Zwitterionic buffer-induced visible light excitation of TiO2 for efficient pollutant photodegradation

RSC Advances ◽  
2016 ◽  
Vol 6 (42) ◽  
pp. 35449-35454 ◽  
Author(s):  
Xiang Xiao ◽  
Wen-Wen Zhu ◽  
Yu-Bin Lei ◽  
Qiu-Yue Liu ◽  
Qian Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Organic Molecules ◽  
Surface Complexation ◽  
Environmentally Benign ◽  
Visible Light Absorption ◽  
Photocatalytic Application ◽  
Light Excitation ◽  
Zwitterionic Buffer

TiO2 surface complexation with antenna organic molecules confers it a visible light absorption ability that favors ​photocatalytic application, but environmentally benign antenna molecules are yet to be developed.

Understanding the electron transfer process in ZnO–naphthol azobenzoic acid composites from photophysical characterisation

2016 ◽  
Vol 18 (32) ◽  
pp. 22179-22187 ◽  
Author(s):  
Leena George ◽  
Athira K. Kunhikannan ◽  
Rajith Illathvalappil ◽  
Divya Ottoor ◽  
Sreekumar Kurungot ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Transfer Process ◽  
Light Absorption ◽  
Organic Molecules ◽  
Semiconductor Nanoparticles ◽  
Electron Transfer Process ◽  
Visible Light Absorption ◽  
Catalytic Sites ◽  
Surface Modified

Semiconductor nanoparticles surface modified with organic molecules capable of visible light absorption and effectively transferring the electrons to the catalytic sites have the potential to be good photocatalysts.

Visible light absorption and photoelectrochemical activity of colorless molecular 1,3-bis(dicyanomethylidene)indane (BDMI) by surface complexation on TiO2

2015 ◽  
Vol 17 (28) ◽  
pp. 18541-18546 ◽  
Author(s):  
Soo-Byung Ko ◽  
Tae In Ryu ◽  
An-Na Cho ◽  
Junichi Fujisawa ◽  
Hiroshi Segawa ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Surface Complexation ◽  
Blue Color ◽  
Photoelectrochemical Activity ◽  
Visible Light Absorption ◽  
P Adsorption ◽  
Deep Blue

Adsorption of colorless 1,3-bis(dicyanomethylidene)indane (BDMI) onto a nanocrystalline TiO2 surface unusually turned the BDMI a deep blue color.

scholarly journals Circularly Polarized Luminescence by Visible-Light Absorption in a Chiral O-BODIPY Dye: Unprecedented Design of CPL Organic Molecules from Achiral Chromophores

2014 ◽  
Vol 136 (9) ◽  
pp. 3346-3349 ◽  
Author(s):  
Esther M. Sánchez-Carnerero ◽  
Florencio Moreno ◽  
Beatriz L. Maroto ◽  
Antonia R. Agarrabeitia ◽  
María J. Ortiz ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Organic Molecules ◽  
Visible Light Absorption ◽  
Circularly Polarized ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

A new precursor to synthesize g-C3N4 with superior visible light absorption for photocatalytic application

2017 ◽  
Vol 7 (9) ◽  
pp. 1826-1830 ◽  
Author(s):  
Saisai Yuan ◽  
Qitao Zhang ◽  
Bin Xu ◽  
Sixiao Liu ◽  
Jinquan Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
One Pot ◽  
Visible Light Absorption ◽  
Photocatalytic Application ◽  
Calcination Method

Graphitic carbon nitride (g-C3N4) was synthesized with a new precursor (thiourea oxide) by a simple one-pot calcination method.

Enhancing the photocatalytic activity of BiOX (X = Cl, Br, and I), (BiO)2CO3 and Bi2O3 by modifying their surfaces with polar organic anions, 4-substituted thiophenolates

2017 ◽  
Vol 5 (27) ◽  
pp. 14406-14414 ◽  
Author(s):  
Benyan Xu ◽  
Yang An ◽  
Yuanyuan Liu ◽  
Xiaoyan Qin ◽  
Xiaoyang Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Organic Molecules ◽  
Organic Anions ◽  
Visible Light Absorption ◽  
Surface Modified

Bi-based semiconductors surface-modified by polar organic molecules display extended visible light absorption and enhanced photocatalytic activity.

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...

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