scholarly journals Cu–Co‐codoped titanate/TiO 2 nanocomposite thin films for enhanced visible light absorption

2019 ◽  
Vol 14 (8) ◽  
pp. 848-851 ◽  
Author(s):  
Yongliang An ◽  
Dongjun Wang ◽  
Dongsong Yin ◽  
Liang Song ◽  
Yongsheng Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Visible Light ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
Nanocomposite Thin Films

Origin of significant visible-light absorption properties of Mn-doped TiO2 thin films

2012 ◽  
Vol 60 (5) ◽  
pp. 1974-1985 ◽  
Author(s):  
X.H. Xia ◽  
L. Lu ◽  
A.S. Walton ◽  
M. Ward ◽  
X.P. Han ◽  
...  
Keyword(s):  
Thin Films ◽  
Visible Light ◽  
Light Absorption ◽  
Tio2 Thin Films ◽  
Absorption Properties ◽  
Visible Light Absorption ◽  
Doped Tio2 ◽  
Mn Doped

Comparison of organic and inorganic layers for structural templating of pentacene thin films

2020 ◽  
Vol 7 (1) ◽  
pp. 289-298 ◽  
Author(s):  
Dong Kuk Kim ◽  
Daphné Lubert-Perquel ◽  
Sandrine Heutz
Keyword(s):  
Thin Films ◽  
Visible Light ◽  
Work Function ◽  
Functional Properties ◽  
Light Absorption ◽  
Molecular Orientation ◽  
Effective Control ◽  
Visible Light Absorption ◽  
Inorganic Layers

Effective control over the molecular orientation of pentacene was achieved with copper(i) iodide and results in a change in the functional properties with increases in both visible light absorption and work function.

Tunable visible light absorption of MoO3-CdTe composite thin films

2017 ◽  
Vol 636 ◽  
pp. 137-143 ◽  
Author(s):  
Abdulmajeed Hasan Yahya Hendi ◽  
M.F. Al-Kuhaili ◽  
S.M.A. Durrani ◽  
M.M. Faiz ◽  
A. Ul-Hamid ◽  
...  
Keyword(s):  
Thin Films ◽  
Visible Light ◽  
Light Absorption ◽  
Composite Thin Films ◽  
Visible Light Absorption

scholarly journals Synthesis of pure and C/S/N co-doped Titania on Al mesh and their photocatalytic usage in Benzene degradation

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
S. Modanlu ◽  
A. Shafiekhani
Keyword(s):  
Thin Films ◽  
Visible Light ◽  
Surface Area ◽  
Light Absorption ◽  
Average Crystalline Size ◽  
Light Illumination ◽  
Visible Light Absorption ◽  
Benzene Degradation ◽  
Doped Titania ◽  
Co Doped

Abstract Pure and co-doped Titania thin films were prepared on aluminum substrates through the sol-gel method. The co-doped sample showed higher photocatalytic activity on benzene degradation compared to pure TiO2 under visible light illumination. XRD results showed the anatase phase for both TiO2 and co-doped TiO2 lattices with an average crystalline size of 12.9 and 10.4 nm, respectively. According to the UV-visible absorption spectra results, co-doped Titania showed higher visible light absorption compared to pure Titania. The synergistic effect of dopants caused a redshift to visible light absorption and also the lifetime of the photogenerated electron-hole were increased by induced electron levels in Titania lattice. The novelty of this study is the reactor’s specific design. We employed Al mesh as thin film substrate for 3 main reasons, first, the large surface area of the Al mesh causes to increase specific surface area of the photocatalysts, also it is a formable substrate which can be engineered geometrically to decrease the shadow spots so the thin films will receive the highest light irradiation. Also, the Al mesh flexibility facilitates the procedure of reactor design to reach a minimum pressure drop of airflow while it is installed in the air conditioners or HVAC systems.

Molecular layer deposition of charge-transfer complex thin films with visible-light absorption

2018 ◽  
Vol 52 ◽  
pp. 237-242 ◽  
Author(s):  
Jin Won Jung ◽  
Kyu S. Han ◽  
Kwan Hyuck Yoon ◽  
Lynn Lee ◽  
Yong-Eun Koo Lee ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Transfer ◽  
Visible Light ◽  
Light Absorption ◽  
Charge Transfer Complex ◽  
Molecular Layer ◽  
Molecular Layer Deposition ◽  
Visible Light Absorption ◽  
Layer Deposition

Impact of Rutile Fraction on TiO2 Visible-Light Absorption and Visible-Light-Induced Photocatalytic Activity

2018 ◽  
Author(s):  
David Maria Tobaldi ◽  
Luc Lajaunie ◽  
ana caetano ◽  
nejc rozman ◽  
Maria Paula Seabra ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Solid Phase ◽  
Diffraction Method ◽  
Band Alignment ◽  
Quantitative Phase Analysis ◽  
Transmission Microscopy ◽  
Visible Light Absorption ◽  
X Ray

<div>Titanium dioxide is by far the most utilised semiconductor material for photocatalytic applications. Still, it is transparent to visible-light. Recently, it has been proved that a type-II band alignment for the rutile−anatase mixture would improve its visible-light absorption.</div><div>In this research paper we thoroughly characterised the real crystalline and amorphous phases of synthesised titanias – thermally treated at different temperatures to get distinct ratios of anatase-rutile-amorphous fraction – as well as that of three commercially available photocatalytic nano-TiO2. </div><div>The structural characterisation was done via advanced X-ray diffraction method, namely the Rietveld-RIR method, to attain a full quantitative phase analysis of the specimens. The microstructure was also investigated via an advanced X-ray method, the whole powder pattern modelling. These methods were validated combining advanced aberration-corrected scanning transmission microscopy and high-resolution electron energy-loss spectroscopy. The photocatalytic activity was assessed in the liquid- and gas-solid phase (employing rhodamine B and 4-chlorophenol, and isopropanol, respectively, as the organic substances to degrade) using a light source irradiating exclusively in the visible-range.</div><div>Optical spectroscopy showed that even a small fraction of rutile (2 wt%) is able to shift to lower energies the apparent optical band gap of an anatase-rutile mixed phase. But is this enough to attain a real photocatalytic activity promoted by merely visible-light?</div><div>We tried to give a reply to that question.</div><div>Photocatalytic activity results in the liquid-solid phase showed that a high surface hydroxylation led to specimen with superior visible light-induced catalytic activity (i.e. dye and ligand-to-metal charge transfer complexes sensitisation effects). That is: not photocatalysis <i>sensu-strictu</i>.</div><div>On the other hand, the gas-solid phase results showed that a higher amount of the rutile fraction (around 10 wt%), together with less recombination of the charge carriers, were more effective for an actual photocatalytic oxidation of isopropanol.</div>

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