Photodegradation of Metribuzin by Simulated Solar Light Irradiation

2012 ◽  
Vol 518-523 ◽  
pp. 436-439 ◽  
Author(s):  
Hui Liu ◽  
Le Guan
Keyword(s):  
Aqueous Solution ◽  
Organic Matter ◽  
Degradation Rate ◽  
Ph Value ◽  
Degradation Process ◽  
Potential Ecological Risk ◽  
Light Irradiation ◽  
Solar Light ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

Photolysis is expected to be a major degradation process for pollutants in surface water. This paper studied the photodegradation of metribuzin, a widely used herbicide, in aqueous solution under simulated solar light irradiation. Photolysis of metribuzin was enhanced by the higher light intensity, and the major products were deaminometribuzin and nitrite ions. Metribuzin degradation was inhibited in the absence of oxygen and at higher pH value. In addition, iron in water promoted the degradation of metribuzin, while dissolved organic matter lowered the degradation rate. This investigation is helpful for better understanding the transformation and the potential ecological risk of metribuzin in natural water.

Photocatalytic Activity of Solar-Light-Active N-Doped TiO2 by Sol-Gel Combustion Method

2014 ◽  
Vol 809-810 ◽  
pp. 800-806
Author(s):  
Xian Du ◽  
Hui Ling Du ◽  
Xiang Shi ◽  
Jin Wang ◽  
Jiao Jiao He
Keyword(s):  
Methyl Orange ◽  
Degradation Rate ◽  
Ph Value ◽  
Dye Degradation ◽  
Sol Gel ◽  
Light Irradiation ◽  
Solar Light ◽  
Tetrabutyl Titanate ◽  
Solar Light Irradiation ◽  
Gel Combustion

The present work was dedicated to the tailored synthesis of TiO2nanopowders doped with nitrogen (called TiO2−xNx) for the photocatalytic degradation of methyl orange. In particular, the systems were synthesized by a sol-gel combustion route starting from nitric acid and tetrabutyl titanate (Ti (OC4H9)4) as raw materials. The powders were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), suggesting that anatase phase is obtained at pH value of 4-6 and the heat-treated temperatures as low as 425°C. The photocatalytic activities of the N-doped TiO2nanopowders were monitored from the results of the degradation rate of methyl orange (MO) under solar light irradiation. The dependence of dye degradation rate on photocatalyst amount and initial pH was investigated. Under solar light irradiation, the TiO2doped with 30% N exhibited the highest photocatalytic reactivity, which could be attributed to the structure of the combustion-synthesized catalyst and the change of the bandgap induced by nitrogen inclusion.

Simultaneous photocatalytic redox removal of chromium(vi) and arsenic(iii) by hydrothermal carbon-sphere@nano-Fe3O4

2019 ◽  
Vol 6 (3) ◽  
pp. 937-947 ◽  
Author(s):  
Feng Liu ◽  
Weifang Zhang ◽  
Le Tao ◽  
Boyuan Hao ◽  
Jing Zhang
Keyword(s):  
Iron Oxide ◽  
Light Irradiation ◽  
Solar Light ◽  
Carbon Sphere ◽  
Simulated Solar Light ◽  
Chromium Vi ◽  
Solar Light Irradiation ◽  
Nano Fe3o4

The reduction of Cr(vi) and oxidation of As(iii) were markedly accelerated by employing iron oxide encapsulated in hydrothermal carbon sphere under simulated solar light irradiation.

Simultaneous evaporation and decontamination of water on a novel membrane under simulated solar light irradiation

2020 ◽  
Vol 267 ◽  
pp. 118695 ◽  
Author(s):  
Zhao Gao ◽  
Hanpei Yang ◽  
Jingwei Li ◽  
Li Kang ◽  
Lina Wang ◽  
...  
Keyword(s):  
Light Irradiation ◽  
Solar Light ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

Nonmetal–metal–semiconductor-promoted P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst with superior photocatalytic activity and stability

2015 ◽  
Vol 3 (34) ◽  
pp. 17858-17865 ◽  
Author(s):  
Xiaohong Hu ◽  
Qi Zhu ◽  
Xinlong Wang ◽  
Naoki Kawazoe ◽  
Yingnan Yang
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Light Irradiation ◽  
Solar Light ◽  
Tio2 Photocatalyst ◽  
Photocatalytic Ability ◽  
Composite Photocatalyst ◽  
Gel Method ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

P/Ag/Ag2O/Ag3PO4/TiO2 composite photocatalyst has been successfully prepared by a sol–gel method. It shows highly enhanced photocatalytic ability and stability under simulated solar light irradiation.

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