Preparation and visible light photocatalytic performance of methylene blue intercalated K4Nb6O17

Qu, Wenwu; Chen, Feng; Zhao, Bin; Zhang, Jinlong

doi:10.1016/j.jpcs.2009.10.005

Cited by 15 publications

(6 citation statements)

References 30 publications

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“…The stability was further confirmed by TG-DSC data for three samples (Fig. S2), the total mass losses were 7.3%, 6.8%, and 7.2%, respectively, in accordance with the theoretical value of amount of 7.6 wt% for K 4 Nb 6 O 17 ·4.5H 2 O [40,41]. After photoreduction of Cr(VI), there appeared a slight decrease in mass loss, which is owing to partial replacement of K + by Cr 3+ ions.…”

Section: Investigation On the Recyclability Of The As-prepared Samplessupporting

confidence: 74%

“…1a, the product became a pure crystalline K 4 Nb 6 O 17 ·4.5H 2 O. Further increasing KOH concentration up to 0.75 mol L −1 led to a well crystalline K 4 Nb 6 O 17 ·4.5H 2 O, which was assigned to an orthorhombic phase (JCPDS 21-1296) [29,31]. Obviously, the initial KOH concentration is one of the key factors for synthesizing pure phase K 4 Nb 6 O 17 ·4.5H 2 O.…”

Section: Resultsmentioning

confidence: 99%

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K4Nb6O17·4.5H2O: A novel dual functional material with quick photoreduction of Cr(VI) and high adsorptive capacity of Cr(III)

Liu

et al. 2014

Journal of Hazardous Materials

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Section: Investigation On the Recyclability Of The As-prepared Samplessupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

K4Nb6O17·4.5H2O: A novel dual functional material with quick photoreduction of Cr(VI) and high adsorptive capacity of Cr(III)

Liu

et al. 2014

Journal of Hazardous Materials

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“…This may be explained by the fact that the excited state gets destabilized when the molecules are embedded between negatively charged layers. This leads to larger HOMO-LUMO separation, hence a higher excitation energy46. The effect seems less pronounced for ST, maybe due to the proposed weaker interaction between ST and the thiostannate.…”

Section: Resultsmentioning

confidence: 95%

Light absorption engineering of a hybrid (Sn3S72−)n based semiconductor – from violet to red light absorption

Hvid

Lamagni

Lock

2017

Sci Rep

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The crystalline two-dimensional thiostannate Sn3S7(trenH)2 [tren = tris(2-aminoethyl)amine] consists of negatively charged (Sn3S72−)n polymeric sheets with trenH+ molecular species embedded in-between. The semiconducting compound is a violet light absorber with a band gap of 3.0 eV. In this study the compound was synthesized and functionalized by introducing the cationic dyes Methylene Blue (MB) or Safranin T (ST) into the crystal structure by ion exchange. Dye capacities up to approximately 45 mg/g were obtained, leading to major changes of the light absorption properties of the dye stained material. Light absorption was observed in the entire visible light region from red to violet, the red light absorption becoming more substantial with increasing dye content. The ion exchange reaction was followed in detail by variation of solvent, temperature and dye concentration. Time-resolved studies show that the ion exchange follows pseudo-second order kinetics and a Langmuir adsorption mechanism. The pristine and dye stained compounds were characterized by powder X-ray diffraction and scanning electron microscopy revealing that the honeycomb hexagonal pore structure of the host material was maintained by performing the ion exchange in the polar organic solvent acetonitrile, while reactions in water caused a break-down of the long-range ordered structure.

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“…As an appealing approach, sensitization can widen the absorption into the visible‐light region and even a higher wavelength range so as to efficiently harvest solar energy and thus achieve the high photocatalytic efficiency. Up to now, a series of organic dye sensitizers such as MB, ruthenium complex sensitizers, Pt (II) terpyridine complex, merocyanine/coumarin dyes, quinolinium sensitizer, and coumarin and carbazole dyes were incorporated with 2D TNMOs to extend the light region for the enhanced photocatalytic activity of H 2 evolution and degradation. The combination of such organic dye sensitizers could improve the electron injection from the lowest unoccupied molecular orbital of organic dye molecules to CB of 2D TNMOs and thus effectively hinder the charge carrier recombination.…”

Section: Enhanced Photocatalytic Activity With Modificationmentioning

confidence: 99%

2D Titanium/Niobium Metal Oxide‐Based Materials for Photocatalytic Application

et al. 2020

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2D titanium/niobium (Ti/Nb) metal oxide (TNMO)‐based compounds have attracted increasing attention due to the fact that the contained octahedral structure of Ti4+‐based TiO6 and/or Nb5+‐based NbO6 can be facilely modified so as to achieve an enhanced photocatalytic performance for environmental remediation and energy conversion. Herein, the different synthetic methods for the construction of various 2D TNMO‐based photocatalysts are presented. Many basic principles, such as nanostructure design, doping, and construction of heterojunctions, are introduced to enhance the photocatalytic performance of 2D TNMO compounds. The relationship between the photocatalytic performance and regulation methods is also described. Furthermore, the photocatalytic applications of 2D TNMO‐based materials are discussed, including H2 generation, removal of pollutants, CO2 reduction, nitrogen photofixation, disinfection, and organic synthesis. Finally, the challenges and future development of 2D TNMO‐based materials are also discussed.

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Preparation and visible light photocatalytic performance of methylene blue intercalated K4Nb6O17

Cited by 15 publications

References 30 publications

K4Nb6O17·4.5H2O: A novel dual functional material with quick photoreduction of Cr(VI) and high adsorptive capacity of Cr(III)

K4Nb6O17·4.5H2O: A novel dual functional material with quick photoreduction of Cr(VI) and high adsorptive capacity of Cr(III)

Light absorption engineering of a hybrid (Sn3S72−)n based semiconductor – from violet to red light absorption

2D Titanium/Niobium Metal Oxide‐Based Materials for Photocatalytic Application

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