Efficient Degradation of Organic Pollutants by Using Dioxygen Activated by Resin‐Exchanged Iron(<scp>II</scp>) Bipyridine under Visible Irradiation

Ma, Wanhong; Li, Jing; Tao, Xia; He, Jianlong; Xu, Yiming; Yu, Jimmy C.; Zhao, Jincai

doi:10.1002/anie.200390264

Cited by 138 publications

(76 citation statements)

References 25 publications

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“…They reported the successful photodegradation of aniline after 8 h of UV illumination, but the microstructure of the TiO 2 -coated metal foam was not reported. In our attempt to investigate this microstructure, we dip-coated the inside of a metal foam with a titanium tetraisopropoxide (TTIP, Ti[OCH(CH 3 for 1 h. The nanoporous structure of the type observed for BiVO 4 is not observed for the TiO 2 and WO 3 -coated metal foam, as indicated in Fig. 7.…”

Section: (3) the Adsorption Effectmentioning

confidence: 90%

“…The oxidative removal of organic dyes is achieved by the direct decomposition of the organics by sunlight. [2][3][4] In recent years, materials consisting of metal foams have drawn much attention as substrates in heterogeneous catalysis due to their uniform anisotropic cellular structure, which confer unique mechanical and gas-dynamic properties. 5,6 In addition, metal foams are light, mechanically resistant, highly porous, and stable, and thus provide a high-contact interfacial area.…”

Section: Introductionmentioning

confidence: 99%

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Efficient Water Purification by Photocatalysis and Rapid Adsorption of Dip‐Coated Metal Foam with Nanostructured Bismuth Vanadate

et al. 2015

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Rapid removal of the organic methylene blue (MB) dye was achieved by simple stirring of highly porous Ni-Fe-Cr-Al metal foam coated with bismuth vanadate (BiVO 4 ). The metal foam was dip-coated with the BiVO 4 solution precursor and annealed for an hour, through which the foam surface was decorated with the highly porous nanostructure, yielding high adsorptivity. This bismuth-decorated metal foam was characterized by X-ray diffraction, X-ray photoelectron, and scanning electron microscopy to elucidate its physical, chemical, and morphological properties. The modeled pollutant, MB, was stirred with the metal foam both in darkness and in light. Complete decolorization was observed for both of these conditions, which indicates that adsorption dominates over photocatalysis; we found that photocatalysis contributed to less than 10% of the purification process. We also demonstrated that it would be possible to recycle the metal foam as many as 20 times, beyond which its purification capability degrades. However, the MB residues on the foam can be removed by simple annealing; thus, in theory the foam can be recycled indefinitely.

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Section: (3) the Adsorption Effectmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Efficient Water Purification by Photocatalysis and Rapid Adsorption of Dip‐Coated Metal Foam with Nanostructured Bismuth Vanadate

et al. 2015

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“…After careful decantation of upper supernatant liquid, those solid particles which were settled at the bottom of the container were kept in an electrical oven maintained at 80°C for 2 h for complete removal of solvent so that samples can be collected in powder form. To confirm the formation of Cu 2 O NPs, we added 2 mL of concentrated ammonia solution to 10 mg Cu 2 2? complex after shaking the beaker for a few seconds which indicates formation of copper(I) oxide [19].…”

Section: Experimental Synthesis Of Cu 2 O Npsmentioning

confidence: 99%

“…It is not an easy task to remove them from dye-bearing waste waters owing to their stability towards oxidizing agents [1][2][3]. Amongst the various organic dyes, methylene blue (MB)-a cationic dye mostly used in paper, rubber, and textile industry as colorants-is found in waste water [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Inquiring the photocatalytic activity of cuprous oxide nanoparticles synthesized by a green route on methylene blue dye

Behera¹,

Giri²

2016

Int J Ind Chem

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We synthesized cuprous oxide (Cu 2 O) nanoparticles (NPs) with an average crystallite size of 8.8 nm in presence of Arka (Calotropis gigantea) leaves extract. The photo-bleaching activity of Cu 2 O NPs on the aqueous methylene blue (MB) dye was studied by illumination of visible light. In the absorption spectra, a decrease in the absorption peak intensity at 665 nm of MB was observed in presence of Cu 2 O NPs. A red shift in its peak position as a function of irradiation time is suggesting that oxide particles are degrading the organic dye in an aqueous medium. In the vibration spectra, red shift in the C-H stretching band (2954, 2926, and 2855 cm -1 ) of methylene group and C-N stretching band (1343 and 1226 cm -1 ) of MB in presence of Cu 2 O NPs proposes a surface adsorption of MB over NP's surfaces. Quenching in the emission band intensity and red shifts in the peak maxima of MB in presence of Cu 2 O NPs is ascribed to the charge transfer interaction between MB and oxide NPs. A linear SternVolmer plot reveals that decrease in the emission intensity of MB dye occurs via the dynamic quenching mechanism. Synthesis of Cu 2 O NPs of various architectures using a green route could be use as an approach towards the costeffective treatment of water pollutants.

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“…b-cyclodextrin-hemin, synthesized by combining b-CD with a bioactive small molecule hemin, can also efficiently activate hydrogen peroxide to oxidize and mineralize the compounds in aqueous media at neutral pHs under ambient conditions and visible light irradiation [4]. Another important example is the activation of molecular oxygen by iron(II) bipyridine under visible light irradiation [5]. This inexpensive metal complex, when supported on resin (amberlite IRA 200), can initiate effectively the degradation of organic pollutants such as rhodamine B, malachite green, and N, N-dimethylaniline.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Organic Pollutants Under Visible Light Irradiation

2005

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Several TiO 2 -based photocatalytic systems that have considerable visible light response have been developed, such as the photodegradation of organic pollutants on sensitized TiO 2 by visible light, construction of visible-light-active novel TiO 2 photocatalysts by matrix or surface modification. In this paper, we review briefly our recent progress in the TiO 2 photocatalytic degradation of organic pollutants by visible light, some related work by other groups is also involved.

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Efficient Degradation of Organic Pollutants by Using Dioxygen Activated by Resin‐Exchanged Iron(II) Bipyridine under Visible Irradiation

Abstract: Excellent response to visible light is shown by the [FeII(bpy)3]–amberlite photocatalyst, which can effectively activate molecular oxygen in such a way as to put us one giant step nearer to our goal—the development of the ultimate green technology for decontamination [Eq. (1)].

Cited by 138 publications

References 25 publications

Efficient Water Purification by Photocatalysis and Rapid Adsorption of Dip‐Coated Metal Foam with Nanostructured Bismuth Vanadate

Efficient Water Purification by Photocatalysis and Rapid Adsorption of Dip‐Coated Metal Foam with Nanostructured Bismuth Vanadate

Inquiring the photocatalytic activity of cuprous oxide nanoparticles synthesized by a green route on methylene blue dye

Photocatalytic Degradation of Organic Pollutants Under Visible Light Irradiation

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