Reusable iron sulfide nanospheres towards promoted photocatalytic and electrocatalytic activities

2017 ◽  
Vol 41 (18) ◽  
pp. 10083-10095 ◽  
Author(s):  
Bibhutibhushan Show ◽  
Nillohit Mukherjee ◽  
Anup Mondal
Keyword(s):  
Hydrogen Peroxide ◽  
Visible Light ◽  
Iron Sulfide ◽  
Sensing Properties ◽  
Electrochemically Deposited

Electrochemically deposited FeS nanospheres were found to degrade efficiently a series of toxic pigments and phenol in the presence of visible light. The material also showed excellent hydrogen peroxide sensing properties.

Degradation of natural toxins by phthalocyanines–example of cyanobacterial toxin, microcystin

2010 ◽  
Vol 62 (2) ◽  
pp. 273-278 ◽  
Author(s):  
Daniel Jančula ◽  
Lucie Bláhová ◽  
Marie Karásková ◽  
Blahoslav Maršálek
Keyword(s):  
Reactive Oxygen Species ◽  
Hydrogen Peroxide ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Oxygen Species ◽  
Cyanobacterial Toxin ◽  
Natural Toxins ◽  
Peptide Toxins ◽  
Near Future ◽  
Absorption Characteristics

Phthalocyanines (Pcs) are promising photosensitizers for use in various branches of science and industry. In the presence of visible light and diatomic oxygen, phthalocyanines can react to produce singlet oxygen, a member of reactive oxygen species able to damage different molecules and tissues. The aim of this study was to investigate the ability of phthalocyanines to degrade natural toxins in the presence of visible light. As the representative of hardly degradable toxins, a group of cyanobacterial peptide toxins—microcystin-LR—was chosen for this study. According to our results, phthalocyanines are able to degrade 61,5% of microcystins within a 48-hour incubation (38% of microcystins was degraded after 24 h and 24% after 12 h of incubation). Although other oxidants like hydrogen peroxide or ozone are able to degrade microcystins within several hours, we assume that by optimizing the spectrum emitted by light source and by changing the absorption characteristics of Pcs, microcystins degradation by phthalocyanines could be more effective in the near future.

scholarly journals Electrochemically deposited poly(selenophene)-fullerene photoactive layer: Tuning of the spectroscopic properties towards visible light-driven generation of singlet oxygen

2020 ◽  
Vol 525 ◽  
pp. 146594
Author(s):  
Aleksandra Nyga ◽  
Radoslaw Motyka ◽  
Gianlorenzo Bussetti ◽  
Alberto Calloni ◽  
Madan Sangarashettyhalli Jagadeesh ◽  
...  
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Spectroscopic Properties ◽  
Photoactive Layer ◽  
Electrochemically Deposited ◽  
Visible Light Driven

Photoreaktivierung von UV-inaktivierter Polyuridylsäure

1964 ◽  
Vol 19 (5) ◽  
pp. 406-408 ◽  
Author(s):  
Adolf Wacker ◽  
Makoto Ishimoto ◽  
Prakash Chandra ◽  
Reinhold Selzer
Keyword(s):  
Hydrogen Peroxide ◽  
Visible Light ◽  
Uv Irradiation ◽  
Trichloroacetic Acid ◽  
Uranyl Acetate ◽  
Free System ◽  
E Coli ◽  
Polyuridylic Acid ◽  
A Cell ◽  
The One

A study on the effect of UV-irradiated polyuridylic acid on the incorporation of phenylalanine into the polypeptide precipitable through trichloroacetic acid, in a cell-free system from E. coli was made. Attempts were made to reactivate the UV-inactivated polyuridylic acid through hydrogen peroxide, uranyl acetate and visible light. We could show that polyuridylic acid irradiated at a dose of 1.2 ×105 ergs/mm2 could be completely reactivated, while the one irradiated at a higher dose of 2.4 ×105 ergs/mm2 could not be completely reactivated under the conditions of our experiment. We have studied the effects of hydrogen peroxide and uranyl acetate on UV-irradiated polyuridylic acid chemically as well. Our results altogether show that the photoreactivating effect of uranyl acetate and hydrogen peroxide is due to their ability to split the uracil dimers formed during UV-irradiation.

Sign in / Sign up

Export Citation Format

Share Document