Hydrogen generation and degradation of trypan blue using fern-like structured silver-doped TiO<sub>2</sub>nanoparticles

Ravishankar, T. N.; Ramakrishnappa, T.; Nagabhushana, H.; Souza, Virgínia S.; Dupont, Jaı̈rton; Nagaraju, G.

doi:10.1039/c4nj01403k

Cited by 31 publications

(22 citation statements)

References 31 publications

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“…[3,4] Moreover, a good response to sunlight and high quantum conversion efficiency are also regarded as important factors in the design of photocatalysts. For example, various nanocomposites, such as TiO 2 /CdS, [8] TiO 2 /PdO, [9] TiO 2 /CuO, [10] TiO 2 /SnO x , [11] TiO 2 /WO 3 , [12] TiO 2 /graphene, [6,[13][14][15] TiO 2 /noble metal (Ag, Au, or Pt) , [16][17][18] TiO 2 -AgX [19,20] etc, have been reported with improved photocatalytic activity under visible light irradiation. [3][4][5] TiO 2 is a most widely investigated photocatalyst in the mineralization of organic pollutants as well as hydrogen generation because of its chemical stability, long-term thermodynamic stability, low cost, long-toxicity.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of nanocomposites composed of silver cyanamide and titania for improved photocatalytic hydrogen generation

Meng

Zhang

et al. 2015

Dalton Trans.

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Highly efficient composite photocatalysts composed of silver cyanamide (Ag2NCN) and anatase titania (TiO2) were fabricated through a chemical precipitation process of silver nitrate and cyanamide in TiO2 suspensions. The TiO2 nanoparticles around 15 nm were immobilized on the surface of rectangular Ag2NCN particles to form a hetero-structure, and the contents of TiO2 were varied to tune the structure and the photocatalytic performances. In comparison with single TiO2 or Ag2NCN, the TiO2/Ag2NCN nanocomposites exhibited a prominent improved photocatalytic activity in the hydrogen generation, and the hydrogen evolution rate (1494.0 μmol (g h)(-1)) was higher than most of the reported TiO2-composite photocatalysts. Based on the structure investigation, the photocatalytic mechanism of these TiO2/Ag2NCN nanocomposites was proposed. The enhanced photocatalytic activity was attributed to three points: the matched energy level between TiO2 and Ag2NCN promoted the electron-hole transfer and thus inhibited the recombination of photogenerated electrons and holes; the great electron storage capacity of metallic silver produced in the photocatalytic process also facilitated the charge separation; in addition, the expanded absorption spectrum because of the composite structure enhanced the UV and visible light response ability. These TiO2/Ag2NCN nanocomposites also presented good photocatalytic stability in the typical cycle tests. This work provided new insights into fabricating highly efficient composite photocatalysts containing silver and TiO2 for hydrogen generation.

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Section: Introductionmentioning

confidence: 99%

Fabrication of nanocomposites composed of silver cyanamide and titania for improved photocatalytic hydrogen generation

Meng

Zhang

et al. 2015

Dalton Trans.

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“…11 The SEM images of Ag doped TiO 2 nanoparticles are shown in Fig. 11 The SEM images of Ag doped TiO 2 nanoparticles are shown in Fig.…”

Section: Characterization Of Ag Doped Tio 2 Nanoparticlesmentioning

confidence: 99%

“…In Fig. 11 The same material is used for electrochemical monitoring of Cr(VI) in aqueous samples and photocatalytic degradation of Cr(VI) to Cr(III). i.e.…”

Section: Characterization Of Ag Doped Tio 2 Nanoparticlesmentioning

confidence: 99%

Electrochemical detection and photochemical detoxification of hexavalent chromium (Cr(vi)) by Ag doped TiO₂nanoparticles

et al. 2015

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We are proposing a simple, green and one pot ionothermal protocol for the synthesis of Ag doped TiO 2 nanoparticles. The prepared material was characterized by various spectroscopic techniques like P-XRD and XPS and then the electrocatalytic reduction and photocatalytic detoxification ability of the material towards Cr(VI) were explored. Amperometric studies showed a linear range from 0.1 to 3.1 mM, and limits of detection and quantification of 0.01 mM and 0.033 mM, respectively. The material also showed better photochemical reduction of Cr(VI) in sunlight compared to UV light. About 90% reduction of Cr(VI) to Cr(III) was observed in 120 min in sunlight whereas 88% reduction was obtained in UV light in the same time. The Ag doped TiO 2 nanoparticle modified glassy carbon has been used for electrochemical monitoring of Cr(VI) in natural water samples.

