Investigation on photocatalytic activity of bio-treated α-Fe2O3 nanoparticles using Phyllanthus niruri and Moringa stenopetala leaf extract against methylene blue and phenol molecules: Kinetics, mechanism and stability

Haseena, S.; Shanavas, S.; Ahamad, Tansir; Alshehri, Saad M.; Baskaran, P.; Duraimurugan, J.; Acevedo, R.; Khan, M.A. Majeed; Anbarasan, P. M.; Jayamani, N.

doi:10.1016/j.jece.2020.104996

Cited by 23 publications

(6 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The discoloration of the MB dye in aqueous solutions containing the nanoparticulate synthesized with bitter, sweet, and bitter/sweet latex was determined to be 79%, 84%, and 75%, where the best performance was attributed to the coexistence of different ionized oxygen vacancies defects found in the teetotum-like ZnO nanocrystals. Our results proved that using bitter Amapá, sweet The chemical species O •− 2 and HO • interact with the MB organic molecules leading to their destruction, where the final byproducts are expected to be H 2 O and CO 2 molecules [44,45]. Therefore, our ZnO nanocrystals were effective for the destruction of MB dye molecules in an aqueous solution under visible light.…”

Section: Discussionsupporting

confidence: 60%

See 1 more Smart Citation

Evaluation of the Photocatalytic Activity of Distinctive-Shaped ZnO Nanocrystals Synthesized Using Latex of Different Plants Native to the Amazon Rainforest

et al. 2022

View full text Add to dashboard Cite

ZnO nanocrystals with three different morphologies have been synthesized via a simple sol-gel-based method using Brosimum parinarioides (bitter Amapá) and Parahancornia amapa (sweet Amapá) latex as chelating agents. X-ray diffraction (XRD) and electron diffraction patterns (SAED) patterns showed the ZnO nanocrystals were a pure hexagonal wurtzite phase of ZnO. XRD-based spherical harmonics predictions and HRTEM images depicted that the nanocrystallites constitute pitanga-like (~15.8 nm), teetotum-like (~16.8 nm), and cambuci-like (~22.2 nm) shapes for the samples synthesized using bitter Amapá, sweet Amapá, and bitter/sweet Amapá chelating agent, respectively. The band gap luminescence was observed at ~2.67–2.79 eV along with several structural defect-related, blue emissions at 468–474 nm (VO, VZn, Zni), green emissions positioned at 513.89–515.89 (h-), and orange emission at 600.78 nm (–). The best MB dye removal efficiency (85%) was mainly ascribed to the unique shape and oxygen vacancy defects found in the teetotum-like ZnO nanocrystals. Thus, the bitter Amapá and sweet Amapá latex are effective chelating agents for synthesizing distinctive-shaped ZnO nanocrystals with highly defective and remarkable photocatalytic activity.

show abstract

Section: Discussionsupporting

confidence: 60%

“…•− and HO • interact with the MB organic molecules leading to their destruction, where the final byproducts are expected to be H 2 O and CO 2 molecules [44,45]. Therefore, our ZnO nanocrystals were effective for the destruction of MB dye molecules in an aqueous solution under visible light.…”

Section: Resultsmentioning

confidence: 93%

Evaluation of the Photocatalytic Activity of Distinctive-Shaped ZnO Nanocrystals Synthesized Using Latex of Different Plants Native to the Amazon Rainforest

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Under visible light, BFDW absorbs energy to surpass its Eg = 2.2 eV, triggering redox reactions that lead to the mineralization of MB dye molecules. For this purpose, the electrons move from the VB to the CB, resulting in the creation of the charge carriers (e − /h + ), as demonstrated in Equation ( 10) [126,127]. Quickly, the charge carriers arrive at the surface of BFDW, where they react with O2 and H2O molecules to give rise to the reactive chemical species Additionally, specific structural properties of BFDW can influence the photocatalytic process.…”

Section: Probable Mechanism Of the Photocatalytic Activity Of Bfdwmentioning

confidence: 99%

Associating Physical and Photocatalytic Properties of Recyclable and Reusable Blast Furnace Dust Waste

