Effect of gold loading and TiO2 support composition on the activity of Au/TiO2 photocatalysts for H2 production from ethanol–water mixtures

2013 ◽  
Vol 305 ◽  
pp. 307-317 ◽  
Author(s):  
Vedran Jovic ◽  
Wan-Ting Chen ◽  
Dongxiao Sun-Waterhouse ◽  
Mark G. Blackford ◽  
Hicham Idriss ◽  
...  
Keyword(s):  
H2 Production ◽  
Tio2 Photocatalysts ◽  
Tio2 Support

scholarly journals Double-Nozzle Flame Spray Pyrolysis as a Potent Technology to Engineer Noble Metal-TiO2 Nanophotocatalysts for Efficient H2 Production

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 817
Author(s):  
Maria Solakidou ◽  
Yiannis Georgiou ◽  
Yiannis Deligiannakis
Keyword(s):  
Spray Pyrolysis ◽  
Noble Metal ◽  
H2 Production ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Scale Production ◽  
Efficient Technology ◽  
Tio2 Photocatalysts ◽  
Surface Dispersion ◽  
Tio2 Matrix

Noble metal-TiO2 nanohybrids, NM0-TiO2, (NM0 = Pt0, Pd0, Au0, Ag0) have been engineered by One-Nozzle Flame Spray Pyrolysis (ON-FSP) and Double-Nozzle Flame Spray Pyrolysis (DN-FSP), by controlling the method of noble metal deposition to the TiO2 matrix. A comparative screening of the two FSP methods was realized, using the NM0-TiO2 photocatalysts for H2 production from H2O/methanol. The results show that the DN-FSP process allows engineering of more efficient NM0-TiO2 nanophotocatalysts. This is attributed to the better surface-dispersion and narrower size-distribution of the noble metal onto the TiO2 matrix. In addition, DN-FSP process promoted the formation of intraband states in NM0-TiO2, lowering the band-gap of the nanophotocatalysts. Thus, the present study demonstrates that DN-FSP process is a highly efficient technology for fine engineering of photocatalysts, which adds up to the inherent scalability of Flame Spray Pyrolysis towards industrial-scale production of nanophotocatalysts.

scholarly journals Influence of TiO2 Support on Activity of Co3O4/TiO2 Photocatalysts for Visible-Light Water Oxidation

2018 ◽  
Vol 91 (3) ◽  
pp. 486-491 ◽  
Author(s):  
Koki Ishimaki ◽  
Tomoki Uchiyama ◽  
Megumi Okazaki ◽  
Daling Lu ◽  
Yoshiharu Uchimoto ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Tio2 Photocatalysts ◽  
Light Water ◽  
Tio2 Support

Photocatalytic H2 Production from Ethanol–Water Mixtures Over Pt/TiO2 and Au/TiO2 Photocatalysts: A Comparative Study

2013 ◽  
Vol 56 (12) ◽  
pp. 1139-1151 ◽  
Author(s):  
Vedran Jovic ◽  
Zakiya H. N. Al-Azri ◽  
Wan-Ting Chen ◽  
Dongxiao Sun-Waterhouse ◽  
H. Idriss ◽  
...  
Keyword(s):  
Comparative Study ◽  
H2 Production ◽  
Tio2 Photocatalysts

Dye-Sensitized Photocatalyst System for Water Splitting Into H2 and O2 Under Visible Light Irradiation

Solar Energy ◽  
2004 ◽  
Author(s):  
Ryu Abe ◽  
Kazuhiro Sayama ◽  
Hironori Arakawa
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Energy Gap ◽  
H2 Production ◽  
Light Irradiation ◽  
Mixed Solution ◽  
Tio2 Photocatalysts ◽  
Dye Sensitized ◽  
Splitting System

H2 production from a water-acetonitrile mixed solution containing iodide electron donor was investigated over dye-sensitized Pt/TiO2 photocatalysts under visible light irradiation, as a part of water splitting system using iodide redox mediator. The rates of H2 evolution were decreased with the increase of the water ratio in the mixed solutions, because of the decrease in energy gap between the redox potential of I3−/I− and the HOMO levels of the dyes, which lowing the efficiency of electron transfer from I− to dye.

