Controllable synthesis of conical BiVO4 for photocatalytic water oxidation

2020 ◽  
Vol 8 (5) ◽  
pp. 2331-2335 ◽  
Author(s):  
Li Jie Wang ◽  
Jing Yang Bai ◽  
Yi Jun Zhang ◽  
Fangxin Mao ◽  
Yuanwei Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Water Oxidation ◽  
Curved Surface ◽  
Controllable Synthesis ◽  
Free Standing ◽  
Absorption Region ◽  
Visible Light Absorption

Free-standing conical BiVO4 crystals featuring a curved surface and sharp tips were synthesized. The sample exhibited an enlarged visible light absorption region and good photocatalytic water oxidation ability.

Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst

2016 ◽  
Vol 52 (94) ◽  
pp. 13702-13705 ◽  
Author(s):  
Masanori Yamamoto ◽  
Yusuke Nishizawa ◽  
Pavel Chábera ◽  
Fusheng Li ◽  
Torbjörn Pascher ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Light Absorption ◽  
Water Oxidation ◽  
Artificial Photosynthesis ◽  
Oxidation Catalyst ◽  
Interfacial Electron Transfer ◽  
Visible Light Absorption ◽  
Visible Light Driven

A newly designed contracted porphyrin achieved efficient visible light absorption and interfacial electron transfer for water oxidation in artificial photosynthesis.

Efficient difunctional photocatalyst prepared in situ from Prussian blue analogues for catalytic water oxidation and visible-light absorption

2018 ◽  
Vol 8 (24) ◽  
pp. 6375-6383 ◽  
Author(s):  
Jia Guo ◽  
Hui Li ◽  
Di Wang ◽  
Liugen Zhang ◽  
Yuhua Ma ◽  
...  
Keyword(s):  
Visible Light ◽  
Prussian Blue ◽  
Light Absorption ◽  
Water Oxidation ◽  
Cuo Nanoparticles ◽  
Oxidation Catalysts ◽  
Visible Light Absorption ◽  
Prussian Blue Analogues ◽  
Visible Light Driven

Co(OH)2-modified CuO (Co(OH)2/CuO) nanoparticles serve as both visible-light-driven water oxidation catalysts and visible-light-absorption centers.

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...

Tetragonal Tungsten Bronze Type Sn(II)-Based Quaternary Oxides: A New Type of Visible-Light-Absorbing Semiconductors for Photoelectrochemical Water Oxidation

2021 ◽  
Author(s):  
Yalong Zou ◽  
Jiabo Le ◽  
Yufeng Cao ◽  
Na An ◽  
Yang Zhou ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Tungsten Bronze ◽  
Complex Oxides ◽  
Tetragonal Tungsten Bronze ◽  
Visible Light Absorption ◽  
New Type ◽  
Hydrogen Fuels ◽  
Photoelectrochemical Water Oxidation ◽  
Pec Water Splitting

The attractive photoelectrochemical (PEC) water splitting for hydrogen fuels always desires new semiconductors which provide stronger visible light absorption with suitable band positions. Sn(II) complex oxides are expected to offer...

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

New carbon nitride close to C6N7 with superior visible light absorption for highly efficient photocatalysis

2021 ◽  
Author(s):  
Xinyu Zhao ◽  
Yingnan Zhao ◽  
Huaqiao Tan ◽  
Huiying Sun ◽  
Xing Qin ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Carbon Nitride ◽  
Visible Light Absorption ◽  
Highly Efficient
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