Comparing Photocatalytic Degradation of Gaseous Ethylbenzene Using N-doped and Pure TiO2 Nano-Catalysts Coated on Glass Beads under Both UV and Visible Light Irradiation

Kamaei, Morteza; Rashedi, Hamid; Dastgheib, Seyed Mohammad Mehdi; Tasharrofi, Saeideh

doi:10.3390/catal8100466

Cited by 30 publications

(14 citation statements)

References 38 publications

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“…In the profenofos molecule, the bond lengths between P 13 -S 15 , C 6 -Br 10 , C 2 -Cl 11 , P 13 -O 26 and P 13 -O 12 are 2.1100 × 10 −10 , 1.91000 × 10 −10 , 1.78000 × 10 −10 , 1.76000 × 10 −10 , 1.76000 × 10 −10 , and 1.76000 × 10 −10 m, respectively, which are longer than other bonds. Similarly, the bond lengths between P 19 -S 20 in the triazophos molecule is the longest with the value of 1.85680 × 10 −10 m, followed by the bond lengths between P 19 -O 18 , P 19 -O 21 and P 19 -O 22 with the same value of 1.76000 × 10 −10 m. According to negative A major metabolic product of profenofos, 4-bromo-2-chlorophenol was widely reported in the photolysis [37], hydrolysis [38], and biodegradation [39,40]. However, there has been no relevant report on photocatalytic degradation products of profenofos using TiO 2 .…”

Section: Degradation Byproducts and Molecular Structurementioning

confidence: 93%

“…In the profenofos molecule, the bond lengths between P 13 -S 15 , C 6 -Br 10 , C 2 -Cl 11 , P 13 -O 26 and P 13 -O 12 are 2.1100 × 10 −10 , 1.91000 × 10 −10 , 1.78000 × 10 −10 , 1.76000 × 10 −10 , 1.76000 × 10 −10 , and 1.76000 × 10 −10 m, respectively, which are longer than other bonds. Similarly, the bond lengths between P 19 -S 20 in the triazophos molecule is the longest with the value of 1.85680 × 10 −10 m, followed by the bond lengths between P 19 -O 18 , P 19 -O 21 and P 19 -O 22 with the same value of 1.76000 × 10 −10 m. According to negative correlation between bond energy and bond length [49], the above longer bonds tend to cleave when attacked by ROS. This means the P 13 -O 12 bond in the profenofos molecule and the P 19 -O 18 bond in triazophos molecules are attacked first, leading to the P 13 14 1.45200 C 16 -C 17 1.50715 P 13 -O 26 1.76000 C 17 -C20 1.50713 P 13 -O 12 1.76000 O 26 -C 27 1.43000 P 13 -S 15 2.11000 C 27 -C 28 1.50025 C 16 -S 15 1.78000 O 12 -C 3 1.43000 C 3 -C 4 1.39543 C 1 -C 2 1.39516 C 4 -C 5 1.39483 C 2 -Cl 11 1.76000 C 5 -C 6 1.39514 C 2 -C 3 1.39471 C 6 -Br 10 1.91000 C 6 -C 1 1.39483…”

Section: Degradation Byproducts and Molecular Structurementioning

confidence: 93%

“…Triazophos P 19 -S 20 1.85680 N 3 -C 7 1.47000 P 19 -O 18 1.76000 C 7 -C 8 1.39516 P 19 -O 21 1.76000 C 7 -C 9 1.39483 P 19 -O 22 1.76000 C 8 -C 10 1.39471 O 18 -C 1 1.43000 C 9 -C 12 1.39514 C 1 -N 5 1.40175 C 10 -C 14 1.39543 C 1 -N 6 1.43487 C 12 -C 14 1.39483 C 2 -N 6 1.40185 O 21 -C 30 1.43000 C 2 -N 3 1.39180 O 22 -C 23 1.43000 N 3 -N 5 1.39180 C 30 -C 31 1.50025 C 23 -C 24 1.50025…”