Performance comparison of Ni/TiO2 and Au/TiO2 photocatalysts for H2 production in different alcohol-water mixtures

2018 ◽  
Vol 367 ◽  
pp. 27-42 ◽  
Author(s):  
Wan-Ting Chen ◽  
Andrew Chan ◽  
Dongxiao Sun-Waterhouse ◽  
Jordi Llorca ◽  
Hicham Idriss ◽  
...  
Keyword(s):  
H2 Production ◽  
Performance Comparison ◽  
Tio2 Photocatalysts ◽  
Alcohol Water

Comparison of the substrate dependent performance of Pt-, Au- and Ag-doped TiO2 photocatalysts in H2-production and in decomposition of various organics

2009 ◽  
Vol 98 (2) ◽  
pp. 215-225 ◽  
Author(s):  
Károly Mogyorósi ◽  
Ákos Kmetykó ◽  
Nóra Czirbus ◽  
Gábor Veréb ◽  
Pál Sipos ◽  
...  
Keyword(s):  
H2 Production ◽  
Tio2 Photocatalysts ◽  
Doped Tio2

Activation of solid grinding-derived Au/TiO2 photocatalysts for solar H2 production from water-methanol mixtures with low alcohol content

2017 ◽  
Vol 352 ◽  
pp. 22-34 ◽  
Author(s):  
Clément Marchal ◽  
Alexandre Piquet ◽  
Matthieu Behr ◽  
Thomas Cottineau ◽  
Vasiliki Papaefthimiou ◽  
...  
Keyword(s):  
H2 Production ◽  
Alcohol Content ◽  
Tio2 Photocatalysts ◽  
Low Alcohol

Effect of TiO2 polymorph and alcohol sacrificial agent on the activity of Au/TiO2 photocatalysts for H2 production in alcohol–water mixtures

2015 ◽  
Vol 329 ◽  
pp. 499-513 ◽  
Author(s):  
Wan-Ting Chen ◽  
Andrew Chan ◽  
Zakiya H.N. Al-Azri ◽  
Aubrey G. Dosado ◽  
Muhammad A. Nadeem ◽  
...  
Keyword(s):  
H2 Production ◽  
Tio2 Photocatalysts ◽  
Alcohol Water ◽  
Sacrificial Agent

scholarly journals Study of PtOx/TiO2 Photocatalysts in the Photocatalytic Reforming of Glycerol: The Role of Co-Catalyst Formation

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1927 ◽  
Author(s):  
Katalin Majrik ◽  
Zoltán Pászti ◽  
László Korecz ◽  
László Trif ◽  
Attila Domján ◽  
...  
Keyword(s):  
Adsorbed Water ◽  
Particle Growth ◽  
H2 Production ◽  
Incipient Wetness Impregnation ◽  
1H Mas Nmr ◽  
Tio2 Photocatalysts ◽  
Co Catalyst ◽  
Co Catalysts ◽  
Preparation Conditions ◽  
Catalyst Formation

In this study, relationships between preparation conditions, structure, and activity of Pt-containing TiO2 photocatalysts in photoinduced reforming of glycerol for H2 production were explored. Commercial Aerolyst® TiO2 (P25) and homemade TiO2 prepared by precipitation-aging method were used as semiconductors. Pt co-catalysts were prepared by incipient wetness impregnation from aqueous solution of Pt(NH3)4(NO3)2 and activated by calcination, high temperature hydrogen, or nitrogen treatments. The chemico-physical and structural properties were evaluated by XRD, 1H MAS NMR, ESR, XPS, TG-MS and TEM. The highest H2 evolution rate was observed over P25 based samples and the H2 treatment resulted in more active samples than the other co-catalyst formation methods. In all calcined samples, reduction of Pt occurred during the photocatalytic reaction. Platinum was more easily reducible in all of the P25 supported samples compared to those obtained from the more water-retentive homemade TiO2. This result was related to the negative effect of the adsorbed water content of the homemade TiO2 on Pt reduction and on particle growth during co-catalyst formation.

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