Synthesis of Z‐Scheme CuInS 2 @BiOBr Heterojunction Composite with Visible‐Light Activity

2020 ◽  
Vol 5 (27) ◽  
pp. 8258-8264
Author(s):  
Haiqin Tang ◽  
Yuehong Deng ◽  
Hao Zou ◽  
Yawen Tan ◽  
Ye Xiang ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Activity

Effect of the addition of different doping agents on visible light activity of porous TiO2 photocatalysts

2018 ◽  
Vol 455 ◽  
pp. 108-120 ◽  
Author(s):  
Roberto Fiorenza ◽  
Marianna Bellardita ◽  
Salvatore Scirè ◽  
Leonardo Palmisano
Keyword(s):  
Visible Light ◽  
Tio2 Photocatalysts ◽  
Porous Tio2 ◽  
Light Activity

scholarly journals Study of the visible light activity of Pt and Au-TiO2 photocatalysts in organic pollutants degradation

2017 ◽  
pp. 20-30
Author(s):  
Jairo Antonio Cubillos-Lobo ◽  
◽  
Julie Joseane Murcia-Mesa ◽  
Jhonatan Ricardo Guarín-Romero ◽  
Hugo Alfonso Rojas-Sarmiento ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Pollutants ◽  
Tio2 Photocatalysts ◽  
Light Activity

Synthesis of Bi/Bi2O2SiO3/Bi2WO6 Composites with Enhanced Visible Light Activity in Photocatalytic Degradation of Organic Compounds

2020 ◽  
Vol 94 (6) ◽  
pp. 1254-1261
Author(s):  
Zhi Zhang ◽  
Chentao Zou ◽  
Jian Zhou ◽  
Zhiyuan Yang ◽  
Mengjun Liang ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Organic Compounds ◽  
Light Activity

scholarly journals Preparation and Characterization of Defective TiO2. The Effect of the Reaction Environment on Titanium Vacancies Formation

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2763
Author(s):  
Zuzanna Bielan ◽  
Szymon Dudziak ◽  
Agnieszka Sulowska ◽  
Daniel Pelczarski ◽  
Jacek Ryl ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Hydrothermal Reaction ◽  
High Photocatalytic Activity ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Light Activity ◽  
Cheap Alternative

Among various methods of improving visible light activity of titanium(IV) oxide, the formation of defects and vacancies (both oxygen and titanium) in the crystal structure of TiO2 is an easy and relatively cheap alternative to improve the photocatalytic activity. In the presented work, visible light active defective TiO2 was obtained by the hydrothermal reaction in the presence of three different oxidizing agents: HIO3, H2O2, and HNO3. Further study on the effect of used oxidant and calcination temperature on the physicochemical and photocatalytic properties of defective TiO2 was performed. Obtained nanostructures were characterized by X-ray diffractometry (XRD), specific surface area (BET) measurements, UV-Vis diffuse reflectance spectroscopy (DR-UV/Vis), photoluminescence spectroscopy (PL), X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR) spectroscopy. Degradation of phenol as a model pollutant was measured in the range of UV-Vis and Vis irradiation, demonstrating a significant increase of photocatalytic activity of defective TiO2 samples above 420 nm, comparing to non-defected TiO2. Correlation of EPR, UV-Vis, PL, and photodegradation results revealed that the optimum concentration of HIO3 to achieve high photocatalytic activity was in the range of 20–50 mol%. Above that dosage, titanium vacancies amount is too high, and the obtained materials’ photoactivity was significantly decreased. Studies on the photocatalytic mechanism using defective TiO2 have also shown that •O2− radical is mainly responsible for pollutant degradation.

Sign in / Sign up

Export Citation Format

Share Document