Synthesis of BiOBr/carbon quantum dots microspheres with enhanced photoactivity and photostability under visible light irradiation

2016 ◽  
Vol 527 ◽  
pp. 127-136 ◽  
Author(s):  
Chenhui Zhao ◽  
Wei Li ◽  
Ying Liang ◽  
Yi Tian ◽  
Qiuyu Zhang
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Carbon Quantum Dots ◽  
Light Irradiation

Antibacterial Nanorods Made of Carbon Quantum Dots-ZnO Under Visible Light Irradiation

2019 ◽  
Vol 19 (7) ◽  
pp. 3982-3990 ◽  
Author(s):  
Weicong Kuang ◽  
Qing Zhong ◽  
Xiaoli Ye ◽  
Yayuan Yan ◽  
Yunhua Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Carbon Quantum Dots ◽  
Light Irradiation

scholarly journals Synthesis of Carbon Doped TiO2 Quantum Dots for Photocatalytic Sterilization under the Visible Light Irradiation and the Mechanisms

2019 ◽  
Vol 118 ◽  
pp. 01013 ◽  
Author(s):  
Wei Xiong ◽  
Altair T.F. Cheung ◽  
Michael K.H. Leung
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Superoxide Radical ◽  
Light Irradiation ◽  
Doping Amount ◽  
E Coli ◽  
Carbon Doped ◽  
Chemical States ◽  
Self Protection

In this article, the carbon doped TiO2 (C-TiO2) quantum dots (QDs) were prepared through the hydrothermal method and calcination. The size of the C-TiO2 QDs is about 5.7 nm. The doping amount of carbon can be tuned by adjusting the volumes of the carbon source, ethylene glycol added. The carbon atoms are proved to be doped into the interstitial sites of TiO2 lattice and induce the change of chemical states of Ti 2p and C 1s. The doping of carbon leads to the increasing photocatalytic sterilization of E. coli under the visible light irradiation. The survival rate of E. coli cells over C-TiO2 is only 1.5 % after 6 h. The reactive oxygen species (ROS), such as hydroxyl radical and superoxide radical, are considered as the primary factors for the photocatalytic sterilization. Due to oxidative stress of the attack by ROS, the enzyme activity per cells increases for self-protection during the photocatalytic sterilization.

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