Facile one-step synthesis of TiO2/Ag/SnO2 ternary heterostructures with enhanced visible light photocatalytic activity

this work reveals a green combustion route for the synthesis of tio 2 , fe 2 o 3 and tio 2 -fe 2 o 3 nanocomposites as photocatalysts for decolorization of titan Yellow (tY) and Methyl orange (Mo) dyes at room temperature in aqueous solution concentration of 20 ppm under UV-light irradiation. We observed that the tio 2 -fe 2 o 3 nanocomposite shows superior photocatalytic activity for tY dye compared to pure tio 2 and fe 2 o 3 . Rate constant (k) values of tio 2 , fe 2 o 3 and tio 2 -fe 2 o 3 for tY and Mo are 0.0194, 0.0159, 0.04396 and 0.00931, 0.00772 0.0119 kmin −1 respectively. the surface area and pore volume of tio 2 -fe 2 o 3 nanocomposite were found to be 71.56 m 2 /g and 0.076 cm 3 /g, respectively as revealed by Bet studies. from the Barrett-Joyner-Halenda (BJH) plot, the mean pore diameter of tio 2fe 2 o 3 nanoparticles was found to be 2.43 nm. Further, the TiO 2 -fe 2 o 3 nanocomposite showed good electrochemical behavior as an electrode material for supercapacitors when compared to pure tio 2 and fe 2 o 3 nanoparticles resulted in stable electrochemical performance with nearly 100% coulombic efficiency at a scan rate of 10 mV/s for 1000 cycles. Interestingly, the novelty of this work is that the designed supercapacitors showed stable electrochemical performance even at 1000 th cycle, which might be useful for rechargeable supercapacitor applications. the electrochemical properties of the nanocomposites were compared by the data obtained by cyclic voltammograms, charge-discharge tests and electrochemical impedance spectroscopic studies. these results demonstrated that the tio 2fe 2 o 3 nanocomposite showed stable performance compared to tio 2 and fe 2 o 3 nanoparticles at current density of 5 Ag −1 .Recently electrochemical studies have gained significant attention due to energy and environment related issues. Since the discovery of TiO 2 and its applications as photo-anode for battery, splitting of water, supercapacitor, dye removal etc 1 ., many different metal oxides and electrodes have been explored to enhance the energy conversion efficiency. Amongst a variety of semiconductor metal oxides, hematite (α-Fe 2 O 3 ) was found to be a good anode material for supercapacitor application, which could be attributed to its high solar-to-hydrogen efficiency, encouraging optical band gap (~2 eV), outstanding chemical strength as well as ease of availability in the nature. However, α-Fe 2 O 3 exhibits low experimental performance compared with the theoretical values, which is possibly due to poor conducting and oxygen evolution properties in addition to short whole diffusion length. To overcome these problems, various synthetic methods have been tried in the recent past, to improve the experimental performance of α-Fe 2 O 3 .But, solution-based combustion method is a simple, low cost, energy saving, easy to control the surface morphology and particle size 2 . In addition, the materials prepared in this method are organic solvent free as we used water as solvent 3-5 .

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“…Fe 2 O 3 nanoparticles ability to remove MO dye was found to be 38.67% as shown in Fig. 8 [33][34][35][36] .…”

Section: Decolorization Of Titan Yellow (Ty) Andmentioning

confidence: 92%

Enhanced photocatalytic and electrochemical performance of TiO2-Fe2O3 nanocomposite: Its applications in dye decolorization and as supercapacitors

Kumar¹,

Abebe

Nagaswarupa

et al. 2020

Sci Rep

110

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“…[37] reported the decomposition of toluene under UV and visible light irradiation by SnO 2 /rutile-TiO 2 /anatase-TiO 2 heterojunctions modified by Pt nanoparticles. Meanwhile, Zhang et al [38] studied on novel TiO 2 /Ag/SnO 2 ternary composite with enhanced visible light photocatalytic activity for MB.…”

