Enhanced visible-light absorption and room-temperature ferromagnetism of [KNbO3]1-x[BaFe1/2Nb1/2O3-δ]x solid solutions

2021 ◽  
Author(s):  
Ping Wu ◽  
Jiaqi Pan ◽  
Xiongwen Chen
Keyword(s):  
Visible Light ◽  
Solid Solutions ◽  
Light Absorption ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Visible Light Absorption

Highly reduced TiO2-δ nanotube arrays with enhanced visible-light absorption and room-temperature ferromagnetism

2012 ◽  
Vol 69 ◽  
pp. 89-91 ◽  
Author(s):  
Zongwen Zhang ◽  
Lei Guo ◽  
Chen Xi ◽  
Jinghui Li ◽  
Zhen Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Nanotube Arrays ◽  
Visible Light Absorption

Room-Temperature Long-Lived 3IL Excited State of Rhodamine in an NN PtII Bis(acetylide) Complex with Intense Visible-Light Absorption

2011 ◽  
Vol 2011 (29) ◽  
pp. 4527-4533 ◽  
Author(s):  
Ling Huang ◽  
Le Zeng ◽  
Huimin Guo ◽  
Wanhua Wu ◽  
Wenting Wu ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Light Absorption ◽  
Room Temperature ◽  
Visible Light Absorption

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>

Double Doping of NaTaO3 Photocatalysts with Lanthanum and Manganese for Strongly Enhanced Visible-Light Absorption

2019 ◽  
Vol 2 (10) ◽  
pp. 7518-7526 ◽  
Author(s):  
Hanggara Sudrajat ◽  
Mitsunori Kitta ◽  
Nobuyuki Ichikuni ◽  
Hiroshi Onishi
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
Double Doping

Carrier Engineering of Zr-mediated Ta3N5 Film as Efficient Photoanode for Solar Water Splitting

2021 ◽  
Author(s):  
Xin Zou ◽  
Xueyang Han ◽  
Chengxiong Wang ◽  
Yunkun Zhao ◽  
Chun Du ◽  
...  
Keyword(s):  
Band Structure ◽  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Photoelectrochemical Water Splitting ◽  
Promising Candidate ◽  
Visible Light Absorption ◽  
Solar Water ◽  
Solar Water Splitting

Ta3N5 is regarded as a promising candidate material with adequate visible light absorption and band structure for photoelectrochemical water splitting. However, the performance of Ta3N5 is severely limited by the...

scholarly journals Effects of Fe doping on the visible light absorption and bandgap tuning of lead-free (CsSnCl3) and lead halide (CsPbCl3) perovskites for optoelectronic applications

AIP Advances ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 035229
Author(s):  
M. I. Kholil ◽  
M. T. H. Bhuiyan ◽  
M. Atikur Rahman ◽  
M. S. Ali ◽  
M. Aftabuzzaman
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Lead Free ◽  
Fe Doping ◽  
Visible Light Absorption ◽  
Optoelectronic Applications ◽  
Bandgap Tuning ◽  
Lead Halide
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