front. Microbiol.

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Nanotechnology (NT) and nanoparticles (NPs) have left a huge impact on every field of science today, but they have shown tremendous importance in the fields of cosmetics and environmental cleanup. NPs with photocatalytic effects have shown positive responses in wastewater treatment, cosmetics, and the biomedical field. The chemically synthesized TiO2 nanoparticles (TiO2 NPs) utilize hazardous chemicals to obtain the desired-shaped TiO2. So, microbial-based synthesis of TiO2 NPs has gained popularity due to its eco-friendly nature, biocompatibility, etc. Being NPs, TiO2 NPs have a high surface area-to-volume ratio in addition to their photocatalytic degradation nature. In the present review, the authors have emphasized the microbial (algae, bacterial, fungi, and virus-mediated) synthesis of TiO2 NPs. Furthermore, authors have exhibited the importance of TiO2 NPs in the food sector, automobile, aerospace, medical, and environmental cleanup.

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Section: Characterization Of Tio 2 Npsmentioning

confidence: 99%

Section: Application Of Tio 2 Npsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Rathore,

Yadav,

Gacem

et al. 2023

Front. Microbiol.

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“…Semiconducting nanoparticle (SNP)-based photocatalysis exhibits substantial potential for heterogeneous photocatalytic degradation-based AOPs owing to its simplicity, cost-effectiveness, nontoxic nature, impressive degradation efficiency, and outstanding stability . Numerous SNPs, including ZnO, CuO, TiO 2 , NiO, and SnO 2, have been harnessed as photocatalysts to eliminate organic dyes. − Among these, titanium dioxide (TiO 2 ) has garnered significant attention in photocatalysis . In 1972, Fujishima and Honda first suggested employing TiO 2 in photocatalysis, illustrating its capability to split water and generate hydrogen under light exposure .…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Band Gap-Tunable Kappa-Carrageenan-Mediated C,S-Doped TiO₂ Nanoparticles for Enhanced Dye Degradation

Erjeno,

Asequia,

Osorio

et al. 2024

ACS Omega

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Semiconducting nanoparticles (SNPs) have garnered significant attention for their role in photocatalysis technology, offering a cost-effective and highly efficient method for breaking down organic dyes. Of particular significance within SNP-based photocatalysis are tunable band gap TiO 2 nanoparticles (NPs), which demonstrate remarkable enhancement in photocatalytic efficiency. In the present work, we introduce an approach for the synthesis of TiO 2 NPs using kappa-carrageenan (κ-carrageenan), not just as a reducing and stabilizing agent but as a dopant for the resulting TiO 2 NPs. During the synthesis of TiO 2 NPs in the presence of sulfate-rich carrageenan, the process predominantly leaves residual sulfur and carbon. The presence of residual carbon, in conjunction with sulfur doping, as indicated by fast FTIR spectra, XPS, and EDX, leads to a significant reduction in the band gap of the resulting composite to 2.71 eV. The reduction of composite band gap yields remarkable degradation of methylene blue (99.97%) and methyl orange (97.84%). This work presents an eco-friendly and highly effective solution for the swift removal of environmentally harmful organic dyes.

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“…Traran and their team synthesized 104.63 ± 27.75 nm TiO 2 NPs by using Halomonas elongata IBRC-M 10214 ( Taran et al, 2018 ). In the majority of the cases, investigators have utilized bacterial culture supernatant for the biosynthesis of TiO 2 NPs ( Srinivasan et al, 2022 ; Rathi and Jeice, 2023 ). Previously, Bacillus sp.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of titanium dioxide nanoparticles from Bacillus subtilis MTCC 8322 and its application for the removal of methylene blue and orange G dyes under UV light and visible light

Rathore,

Yadav,

Amari

et al. 2024

Front. Bioeng. Biotechnol.

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Over the last decade there has been a huge increase in the green synthesis of nanoparticles. Moreover, there is a continuous increase in harnessing the potential of microorganisms for the development of efficient and biocompatible nanoparticles around the globe. In the present research work, investigators have synthesized TiO2 NPs by harnessing the potential of Bacillus subtilis MTCC 8322 (Gram-positive) bacteria. The formation and confirmation of the TiO2 NPs synthesized by bacteria were carried out by using UV-Vis spectroscopy, Fourier transforms infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDX/EDS). The size of the synthesized TiO2 NPs was 80–120 nm which was spherical to irregular in shape as revealed by SEM. FTIR showed the characteristic bands of Ti-O in the range of 400–550 cm−1 and 924 cm−1 while the band at 2930 cm−1 confirmed the association of bacterial biomolecules with the synthesized TiO2 NPs. XRD showed two major peaks; 27.5° (rutile phase) and 45.6° (anatase phase) for the synthesized TiO2 NPs. Finally, the potential of the synthesized TiO2 NPs was assessed as an antibacterial agent and photocatalyst. The remediation of Methylene blue (MB) and Orange G (OG) dyes was carried out under UV- light and visible light for a contact time of 150–240 min respectively. The removal efficiency for 100 ppm MB dye was 25.75% and for OG dye was 72.24% under UV light, while in visible light, the maximum removal percentage for MB and OG dye was 98.85% and 80.43% respectively at 90 min. Moreover, a kinetic study and adsorption isotherm study were carried out for the removal of both dyes, where the pseudo-first-order for MB dye is 263.269 and 475554.176 mg/g for OG dye. The pseudo-second-order kinetics for MB and OG dye were 188.679 and 1666.667 mg/g respectively. In addition to this, the antibacterial activity of TiO2 NPs was assessed against Bacillus subtilis MTCC 8322 (Gram-positive) and Escherichia coli MTCC 8933 (Gram-negative) where the maximum zone of inhibition in Bacillus subtilis MTCC 8322 was about 12 mm, and for E. coli 16 mm.

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Green fabrication of titanium dioxide nanoparticles and their applications in photocatalytic dye degradation and microbial activities

Cited by 34 publications

References 48 publications

Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Facile Synthesis of Band Gap-Tunable Kappa-Carrageenan-Mediated C,S-Doped TiO₂ Nanoparticles for Enhanced Dye Degradation

Synthesis and characterization of titanium dioxide nanoparticles from Bacillus subtilis MTCC 8322 and its application for the removal of methylene blue and orange G dyes under UV light and visible light

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Green fabrication of titanium dioxide nanoparticles and their applications in photocatalytic dye degradation and microbial activities

Cited by 34 publications

References 48 publications

Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Microbial synthesis of titanium dioxide nanoparticles and their importance in wastewater treatment and antimicrobial activities: a review

Facile Synthesis of Band Gap-Tunable Kappa-Carrageenan-Mediated C,S-Doped TiO2 Nanoparticles for Enhanced Dye Degradation

Synthesis and characterization of titanium dioxide nanoparticles from Bacillus subtilis MTCC 8322 and its application for the removal of methylene blue and orange G dyes under UV light and visible light

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Facile Synthesis of Band Gap-Tunable Kappa-Carrageenan-Mediated C,S-Doped TiO₂ Nanoparticles for Enhanced Dye Degradation