Chaves,

Lima,

Monteiro

et al. 2024

Materials

View full text Add to dashboard Cite

Blast furnace dust waste (BFDW) proved efficient as a photocatalyst for the decolorization of methylene blue (MB) dye in water. Structural analysis unequivocally identified α-Fe2O3 as the predominant phase, constituting approximately 92%, with a porous surface showcasing unique 10–30 nm agglomerated nanoparticles. Chemical and thermal analyses indicated surface-bound water and carbonate molecules, with the main phase’s thermal stability up to 900 °C. Electrical conductivity analysis revealed charge transfer resistance values of 616.4 Ω and electrode resistance of 47.8 Ω. The Mott-Schottky analysis identified α-Fe2O3 as an n-type semiconductor with a flat band potential of 0.181 V vs. Ag/AgCl and a donor density of 1.45 × 1015 cm−3. The 2.2 eV optical bandgap and luminescence stem from α-Fe2O3 and weak ferromagnetism arises from structural defects and surface effects. With a 74% photocatalytic efficiency, stable through three photodegradation cycles, BFDW outperforms comparable waste materials in MB degradation mediated by visible light. The elemental trapping experiment exposed hydroxyl radicals (OH•) and superoxide anions (O2−•) as the primary species in the photodegradation process. Consequently, iron oxide-based BFDW emerges as an environmentally friendly alternative for wastewater treatment, underscoring the pivotal role of its unique physical properties in the photocatalytic process.

show abstract

“… Frequently cited antihypertensive medicinal plants. (a) Moringa stenopetala [ 50 ]. (b) Thymus Schimperi [ 51 ].…”

Section: Figurementioning

confidence: 99%

Traditional Herbal Remedies in the Management of Metabolic Disorders in Ethiopia: A Systematic Review of Ethnobotanical Studies and Pharmacological Activities

Tola

Ibrahim

Melak

et al. 2023

Evidence-Based Complementary and Alternative Medicine

View full text Add to dashboard Cite

Background. MetS are common throughout the world, including Ethiopia. These have traditionally been treated using medicinal plants, particularly in rural areas where they are freely accessible. This systematic review tried to investigate the treatment of MetS with Ethiopian medicinal herbs and made recommendations for more validation research. A careful analysis of the literature was also conducted on the therapeutic effects of these and other Ethiopian medicinal plants with hepatoprotective and antihypertensive activities. Methods. The relevant keywords “Ethnomedicinal + hypertension,” “Ethnopharmacological + hypertension,” “Ethnomedicinal + hepatitis, jaundices, and liver disease,” “Ethnopharmacological + hepatic disorder,” and “Ethnomedicinal + weight loss” were used to search for relevant articles in the major electronic scientific databases, including PubMed, Science Direct, Web of Science, and Google Scholar. The search strategy included all articles with descriptions that were accessible until April 30, 2022. The study’s subjects, methods, or year of publication were no restrictions in the search. The outcomes were compiled using descriptive statistics. Results. Fifty-four (54) studies were examined in the review that satisfied the inclusion and exclusion criteria for the treatment of MetS in Ethiopia. The most often used ethnobotanical plant species for the treatment of hypertension and hepatic disorders were Moringa stenopetala and Croton macrostachyus. Both hepatic and hypertensive disorders were treated more frequently with leaves (52% and 39%, respectively) than with roots (20% and 13%, respectively). Some intriguing studies came from an ethnobotanical investigation into medicinal herbs’ hepatoprotective and antihypertensive properties. The most often investigated medicinal plant for its antihypertensive effects is Moringa stenopetala. Conclusion. The study revealed that Ethiopians often use anti-MetS herbal remedies. We advocate the experimental validation of the commonly used medicinal plants with the identification of active compounds and the development of effective alternative drugs for the treatment of MetS.

show abstract

Investigation on photocatalytic activity of bio-treated α-Fe2O3 nanoparticles using Phyllanthus niruri and Moringa stenopetala leaf extract against methylene blue and phenol molecules: Kinetics, mechanism and stability

Cited by 23 publications

References 59 publications

Evaluation of the Photocatalytic Activity of Distinctive-Shaped ZnO Nanocrystals Synthesized Using Latex of Different Plants Native to the Amazon Rainforest

Evaluation of the Photocatalytic Activity of Distinctive-Shaped ZnO Nanocrystals Synthesized Using Latex of Different Plants Native to the Amazon Rainforest

Associating Physical and Photocatalytic Properties of Recyclable and Reusable Blast Furnace Dust Waste

Traditional Herbal Remedies in the Management of Metabolic Disorders in Ethiopia: A Systematic Review of Ethnobotanical Studies and Pharmacological Activities

Contact Info

Product

Resources

About