Anatase TiO2 mesocrystals with exposed (0 0 1) surface for enhanced photocatalytic decomposition capability toward gaseous styrene
Author(s)
Chen, Jiangyao
Li, Guiying
Zhang, Haimin
Liu, Porun
Zhao, Huijun
An, Taicheng
Year published
2014
Metadata
Show full item recordAbstract
Anatase TiO2 mesocrystals with exposed (0 0 1) surface have been successfully synthesized by a facile one-step solvothermal method using NH4F as the structure regulator in glacial acetic acid environment. The exposed (0 0 1) surface of the obtained anatase TiO2 mesocrystal was consisted of numerous nanocrystals with exposed {0 0 1} facet. The results indicated that both the added amount of NH4F and solvothermal reaction time played significant roles in the formation of anatase TiO2 mesocrystals with exposed (0 0 1) surface. A possible formation mechanism of anatase TiO2 mesocrystal with exposed (0 0 1) surface was proposed ...
View more >Anatase TiO2 mesocrystals with exposed (0 0 1) surface have been successfully synthesized by a facile one-step solvothermal method using NH4F as the structure regulator in glacial acetic acid environment. The exposed (0 0 1) surface of the obtained anatase TiO2 mesocrystal was consisted of numerous nanocrystals with exposed {0 0 1} facet. The results indicated that both the added amount of NH4F and solvothermal reaction time played significant roles in the formation of anatase TiO2 mesocrystals with exposed (0 0 1) surface. A possible formation mechanism of anatase TiO2 mesocrystal with exposed (0 0 1) surface was proposed based on the experimental data. As UV active photocatalysts, the resultant anatase TiO2 mesocrystals were evaluated in detail by photocatalytic decomposition of gaseous styrene. The results demonstrated that the anatase TiO2 mesocrystals fabricated by solvothermal treating a mixture of 0.50 g NH4F, 2.50 mL Ti(OC4H9)4 and 50 mL of glacial acetic acid at 210 àfor 24 h exhibited the highest photocatalytic activity to the decomposition of styrene. This is due to the synergistic effects of excellent crystallinity, high energy {0 0 1} crystal facets, relatively large surface area, enhanced bandgap energy and unique mesoporous structure.
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View more >Anatase TiO2 mesocrystals with exposed (0 0 1) surface have been successfully synthesized by a facile one-step solvothermal method using NH4F as the structure regulator in glacial acetic acid environment. The exposed (0 0 1) surface of the obtained anatase TiO2 mesocrystal was consisted of numerous nanocrystals with exposed {0 0 1} facet. The results indicated that both the added amount of NH4F and solvothermal reaction time played significant roles in the formation of anatase TiO2 mesocrystals with exposed (0 0 1) surface. A possible formation mechanism of anatase TiO2 mesocrystal with exposed (0 0 1) surface was proposed based on the experimental data. As UV active photocatalysts, the resultant anatase TiO2 mesocrystals were evaluated in detail by photocatalytic decomposition of gaseous styrene. The results demonstrated that the anatase TiO2 mesocrystals fabricated by solvothermal treating a mixture of 0.50 g NH4F, 2.50 mL Ti(OC4H9)4 and 50 mL of glacial acetic acid at 210 àfor 24 h exhibited the highest photocatalytic activity to the decomposition of styrene. This is due to the synergistic effects of excellent crystallinity, high energy {0 0 1} crystal facets, relatively large surface area, enhanced bandgap energy and unique mesoporous structure.
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Journal Title
Catalysis Today
Volume
224
Subject
Chemical sciences
Inorganic chemistry not elsewhere classified
Engineering
Functional materials
Nanomaterials