Visible-light plasmonic photocatalyst anchored on titanate nanotubes: a novel nanohybrid with synergistic effects of adsorption and degradation

Tang, Yuxin; Jiang, Zhelong; Tay, Qiuling; Deng, Jiyang; Lai, Yuekun; Gong, Dangguo; Dong, Zhili

doi:10.1039/c2ra21300a

Cited by 73 publications

(44 citation statements)

References 50 publications

(63 reference statements)

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“…This is in accordance with the conclusions of previous reports that under light illumination AgX (X=Cl, Br, I) partially decomposes to Ag and thus stabilizes 4. 16 The sample exhibits a good photostability and no conversion rate decrease was observed after three recycle stages, therefore, the AgI photocatalyst can be reused without regeneration.…”

Section: Phase Composition and Specific Surface Area Of Ag2o@tnts Ansupporting

confidence: 92%

Visible‐Light‐Induced Selective Photocatalytic Oxidation of Benzylamine into Imine over Supported Ag/AgI Photocatalysts

Zheng

Chen

et al. 2014

ChemCatChem

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Titanate nanotubes (TNT) supported AgI nanoparticles were prepared by a two‐step method: the deposition of Ag2O on titanate nanotubes from AgNO3 solution and the subsequent I‐adsorption process from NaI solution. It is found that the supported AgI samples exhibited excellent photoactivity for the selective oxidation of benzylamine to the corresponding imine under visible light illumination and the photocatalyst can be used for many times without apparent activity loss. X‐ray diffraction studies, transmission electron microscopy, diffuse reflectance UV‐Vis spectroscopy and nitrogen adsorption measurements were used for the characterization of the as‐prepared and recycled AgI samples. It is found that under visible light irradiation, AgI partially decomposed to produce Ag/AgI nanostructure and thus stabilized. The photoactivity of supported Ag/AgI for the selective oxidation of benzylamine was studied in terms of the light intensity, wavelength, temperature and substituent. It is proposed that the formation of plasmonic Ag nanoparticles should be responsible for the high activity and selectivity.

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Section: Phase Composition and Specific Surface Area Of Ag2o@tnts Ansupporting

confidence: 92%

Visible‐Light‐Induced Selective Photocatalytic Oxidation of Benzylamine into Imine over Supported Ag/AgI Photocatalysts

Zheng

Chen

et al. 2014

ChemCatChem

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“…[49] The transition occurs at pH 4.1, which is similar to the point of zero charge of other titanate materials. [21,24,50,51] In the present work, we focus on positively charged TiONWs, so the samples were adjusted to pH 3.0 throughout the experiments. As shown in Table 1, the nanowire dispersions have a positive electrophoretic mobility under these conditions, corresponding to a z-potential of 21.6 mV obtained by conversion of the mobility value to potential by using the classical Smoluchowski theory.…”

Section: With a Relatively Low Polydispersitymentioning

confidence: 99%

Dispersion Characteristics and Aggregation in Titanate Nanowire Colloids

et al. 2014

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Titanate nanowires (TiONWs) are synthesized through the hydrothermal method and characterized in acidic aqueous dispersions by using electrophoresis, dynamic light scattering, and atomic force microscopy. The TiONWs have a rodlike shape with an average length of about 600 nm and a thickness of 35 nm. They are positively charged under the conditions used. Their surface charge properties and aggregation are investigated in the presence of oppositely charged poly(styrene sulfonate) (PSS) polyelectrolyte. Charge neutralization followed by a subsequent charge reversal process is observed, which is attributed to the adsorption of PSS. The colloids are unstable near the charge neutralization point and stable at lower and higher PSS doses, in good qualitative agreement with the theory developed by Derjaguin, Landau, Verwey, and Overbeek (DLVO). The nanowires prefer to align along the walls, leading to “spaghetti‐like” oriented aggregates. The aggregation processes of bare and PSS‐coated TiONWs are monitored at different concentrations of an inert electrolyte; slow aggregation is found at low salt levels, whereas aggregation is rapid beyond the critical coagulation concentration, as predicted by the DLVO theory, which describes the colloid stability of the TiONWs adequately in all the systems investigated. Coating of the nanowires with the polyelectrolyte leads to a critical coagulation concentration 75 times higher than that of the bare titanates, indicating the enormous stabilizing effect of PSS.

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“…The Ag-AgX-titanate nanotubes (Ag-AgX-TNT) hybrid with a high surface area could synergistically adsorb and degrade methylene blue under visible light [77].…”

Section: Noble Metal Based Multifunctional Nanosized Heterostructuresmentioning

confidence: 99%

Nanocomposite materials for photocatalytic degradation of pollutants

et al. 2017

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Visible-light plasmonic photocatalyst anchored on titanate nanotubes: a novel nanohybrid with synergistic effects of adsorption and degradation

Cited by 73 publications

References 50 publications

Visible‐Light‐Induced Selective Photocatalytic Oxidation of Benzylamine into Imine over Supported Ag/AgI Photocatalysts

Visible‐Light‐Induced Selective Photocatalytic Oxidation of Benzylamine into Imine over Supported Ag/AgI Photocatalysts

Dispersion Characteristics and Aggregation in Titanate Nanowire Colloids

Nanocomposite materials for photocatalytic degradation of pollutants

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