Synthesized TiO2 nanoparticles for the application of photocatalytic degradation of synthetic toxic dye acridine orange

Sirisha, U.; Sowjanya, Bandela; Anjum, H. Rehana; Punugoti, Thanusha; Mohamed, Azah; Vangalapati, Meena

doi:10.1016/j.matpr.2022.04.278

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…The catalyst is well known for its role in enhancing the generation of free radicals by improving the dissociation reaction of water molecules, either in US or in UV irradiation processes. Among all, titanium dioxide as a solid catalyst was found to be the best photocatalyst (Gole & Gogate, 2014; Matoh et al, 2018; Sirisha et al, 2022), and hence, TiO 2 has been selected as an additive for further optimization work in this study. In order to investigate the effect of TiO 2 loading on the extent of degradation of magenta dye using US and UV irradiation, TiO 2 loading was varied over the range of 0.2–1.0 g/l, and the obtained results are depicted in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

Degradation of magenta dye using cavitation‐based transducers to glass marble: Lab to semi‐pilot scale operations

Bagal

Suryawanshi

Shinde³

et al. 2023

Water Environment Research

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In the present work, the degradation of magenta dye has been investigated using ultrasonic (US) and ultraviolet (UV) irradiation at a laboratory scale.Additionally, the investigation was conducted at a semi-pilot scale by employing hydrodynamic cavitation and a novel air-marble cavitation reactor. Initially, optimization studies such as the effect of initial dye concentration and catalyst loading of TiO 2 and MnO 2 followed by the effect of combined catalyst loading (TiO 2 /MnO 2 ) on the extent of degradation have been studied at a capacity of 3 L. It was observed that the US irradiation results in 87.1% and 68.2% of degradation, whereas the UV irradiation results in 79.8% and 56.4% extent of degradation at 1 g/l of TiO 2 and 0.8 g/l of MnO 2 , respectively.The maximum degradation was 92.1% at the combined loading of 0.6 g/l (1:0.8; TiO 2 :MnO 2 ) using US irradiation with a capacity of 3 L and 81.3% using a hydrodynamic cavitation reactor with a semi-pilot scale capacity of 7 L. The chemical oxygen demand (COD) analysis also showed the highest COD removal of 92% at a small scale using the US irradiation and 76% at a semi-pilot scale using hydrodynamic cavitation. On a small scale, the cost of a US/TiO 2 + MnO 2 treatment scheme is US$ 0.01/L, whereas on a semipilot scale using HC/TiO 2 + MnO 2 , the cost is US$ 0.04/L. Both of these treatment schemes offer viable pathways for degradation based on energy and economic assessments. Overall, the current work has clearly demonstrated the effectiveness of the cavitational reactor for the efficient degradation of magenta dye from lab to semi-pilot scale operation. Practitioner Points:• Small-scale dye containing wastewater treatment using ultrasound and ultraviolet irradiation • Combined use of catalysts at large-scale operations with novel cavitation techniques • Novel cavitation techniques studied for dye degradation.• Energy efficiency and cost analysis evaluated for AOPs studies.

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Section: Resultsmentioning

confidence: 99%

Degradation of magenta dye using cavitation‐based transducers to glass marble: Lab to semi‐pilot scale operations

Bagal

Suryawanshi

Shinde³

et al. 2023

Water Environment Research

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“…The repercussions of discharging wastewater in this manner further enhance the textile industry's standing as a notable global water consumer and a signi cant contributor to pollution. The enduring nature and ability to dissolve of intricate arti cial dyes in water pose substantial risks to the environment and human well-being [3,4].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of zinc oxide nanoparticles from Allium cepa skin: photo catalytic degradation and antibacterial properties

Sowjanya,

King,

Vangalapati

et al. 2024

Chem. Pap.

