Interfacial interaction of plasmonic nanoparticles (Ag, Au) decorated floweret TiO2 nanorod hybrids for enhanced visible light driven photocatalytic activity

Bamola, Priyanka; Sharma, Mohit; Dwivedi, Charu; Singh, Bharti; Ramakrishna, Seeram; Dalapati, Goutam Kumar; Sharma, Himani

doi:10.1016/j.mseb.2021.115403

Cited by 26 publications

(10 citation statements)

References 35 publications

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“…This shift is due to the phonon confinement effect of Ag and defects present in BiVO 4 structures. 48,49 It is obvious that the Ag content decreases the intensity of bending vibrations. 50…”

Section: Raman Spectroscopymentioning

confidence: 99%

Simultaneous elimination of toxic dyes, ciprofloxacin and Cr(vi) contents from polluted water: escalating surface plasmon electrons of Ag cocatalysts on BiVO₄ microstructures

Abid,

Ilyas,

Rafiq

et al. 2023

Environ. Sci.: Water Res. Technol.

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Section: Raman Spectroscopymentioning

confidence: 99%

Simultaneous elimination of toxic dyes, ciprofloxacin and Cr(vi) contents from polluted water: escalating surface plasmon electrons of Ag cocatalysts on BiVO₄ microstructures

Abid,

Ilyas,

Rafiq

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…In 2D-1D WS 2 /TiO 2 heterostructures the enhancement in the photocatalytic property arises mainly from the migration of holes and electrons at the interfaces of the prepared photocatalyst. [20,40] Because the conduction band edge potential of TiO 2 is higher than that of WS 2 , the photoinduced electrons on the WS 2 surfaces could readily transfer to TiO 2 through a well-built interface. [40,41] The photoinduced holes however would accumulate in WS 2 , as its valance band is higher than that of TiO 2 .…”

Section: Photocatalytic Studies Of Ws 2 and 2d-1d Ws 2 /Tio 2 And 2d-...mentioning

confidence: 99%

“…Although the WS 2 alone can also be excited under visible light, its charge recombination rate would be too fast, due to its narrow energy gap. [40,44] Therefore, if the content of WS 2 in the 2D-1D WS 2 /TiO 2 composite were increased, many of the photoinduced holes [17,40] and electrons would recombine readily on the surface of WS 2 . Also, form graph (Figure 8) it is suggested that the percentage of MB degradation is directly related to the irradiation time, which means degradation increases with increasing irradiation time.…”

Section: Photocatalytic Studies Of Ws 2 and 2d-1d Ws 2 /Tio 2 And 2d-...mentioning

confidence: 99%

Enhanced Photocatalytic Activity in 2D‐1D WS₂/TiO₂ and 2D‐2D MoS₂/WS₂ Heterosystems

Aswal,

Bamola,

Rani

et al. 2023

ChemistrySelect

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Two‐dimensional (2D) tungsten disulphide (WS2) based heterostructures with modified interfaces have huge potential for photocatalytic applications. Integrating WS2 with one‐dimensional (1D) titanium dioxide (TiO2) and 2D molybdenum disulphide (MoS2) structures to form heterostructures, enhances its photocatalytic activity. The enrichment in photocatalytic activity of heterostructures may get affected by the electronic interaction at the interface as well as morphology and dimensionality also affect the catalytic activity. In this context, the present work focuses on the enrichment of photocatalytic activity by different tungsten disulphide (WS2) based heterostructures, which may get influenced by the interfacial interaction. In the present work, two different heterostructures 2D‐1D WS2/TiO2 and 2D‐2D MoS2/WS2 are formed using the hydrothermal method. Scanning electron microscopy (SEM) confirmed the morphology of prepared heterostructures. X‐ray photoelectron spectroscopy (XPS) analysis further revealed that the integration of 1D and 2D nanostructures with WS2 has been found effective to alter the interface by the development of the Ohmic and Schottky barrier. Moreover, Fourier transformation infra‐red (FTIR) spectroscopy confirms the presence of W−S, S−S, Mo−S, and Ti−O bonds in the prepared heterostructures. Furthermore, current‐voltage (I–V) data graphically illustrated the conductivity of catalysts. I–V curves confirm the presence of Schottky and ohmic barriers and the higher electrical conductivity of 2D‐2D MoS2/WS2 heterostructures, which facilitates the charge carrier's transportation. 2D‐1D WS2/TiO2 and 2D‐2D MoS2/WS2 heterostructures are further explored for photocatalytic activity by the methylene blue dye degradation. The overall catalytic activity of 2D‐2D MoS2/WS2 is better than 2D‐1D WS2/TiO2 and WS2, respectively. This result was accounted as 2D‐2D MoS2/WS2 had the highest conductivity and better charge separation at the interface in comparison to the other two synthesised catalysts.

