Method for polychlorinated biphenyls removal from mussels and its photocatalytic dechlorination

Nadarajan, Renugambaal; Bakar, Wan Azelee Wan Abu; Ali, Rusmidah; Ismail, Razali

doi:10.1016/j.apcatb.2017.06.066

Cited by 12 publications

(4 citation statements)

References 59 publications

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“…Figure 3h clearly shows the formation of mainly bigger particles of oxides containing ZnO nanorods. This also supports the fact of the existence of well separated polycrystalline phases in the layer [1,16,19].…”

Section: Edx Mappingsupporting

confidence: 83%

“…It should to be noted that the formation of semi-solid PVC layer is very important as over-drying would lead to leaching of the catalyst as the catalyst would not be completely held on the film. The dried composite was further dried at 95 °C for 1 h to remove any moisture [7,16]. The prepared composite was labelled as PVC@ZnNR/TiNW.…”

Section: Preparation Of Pvc Supported Zno/tio2mentioning

confidence: 99%

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Highly Stable Photocatalytic Removal of Paraquat Dichloride using ZnO/TiO2 supported on PVC

Ashiru¹,

Matmin²,

Toemen

2021

Mal. J. Fund. Appl. Sci.

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This study presents on ZnO/TiO2 supported on PVC (ZnO/TiO2@PVC) in the photocatalytic removal of paraquat dichloride. The ZnO/TiO2@PVC was characterized using XRD, FESEM-EDX, FTIR, and AFM. Findings indicated that ZnO/TiO2@PVC allowed degradation of paraquat dichloride under UV irradiation by the rate of up to 73%. XRD pattern indicated the presence of both TiO2(anatase) and ZnO (zincite) crystalline as well as PVC amorphous structures. FESEM and AFM results revealed the observed shape and surface of TiO2 interconnected nanowires with ZnO nanorods uniformly distributed according to EDX mapping. The reduced surface roughness was also shown in the supported photocatalyst. FTIR analysis clearly demonstrate the combined spectra of immobilised ZnO/TiO2 powder catalyst onto the PVC in the composite. Kinetic study of the degradation process was performed according to pseudo-first-order and the influence of ZnO/TiO2 coating onto PVC polymer and initial paraquat concentration were investigated on the treatment performance. Under optimized condition (pH = 7, PQ =20 mg/L and catalyst coating =15%), the stability and reusability of the supported catalyst was also evaluated over ten sequential treatment runs, and the catalyst maintain high reactivity. High recyclability of the ZnO/TiO2@PVC composites as catalyst in photodegradation processes are also reported in this study.

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Section: Edx Mappingsupporting

confidence: 83%

Section: Preparation Of Pvc Supported Zno/tio2mentioning

confidence: 99%

Highly Stable Photocatalytic Removal of Paraquat Dichloride using ZnO/TiO2 supported on PVC

Ashiru¹,

Matmin²,

Toemen

2021

Mal. J. Fund. Appl. Sci.

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“…Coordinated NH3 molecules bound to Lewis acid sites are thermally more stable than NH4 + ions bound to Brønsted acid sites, and thus need higher temperatures to desorb. Therefore, the low-temperature desorption peak observed for CoAl2O4 sample (282 ºC) is assigned to NH 4+ ions bound to Brønsted acid sites, while the high-temperature desorption peak of 70Al30Co sample (808 ºC) is associated with molecular NH3 adsorbed on Lewis acid sites [31,32,35]. Interestingly, the ball milling method has a major effect on the acidic properties.…”

Section: Textural and Structural Characterizationmentioning

confidence: 97%

“…NH3-TPD was performed to investigate the surface acid sites amount and strength of the spinel; the profiles are displayed in Figure 4b. NH3 desorption peaks centred at temperatures lower than 400 °C are assigned to weak acid sites, while those centred at temperatures higher than 600 °C originate from strong acid sites [31][32][33][34].…”

Section: Textural and Structural Characterizationmentioning

confidence: 99%