Enhanced photocatalytic activity of multi-doped TiO2 for the degradation of methyl orange

Charanpahari, Archana; Umare, Suresh S.; Gokhale, Suresh; Sudarsan, V.; Sreedhar, B.; Sasikala, R.

doi:10.1016/j.apcata.2012.07.032

Cited by 81 publications

(17 citation statements)

References 45 publications

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“…Therefore, it is necessary and urgent to make substantive efforts to develop new photocatalysts, which have a response to visible light and show a relatively high efficiency of degradation. In general, the majority of visible light-driven catalysts in previous research could mainly be classified into two types: one kind is called the TiO 2 -based catalyst, whose maximum absorption wavelength had been extended to visible light by ion doping [11,12,13,14,15,16,17,18,19,20] and cocatalyst recombination [21,22,23,24,25,26,27,28,29,30,31]; the other one is a multiple complex oxide, such as BiVO 4 , Bi 12 TiO 20 , K 6 Nb 10.8 O 30 , etc. [32,33,34,35,36,37,38].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Photocatalytic Activity of New Photocatalyst ZnBiSbO4 under Visible Light Irradiation

Luan

Chen

2014

IJMS

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In this paper, ZnBiSbO4 was synthesized by a solid-state reaction method for the first time. The structural and photocatalytic properties of ZnBiSbO4 had been characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, transmission electron microscope and UV-visible spectrometer. ZnBiSbO4 crystallized with a pyrochlore-type structure and a tetragonal crystal system. The band gap of ZnBiSbO4 was estimated to be 2.49 eV. The photocatalytic degradation of indigo carmine was realized under visible light irradiation with ZnBiSbO4 as a catalyst compared with nitrogen-doped TiO2 (N-TiO2) and CdBiYO4. The results showed that ZnBiSbO4 owned higher photocatalytic activity compared with N-TiO2 or CdBiYO4 for the photocatalytic degradation of indigo carmine under visible light irradiation. The reduction of the total organic carbon, the formation of inorganic products, SO42− and NO3−, and the evolution of CO2 revealed the continuous mineralization of indigo carmine during the photocatalytic process. One possible photocatalytic degradation pathway of indigo carmine was obtained. The phytotoxicity of the photocatalytic-treated indigo carmine (IC) wastewater was detected by examining its effect on seed germination and growth.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Photocatalytic Activity of New Photocatalyst ZnBiSbO4 under Visible Light Irradiation

Luan

Chen

2014

IJMS

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“…The doping concentration of Nb at 1.7% was optimal because the values of both short‐circuit current density and open‐circuit voltage were increased and hence device efficiency was better as compared to other doping concentrations. However, during sintering, the formation of amorphous phase of TiO 2 was more preferred due to low melting temperature of Nb‐doped TiO 2 nanoparticles. In 2017, Qu et al reported that when TiO 2 was doped with Gd 3+ , the crystallite size of TiO 2 decreased and the contact area involved in photocatalytic activity increased, this caused the amount of absorbed ‐OH group to increase and consequently dye loading capacity of the photoanode was better as compared to undoped TiO 2 . Authors also reported that Gd 3+ proved to be a good potential candidate for doping as it helped to protect the injected electrons from recombination with the electrolyte and also increased the efficiency of DSSCs because Gd 3+ ion act as down‐converting medium and transforms UV light into visible light by enhancing visible light absorption in luminescence process …”

Section: Re‐doped Tio2 For Spectral Conversionmentioning

confidence: 99%

A review on spectral converting nanomaterials as a photoanode layer in dye‐sensitized solar cells with implementation in energy storage devices

