scholarly journals Stannic Oxide-Titanium Dioxide Coupled Semiconductor Photocatalyst Loaded with Polyaniline for Enhanced Photocatalytic Oxidation of 1-Octene

2007 ◽  
Vol 2007 ◽  
pp. 1-6 ◽  
Author(s):  
Hadi Nur ◽  
Izan Izwan Misnon ◽  
Lim Kheng Wei
Keyword(s):  
Electrical Conductivity ◽  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Charge Separation ◽  
Photocatalytic Oxidation ◽  
High Photocatalytic Activity ◽  
Stannic Oxide ◽  
Aqueous Hydrogen Peroxide ◽  
Semiconductor Photocatalyst ◽  
Coupled Semiconductor

Stannic oxide-titanium dioxide (SnO2–TiO2) coupled semiconductor photocatalyst loaded with polyaniline (PANI), a conducting polymer, possesses a high photocatalytic activity in oxidation of 1-octene to 1,2-epoxyoctane with aqueous hydrogen peroxide. The photocatalyst was prepared by impregnation ofSnO2and followed by attachment of PANI onto aTiO2powder to give sample PANI-SnO2–TiO2. The electrical conductivity of the system becomes high in the presence of PANI. Enhanced photocatalytic activity was observed in the case of PANI-SnO2–TiO2compared to PANI-TiO2,SnO2–TiO2, andTiO2. A higher photocatalytic activity in the oxidation of 1-octene on PANI-SnO2–TiO2thanSnO2–TiO2, PANI-TiO2, andTiO2can be considered as an evidence of enhanced charge separation of PANI-SnO2–TiO2photocatalyst as confirmed by photoluminescence spectroscopy. It suggests that photoinjected electrons are tunneled fromTiO2toSnO2and then to PANI in order to allow wider separation of excited carriers.

Greatly enhanced photocatalytic activity by organic flexible piezoelectric PVDF induced spatial electric field

2017 ◽  
Vol 7 (23) ◽  
pp. 5594-5601 ◽  
Author(s):  
Baoying Dai ◽  
Hengming Huang ◽  
Wei Wang ◽  
Yukai Chen ◽  
Chunhua Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Electric Field ◽  
Charge Separation ◽  
High Photocatalytic Activity ◽  
Efficient Charge ◽  
Vital Factor

Efficient charge separation accelerated by a spatial electric field is a vital factor for semiconductor photocatalysts to achieve high photocatalytic activity.

Bio-templated synthesis of hierarchically ordered macro-mesoporous anatase titanium dioxide flakes with high photocatalytic activity

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15572-15578 ◽  
Author(s):  
Bing Li ◽  
Jianquan Zhao ◽  
Jing Liu ◽  
Xinyu Shen ◽  
Shaobo Mo ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Templated Synthesis ◽  
Rose Petals

Hierarchically ordered macro-mesoporous anatase TiO2 flakes were synthesized by using rose petals and P123 as dual templates with high photocatalytic activity.

scholarly journals Insights into a rutile/brookite homojunction of titanium dioxide: separated reactive sites and boosted photocatalytic activity

RSC Advances ◽  
2019 ◽  
Vol 9 (63) ◽  
pp. 36615-36620 ◽  
Author(s):  
Jing Chen ◽  
Meili Guan ◽  
Xuan Zhang ◽  
Xuezhong Gong
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Charge Separation ◽  
Redox Reactions ◽  
Separation Efficiency ◽  
Charge Separation Efficiency

Reactive sites for redox reactions were spatially separated using a rutile/brookite homojunction, thus contributing to improved charge separation efficiency.

K2TiO(C2O4)2-mediated synthesis of rutile TiO2 mesocrystals and their ability to assist photodegradation of sulfosalicylic acid in water

RSC Advances ◽  
2014 ◽  
Vol 4 (90) ◽  
pp. 49280-49286 ◽  
Author(s):  
Lu-Lu Lai ◽  
Li-Liang Huang ◽  
Jin-Ming Wu
Keyword(s):  
Photocatalytic Activity ◽  
Low Temperature ◽  
Specific Surface ◽  
Charge Separation ◽  
Atmospheric Pressure ◽  
High Photocatalytic Activity ◽  
Large Specific Surface Area ◽  
Sulfosalicylic Acid ◽  
Temperature Solution ◽  
Solution Route