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“…Therefore, it is necessary to modify TiO 2 to improve its photocatalytic performance. Ion doping, semiconductor coupling and noble metal decoration are common modification methods [ 24 , 25 , 26 ]. Feng et al [ 14 ] prepared Fe/N co-doped nano-TiO 2 using the solvothermal method and the degradation degree of RhB increased from 57.4% (pure TiO 2 ) to 96.2% after irradiation for 60 min.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, owing to the surface plasmon resonance effect, noble metal modification can enhance the absorption in the visible light region, advancing the photocatalytic performance [ 31 , 32 , 33 ]. Bamola et al [ 26 ] prepared Au-TiO 2 using an inert gas evaporation method and it was found that Au and TiO 2 formed Schottky junctions which favored the separation of photogenerated electrons and holes, inhibiting the recombination of carriers. Meanwhile, the absorption of composite materials in the visible light region was enhanced by Au decoration, which promoted the photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ag Modification on the Structure and Photocatalytic Performance of TiO2/Muscovite Composites

et al. 2023

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Ag/TiO2/muscovite (ATM) composites were prepared by the sol–gel method and the effects of Ag modification on the structure and photocatalytic performance were investigated. The photocatalysts were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller surface area (BET), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (FTIR), photoluminescence spectra (PL) and ultraviolet–visible diffuse reflectance spectra (DRS). The photocatalytic activity of the obtained composites was evaluated by taking 100 mL (10 mg/L) of Rhodamine B (RhB) aqueous solution as the target pollutant. The muscovite (Mus) loading releases the agglomeration of TiO2 particles and the specific surface area increases from 17.6 m2/g (pure TiO2) to 39.5 m2/g (TiO2/Mus). The first-order reaction rate constant increases from 0.0009 min−1 (pure TiO2) to 0.0074 min−1 (150%TiO2/Mus). Ag element exists in elemental silver. The specific surface area of 1-ATM further increases to 66.5 m2/g. Ag modification promotes the separation of photogenerated electrons and holes and increases the visible light absorption. 1%Ag-TiO2/Mus (1-ATM) exhibits the highest photocatalytic activity. After 100 min, the rhodamine B (RhB) degradation degrees of PT, 150%TiO2/Mus and 1-ATM are 10.4%, 48.6% and 90.6%, respectively. The first-order reaction rate constant of 1-ATM reaches 0.0225 min−1, which is 25 times higher than that of pure TiO2.

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Interfacial interaction of plasmonic nanoparticles (Ag, Au) decorated floweret TiO2 nanorod hybrids for enhanced visible light driven photocatalytic activity

Cited by 26 publications

References 35 publications

Simultaneous elimination of toxic dyes, ciprofloxacin and Cr(vi) contents from polluted water: escalating surface plasmon electrons of Ag cocatalysts on BiVO₄ microstructures

Simultaneous elimination of toxic dyes, ciprofloxacin and Cr(vi) contents from polluted water: escalating surface plasmon electrons of Ag cocatalysts on BiVO₄ microstructures

Enhanced Photocatalytic Activity in 2D‐1D WS₂/TiO₂ and 2D‐2D MoS₂/WS₂ Heterosystems

Effect of Ag Modification on the Structure and Photocatalytic Performance of TiO2/Muscovite Composites

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Interfacial interaction of plasmonic nanoparticles (Ag, Au) decorated floweret TiO2 nanorod hybrids for enhanced visible light driven photocatalytic activity

Cited by 26 publications

References 35 publications

Simultaneous elimination of toxic dyes, ciprofloxacin and Cr(vi) contents from polluted water: escalating surface plasmon electrons of Ag cocatalysts on BiVO4 microstructures

Simultaneous elimination of toxic dyes, ciprofloxacin and Cr(vi) contents from polluted water: escalating surface plasmon electrons of Ag cocatalysts on BiVO4 microstructures

Enhanced Photocatalytic Activity in 2D‐1D WS2/TiO2 and 2D‐2D MoS2/WS2 Heterosystems

Effect of Ag Modification on the Structure and Photocatalytic Performance of TiO2/Muscovite Composites

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Simultaneous elimination of toxic dyes, ciprofloxacin and Cr(vi) contents from polluted water: escalating surface plasmon electrons of Ag cocatalysts on BiVO₄ microstructures

Simultaneous elimination of toxic dyes, ciprofloxacin and Cr(vi) contents from polluted water: escalating surface plasmon electrons of Ag cocatalysts on BiVO₄ microstructures

Enhanced Photocatalytic Activity in 2D‐1D WS₂/TiO₂ and 2D‐2D MoS₂/WS₂ Heterosystems