Immobilizing CuO/BiVO4 nanocomposite on PDA-templated cotton fabric for visible light photocatalysis, antimicrobial activity and UV protection

Ran, Jianhua; Chen, Hongbo; Bai, Xue; Bi, Sheng; Jiang, Huiyu; Cai, Guangming; Cheng, Deshan; Wang, Xin

doi:10.1016/j.apsusc.2019.07.137

Cited by 71 publications

(26 citation statements)

References 59 publications

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“…The antibacterial effect of the cotton fabrics functionalized with the zein particles, with and without ellagic acid, observed for E. coli was similar to the effect described for other antimicrobial textiles developed [55][56][57][58][59][60][61]. However, for S. aureus the antibacterial effect presented by the textiles was lower when compared to the values reported in other works [62].…”

Section: Antimicrobial Activitysupporting

confidence: 84%

Zein impart hydrophobic and antimicrobial properties to cotton textiles

Gonçalves

Torres

Silva

et al. 2020

Reactive and Functional Polymers

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In this work, zein, a by-product of the agricultural industry of corn, was used to impart hydrophobicity and antimicrobial activity to textiles. The cotton textiles were functionalized with zein in two different forms, free or as particles. The optimized coating conditions which rendered the highest hydrophobic character to the textiles were found to be 50 g/L zein in the free form prepared with 70% ethanol. To enhance the antimicrobial activity of the coated textiles, ellagic acid was encapsulated into the zein particles. These presented stable diameters, between 300 and 450 nm, and positive surface charge revealing high encapsulation efficiency. After textiles coating, the controlled release of ellagic acid was tested against different mimetic biologic solutions. The release profile was dependent on the ethanol concentration, on the sweat solution pH and on the external media used during dialysis. The functionalized textiles revealed differentiated antimicrobial activity against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive). For E. coli the activity was mainly related with the action of zein while for S. aureus a combined effect between the protein and the ellagic acid was observed. The results herein presented pave the way for the development of new zein-based products for a wide range of applications.

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Section: Antimicrobial Activitysupporting

confidence: 84%

Zein impart hydrophobic and antimicrobial properties to cotton textiles

Gonçalves

Torres

Silva

et al. 2020

Reactive and Functional Polymers

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“…Advanced oxidation processes (AOPs) based on semiconductor photocatalysts are recognized to remove, through mineralization, organic pollutants in low concentrations, including emergent organic dyes [4,5], pesticides [6,7], pharmaceutical compounds [8,9], etc. The economic factor is usually considered very relevant, as AOPs are energy-intensive [10,11], especially due to the most commonly employed UV activation [12][13][14]. Until now, many papers have reported the use of AOPs especially based on composites [15,16], semiconductors [17][18][19], or hybrid systems [20,21].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Light Irradiation on the Photocatalytic Degradation of Organic Pollutants

Eneşca

Isac

2020

Materials

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The design of a photocatalytic process must consider intrinsic and extrinsic parameters affecting its overall efficiency. This study aims to outline the importance of balancing several factors, such as radiation source, total irradiance, photon flux, catalyst substrate, and pollutant type in order to optimize the photocatalytic efficiency. Titanium oxide was deposed by the doctor blade technique on three substrates (microscopic glass (G), flour-doped tin oxide (FTO), and aluminum (Al)), and the photocatalytic properties of the samples were tested on two pollutants (tartrazine (Tr) and acetamiprid (Apd)). Seven irradiation scenarios were tested using different ratios of UV-A, UV-B + C, and Vis radiations. The results indicated that the presence of a conductive substrate and a suitable ratio of UV-A and Vis radiations could increase the photocatalytic efficiency of the samples. Higher efficiencies were obtained for the sample Ti_FTO (58.3% for Tr and 70.8% for Apd) and the sample Ti_Al (63.8% for Tr and 82.3% for Apd) using a mixture of three UV-A and one Vis sources (13.5 W/m2 and 41.85 μmol/(m2·s)). A kinetic evaluation revealed two different mechanisms of reaction: (a) a one-interval mechanism related to Apd removal by Ti_FTO, Ti_Al (scenarios 1, 4, 5, and 7), and Ti_G samples (scenario 7) and (b) a two-interval mechanism in all other cases.

