Photocatalytic degradation in aqueous solution using quantum-sized ZnO particles supported on sepiolite

Xu, Wei; Liu, S.F.; Lü, Shixiang; Kang, Shi‐Zhao; Zhou, Ying; Zhang, H.F.

doi:10.1016/j.jcis.2010.07.052

Cited by 66 publications

(19 citation statements)

References 29 publications

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“…The optical properties of the as‐prepared samples are demonstrated in Figure . Bare BMO shows an adsorption edge at about 456 nm due to the intrinsic band‐gap transition, corresponding to an E g of around 2.72 eV calculated from the formula of E g = 1240/λ (E g is the band gap value, λ is the limiting wavelength) . As for a series of Fe (III)/BMO samples with varying quantity of Fe (III) clusters, light absorption gradually extends to a wider range of visible light wavelengths with increasing the Fe (III) content.…”

Section: Resultsmentioning

confidence: 99%

Fe (III)‐grafted Bi₂MoO₆ nanoplates for enhanced photocatalytic activities on tetracycline degradation and HMF oxidation

Xue

Huang

Zong

et al. 2019

Applied Organom Chemis

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Fe (III)-grafted Bi 2 MoO 6 nanoplates (Fe (III)/BMO) with varying small quantity of Fe (III) clusters modification were fabricated through a simple hydrothermal and impregnation process. The characterization results indicate that the modification of Fe (III) clusters on the surface of Bi 2 MoO 6 nanoplates with intimate interfacial contact is beneficial to the expansion of visible light absorption range and the separation of photoinduced carriers during the interface charge transfer process. The photocatalytic properties of the samples were studied by degradation of tetracycline (TC) and selective aerobic oxidation of biomass-derived chemical 5-hydroxymethylfuraldehyde (HMF) under visible light. The 1.5 wt% Fe (III) clusters-grafted Bi 2 MoO 6 nanoplates exhibited optimum photocatalytic activity, which is the TC degradation kinetic rate constant is 5.3 times higher than that of bare BMO, and the highest HMF conversion of 32.62% can be obtained with a selectivity of 95.30%. Furthermore, a possible visible light photocatalysis mechanism over Fe (III)/BMO sample has been proposed. This study may supply some insight for the development of visiblelight-driven Bi 2 MoO 6 -based photocatalysts applicable to both environmental remediation and biomass-derived chemical transformation.

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Section: Resultsmentioning

confidence: 99%

Fe (III)‐grafted Bi₂MoO₆ nanoplates for enhanced photocatalytic activities on tetracycline degradation and HMF oxidation

Xue

Huang

Zong

et al. 2019

Applied Organom Chemis

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“…When the content of ZnO increases the photocatalytic efficiency increases. It is due to the number of OH Á radical generation is increased (Xu et al 2010). Considering all the above facts, in this study, the optimum ratio of ZnO and CeO 2 is fixed as 4:1.…”

Section: Effect Of Operational Parametersmentioning

confidence: 96%

Enhanced photocatalytic performance of (ZnO/CeO2)-β-CD system for the effective decolorization of Rhodamine B under UV light irradiation

Velusamy¹,

Lakshmi²

2017

Appl Water Sci

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In this work, we attempt a new approach for the study on photocatalytic ability of (ZnO/CeO 2 ) improved by b-CD under UV light irradiation for the photodecolorization of RhB. The (ZnO/CeO 2 ) composite was prepared by mixing ZnO with CeO 2 in a weight ratio of 4:1. The surface interaction of (ZnO/CeO 2 ) with b-CD was determined by characterizing their structural, morphological and optical properties. The formation of an inclusion complex between RhB dye and b-CD was confirmed by UV-visible spectral analyses. The photocatalytic activity of (ZnO/CeO 2 )-b-CD system was evaluated by the decolorization of RhB dye in aqueous solution under UV light irradiation. The effects of operational parameters like the ratio of (ZnO/CeO 2 ), initial concentration of dye, catalyst dose, irradiation time and pH have been analyzed. The photocatalytic decolorization of RhB follows pseudo-first order kinetics. The mineralization of RhB has been confirmed by COD measurements. A possible mechanism for the photocatalytic decolorization of RhB by (ZnO/CeO 2 )-b-CD system under UV light irradiation was also discussed.

