Photocatalytic degradation of ethylene using titanium dioxide nanotube arrays with Ag and reduced graphene oxide irradiated by γ-ray radiolysis

2017 ◽  
Vol 203 ◽  
pp. 673-683 ◽  
Author(s):  
Quan Zhang ◽  
Shengying Ye ◽  
Xuemei Chen ◽  
Xianliang Song ◽  
Liqin Li ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Photocatalytic Degradation ◽  
Reduced Graphene Oxide ◽  
Nanotube Arrays ◽  
Reduced Graphene ◽  
Titanium Dioxide Nanotube Arrays ◽  
Γ Ray

scholarly journals Synthesis of cobalt doping titanium dioxide fiber supported by reduced graphene oxide for photocatalytic degradation of toluene in air

2021 ◽  
Author(s):  
Shuai Chen ◽  
Fei Long ◽  
Guilan Gao ◽  
Jie Guan ◽  
Yaoguang Guo ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Photocatalytic Degradation ◽  
Reduced Graphene Oxide ◽  
Organic Pollutants ◽  
Utilization Rate ◽  
Cobalt Doping ◽  
Doping Amount ◽  
Co Doping ◽  
Reduced Graphene

Abstract Titanium dioxide has been widely used for photocatalytic degradation of organic pollutants in air, while problems like low utilization rate of sunlight and easy recombination of photogenerated electrons and holes are the main drawbacks for its application. In this study, a combination of Co doping and graphene supporting was used to synthesize cobalt doping titanium dioxide fiber supported by reduced graphene oxide (Co-TiO2/RGO) using processes including electrospinning, heating and freeze-drying. The structural and textural features of Co-TiO2/RGO were characterized by different techniques, and toluene was used as a model pollutant to test its photocatalytic performance. Results show that Co-TiO2 is uniformly dispersed in reduced grapheme oxide and the specific surface area of Co-TiO2/RGO is higher than that of TiO2 and Co-TiO2. Further, under the conditions of Co doping amount of 1%, calcination of 600℃ for 4 h, gas residence time of 100 min, relative humidity of 100%, and the Co-TiO2 loading amount of 1 g, the degradation percentage of toluene by Co-TiO2/RGO was the highest, up to 99.1%. This study confirms the possibility of synthesizing Co-TiO2/RGO for the degradation of organic pollutants in air.

scholarly journals Nano Silver-Iron-Reduced Graphene Oxide Modified Titanium Dioxide Photocatalytic Remediation System for Organic Dye

Environments ◽  
2019 ◽  
Vol 6 (9) ◽  
pp. 106 ◽  
Author(s):  
Sass ◽  
Mouele ◽  
Ross
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Photocatalytic Degradation ◽  
Reduced Graphene Oxide ◽  
Cost Effective ◽  
The Novel ◽  
Composite Catalysts ◽  
Reduced Graphene ◽  
Increasing Demand ◽  
Enhanced Surface

The organic water contaminant, methyl orange contaminant (M.O), has shown a hazardous increase in our water systems over the past few years due to its increasing demand in industrial processes. The photocatalytic degradation of the commercial dye was studied through the application of modified TiO2 composite catalysts in aqueous solution under artificial irradiation. The improvement of photocatalytic activity is strongly affected by the various functional groups emerging in the organic substances. In this work, the effect of both silver-iron and silver-iron-reduced graphene oxide-modified titanium dioxide towards M.O remediation as a cost-effective photocatalyst was investigated. We confirmed that the novel AgFe functionalized TiO2 catalyst (AgFe-TiO2) showed more superior remediation activity than the reduced graphene oxide (rGO)-modified TiO2 due to the decreased band gap from 3.02 eV–2.5 eV with increased photocatalysis. Based on the spectroscopic and microscopic results, the enhanced photocatalytic degradation of M.O dye was induced by its enhanced surface area, electron diffusion, and the reduction of photo-generated electron-hole pairs’ recombination.

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