et al. 2020

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The present review article aims at the application of rare-earth-based titanium dioxide nanocrystals as spectral converters in photovoltaic devices, with special focus on dye-sensitized solar cells (DSSCs). Additionally, the implementation of DSSCs in energy storage, more importantly, DSSCs and lithium-ion batteries (LIB) integrated devices are systematically described. The absorption in DSSCs is mainly confined to the visible solar spectrum, which is one of the main reasons behind its limited power conversion efficiency. This has led to shifting of research focus on broadening the light absorption range of DSSCs, which can further lead to enhancement in overall power conversion efficiency. TiO 2 , doped with rare-earth (RE) ions, is often used as an electron transport layer (ETL) in DSSCs to overcome this absorption-related issue. This article gives a detailed review of TiO 2 doped with different RE ions, as an electron transport layer in DSSCs. More importantly, we have summarized all the recent important findings with the application of DSSCs in LIB and photocapacitors. K E Y W O R D S DSSCs, efficiency, electron transport layer, energy storage, photovoltaics, rare-earth 1 | OBJECTIVES • The main objective of this review article is to provide an overview of TiO 2 -based photoanode layer used in dye-sensitized solar cells (DSSCs).

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“…[11] Composite semiconductors are also a good method to improve the photocatalytic activity of TiO 2 . Kim et al [12] reported that the high photocatalytic activity of a Zr/TiO 2 /SiO 2 photocatalyst could be attributed to the large specific surface area and strong absorption in the visible light region.…”

Section: Introductionmentioning

confidence: 99%

“…The levels introduced by F merge with the valence band of TiO 2 whereas the states introduced by Fe are placed near the middle of the band gap of TiO 2 . Thus, a low concentration co-doping of cations and anions can effectively narrow the band gap thus enhancing the visible light absorption efficiency [11]. The optical band gap can be deduced from the equation for a crystalline semiconductor, ahn D A(hn -E g ) n/2 , where a, n, E g , and A are the absorption coefficient, light frequency, band gap, and a constant, respectively.…”

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confidence: 99%

Photocatalytic degradation of formaldehyde by nanostructured TiO₂composite films

Zhang

Song

Guan

et al. 2015

Journal of Experimental Nanoscience

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Interest in the photocatalytic oxidation of formaldehyde from contaminated wastewater is growing rapidly. The photocatalytic activity of the nanocrystalline Fe 3C /F ¡ co-doped TiO 2 ÀSiO 2 composite film for the degradation of formaldehyde solution under visible light was discussed in this study. The films were characterised by field emission scanning electron microscopy (FE-SEM) equipped with energy-dispersive spectroscopy, X-ray diffraction (XRD), BET surface area, UVÀVis absorption spectroscopy, and photoluminescence spectroscopy. The FE-SEM results revealed that the Fe 3C /F ¡ co-doped TiO 2 ÀSiO 2 film was composed of uniform round-like nanoparticles or aggregates with the size range of 5À10 nm. The XRD results indicated that only the anatase phase was observed in the film. Compared with a pure TiO 2 film and a singly modified TiO 2 film, the Fe 3C /F ¡ co-doped TiO 2 ÀSiO 2 composite film showed the best photocatalytic properties due to its strong visible light adsorption and diminished electrons-holes recombination.

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Enhanced photocatalytic activity of multi-doped TiO2 for the degradation of methyl orange

Cited by 81 publications

References 45 publications

Synthesis, Characterization and Photocatalytic Activity of New Photocatalyst ZnBiSbO4 under Visible Light Irradiation

Synthesis, Characterization and Photocatalytic Activity of New Photocatalyst ZnBiSbO4 under Visible Light Irradiation

A review on spectral converting nanomaterials as a photoanode layer in dye‐sensitized solar cells with implementation in energy storage devices

Photocatalytic degradation of formaldehyde by nanostructured TiO₂composite films

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Enhanced photocatalytic activity of multi-doped TiO2 for the degradation of methyl orange

Cited by 81 publications

References 45 publications

Synthesis, Characterization and Photocatalytic Activity of New Photocatalyst ZnBiSbO4 under Visible Light Irradiation

Synthesis, Characterization and Photocatalytic Activity of New Photocatalyst ZnBiSbO4 under Visible Light Irradiation

A review on spectral converting nanomaterials as a photoanode layer in dye‐sensitized solar cells with implementation in energy storage devices

Photocatalytic degradation of formaldehyde by nanostructured TiO2composite films

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Photocatalytic degradation of formaldehyde by nanostructured TiO₂composite films