Titanium dioxide‐coated biochar composites as adsorptive and photocatalytic degradation materials for the removal of aqueous organic pollutants

2017 ◽  
Vol 93 (3) ◽  
pp. 783-791 ◽  
Author(s):  
Xiaoxi Cai ◽  
Jiang Li ◽  
Yunguo Liu ◽  
Zhili Yan ◽  
Xiaofei Tan ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Organic Pollutants

Recent developments in photocatalytic degradation of insecticides and pesticides

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Santosh Kumar Singh ◽  
Pradeep Kumar Mishra ◽  
Siddh Nath Upadhyay
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Half Life ◽  
Chemical Oxidation ◽  
Future Research ◽  
Research Groups ◽  
Permissible Limits ◽  
The Past ◽  
Recent Developments

Abstract Widespread use of pesticides in agricultural and domestic sectors and their long half-life have led to their accumulation in the environment beyond permissible limits. Advanced chemical oxidation methods including photocatalytic degradation are being widely investigated for their mineralization. Photocatalytic degradation is the most promising method for degrading pesticides as well as other organic pollutants. Titanium dioxide with or without modification has been widely used as the photocatalyst. Some research groups have also tried other photocatalysts. This review presents a critical summary of the research results reported during the past two decades as well as the scope for future research in this area.

Photocatalytic degradation of organic pollutants from wastewater using aluminium doped titanium dioxide

2019 ◽  
Vol 27 ◽  
pp. 177-184 ◽  
Author(s):  
Nathaporn Areerachakul ◽  
Singto Sakulkhaemaruethai ◽  
M.A.H. Johir ◽  
Jaya Kandasamy ◽  
S. Vigneswaran
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Doped Titanium Dioxide

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 Stabilization of nanosized titanium dioxide by cyclodextrin polymers and its photocatalytic effect on the degradation of wastewater pollutants

2016 ◽  
Vol 12 ◽  
pp. 2873-2882 ◽  
Author(s):  
Tamás Zoltán Agócs ◽  
István Puskás ◽  
Erzsébet Varga ◽  
Mónika Molnár ◽  
Éva Fenyvesi
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Synergistic Effects ◽  
Tap Water ◽  
The Other ◽  
Cyclodextrin Derivatives ◽  
Nanosized Titanium Dioxide ◽  
Other Hand

Advanced oxidation processes (AOPs) are considered highly competitive water treatment technologies for the removal of organic pollutants. Among AOP techniques, photocatalysis has recently been the most widely studied. Our aims were to investigate how the dispersion of nanosized titanium dioxide (nanoTiO2) applied in photodegradation-based procedures can be stabilized with cyclodextrins in order to obtain a new, more efficient photocatalyst for the purification of waters polluted by xenobiotics applying UV irradiation. During our work, on the one hand, we studied the behavior and stability of nanoTiO2 in cyclodextrin solutions. On the other hand, we used various monomer and polymer cyclodextrin derivatives, and assessed the options for nanoTiO2 stabilization in the presence of various salts and tap water on the basis of turbidity tests. The physical stability of nanoTiO2 dispersions is diminished in the presence of the salts found in tap water (and occurring also in surface waters and ground water) and they are precipitated immediately. This colloidal instability can be improved by cyclodextrin derivatives. Based on the results of our studies we have selected carboxymethyl β-cyclodextrin polymer (CMBCD-P) for stabilization of nanoTiO2 dispersions. The photocatalytic degradation of methylene blue and ibuprofen as model organic pollutants in various media (distilled water, NaCl solution and tap water) has been studied using nanoTiO2 as catalyst stabilized by CMBCD-P. CMBCD-P itself showed a catalytic effect on the UV degradation of methylene blue. In addition to enhancing the colloid stability of nanoTiO2 CMBCD-P showed also synergistic effects in catalyzing the photodecomposition process of the dye. On the other hand, ibuprofen as a model pharmaceutical, a pollutant of emerging concern (EP), was protected by CMBCD-P against the photocatalytic degradation showing that inclusion complex formation can result in opposite effects depending on the structure of the host–guest complex.

Photocatalytic Degradation of Organic Pollutants by Using Nanocrystalline Boron‐doped TiO 2 Catalysts

2021 ◽  
Vol 6 (14) ◽  
pp. 3360-3369
Author(s):  
Rani P. Barkul ◽  
Radhakrishna S. Sutar ◽  
Meghshyam K. Patil ◽  
Sagar D. Delekar
Keyword(s):  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Boron Doped
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