Weakened negative effect of Au/TiO2 photocatalytic activity by CdS quantum dots deposited under UV-vis light illumination at different intensity ratios

2016 ◽  
Vol 18 (42) ◽  
pp. 29131-29138 ◽  
Author(s):  
Kang Song ◽  
Xiaohong Wang ◽  
Qun Xiang ◽  
Jiaqiang Xu
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Au Nanoparticles ◽  
Light Illumination ◽  
Cds Quantum Dots ◽  
System P ◽  
Negative Effect ◽  
Intensity Ratios

Herein, we have experimentally demonstrated the coexistence of photocatalytic dual opposite roles of Au nanoparticles in a UV-vis light irradiated Au/TiO2 system.

Facile one-step sonochemical synthesis of AgCl quantum dots with enhanced photocatalytic activity and its size effects

2020 ◽  
Vol 13 (06) ◽  
pp. 2051036
Author(s):  
Junjie Zhang ◽  
Hujiabudula Maimaitizi ◽  
Tao Zhang ◽  
Yalkunjan Tursun ◽  
Dilinuer Talifu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Band Gap ◽  
Size Effects ◽  
Ultrasonic Method ◽  
Energy Levels ◽  
Average Diameter ◽  
Light Illumination ◽  
Quantum Size ◽  
One Step

In this work, a facile ultrasonic method for the fabrication of AgCl quantum dots (AgCl QDs) with an average diameter of about 2.5[Formula: see text]nm was reported for the first time. The material was analyzed by various techniques. In addition, effects of material’s size on its photocatalytic activities were studied. Results suggested that the AgCl QDs exhibited excellent photocatalytic activity to degrade Rhodamine B (RhB) and tetracycline (TC) under visible light illumination, and the degradation rate of RhB (TC) had reached up to 96.6% (72.2%) in 20 min, which was higher than that of AgCl nanoparticles (23[Formula: see text]nm) and AgCl nanospheres (114[Formula: see text]nm), respectively. Besides, the band gap of the material was increased when the size of material decreased from 23[Formula: see text]nm to 2.5[Formula: see text]nm. The significantly improved photocatalytic performance and increased band gap of AgCl QDs were mainly related to the quantum size effects of AgCl, which results in the more electron fluctuation in quantized energy levels and the lower recombination of electrons and holes.

Hierarchical microspheres: in situ assembly of CdS quantum dots on Cd2SnO4 nanosheets with enhanced visible light photocatalytic properties

RSC Advances ◽  
2015 ◽  
Vol 5 (102) ◽  
pp. 83922-83930 ◽  
Author(s):  
Guimin Zhang ◽  
Zhengyi Fu ◽  
Yucheng Wang ◽  
Hao Wang ◽  
Zheng Xie
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Properties ◽  
Cds Quantum Dots ◽  
Solvothermal Route ◽  
Hierarchical Microspheres ◽  
One Step ◽  
Visible Light Photocatalytic

Hierarchical CdS/Cd2SnO4 microspheres with enhanced photocatalytic activity were successfully synthesized by one step solvothermal route.

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