Innovative photocatalytic degradation of polyethylene film with boron-doped cryptomelane under UV and visible light irradiation

Liu, Guanglong; Liao, Shuijiao; Zhu, Duanwei; Yue, Hua; Zhou, Wenbing

doi:10.1016/j.cej.2012.09.105

Cited by 31 publications

(17 citation statements)

References 35 publications

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“…The modified films have a higher adsorption capacity than the PE film, in the vis region. The results are confirmed by the literature data (Liu et al 2012).…”

Section: Uv-vis Spectroscopy Of the Filmssupporting

confidence: 90%

Testing the Preservation Activity of Ag‐TiO₂‐Fe and TiO₂ Composites Included in the Polyethylene during Orange Juice Storage

Peter

Mihaly‐Cozmuta

et al. 2014

J Food Process Engineering

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Orange juice was stored in polyethylene packages containing Ag‐TiO2‐Fe or TiO2 composites to establish the extent to which these composites influence the physical‐chemical, microbiological and organoleptic characteristics of the juice. The composites were characterized in terms of structure (X‐ray diffraction, transmission electron microscopy, Fourier‐transformed infrared) and photoactivity while the packages were profiled in terms of their UV‐vis absorption and water vapor permeability. The acidity and the browning rate of the sample stored in the package with Ag‐TiO2‐Fe decreased after 10 days of storage, as compared with the sample deposited in TiO2 packages and with the reference sample (polyethylene). The microbial population in the orange juice increased after 10 days of storage in all packages, but the increase was smaller in the Ag‐TiO2‐Fe polyethylene package. The organoleptic properties of the fresh orange juice deposited in package with Ag‐TiO2‐Fe were almost identical with those of the freshly prepared sample (0 days), whereas those of the juice deposited in the reference package were unacceptable. Practical Applications The study provides evidence that the packages of polyethylene modified with Ag‐TiO2‐Fe can be used to store fresh orange juice for 10 days at room temperature (22.5C).

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“…The modified films have a higher adsorption capacity than the PE film, in the vis region. The results are confirmed by the literature data (Liu et al 2012).…”

Section: Uv-vis Spectroscopy Of the Filmssupporting

confidence: 90%

Testing the Preservation Activity of Ag‐TiO₂‐Fe and TiO₂ Composites Included in the Polyethylene during Orange Juice Storage

Peter

Mihaly‐Cozmuta

et al. 2014

J Food Process Engineering

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“…The intensity of the bands at 450, 520 and 600 cm -1 became weaker with the rise in Pd loading. This finding confirms the above results obtained in XRD investigations, which are in good agreement with the results reported by Liu et al [12] and Yang et al [13] that the band intensity of the OMS-2 decreased due to B-and Cu-doping.…”

Section: Results and Disscussionsupporting

confidence: 94%

Catalytic oxidation of carbon monoxide, toluene, and ethyl acetate over the xPd/OMS-2 catalysts: Effect of Pd loading

Fu¹,

Li²,

Song³

et al. 2017

Front. Chem. Sci. Eng.

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The Pd catalyst supported on cryptomelanetype manganese oxide octahedral molecular sieve (OMS-2) were prepared. The effect of Pd loading on the catalytic oxidation of carbon monoxide, toluene, and ethyl acetate over xPd/OMS-2 has been investigated. The results show that the Pd loading plays an important role on the physicochemical properties of the xPd/OMS-2 catalysts which outperform the Pd-free counterpart with the 0.5Pd/ OMS-2 catalyst being the best. The temperature for 50% conversion was 25, 240 and 160°C, and the temperature for 90% conversion was 55, 285 and 200°C for oxidation of CO, toluene, and ethyl acetate, respectively. The lowtemperature reducibility and high oxygen mobility of xPd/ OMS-2 are the factors contributable to the excellent catalytic performance of 0.5Pd/OMS-2.

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“…In this latter one, an ample signal was observed in the vicinity of 610 cm −1 ( Figure 8 E), corresponding to deformation in the C-OH bond [ 45 ]. The presence of (C=O) groups during plasma discharge [ 23 ] and hydroxyl (OH-) during photocatalysis suggests the existence of LDPE oxidation processes for both treatments.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, advanced oxidation processes, such as photocatalysis with TiO 2 , are a physical/chemical alternative to modify or transform different types of plastic [ 22 , 23 , 24 , 25 ]. The photocatalytic process with TiO 2 begins when the oxide semiconductor is electromagnetically irradiated (λ < 400 nm) and a photoelectron excitation takes place, where photon energy ( hv ) is absorbed by the electron in the TiO 2 valence band (VB), which causes energy transitions between the VB and the conduction band (CB) to ensue.…”

Section: Introductionmentioning

confidence: 99%

LDPE Transformation by Exposure to Sequential Low-Pressure Plasma and TiO2/UV Photocatalysis

et al. 2021

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Low-density polyethylene (LDPE) sheets (3.0 ± 0.1 cm) received sequential treatment, first by the action of direct-current low-pressure plasma (DC-LPP) with a 100% oxygen partial pressure, 3.0 × 10−2 mbar pressure, 600 V DC tension, 5.6 cm distance, 6-min treatment. Then, sheets were submitted to TiO2 photocatalysis at UV radiation at 254 nm (TiO2/UV) with a pH value of 4.5 ± 0.2 and a TiO2 concentration of 1 gL−1. We achieved a complementary effect on the transformation of LDPE films. With the first treatment, ablation was generated, which increased hydrophilicity. With the second treatment, the cavities appeared. The changes in the LDPE sheets’ hydrophobicity were measured using the static contact angle (SCA) technique. The photocatalytic degradation curve at 400 h revealed that the DC-LPP photocatalysis sequential process decreased SCA by 82°. This was achieved by the incorporation of polar groups, which increased hydrophilicity, roughness, and rigidity by 12 and 38%, respectively. These sequential processes could be employed for LDPE and other material biodegradation pretreatment.

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Innovative photocatalytic degradation of polyethylene film with boron-doped cryptomelane under UV and visible light irradiation

Cited by 31 publications

References 35 publications

Testing the Preservation Activity of Ag‐TiO₂‐Fe and TiO₂ Composites Included in the Polyethylene during Orange Juice Storage

Testing the Preservation Activity of Ag‐TiO₂‐Fe and TiO₂ Composites Included in the Polyethylene during Orange Juice Storage

Catalytic oxidation of carbon monoxide, toluene, and ethyl acetate over the xPd/OMS-2 catalysts: Effect of Pd loading

LDPE Transformation by Exposure to Sequential Low-Pressure Plasma and TiO2/UV Photocatalysis

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Innovative photocatalytic degradation of polyethylene film with boron-doped cryptomelane under UV and visible light irradiation

Cited by 31 publications

References 35 publications

Testing the Preservation Activity of Ag‐TiO2‐Fe and TiO2 Composites Included in the Polyethylene during Orange Juice Storage

Testing the Preservation Activity of Ag‐TiO2‐Fe and TiO2 Composites Included in the Polyethylene during Orange Juice Storage

Catalytic oxidation of carbon monoxide, toluene, and ethyl acetate over the xPd/OMS-2 catalysts: Effect of Pd loading

LDPE Transformation by Exposure to Sequential Low-Pressure Plasma and TiO2/UV Photocatalysis

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Testing the Preservation Activity of Ag‐TiO₂‐Fe and TiO₂ Composites Included in the Polyethylene during Orange Juice Storage

Testing the Preservation Activity of Ag‐TiO₂‐Fe and TiO₂ Composites Included in the Polyethylene during Orange Juice Storage