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“…Many TiO 2 -based composites have been developed to improve photodegradation using a sepiolite matrix: ternary heterogeneous BiOCl/TiO 2 /sepiolite composite for tetracycline degradation [15], sepiolite-TiO 2 nanocomposites for the orange G dye degradation [16], TiO 2 /sepiolite composites for the degradation of acid red G and 4-nitrophenol [17], and TiO 2 /sepiolite composites to decompose phenol [18]. Composites with other metallic oxides and hydroxides have been also synthesized for photodegradation of organic dye compounds: Sepiolite@LDH composite for simultaneous photocatalytic degradation of methyl orange (MO) and methylene blue (MB) dye [19], ternary ZnO/Fe 3 O 4 -sepiolite nanostructured material for MB dye degradation [20,21], and quantum-sized ZnO particles on sepiolite for the degradation of reactive blue 4 [22]. So far, from the above reports, sepiolite has been generally utilized as an efficient supporting material for well-known semiconductors and other types of photocatalytically active species under UV light irradiation.…”

Section: Introductionmentioning

confidence: 99%

Dye-sensitized Photocatalyst of Sepiolite for Organic Dye Degradation

2019

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The photocatalytic activity of sepiolite was examined for degradation of several dye compounds under visible light irradiation. Higher adsorption capacities and greater photocatalytic performance of cationic dyes (rhodamine B and methylene blue) were observed on sepiolite, in comparison with anionic dyes (orange II and trypan blue). Superiority in the photocatalytic activity of cationic dyes is attributed to the strong electrostatic attraction and photosensitization properties of cationic dye molecules. Sepiolite has degraded 45.3% rhodamine B within 120 min, which is the greatest photocatalytic degradation efficiency when compared with other dyes. Subsequently, the reusability of spent sepiolite after adsorption of rhodamine B was evaluated by the degradation of trypan blue under the visible light irradiation. The photocatalytic degradation performance of trypan blue by spent sepiolite after adsorption of rhodamine B increased about twice as much as with pristine sepiolite, indicating that the dye-sensitized photocatalytic process could enhance the photocatalytic degradation ability of sepiolite. Through radical scavenger tests, it was found that a superoxide radical is mainly responsible for rhodamine B degradation. The possible mechanism of rhodamine B degradation under visible light irradiation was proposed. The sepiolite could be a potential catalyst for the degradation of organic pollutants in wastewater under solar light.

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Photocatalytic degradation in aqueous solution using quantum-sized ZnO particles supported on sepiolite

Cited by 66 publications

References 29 publications

Fe (III)‐grafted Bi₂MoO₆ nanoplates for enhanced photocatalytic activities on tetracycline degradation and HMF oxidation

Fe (III)‐grafted Bi₂MoO₆ nanoplates for enhanced photocatalytic activities on tetracycline degradation and HMF oxidation

Enhanced photocatalytic performance of (ZnO/CeO2)-β-CD system for the effective decolorization of Rhodamine B under UV light irradiation

Dye-sensitized Photocatalyst of Sepiolite for Organic Dye Degradation

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Photocatalytic degradation in aqueous solution using quantum-sized ZnO particles supported on sepiolite

Cited by 66 publications

References 29 publications

Fe (III)‐grafted Bi2MoO6 nanoplates for enhanced photocatalytic activities on tetracycline degradation and HMF oxidation

Fe (III)‐grafted Bi2MoO6 nanoplates for enhanced photocatalytic activities on tetracycline degradation and HMF oxidation

Enhanced photocatalytic performance of (ZnO/CeO2)-β-CD system for the effective decolorization of Rhodamine B under UV light irradiation

Dye-sensitized Photocatalyst of Sepiolite for Organic Dye Degradation

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Product

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Fe (III)‐grafted Bi₂MoO₆ nanoplates for enhanced photocatalytic activities on tetracycline degradation and HMF oxidation

Fe (III)‐grafted Bi₂MoO₆ nanoplates for enhanced photocatalytic activities on tetracycline degradation and HMF oxidation