Mechanistic insight of dye degradation using TiO2 anchored α-MnO2 nanorods as promising sunlight driven photocatalyst

Ullah, Ata; Rahman, Lutfur; Hussain, Syed Zajif; Abbas, Wasim; Tawab, Abdul; Jilani, Asim; Bajwa, Sadia Z.; Khan, Waheed S.; Riaz, Rabia; Hussain, Irshad; Rehman, Asma

doi:10.1016/j.mseb.2021.115257

Cited by 23 publications

(15 citation statements)

References 38 publications

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“…Other crop plants use the foliar amino acid application to boost biomass and photosynthetic activity [55,56]. Glutamic acid is also bolstered in the protection and preservation of yield production and also biological characteristics in the environment [7]. Chelating agents such as lysine, glycine, and glutamic acid assist in the retention of plant yield and photosynthetic pigments [29,57,58].…”

Section: Discussionmentioning

confidence: 99%

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Microwave Irradiation and Glutamic Acid-Assisted Phytotreatment of Textile and Surgical Industrial Wastewater by Sorghum

et al. 2022

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We investigated how different doses of microwave irradiation (MR) affect seed germination in Sorghum, including the level of remediation against textile and surgical wastewater (WW) by modulating biochemical and morpho-physiological mechanisms under glutamic acid (GA) application. The experiment was conducted to determine the impact of foliar-applied GA on Sorghum under wastewater conditions. Plants were treated with or without microwave irradiation (30 s, 2.45 GHz), GA (5 and 10 mM), and wastewater (0, 25, 50, and 100). Growth and photosynthetic pigments were significantly decreased in plants only treated with various concentrations of WW. GA significantly improved the plant growth characteristics both in MR-treated and -untreated plants compared with respective controls. HMs stress increased electrolyte leakage (EL), hydrogen peroxide (H2O2), and malondialdehyde (MDA) content; however, the GA chelation significantly improved the antioxidant enzymes activities such as ascorbate oxidase (APX), superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) both in MR-treated and -untreated plants under WW stress compared with respective controls. The results suggested that the MR-treated plants accumulate higher levels of HMs under GA addition in comparison to the WW-only-treated and MR-untreated plants. The maximum increase in Cd accumulation was observed in the range of 14–629% in the roots, 15–2964% in the stems, and 26–4020% in the leaves; the accumulation of Cu was 18–2757% in the roots, 15–4506% in the stems, and 23–4605% in the leaves; and the accumulation of Pb was 13–4122% in the roots, 21–3588% in the stems, and 21–4990% in the leaves under 10 mM GA and MR-treated plants. These findings confirmed that MR-treated sorghum plants had a higher capacity for HMs uptake under GA and could be used as a potential candidate for wastewater treatment.

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Section: Discussionmentioning

confidence: 99%

“…The level of HMs in arable land seems not consistently high, but when treated with wastewater, the HMs content increases. All of these contaminants are potentially damaging to the water quality [7]. Consequently, it has a substantial negative impact on all life forms [8].…”

Section: Introductionmentioning

confidence: 99%

Microwave Irradiation and Glutamic Acid-Assisted Phytotreatment of Textile and Surgical Industrial Wastewater by Sorghum

et al. 2022

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“… 8 , 9 Although these dyes are chemically resistant and carcinogenic, they are still excessively used for different purposes, such as paint, cosmetics, textiles, food, pharmaceuticals, and pulp industries, which are considered the main source of organic dyes. 8 , 10 , 11 Removal of dyes from water systems is extremely desirable for a healthy environment. 10 Generally, organic pollutants and toxic contaminants are stable and hard to remove or degrade by traditional biochemical treatment.…”

Section: Introductionmentioning

confidence: 99%

“… 8 , 10 , 11 Removal of dyes from water systems is extremely desirable for a healthy environment. 10 Generally, organic pollutants and toxic contaminants are stable and hard to remove or degrade by traditional biochemical treatment. Recently, various technologies have been proposed for the remediation of pollutants, such as adsorption, oxidation process, photocatalysis, ion exchange process, metal–organic framework (MOF), and biodegradation.…”

Section: Introductionmentioning

confidence: 99%

“… 18 , 19 Among them, photocatalysis is considered a green and facile suitable technology for treating contaminated water. 7 , 10 , 15 , 20 − 29 The synthesis of high-performance heterogeneous photocatalysis has become one of the most popular research areas, as this method is eco-friendly, low-cost, and highly effective. 30 − 35 In addition, this method may lead to the degradation of organic/inorganic contaminants into harmless components.…”

Section: Introductionmentioning

confidence: 99%

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Direct Z-Scheme AgBr/β-MnO₂Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity