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“…Recently, silver nanoparticles (AgNPs) and their composite materials have been widely used in the field of catalysis, including the reduction of methyl orange, 4 methylene blue, 5,6 janus green, 7 trypan blue, 8 and 4-nitrophenol (4-NP). Recently, silver nanoparticles (AgNPs) and their composite materials have been widely used in the field of catalysis, including the reduction of methyl orange, 4 methylene blue, 5,6 janus green, 7 trypan blue, 8 and 4-nitrophenol (4-NP).…”

Section: Introductionmentioning

confidence: 99%

A study of the catalytic ability of in situ prepared AgNPs–PMAA–PVP electrospun nanofibers

et al. 2015

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The catalysis of nanomaterials is interesting and attractive. Herein, electrospinning was employed to afford poly(methyl acrylate) (PMAA)-poly(vinyl pyrrolidone) (PVP) electrospun nanofibers. Next, in situ photosynthesis resulted in the formation of a uniform assembly of silver nanoparticles (AgNPs) over the electrospun fibers, generating AgNPs-PMAA-PVP electrospun nanofibers. The as-formed AgNPs-PMAA-PVP electrospun nanofibers were utilized for investigating the catalytic reduction of 4-nitrophenol (4-NP)in the presence of NaBH 4 . For the in situ synthesis, the available light sources used included sunlight, table lamps, and 365 nm UV lamps. The results showed that the AgNPs-PMAA-PVP electrospun nanofibers could catalyze the reduction of 4-NP in the presence of NaBH 4 , generating 4-aminophenol (4-AP), therefore reducing the toxicity of 4-NP. After the use of the AgNPs-PMAA-PVP electrospun nanofibers for up to 4 cycles, the catalytic efficiency remained as high as 90%, suggesting that the noble metal/ polymeric electrospun nanofibrous catalyst is highly effective and reusable.

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Hydrogen generation and degradation of trypan blue using fern-like structured silver-doped TiO₂nanoparticles

Abstract: TiO2:Ag nanoparticles have been prepared using an ionic liquid assisted hydrothermal method, which generate 2230 μmol g−1 of hydrogen in 2.5 h.

Cited by 31 publications

References 31 publications

Fabrication of nanocomposites composed of silver cyanamide and titania for improved photocatalytic hydrogen generation

Fabrication of nanocomposites composed of silver cyanamide and titania for improved photocatalytic hydrogen generation

Electrochemical detection and photochemical detoxification of hexavalent chromium (Cr(vi)) by Ag doped TiO₂nanoparticles

A study of the catalytic ability of in situ prepared AgNPs–PMAA–PVP electrospun nanofibers

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Hydrogen generation and degradation of trypan blue using fern-like structured silver-doped TiO2nanoparticles

Abstract: TiO2:Ag nanoparticles have been prepared using an ionic liquid assisted hydrothermal method, which generate 2230 μmol g−1 of hydrogen in 2.5 h.

Cited by 31 publications

References 31 publications

Fabrication of nanocomposites composed of silver cyanamide and titania for improved photocatalytic hydrogen generation

Fabrication of nanocomposites composed of silver cyanamide and titania for improved photocatalytic hydrogen generation

Electrochemical detection and photochemical detoxification of hexavalent chromium (Cr(vi)) by Ag doped TiO2nanoparticles

A study of the catalytic ability of in situ prepared AgNPs–PMAA–PVP electrospun nanofibers

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Product

Resources

About

Hydrogen generation and degradation of trypan blue using fern-like structured silver-doped TiO₂nanoparticles

Electrochemical detection and photochemical detoxification of hexavalent chromium (Cr(vi)) by Ag doped TiO₂nanoparticles