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“…PDA‐coated cotton fabric served as support to deposit CuO/BiVO 4 . First, Bi(NO 3 ) 3 in HNO 3 solution was mixed with NH 4 VO 3 and incubated at (pH 5, 130 °C, 24 h) then the yellow powder formed was mixed with Cu(NO 3 ) 2 dispersed in water resulting in CuO/BiVO 4 nanocomposite with a 1 : 9 ratio . The suspension of this material was then mixed with PDA/cotton (oscillating bath, 24 h).…”

Section: Removal Of Toxic Materialsmentioning

confidence: 99%

Polydopamine – its Prolific Use as Catalyst and Support Material

Molnár

2020

ChemCatChem

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Polydopamine is a mussel-inspired functional material with a unique ability to form surface coatings. It is a green, environmentally benign product available very easily for a multitude of varied applications. This review attempts to collect useful information with respect to polydopamine-based catalytic studies with the use of polydopamine and modified polydopamine preparations loaded with varied catalytically active species including metal ions and metal particles. Major sections are about the use of polydopamine as catalyst material, utilization of immobilized enzymes, removal of toxic materials, results in organic synthesis, and fuel cell applications. A few examples of chiral catalysis and results of recycling studies are also treated. Data collected and analyzed indicate the importance and high potential of polydopamine-based catalysts in sustainable chemistry. of subunits attacked by an immobilized cyclohexeneamine (5) was suggested to be the transition state of CÀ C bond formation.Edouard et al. prepared catalyst 0.29 % PDA/PU by depositing PDA onto polyurethane foam (PU, 180 � 20 mg, 8 cm 3 ) and used it for the reduction of methylene blue (MB) with NaBH 4 . [48] Activities decreased gradually with repeated uses from 100 % to 35 % in run 11 but partial reactivation was achieved upon keeping the sample at 67°C for 8 h (55 % dropping below 10 % in run 13). Exposure to air at room temperature for six days proved to be somewhat more beneficial (90 % conversion in run 14 decreasing to 48 % in run 18). In a recent study they fabricated two oxidized PDA/PU samples and then loaded them with NaBH 4 . [49] One made by the usual method (dopamine/Tris, rt, 12 h, in air; sample PDA O2 PU), whereas the other was made by treating PU in a mixture of dopamine, NaOAc, and NaIO 4 (pH 5, rt, 24 h). The sample was dried (67°C) and washed thoroughly with water (PDA NaIO4 PU). Both products were dipped into an aqueous solution of NaBH 4 (0.1 M, 10 min) to afford boron contents of 2.37 and 2.11 wt%. The catalysts tested in the degradation of MB showed high activities with efficiencies of 97 % and 98 %, respectively (NaBH 4 /MB molar ratio 40, 177 mg and 209 mg catalysts, 25 min). During five reuses, the pH of the reaction medium increased because of boron loss (0.78 wt% and 0.81 wt%). The activity of PDA NaIO4 PU decreased to 89 % in run five. However, dipping the used sample into a 0.1 M NaBH 4 solution restored the original efficiency of 98 %. This, however, was only a temporary remedy, since a low efficiency of 60 % was measured in run 10. PDA was suggested by the authors to act as a redox mediator to prevent the hydrolysis/oxidation of immobilized borohydride.This formula (5) should be moved up and placed before the paragraph starting with "Edouard et al…"The Zuo group used PDA particles (avg. diameter 240 nm) to induce the reduction of MB and rhodamine B (RhB) with NaBH 4 . [50] Quinone moieties of PDA were assumed to channel electrons from NaBH 4 to the dyes. Indeed, PDA oxidized with NaIO 4 exhibited increased degradatio...

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Immobilizing CuO/BiVO4 nanocomposite on PDA-templated cotton fabric for visible light photocatalysis, antimicrobial activity and UV protection

Cited by 71 publications

References 59 publications

Zein impart hydrophobic and antimicrobial properties to cotton textiles

Zein impart hydrophobic and antimicrobial properties to cotton textiles

The Influence of Light Irradiation on the Photocatalytic Degradation of Organic Pollutants

Polydopamine – its Prolific Use as Catalyst and Support Material

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