Warshagha

Danish

2022

ACS Omega

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The preparation of visible light-responsive efficient photocatalysts for removing organic contaminants from water and killing cancer cells has gotten a lot of attention due to the growing global concern. In this study, we have successfully fabricated an efficient AgBr/β-MnO 2 nanocomposite via a facile deposition and precipitation method at room temperature. Techniques such as XRD, SEM-EDS, TEM, DRS, PL, EIS, ESR, and FTIR were used to determine the crystalline, structural, morphological, optical, and other properties. The SEM and TEM analyses reveal that AgBr NPs are decorated on the surface of β-MnO 2 , which possesses rods with a sphere-like structure for AgBr/β-MnO 2 . The EDX analysis confirms the existence of Mn, O, Ag, and Br elements in the nanocomposites without an extra peak, indicating that the synthesized samples are highly pure. The high photocatalytic performance of AgBr/β-MnO 2 could be attributed to the formation of Ag NPs and the construction of the Z-scheme heterojunction between AgBr and β-MnO 2 . This may enhance fast light absorption and efficient photogenerated (e–/h+) pairs, as indicated by EIS and photoluminescence measurements, which in turn achieved high activity for the decomposition of MB (97%, in 12 min), RhB (98.9%, in 9 min), and paracetamol (80%, in 180 min), respectively. The kinetic model study proposed that the first-order model showed a better fit than the zero- and second-order for the photocatalytic decolorization of RhB dye. XRD analysis of 0.2 AgBr/β-MnO 2 before and after recycling confirms the high stability of the catalyst. HPLC results showed that no detectable by-products are produced through the decomposition of paracetamol. Interestingly, 0.2 AgBr/β-MnO 2 nanocomposites showed visible light-induced anticancer activity against A549 cancer cell lines. The mechanistic degradation pathway has been proposed using the involvement of active species like superoxide radicals ( −• O 2 ) and photoinduced holes (h + ). The proposed work focuses on synthesizing effective photocatalysts in a less hazardous environment with superior biological activity.

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Polyethylene glycol dictates the therapeutic response (anticancer and wound healing) of silver oxide nanomaterials

Abbas

Javed

Jamil

et al. 2023

Polymers for Advanced Techs

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In this study, polymer (polyethylene glycol [PEG] and Chitosan)‐coated silver oxide nanoparticles (NPs) have been prepared by hydrothermal method. The polymer‐encapsulated NPs are characterized by materials‐related characterization techniques such as X‐Ray diffraction (XRD), scanning electron microscope (SEM), Ultraviolet–visible (UV–Vis), photoluminescence (PL), and Fourier‐transform infrared (FTIR) spectroscopy. The crystallite size of silver oxide NPs is 43.39 nm and reduces to 34.56 nm and 30.43 nm for PEG and Chitosan functionalized NPs, respectively. SEM micrographs show the spherical morphology of the synthesized nanomaterials with the grain size of pristine, PEG, and Chitosan functionalized silver oxide NPs as 60.9 ± 14.1, 70.9 ± 10.3, and 57.2 ± 7.8 nm, respectively. The band gap of silver oxide NPs increases upon polymer functionalization. PEGlyation of silver oxide NPs has enhanced its anticancer potential significantly against liver cancer cell line (HuH‐7), shows least cell viability, and IC50 value is as low as 0.106 μg/mL and in the case of Chitosan coating 4.505 μg/mL. The antibacterial properties and biofilm inhibition are investigated against bacterial extracts of Escherichia coli and Staphylococcus aureus. The polymer‐coated silver oxide NPs have shown enhanced antibacterial potential against both S. aureus and E. coli. CAM assay is used to evaluate the wound‐healing ability of nanomaterials. Alginate gels incorporated with NPs have promoted wound healing. Our results revealed that the surface modification by PEG and Chitosan improved the therapeutic potential of silver oxide NPs.

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Mechanistic insight of dye degradation using TiO2 anchored α-MnO2 nanorods as promising sunlight driven photocatalyst

Cited by 23 publications

References 38 publications

Microwave Irradiation and Glutamic Acid-Assisted Phytotreatment of Textile and Surgical Industrial Wastewater by Sorghum

Microwave Irradiation and Glutamic Acid-Assisted Phytotreatment of Textile and Surgical Industrial Wastewater by Sorghum

Direct Z-Scheme AgBr/β-MnO₂Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity

Polyethylene glycol dictates the therapeutic response (anticancer and wound healing) of silver oxide nanomaterials

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Mechanistic insight of dye degradation using TiO2 anchored α-MnO2 nanorods as promising sunlight driven photocatalyst

Cited by 23 publications

References 38 publications

Microwave Irradiation and Glutamic Acid-Assisted Phytotreatment of Textile and Surgical Industrial Wastewater by Sorghum

Microwave Irradiation and Glutamic Acid-Assisted Phytotreatment of Textile and Surgical Industrial Wastewater by Sorghum

Direct Z-Scheme AgBr/β-MnO2Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity

Polyethylene glycol dictates the therapeutic response (anticancer and wound healing) of silver oxide nanomaterials

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Product

Resources

About

Direct Z-Scheme AgBr/β-MnO₂Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity