Enhanced TiO2 photocatalytic degradation of bisphenol E by β-cyclodextrin in suspended solutions

Wang, Guanghui; Wu, Feng; Zhang, Xu; Luo, Mingbiao; Deng, Nansheng

doi:10.1016/j.jhazmat.2005.09.058

Cited by 71 publications

(39 citation statements)

References 15 publications

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“…5) (Zhang et al 2011). An electron is rapidly injected from the excited RhB to the conduction band (Hoffmann et al 1995;Macwan et al 2011;Zhang et al 2009;Wang et al 2006a). The enhancement of photocatalytic decoloration of RhB mainly resulted in the enhanced adsorption of RhB on MO surface and moderate inclusion depth of RhB in the b-CD cavity.…”

Section: Determination Of Codmentioning

confidence: 99%

Enhanced photocatalytic activity of metal oxides/β-cyclodextrin nanocomposites for decoloration of Rhodamine B dye under solar light irradiation

Subramanian¹,

Pitchaimuthu²,

Kannan³

et al. 2014

Appl Water Sci

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We present the photocatalytic decoloration of Rhodamine B (RhB) dye with the nanocomposites such as TiO 2 , ZnO, TiO 2 /b-cyclodextrin (b-CD) and ZnO/b-CD. Band gap energy of nanocomposites was calculated by UV-DRS analysis and the results showed that the band gap energy of ZnO/b-CD nanocomposite is lower than that of other catalysts. The microstructures of the nanocomposites have been characterized by PXRD and FE-SEM analyses. The results showed that crystallinity and surface morphology of metal oxides (MO) (say, TiO 2 and ZnO) are not changed in MO/b-CD nanocomposite systems. GC-MS results showed that the photocatalytic decoloration of RhB follows the steps such as N-deethylation, cleavage of chromophore and mineralization of dye.Keywords RhB Á TiO 2 Á ZnO Á TiO 2 /b-CD Á ZnO/b-CD

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Section: Determination Of Codmentioning

confidence: 99%

Enhanced photocatalytic activity of metal oxides/β-cyclodextrin nanocomposites for decoloration of Rhodamine B dye under solar light irradiation

Subramanian¹,

Pitchaimuthu²,

Kannan³

et al. 2014

Appl Water Sci

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“…In this work, b-CD acts as a bridge or channel between the RhB and both the metal oxides, as b-CD can include the dye molecule into its cavity and adsorbed onto the surfaces of both the metal oxides and accumulate at higher concentrations, which makes the decolorization of RhB more easy and effective in the presence of hydroxyl radicals produced during photocatalytic decolorization processes (Wang et al 2006b). Therefore, the photocatalytic activity of (ZnO/CeO 2 )-b-CD is enhanced by decreasing the recombination of electron-hole pairs which results in the increasing the lifetime of charge carriers and formation of more number of hydroxide and superoxide radicals.…”

Section: Effect Of Phmentioning

confidence: 99%

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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“…Moreover, the crystal structure of the annealed TiO 2 with Ag NPs, annealed TiO 2 deposited with the Ag NPs, and of the graphene layer, were also first annealing treatment was at 380°C for 1 h. Because the PLLA supplies electrons and acts as reducing agent, the silver ions in the CH 3 COOAg were reduced to silver metal particles. During the second annealing at 500°C for 1 h, the amorphous phase of titania nanotubes was transformed to anatase-type crystalline structure.…”

Section: Characteristics Of the Rgo/ag/tio 2 Nt Compositementioning

confidence: 99%

“…A self-organized TiO 2 nanotube (NT) has been widely considered one of the most promising photocatalysts because of its functional properties [1,2], which include high photocatalytic activity, photo-stability and non-toxicity [3,4]. Moreover, the TiO 2 nano-tubular architectures can be precisely controlled by the titanium anodizing process.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic performance of graphene/Ag/TiO₂hybrid nanocomposites

Lee¹,

Kim²,

Cho³

et al. 2015

Carbon letters

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To improve photocatalytic efficiency, graphene/Ag/TiO 2 nanotube catalyst was synthesized, and its surface characteristics and photocatalytic activity investigated. For deposition of Ag nanoparticles on the TiO 2 nanotubes, a polymer compound containing CH 3 COOAg/poly(Llactide) was utilized, and the silver particles were precipitated by reducing the silver ions during the annealing process. Graphene deposition on the Ag/TiO 2 nanotubes was achieved using an electrophoretic deposition process. Based on the dye degradation results, it was determined that the photocatalytic efficiency was significantly affected by deposition of silver particles and graphene on the TiO 2 catalyst. Highly efficient destruction of the dye was obtained with the new graphene/Ag/TiO 2 nanotube photocatalyst. This may be attributed to a synergistic effect of the graphene and Ag nanoparticles on the TiO 2 nanotubes.

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Enhanced TiO2 photocatalytic degradation of bisphenol E by β-cyclodextrin in suspended solutions

Cited by 71 publications

References 15 publications

Enhanced photocatalytic activity of metal oxides/β-cyclodextrin nanocomposites for decoloration of Rhodamine B dye under solar light irradiation

Enhanced photocatalytic activity of metal oxides/β-cyclodextrin nanocomposites for decoloration of Rhodamine B dye under solar light irradiation

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

Photocatalytic performance of graphene/Ag/TiO₂hybrid nanocomposites

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Enhanced TiO2 photocatalytic degradation of bisphenol E by β-cyclodextrin in suspended solutions

Cited by 71 publications

References 15 publications

Enhanced photocatalytic activity of metal oxides/β-cyclodextrin nanocomposites for decoloration of Rhodamine B dye under solar light irradiation

Enhanced photocatalytic activity of metal oxides/β-cyclodextrin nanocomposites for decoloration of Rhodamine B dye under solar light irradiation

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

Photocatalytic performance of graphene/Ag/TiO2hybrid nanocomposites

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Photocatalytic performance of graphene/Ag/TiO₂hybrid nanocomposites