Section: Introductionmentioning

confidence: 99%

Template Based Synthesis of Plasmonic Ag‐modified TiO₂/SnO₂ Nanotubes with Enhanced Photostability for Efficient Visible‐Light Photocatalytic H₂ Evolution and RhB Degradation

Fakharian-Qomi

Sadeghzadeh‐Attar

2020

ChemistrySelect

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In the present study, ternary photocatalysts of Ag-modified hybrid TiO 2 /SnO 2 nanotube with varied Ag contents were synthesized by the liquid-phase deposition method. The morphology, crystal structure and optical properties of ternary photocatalysts have been investigated in detail and compared with those of SnO 2 , TiO 2 , and TiO 2 /SnO 2 nanotubes. The photocatalytic activity of the products has also been evaluated based on the degradation of Rhodamine B and H 2 production under visible-light irradiation. It was found that photostable 0.4 Ag-TiO 2 /SnO 2 nanotubes exhibit the highest photocatalytic H 2 production rate of 1304.8 μmol.h À 1 .g À 1 with the maximum apparent quantum yield (AQY) of 6.3%. The improvement in H 2 evolution rate and photodegradation efficiency can be attributed to the synergetic effect of SnO 2 coupling with TiO 2 nanotubes and Ag modification, mainly owning to enlarged light absorption region, efficient separation of charge carriers in hybrid nanotubes, and localization of surface plasmon resonance of Ag nanoparticles.

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“…Whereas, the heterogeneous photocatalysis has proven to be more appealing than its homogeneous counterpart due to the manipulation of the bandgap and enhancement of charge carrier separation. [6][7][8][9] Thus, tailoring the physicochemical and optical properties of TiO 2 is indispensable in utilizing a large fraction of the solar spectrum to realize the photocatalyst's indoor applications.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of Ni–Ag–rutile TiO₂ ternary nanocomposite for efficient visible-light-driven photocatalytic activity

et al. 2020

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Facile one-step synthesis of TiO2/Ag/SnO2 ternary heterostructures with enhanced visible light photocatalytic activity

Cited by 72 publications

References 51 publications

Enhanced photocatalytic and electrochemical performance of TiO2-Fe2O3 nanocomposite: Its applications in dye decolorization and as supercapacitors

Enhanced photocatalytic and electrochemical performance of TiO2-Fe2O3 nanocomposite: Its applications in dye decolorization and as supercapacitors

Template Based Synthesis of Plasmonic Ag‐modified TiO₂/SnO₂ Nanotubes with Enhanced Photostability for Efficient Visible‐Light Photocatalytic H₂ Evolution and RhB Degradation

Synergistic effect of Ni–Ag–rutile TiO₂ ternary nanocomposite for efficient visible-light-driven photocatalytic activity

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Facile one-step synthesis of TiO2/Ag/SnO2 ternary heterostructures with enhanced visible light photocatalytic activity

Cited by 72 publications

References 51 publications

Enhanced photocatalytic and electrochemical performance of TiO2-Fe2O3 nanocomposite: Its applications in dye decolorization and as supercapacitors

Enhanced photocatalytic and electrochemical performance of TiO2-Fe2O3 nanocomposite: Its applications in dye decolorization and as supercapacitors

Template Based Synthesis of Plasmonic Ag‐modified TiO2/SnO2 Nanotubes with Enhanced Photostability for Efficient Visible‐Light Photocatalytic H2 Evolution and RhB Degradation

Synergistic effect of Ni–Ag–rutile TiO2 ternary nanocomposite for efficient visible-light-driven photocatalytic activity

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Template Based Synthesis of Plasmonic Ag‐modified TiO₂/SnO₂ Nanotubes with Enhanced Photostability for Efficient Visible‐Light Photocatalytic H₂ Evolution and RhB Degradation

Synergistic effect of Ni–Ag–rutile TiO₂ ternary nanocomposite for efficient visible-light-driven photocatalytic activity