Two-dimensional MoS2 nanosheet-modified oxygen defect-rich TiO2 nanoparticles for light emission and photocatalytic applications

Improvements in the charge transfer interface and efficient light utilization have proven to be essential parameters for the superior performance of heterostructure-based photocatalysis. In the present study, 2D MoS(2)nanosheet-modified oxygen defect-rich anatase TiO(2)nanostructures were developed...

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Veröffentlicht in:New journal of chemistry 2020-09, Vol.44 (35), p.14936-14946
Hauptverfasser: Singh, Jaspal, Soni, R. K.
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description Improvements in the charge transfer interface and efficient light utilization have proven to be essential parameters for the superior performance of heterostructure-based photocatalysis. In the present study, 2D MoS(2)nanosheet-modified oxygen defect-rich anatase TiO(2)nanostructures were developed by the hydrothermal method. Elemental mapping and transmission electron microscopy studies affirmed the functionalization of 2D MoS(2)nanosheets with TiO(2)nanoparticles. Raman spectroscopy and XRD studies confirmed the formation of the MoS2-TiO(2)heterojunction. UV-DRS studies exhibited improved visible light absorption and significant bandgap narrowing in TiO(2)nanostructures with the modification of 2D MoS(2)nanosheets. PL results also displayed an improvement in the charge separation and reduction in the recombination rate in MoS2-modified TiO2. White light emission PL was achieved through modulation in the defect concentration of TiO(2)with the attachment of MoS(2)nanosheets. MoS2-modified TiO(2)nanostructures showed remarkable photodegradation nature for methylene blue (MB) dye degradation under sunlight. The most efficient MoS2-modified TiO(2)decomposed 98.3% of MB, 84.7% of oxytetracycline hydrochloride (OTC-HCl) and 80% of methyl orange (MO) molecule solution in just 12 minutes, 50 minutes and 30 minutes, respectively, under sunlight. The enhanced photolysis performance of MoS2-TiO(2)nanohybrids can be ascribed to the efficient light utilization and synergistic effects among the MoS(2)and defect-rich TiO(2)nanoparticles.
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K.</creator><creatorcontrib>Singh, Jaspal ; Soni, R. K.</creatorcontrib><description>Improvements in the charge transfer interface and efficient light utilization have proven to be essential parameters for the superior performance of heterostructure-based photocatalysis. In the present study, 2D MoS(2)nanosheet-modified oxygen defect-rich anatase TiO(2)nanostructures were developed by the hydrothermal method. Elemental mapping and transmission electron microscopy studies affirmed the functionalization of 2D MoS(2)nanosheets with TiO(2)nanoparticles. Raman spectroscopy and XRD studies confirmed the formation of the MoS2-TiO(2)heterojunction. UV-DRS studies exhibited improved visible light absorption and significant bandgap narrowing in TiO(2)nanostructures with the modification of 2D MoS(2)nanosheets. PL results also displayed an improvement in the charge separation and reduction in the recombination rate in MoS2-modified TiO2. White light emission PL was achieved through modulation in the defect concentration of TiO(2)with the attachment of MoS(2)nanosheets. MoS2-modified TiO(2)nanostructures showed remarkable photodegradation nature for methylene blue (MB) dye degradation under sunlight. The most efficient MoS2-modified TiO(2)decomposed 98.3% of MB, 84.7% of oxytetracycline hydrochloride (OTC-HCl) and 80% of methyl orange (MO) molecule solution in just 12 minutes, 50 minutes and 30 minutes, respectively, under sunlight. 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K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Two-dimensional MoS2 nanosheet-modified oxygen defect-rich TiO2 nanoparticles for light emission and photocatalytic applications</atitle><jtitle>New journal of chemistry</jtitle><stitle>NEW J CHEM</stitle><date>2020-09-21</date><risdate>2020</risdate><volume>44</volume><issue>35</issue><spage>14936</spage><epage>14946</epage><pages>14936-14946</pages><issn>1144-0546</issn><eissn>1369-9261</eissn><abstract>Improvements in the charge transfer interface and efficient light utilization have proven to be essential parameters for the superior performance of heterostructure-based photocatalysis. In the present study, 2D MoS(2)nanosheet-modified oxygen defect-rich anatase TiO(2)nanostructures were developed by the hydrothermal method. Elemental mapping and transmission electron microscopy studies affirmed the functionalization of 2D MoS(2)nanosheets with TiO(2)nanoparticles. 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source Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection
subjects Anatase
Charge transfer
Chemistry
Chemistry, Multidisciplinary
Defects
Dyes
Electromagnetic absorption
Heterojunctions
Heterostructures
Light emission
Mapping
Methylene blue
Molybdenum disulfide
Nanoparticles
Nanosheets
Nanostructure
Oxytetracycline
Photocatalysis
Photodegradation
Photolysis
Physical Sciences
Raman spectroscopy
Science & Technology
Sunlight
Titanium dioxide
White light
title Two-dimensional MoS2 nanosheet-modified oxygen defect-rich TiO2 nanoparticles for light emission and photocatalytic applications
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