A Sol-solvothermal Processed ‘Black TiO2’ as Photoanode Material in Dye Sensitized Solar Cells

Ullattil, Sanjay Gopal; Thelappurath, Aiswarya Vijayakumar; Tadka, Sriman Narayana; Kavil, Jithesh; Vijayan, Baiju Kizhakkekilikoodayil; Periyat, Pradeepan

doi:10.1016/j.solener.2017.06.059

Cited by 25 publications

(13 citation statements)

References 41 publications

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“…In the past years, black titanium oxide has attracted attention in different fields, such as photocatalytic pollutants degradation (Chen et al, 2011 ; Li et al, 2019 ; Plodinec et al, 2019 ), photocatalytic hydrogen production through water splitting (Wang et al, 2017 ; Pan et al, 2019 ), photocatalytic CO 2 reduction (Qingli et al, 2015 ; Zhao et al, 2016 ; Gao et al, 2020 ), solar–thermal material (Ye et al, 2017 ), supercapacitor (Zhi et al, 2016 ; Huang et al, 2018 ), photoanode in Dye-Sensitized Solar Cells (Ullattil et al, 2017 ), Lithium-ion batteries (Kim et al, 2017 ) (Yang et al, 2018 ), and medicine (Ni et al, 2017 ; Mazare et al, 2019 ).…”

Section: A Fundamental Process In Photocatalytic Activity Of Black Timentioning

confidence: 99%

Black TiO2 Synthesis by Chemical Reduction Methods for Photocatalysis Applications

Andronic

Eneşca

2020

Front. Chem.

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Applications of TiO 2 nanomaterials in photocatalysis, batteries, supercapacitors and solar cells, have seen widespread development in recent decades. Nowadays, black TiO 2 have won attention due to enhancing the solar light absorption by the formation of oxygen vacancies and Ti 3+ defects, to promote the separation of photo-generated charge carriers leading to the improvement of the photocatalytic performance in H 2 production and pollutants degradation. The enhanced photocatalytic activity of black TiO 2 is also due to a lattice disorder on the surface and the presence of oxygen vacancies, Ti 3+ ions, Ti-OH and Ti-H groups. Enhancing the optical absorption characteristics of TiO 2 and change of energy level and band-gap of materials have been successfully demonstrated to improve their photocatalytic activities, especially for black TiO 2 nanoparticles, which promote visible light absorption. The current review focuses on the investigation of the chemical reduction synthetic route for black TiO 2 nanomaterials, and their proposed association with green applications such as photodegradation of organic pollutants and photocatalytic water splitting. The synthesis methods of black TiO 2 involves the changes from Ti 4+ to Ti 3+ state, into different strategies: (1) The use of highly active hydrogen species such as H 2 , H 2 /Ar or H 2 /N 2 gases, and metal hydrides (NaBH 4 , CaH 2 ), (2) the reduction by active metals such as aluminum, magnesium and zinc, and (3) organic molecules such as imidazole and ascorbic acid.

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Section: A Fundamental Process In Photocatalytic Activity Of Black Timentioning

confidence: 99%

Black TiO2 Synthesis by Chemical Reduction Methods for Photocatalysis Applications

Andronic

Eneşca

2020

Front. Chem.

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“…Anatase TiO2 has been widely investigated as a photocatalyst and as a solar cell material due to its intense absorption in the ultra-violet wavelength region [1][2][3][4][5][6][7]. Furthermore, it has been long established as an effective electron transport layer (ETL) in dye-sensitized solar cells (DSSCs) and recently in organic (OSCs) and perovskite solar cells (PSCs) [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. The bandgap of anatase TiO2, which is around 3.2 eV [26,27], reduces its absorption in the near-infrared and visible region [7].…”

Section: Introductionmentioning

confidence: 99%

Structural, Electronic, and Optical Properties of Group 6 Doped Anatase TiO2: A Theoretical Approach

et al. 2021

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Titania (TiO2) is a key material used as an electron transport in dye-sensitized and halide perovskite solar cells due to its intrinsic n-type conductivity, visible transparency, low-toxicity, and abundance. Moreover, it exhibits pronounced photocatalytic properties in the ultra-violet part of the solar spectrum. However, its wide bandgap (around 3.2 eV) reduces its photocatalytic activity in the visible wavelengths’ region and electron transport ability. One of the most efficient strategies to simultaneously decrease its bandgap value and increase its n-type conductivity is doping with appropriate elements. Here, we have investigated using the density functional theory (DFT), as well as the influence of chromium (Cr), molybdenum (Mo), and tungsten (W) doping on the structural, electronic, and optical properties of TiO2. We find that doping with group 6 elements positively impacts the above-mentioned properties and should be considered an appropriate method for photocatalystic applications. In addition to the pronounced reduction in the bandgap values, we also predict the formation of energy states inside the forbidden gap, in all the cases. These states are highly desirable for photocatalytic applications as they induce low energy transitions, thus increasing the oxide’s absorption within the visible. Still, they can be detrimental to solar cells’ performance, as they constitute trap sites for photogenerated charge carriers.

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“…The main characteristics that are relevant after the TiO 2 hydrogenation process are: (i) the engineered-disorder-surface; (ii) the existence of Ti 3+ species, oxygen vacancy states and surface hydroxyl (OH) groups; (iii) bandgap narrowing; and (iv) valence band edge [28]. Due to their motivating characteristics, black TiO 2 materials have been widely used in many areas, among which we can highlight the photocatalysis processes [29], hydrogen generation [30], solar desalination [31], dye-sensitized solar cells [32], supercapacitors [33], and photothermal therapy [34].…”

Section: Introductionmentioning

confidence: 99%

Black TiO2 Thin Films Production Using Hollow Cathode Hydrogen Plasma Treatment: Synthesis, Material Characteristics and Photocatalytic Activity

et al. 2020

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Black TiO2 materials have been quite widely explored due to their large solar absorption and superior photocatalytic activity. In this paper, the blackening process of titanium dioxide (TiO2) thin film using the hollow cathode hydrogen plasma (HCHP) technique is reported. First, pristine anatase TiO2 films were grown by magnetron sputtering onto silicon and cover glass substrates and then annealed at 450 °C for 2 h. Then, the as-grown TiO2 films were treated with HCHP for 15 min. The physical, chemical and morphological properties of the films were analyzed by profilometry, X-ray diffraction (XRD), UV-Vis spectrophotometry, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) techniques. Electrical and photocatalytic measurements were performed by four-point probe and methylene blue UV degradation assays, respectively. The results showed that the black TiO2 film is highly absorbent in the UV-visible region, has low electrical resistance and greater surface area compared to the non-treated TiO2 film. These properties of black TiO2 film, as well as its performance as a photocatalytic agent, were investigated, indicating the superior quality of this material in thin film form and the promising potential of the HCHP treatment to produce hydrogenated TiO2 in short process time.

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A Sol-solvothermal Processed ‘Black TiO2’ as Photoanode Material in Dye Sensitized Solar Cells

Cited by 25 publications

References 41 publications

Black TiO2 Synthesis by Chemical Reduction Methods for Photocatalysis Applications

Black TiO2 Synthesis by Chemical Reduction Methods for Photocatalysis Applications

Structural, Electronic, and Optical Properties of Group 6 Doped Anatase TiO2: A Theoretical Approach

Black TiO2 Thin Films Production Using Hollow Cathode Hydrogen Plasma Treatment: Synthesis, Material Characteristics and Photocatalytic Activity

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