Chemo-mechanical strain effects on band engineering of the TiO2 photocatalyst for increasing the water splitting activity

2020 ◽  
Vol 8 (3) ◽  
pp. 1335-1346 ◽  
Author(s):  
Yoonyoung Kim ◽  
Motonori Watanabe ◽  
Junko Matsuda ◽  
Aleksandar Staykov ◽  
Hajime Kusaba ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
High Temperature ◽  
Water Splitting ◽  
Charge Separation ◽  
Tensile Strain ◽  
Anatase Phase ◽  
Mechanical Strain ◽  
Tio2 Photocatalyst ◽  
Strain Effects ◽  
Band Engineering

Tensile strain induced by dispersion of Au particles is effective for stabilizing the anatase phase of TiO2 at high temperature and also increasing the photocatalytic activity by an increase in the charge separation with band engineering.

Tensile strain for band engineering of SrTiO3 for increasing photocatalytic activity to water splitting

2020 ◽  
Vol 278 ◽  
pp. 119292
Author(s):  
Yoonyoung Kim ◽  
Motonori Watanabe ◽  
Junko Matsuda ◽  
Jun Tae Song ◽  
Atsushi Takagaki ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Water Splitting ◽  
Tensile Strain ◽  
Band Engineering

Photocatalytic Water Splitting and Photocatalytic Degradation in Aqueous GdVO4 Suspensions under Simulated Solar Irradiation

2013 ◽  
Vol 873 ◽  
pp. 571-574 ◽  
Author(s):  
Yan Bai ◽  
Ya Ming Ding ◽  
Zhi Min Li
Keyword(s):  
Photocatalytic Activity ◽  
High Temperature ◽  
Solid State ◽  
Water Splitting ◽  
Rhodamine B ◽  
Pure Water ◽  
Xrd Analysis ◽  
Solar Irradiation ◽  
Tetragonal Type ◽  
Simulated Solar Irradiation

GdVO4 was synthesized by solid state reaction at high temperature and characterized by XRD, UVvisible DRS, BET and SEM. XRD analysis of GdVO4 showed its structure was of tetragonal type. When GdVO4 was loaded with 0.3 wt% Pt, it showed the better photocatalytic activity for water splitting under simulated solar irradiation, and the amounts of the produced hydrogen in pure water were about 9.33 μmol under the irradiation of simulated solar for 6 h. Furthermore, photodegradation of Rhodamine B (Rh B ) on the samples were investigated under simulated solar irradiation.

scholarly journals Synthesis, Characterization of Cu, S doped TiO2 and Its Photocatalytic Activity for Degradation of Remazol Black B

2019 ◽  
Vol 22 (2) ◽  
pp. 47-51 ◽  
Author(s):  
Abdul Haris ◽  
Gunawan Gunawan ◽  
Didik Setiyo Widodo ◽  
Rahmad Nuryanto ◽  
Retno Ariadi Lusiana ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Pore Volume ◽  
Energy Gap ◽  
Diffuse Reflectance Spectroscopy ◽  
Anatase Phase ◽  
Visible Region ◽  
Tio2 Photocatalyst ◽  
Remazol Black B ◽  
Bet Analysis ◽  
Remazol Black

Copper and sulfur modified TiO2(Cu-S-TiO2) photocatalyst was successfully synthesized using TiCl4, Cu(NO3)2.3H2O and H2SO4 as precursors by the sol-gel method andcalcination at 450°C for 4 hours. The synthesized photocatalyst was characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS), Diffuse Reflectance Spectroscopy (DRS), Brunauer Emmett Teller (BET) method. The XRD results showed that the Cu-S-TiO2 photocatalyst had an anatase phase with a crystal grain size of 17.54 nm. However, the SEM image of the modified TiO2 showed inhomogeneous phase due to the crystal clustering of imperfect homogenization during the synthesis and sintering processes. The patterns of EDSof Cu-S-TiO2depicted the elements of Ti, O, Cu and S with doping of Cu and S c.a. 7 and 1%, respectively. Analysis using DRS UV-Vis showed Cu-S-TiO2 was able to shift the absorption of the TiO2 photocatalyst wavelength to the visible region with a band energy gap of 1.9 eV. The BET analysis results showed that the specific surface area (SBET), pore volume (Vp) and average pore volume radius (Dp) were measured from large Cu-S-TiO2, therefore Cu-S-TiO2 had good physicochemical and photocatalytic properties. The photocatalytic activity of 0.1 g Cu-S-TiO2 with 15 Watt tungsten light irradiation for 4 h was able to degrade 50 mL remazol black B 10 mg/L c.a. 92.60 %.

Preparation of Silver-Doped TiO2 Photoatalyst via a Simple Sol-Hydrothermal and their Visible Light Photocatalytic Activity

2011 ◽  
Vol 694 ◽  
pp. 824-830 ◽  
Author(s):  
Li Guo ◽  
Feng Fu ◽  
Dan Jun Wang ◽  
Xiao Dan Qiang ◽  
Qing Bo Wei ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Anatase Phase ◽  
Visible Region ◽  
Tio2 Photocatalyst ◽  
Hydrothermal Route ◽  
Nano Tio2 ◽  
Absorption Intensity ◽  
Ag Doping ◽  
Vis Spectroscopy ◽  
Visible Light Photocatalytic

Silver-doped nano-TiO2 photocatalyst were synthesized via a simple hydrothermal route. The samples were characterized by XRD, XPS, FE-SEM and UV-Vis absorption spectrum techniques. Rhodamine B was selected as the model-pollutant to evaluate the photocatalytic activity of the samples. The XRD results indicated that the Ag-doped TiO2 were pure anatase phase. The UV-Vis spectroscopy revealed that the Ag doping can increase the absorption intensity of TiO2 in the visible region, which results in the improving the photocatalytic activity of TiO2 photocatalyst. Photocatalytic experimental results revealed that Ag-doping TiO2 catalyst shows the enhancement photocatalytic activity.

Oxygen-deficient WO3via high-temperature two-step annealing for enhanced and highly stable water splitting

2019 ◽  
Vol 55 (55) ◽  
pp. 7958-7961 ◽  
Author(s):  
Shasha Tang ◽  
Marc Courté ◽  
Jingjing Peng ◽  
Denis Fichou
Keyword(s):  
High Temperature ◽  
Water Splitting ◽  
Charge Separation ◽  
Oxygen Deficiency ◽  
Photocatalytic Ability ◽  
Efficient Charge ◽  
One Step

In contrast with conventional one-step annealed WO3, high-temperature two-step annealed WO3 contains a higher concentration of oxygen deficiency, leading to more efficient charge separation and improved photocatalytic ability.

Strain effects on Co,N co-decorated graphyne catalysts for overall water splitting electrocatalysis

2020 ◽  
Vol 22 (4) ◽  
pp. 2457-2465 ◽  
Author(s):  
Xiaoping Gao ◽  
Yanan Zhou ◽  
Yujia Tan ◽  
Shiqiang Liu ◽  
Zhiwen Cheng ◽  
...  
Keyword(s):  
Water Splitting ◽  
Electrocatalytic Activity ◽  
Tensile Strain ◽  
Lattice Strain ◽  
Strain Effects ◽  
Overall Water Splitting ◽  
Biaxial Tensile ◽  
Biaxial Tensile Strain

The electrocatalytic activity of the Co@N1-GY catalyst can be directly optimized by lattice strain and achieves ideal HER performance under tensile strain of 0.5% and the minimum OER overpotential of 0.33 V under 3% biaxial tensile strain.

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