Section: Degradation Byproducts and Molecular Structureunclassified

“…Bond Bond Length (×10 −10 m) Bond Bond Length (×10 −10 m) Profenofos P 13 -O 14 1.45200 C 16 -C 17 1.50715 P 13 -O 26 1.76000 C 17 -C20 1.50713 P 13 -O 12 1.76000 O 26 -C 27 1.43000 P 13 -S 15 2.11000 C 27 -C 28 1.50025 C 16 -S 15 1.78000 O 12 -C 3 1.43000 C 3 -C 4 1.39543 C 1 -C 2 1.39516 C 4 -C 5 1.39483 C 2 -Cl 11 1.76000 C 5 -C 6 1.39514 C 2 -C 3 1.39471 C 6 -Br 10 1.91000 C 6 -C 1 1.39483 Triazophos P 19 -S 20 1.85680 N 3 -C 7 1.47000 P 19 -O 18 1.76000 C 7 -C 8 1.39516 P 19 -O 21 1.76000 C 7 -C 9 1.39483 P 19 -O 22 1.76000 C 8 -C 10 1.39471 O 18 -C 1 1.43000 C 9 -C 12 1.39514 C 1 -N 5 1.40175 C 10 -C 14 1.39543 C 1 -N 6 1.43487 C 12 -C 14 1.39483 C 2 -N 6 1.40185 O 21 -C 30 1.43000 C 2 -N 3 1.39180 O 22 -C 23 1.43000 N 3 -N 5 1.39180 C 30 -C 31 1.50025 C 23 -C 24 1.50025…”

Section: Pesticidementioning

confidence: 99%

“…To enhance the photocatalytic activity under the visible light, main-group element (Ce, N, C, Ag, etc.) doped nano TiO 2 was extensively applied [17][18][19][20]. Among them, Cerium-doped nano TiO 2 (TiO 2 /Ce) exhibits a strong photocatalytic capability under the visible lights [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Degradation of Profenofos and Triazophos Residues in the Chinese Cabbage, Brassica chinensis, Using Ce-Doped TiO2

et al. 2019

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Pesticides have revolutionized the modern day of agriculture and substantially reduced crop losses. Synthetic pesticides pose a potential risk to the ecosystem and to the non-target organisms due to their persistency and bioaccumulation in the environment. In recent years, a light-mediated advanced oxidation processes (AOPs) has been adopted to resolve pesticide residue issues in the field. Among the current available semiconductors, titanium dioxide (TiO2) is one of the most promising photocatalysts. In this study, we investigated the photocatalytic degradation of profenofos and triazophos residues in Chinese cabbage, Brassica chinensis, using a Cerium-doped nano semiconductor TiO2 (TiO2/Ce) under the field conditions. The results showed that the degradation efficiency of these organophosphate pesticides in B. chinensis was significantly enhanced in the presence of TiO2/Ce. Specifically, the reactive oxygen species (ROS) contents were significantly increased in B. chinensis with TiO2/Ce treatment, accelerating the degradation of profenofos and triazophos. Ultra-performance liquid chromatography–mass spectroscopy (UPLC-MS) analysis detected 4-bromo-2-chlorophenol and 1-phenyl-3-hydroxy-1,2,4-triazole, the major photodegradation byproducts of profenofos and triazophos, respectively. To better understand the relationship between photodegradation and the molecular structure of these organophosphate pesticides, we investigated the spatial configuration, the bond length and Mulliken atomic charge using quantum chemistry. Ab initio analysis suggests that the bonds connected by P atom of profenofos/triazophos are the initiation cleavage site for photocatalytic degradation in B. chinensis.