Flower-like rutile TiO2 mesocrystals were synthesized by a K2TiO(C2O4)2-mediated low temperature solution route under the atmospheric pressure, which exhibited high photocatalytic activity because of the large specific surface area as well as the high charge separation rate inherent from the single crystal nature.

scholarly journals Thermally modified titania photocatalysts for phenol removal from water

2006 ◽  
Vol 2006 ◽  
pp. 1-7 ◽  
Author(s):  
Joanna Grzechulska-Damszel ◽  
Antoni W. Morawski ◽  
Barbara Grzmil
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Thermal Treatment ◽  
Photocatalytic Oxidation ◽  
Thermal Modification ◽  
Photocatalytic Decomposition ◽  
Phenol Removal ◽  
Chemical Factory ◽  
Degussa P25 ◽  
Oxidation Of Phenol

Two kinds of titanium dioxide were used as starting materials for thermal modification: Tytanpol A11 supplied by Chemical Factory “Police” S.A. (Poland) and Degussa P25 supplied by Degussa AG (Germany). The photocatalytic activity of titania materials modified by thermal treatment was tested in the reaction of photocatalytic oxidation of phenol. It was found that the highest activity in the reaction of photocatalytic decomposition of phenol, in case of Tytanpol A11, shows the samples of material modified at temperatures of 700 and 750°C. These catalysts were more active than untreated A11, whereas materials modified at higher temperatures show lower activity. In the case of P25, all thermally treated materials were less active than the unmodified material. The photocatalyst samples were characterized by UV-Vis/DR, FTIR/DRS, and XRD methods.

Fabrication of TiO2 nanosheets via Ti3+ doping and Ag3PO4 QD sensitization for highly efficient visible-light photocatalysis

RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 63984-63990 ◽  
Author(s):  
Lu Ma ◽  
Hong Han ◽  
Lun Pan ◽  
Muhammad Tahir ◽  
Li Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Charge Separation ◽  
Separation Efficiency ◽  
High Photocatalytic Activity ◽  
Visible Light Photocatalysis ◽  
High Charge ◽  
Highly Efficient ◽  
Tio2 Nanosheets ◽  
Charge Separation Efficiency

Ag3PO4 QDs sensitized and Ti3+-doped TiO2 nanosheets were fabricated, and exhibit high charge-separation efficiency and high photocatalytic activity.

High Photocatalytic Activity Nanomaterials Based on Titanium Dioxide

2019 ◽  
Vol 14 (5-6) ◽  
pp. 190-196
Author(s):  
E. A. Konstantinova ◽  
M. P. Kushnikov ◽  
V. B. Zaitsev ◽  
V. G. Kytin ◽  
A. V. Marikutsa ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
High Photocatalytic Activity

scholarly journals Photocatalytic Degradation of Sulfamethoxazole, Nitenpyram and Tetracycline by Composites of Core Shell g-C3N4@ZnO, and ZnO Defects in Aqueous Phase

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2609
Author(s):  
Godfred Kwesi Teye ◽  
Jingyu Huang ◽  
Yi Li ◽  
Ke Li ◽  
Lei Chen ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Photocatalytic Activity ◽  
Light Absorption ◽  
Charge Separation ◽  
Absorption Efficiency ◽  
High Photocatalytic Activity ◽  
High Load ◽  
Core Shell ◽  
Visible Light Absorption ◽  
Load Separation

The synthesis of photocatalysts with high charge separation and transfer efficiency are of immense significance in the process of using photocatalysis technology for wastewater treatment. In this study core shell g-C3N4@ZnO, and ZnO defects photocatalysts presented an improved morphology in its characterization using techniques such as SEM, DRS, PL, MS, EIS, and XRD, and enhanced photodegradation of sulfamethoxazole, Nitenpyram and Tetracycline. Different composites were obtained as confirmed by the various characterization techniques studied, including core shell g-C3N4@ZnO, and ZnO defects photocatalyst. The synthesized photocatalysts showed high visible light absorption efficiency within a range of ~655 to 420 nm. Core shell g-C3N4@ZnO, and ZnO defects photocatalysts demonstrated high photocatalytic activity ascribed to high load separation and transition as shown in PL, Photocurrent reaction and EIS. It is understandable that core shell g-C3N4@ZnO, and ZnO defects photocatalysts have been confirmed to be one of the ultimate promising entrants for photocatalyst scheming.

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