Synthesis of crystal-phase and color tunable mixed anion co-doped titanium oxides and their controllable photocatalytic activity

B and N mixed anions co-doped titania with various crystal phases such as anatase, brookite, and rutile were successfully synthesized by a hydrothermal synthesis followed by heat treatment in an ammonia gas atmosphere at 550–650°C (denoted as BN-Ana_ x , BN-Bro_ x , and BN-Rut_ x, x is the treatment...

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Bibliographic Details
Published in:International journal of minerals, metallurgy and materials metallurgy and materials, 2023-10, Vol.30 (10), p.2036-2043
Main Authors: Cao, Jingdi, Hhasegawa, Takuya, Asakura, Yusuke, Yamakata, Akira, Sun, Peng, Cao, Wenbin, Yin, Shu
Format: Article
Language:English
Subjects:
Ammonia
Anatase
Anions
Brookite
Catalytic activity
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Color
Composites
Controllability
Corrosion and Coatings
Glass
Heat treatment
Heavy metals
Hydrothermal crystal growth
Materials Science
Metallic Materials
Mixed anions
Natural Materials
Photocatalysis
Raw materials
Surfaces and Interfaces
Synthesis
Thin Films
Titanium dioxide
Titanium oxides
Tribology
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Summary:B and N mixed anions co-doped titania with various crystal phases such as anatase, brookite, and rutile were successfully synthesized by a hydrothermal synthesis followed by heat treatment in an ammonia gas atmosphere at 550–650°C (denoted as BN-Ana_ x , BN-Bro_ x , and BN-Rut_ x, x is the treatment temperature). The colors of as-prepared BN-Ana, BN-Bro, and BN-Rut are red, yellow-green, and cyan-green, respectively. The color changing mechanism of titania was related to their various band gap structure and the existence of B-N bonding. The nitridation temperature exhibits effective color changing compared to that of nitridation time. The different phases of the mixed anion co-doped titania possess different photocatalytic deNO x activity. The BN-Ana and BN-Rut show poor photocatalytic deNO x activity, while the BN-Bro shows excellent photocatalytic deNO x activity, better than that of standard titania photocatalyst Degussa P25. The colorful titania with low-photocatalytic activity is heavy metal elements free, indicating their possible applications as nontoxic color pigments or novel cosmetic raw materials.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-022-2573-6