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Section: Degradation Byproducts and Molecular Structurementioning

confidence: 93%

“…In the profenofos molecule, the bond lengths between P 13 -S 15 , C 6 -Br 10 , C 2 -Cl 11 , P 13 -O 26 and P 13 -O 12 are 2.1100 × 10 −10 , 1.91000 × 10 −10 , 1.78000 × 10 −10 , 1.76000 × 10 −10 , 1.76000 × 10 −10 , and 1.76000 × 10 −10 m, respectively, which are longer than other bonds. Similarly, the bond lengths between P 19 -S 20 in the triazophos molecule is the longest with the value of 1.85680 × 10 −10 m, followed by the bond lengths between P 19 -O 18 , P 19 -O 21 and P 19 -O 22 with the same value of 1.76000 × 10 −10 m. According to negative correlation between bond energy and bond length [49], the above longer bonds tend to cleave when attacked by ROS. This means the P 13 -O 12 bond in the profenofos molecule and the P 19 -O 18 bond in triazophos molecules are attacked first, leading to the P 13 14 1.45200 C 16 -C 17 1.50715 P 13 -O 26 1.76000 C 17 -C20 1.50713 P 13 -O 12 1.76000 O 26 -C 27 1.43000 P 13 -S 15 2.11000 C 27 -C 28 1.50025 C 16 -S 15 1.78000 O 12 -C 3 1.43000 C 3 -C 4 1.39543 C 1 -C 2 1.39516 C 4 -C 5 1.39483 C 2 -Cl 11 1.76000 C 5 -C 6 1.39514 C 2 -C 3 1.39471 C 6 -Br 10 1.91000 C 6 -C 1 1.39483…”

Section: Degradation Byproducts and Molecular Structurementioning

confidence: 93%

Section: Degradation Byproducts and Molecular Structureunclassified

Section: Pesticidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Degradation of Profenofos and Triazophos Residues in the Chinese Cabbage, Brassica chinensis, Using Ce-Doped TiO2

et al. 2019

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Experimental Study of Benzene Catalytic Combustion over Cu–Mn‐Ce/Al2O3 Particles

Wang

Yang

et al. 2020

ChemistrySelect

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Low concentration benzene is one of major components of volatile organic compounds (VOCs) which pollutes atmosphere. In this study, the influence of addition of cerium(Ce) and manganese(Mn) on alumina supported copper catalyst(Cu/γ‐Al2O3) for benzene combustion is studied, using X‐ray diffraction pattern (XRD), scanning electron microscopy (SEM) coupled with Energy‐dispersive X‐ray (EDX), hydrogen‐temperature programmed reduction(H2‐TPR) and Fourier transform infrared spectroscopy(FTIR). The Cu−Mn‐Ce catalyst with a molar ratio of 1:1.5:0.5 and 10% capacity exhibited catalytic performance with calcination temperature of 600 °C and gas hourly space velocity (GHSV) which is less than 2 h−1. Ce improves the formation of lattice oxygen(Olatt) while Mn is beneficial for the augment of surface oxygen(Osur) and adsorbed oxygen(Oads). Synergistic effect of Mn and Ce can further increase the content of surface oxygen and adsorbed oxygen, which improves catalytic activity. The inferred benzene combustion process is as follows: break of the C−H bound→ the breakage of benzene ring through the breaking of the C−C bond and the C=C bond→ generation of water and carbon dioxide.

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Heterogeneous Photocatalysis for Indoor Air Purification: Recent Advances in Technology from Material to Reactor Modeling

Lekshmi

Nagendra

Maiya

2020

Lecture Notes in Civil Engineering

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Comparing Photocatalytic Degradation of Gaseous Ethylbenzene Using N-doped and Pure TiO2 Nano-Catalysts Coated on Glass Beads under Both UV and Visible Light Irradiation

Cited by 30 publications

References 38 publications

Photocatalytic Degradation of Profenofos and Triazophos Residues in the Chinese Cabbage, Brassica chinensis, Using Ce-Doped TiO2

Photocatalytic Degradation of Profenofos and Triazophos Residues in the Chinese Cabbage, Brassica chinensis, Using Ce-Doped TiO2

Experimental Study of Benzene Catalytic Combustion over Cu–Mn‐Ce/Al2O3 Particles

Heterogeneous Photocatalysis for Indoor Air Purification: Recent Advances in Technology from Material to Reactor Modeling

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