scholarly journals Progress, Challenge, and Perspective of Bimetallic TiO2-Based Photocatalysts

2014 ◽  
Vol 2014 ◽  
pp. 1-17 ◽  
Author(s):  
Anna Zielińska-Jurek
Keyword(s):  
Photocatalytic Activity ◽  
The Other ◽  
Light Irradiation ◽  
Oxidation Reactions ◽  
Environmental Application ◽  
Metal Structures ◽  
Highly Active ◽  
Level Of Activity ◽  
Wide Wavelength Range ◽  
Hydrogenation Reactions

Bimetallic TiO2-based photocatalysts have attracted considerable attention in recent years as a class of highly active catalysts and photocatalysts under both UV and Vis light irradiation. Bimetallic noble metal structures deposited on TiO2possess the ability to absorb visible light, in a wide wavelength range (broad LSPR peak), and therefore reveal the highest level of activity as a result of utilization of a large amount of incident photons. On the other hand they can enhance the rate of trapping photoexcited electrons and inhibit the recombination process due to the capability of the storage of photoexcited electrons. Based on literature two groups of bimetallic photocatalysts were distinguished. The first group includes bimetallic TiO2photocatalysts (BMOX), highly active under UV and Vis light irradiation in a variety of oxidation reactions, and the second group presents bimetallic photocatalysts (BMRED) exceptionally active in hydrogenation reactions. This review summarizes recent advances in the preparation and environmental application of bimetallic TiO2-based photocatalysts. Moreover, the effects of various parameters such as particle shape, size, amount of metals, and calcination on the photocatalytic activity of bimetallic TiO2-based photocatalysts are also discussed.

scholarly journals Synthesis of WO3/Ag3VO4 photocatalyst applying for the treatment of amoxicillin antibiotics under visible light

2021 ◽  
Vol 63 (11) ◽  
pp. 75-79
Author(s):  
Thi Thu Phuong Tran ◽  
◽  
My Ngoc Tram Dinh ◽  
Thi Yen Nhi Pham ◽  
Vu Ngoc Mai Nguyen ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Adsorption Capacity ◽  
Visible Light Irradiation ◽  
Photogenerated Electron ◽  
Reflectance Spectra ◽  
Light Irradiation ◽  
Electron Hole ◽  
Efficient Separation ◽  
Highly Active

In this paper, WO3/Ag3VO4 photocatalysts were successfully synthesised at various Ag3VO4/WO3 mole ratiosof5, 10, 15, and 20%(WA-x). Ultraviolet-visiblediffuse reflectance spectra (UV-Vis-DRS) indicated that the adsorption capacity of WA-10 (10% Ag3VO4/WO3 mole ratios) under visible light was higher than that of other materials. The photocatalytic properties of obtained materials were investigated by degradation of the antibiotic AMX under visible light irradiation. The degradation conversation of AMX had gotten to about 79.86% in WA-10 after a reaction of three hours. WO3/Ag3VO4 materials were highly active than WO3 and Ag3VO4 with an increase in photocatalytic activity of WO3/Ag3VO4 that can be attributed to the efficient separation of photogenerated electron-hole pairs.

PVP-Assisted Synthesis and Enhanced Photocatalytic Activity of Ag/Ag3PO4 Composites

2013 ◽  
Vol 750-752 ◽  
pp. 1331-1334
Author(s):  
De Li Jiang ◽  
Min Chen ◽  
Ji Min Xie
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Ag Nanoparticles ◽  
Oxidation Mechanism ◽  
Precipitation Method ◽  
Highly Active ◽  
Level Of Activity ◽  
Visible Light Driven ◽  
High Level

In the present work, a highly active visible-light-driven Ag/Ag3PO4 photocatalyst was synthesized through a simple poly (vinylpyrrolidone) (PVP)-assisted precipitation method. It was found that the photodegradation activity of RhB over Ag/ Ag3PO4 is superior to pure Ag3PO4 due to the combination of Ag nanoparticles. Study of the photocatalytic mechanism revealed that the degradation of RhB under visible light irradiation over the as-prepared Ag/Ag3PO4 is mainly via the direct hole oxidation mechanism. The Ag/Ag3PO4 photocatalyst keeps a high level of activity even though it is used for five times.

CdS/Ag2S/g-C3N4 ternary composites with superior photocatalytic performance for hydrogen evolution under visible light irradiation

2021 ◽  
Vol 50 (9) ◽  
pp. 3253-3260 ◽  
Author(s):  
Shan Zhao ◽  
Junbiao Wu ◽  
Yan Xu ◽  
Xia Zhang ◽  
Yide Han ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Light Irradiation ◽  
Synergic Effect

CdS/Ag2S/g-C3N4 ternary composites showed excellent photocatalytic performance toward H2 evolution. Their improved photocatalytic activity could be attributed not only to the synergic effect, but also to the introduction of Ag2S.

Photocatalytic Degradation of Methylene Blue by NiO Thin Films under Solar Light Irradiation

2019 ◽  
Vol 56 ◽  
pp. 152-157 ◽  
Author(s):  
Abdelouahab Noua ◽  
Hichem Farh ◽  
Rebai Guemini ◽  
Oussama Zaoui ◽  
Tarek Diab Ounis ◽  
...  
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Visible Region ◽  
Optical Transmittance ◽  
Dip Coating ◽  
Light Irradiation ◽  
Solar Light ◽  
Solar Light Irradiation

Nickel oxide (NiO) thin films were successfully deposited by sol-gel dip-coating method on glass substrates. The structural, morphological and optical properties in addition to the photocatalytic activity of the prepared films were investigated. The results show that the films have a polycrystalline NiO cubic structure with dense NiO grains and average optical transmittance in the visible region. The photocatalytic properties of the films were studied through the degradation of methylene blue and 89% of degradation was achieved for 4.5h of solar light irradiation exposure which indicates the capability of NiO photocatalytic activity.

Photocatalytic activity of non-stoichiometric ZnFe2O4under visible light irradiation

2014 ◽  
Vol 89 (4) ◽  
pp. 044011 ◽  
Author(s):  
A Šutka ◽  
R Pärna ◽  
J Kleperis ◽  
T Käämbre ◽  
I Pavlovska ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation
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