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The present study uses a bio-waste i.e., skin of Allium cepa, for green synthesis of zinc oxide nanoparticles. The nanoparticles A.Cepa-ZnONP were tested for their photo catalytic degradation e cacy towards harmful dyes. Additionally, the anti-bacterial properties of A.Cepa-ZnONP were evaluated against four organisms, namely Escherichia coli (EC), Pseudomonas aeruginosa (PA), Bacillus cereus (BC), and Staphylococcus aureus (SA). The synthesized A.Cepa-ZnONP was characterized with scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), X-ray diffraction (XRD), and Fouriertransform infrared spectroscopy (FTIR) methods. The A.Cepa-ZnONP demonstrated e cient degradation of Crystal Violet (CV), Rhodamine B (RB), and Methylene blue (MB) dyes, achieving maximum degradation percentages of 99.21%, 95.63%, and 92.34%, respectively, while operating under optimal process conditions. The rate constant values for CV, RB, and MB dyes at a temperature of 328K were determined to be 0.1063, 0.0758, and 0.0447 min -1 , respectively. The activation energy values for CV, RB, and MB dyes were determined to be 12.28, 18.437, and 50.623 kJ/mol, respectively. The successful regeneration of photo catalytic material A.Cepa-ZnONP is a crucial milestone in guaranteeing their longterm effectiveness and practical usability.

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“…[5] . Among these methods, photocatalysis is an inexpensive, green, and environmentally friendly process that provides full degradation of dyes, with no production of secondary pollution [6] …”

Section: Introductionmentioning

confidence: 99%

“…[5] Among these methods, photocatalysis is an inexpensive, green, and environmentally friendly process that provides full degradation of dyes, with no production of secondary pollution. [6] Titanium dioxide (TiO 2 ) is an important semiconductor photocatalyst used for the treatment of dye pollution. [7] Titanium exists as different polymorphs with various physical properties, such as brookite, anatase, and rutile phases.…”

Section: Introductionmentioning

confidence: 99%

Reusable TiO₂‐SBA‐15 Synthesized by Different Silica/Titania Ratios for Photodegradation

Göl,

Akbay

2023

ChemistrySelect

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A series of TiO2/SBA‐15 photocatalysts were synthesized with different Si/Ti ratios by a one‐step hydrothermal method with TiO2 nano‐powder. During the synthesis of TiO2/SBA‐15 s, the SBA‐15 pore structure and channels did not deteriorate, and the Si/Ti molar ratios were close to the expected nominal ratios. Photocatalysts exhibited a uniform‐narrow pore size distribution, and the BET areas were in the range of 621–583 m2/g. TiO2 nanocrystals into the SBA‐15 mesopores walls achieve up to the ratio of Si/Ti=16. The optical band gap energies were significantly red‐shifted with increasing Ti insertion, which is the quantization effects improving the photocatalytic activities. The photocatalytic activities of the TiO2/SBA‐15 s were evaluated by the degradation of methylene blue under a UV‐light irradiation at a constant TiO2 content. The highest efficiency was obtained in the TiO2/SBA‐15(16) photocatalyst at 79.6 %. The results of reusability and stability analyses demonstrate that the photocatalyst activity and stability are good, and that the photocatalytic activity was sustainable after reuse for several cycles.

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Synthesized TiO2 nanoparticles for the application of photocatalytic degradation of synthetic toxic dye acridine orange

Cited by 10 publications

References 9 publications

Degradation of magenta dye using cavitation‐based transducers to glass marble: Lab to semi‐pilot scale operations

Degradation of magenta dye using cavitation‐based transducers to glass marble: Lab to semi‐pilot scale operations

Green synthesis of zinc oxide nanoparticles from Allium cepa skin: photo catalytic degradation and antibacterial properties

Reusable TiO₂‐SBA‐15 Synthesized by Different Silica/Titania Ratios for Photodegradation

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Synthesized TiO2 nanoparticles for the application of photocatalytic degradation of synthetic toxic dye acridine orange

Cited by 10 publications

References 9 publications

Degradation of magenta dye using cavitation‐based transducers to glass marble: Lab to semi‐pilot scale operations

Degradation of magenta dye using cavitation‐based transducers to glass marble: Lab to semi‐pilot scale operations

Green synthesis of zinc oxide nanoparticles from Allium cepa skin: photo catalytic degradation and antibacterial properties

Reusable TiO2‐SBA‐15 Synthesized by Different Silica/Titania Ratios for Photodegradation

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Product

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Reusable TiO₂‐SBA‐15 Synthesized by Different Silica/Titania Ratios for Photodegradation