Study on the photocatalytic properties differences between the 1-D and 3-D W18O49 particles. Issue 16 (4th April 2023)

• Record Type: Journal Article
• Authors: Wang, Juan; Wang, Zhaoxiang; Gao, Jichao; Ye, Jin
• Is Part Of: RSC advances. Volume 13:Issue 16(2023)
• Page Start: 10657
• Page End: 10666
• Publication Date: 2023-04-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d3ra01031g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Comprehensive characterization and control experiments were used to deeply explore the intrinsic relationship between the morphology and photocatalytic properties of W18 O49 catalysts. Abstract : The morphology of W18 O49 catalysts has a significant effect on their photocatalytic performance. Herein, we successfully prepared two commonly used W18 O49 photocatalysts just by changing the reaction temperature in the hydrothermal system, namely 1-D W18 O49 nanowires (1-D W18 O49 ) and 3-D urchin-like W18 O49 particles (3-D W18 O49 ), and evaluated the difference of their photocatalytic performances by taking the degradation of methylene blue (MB) as an example. Remarkably, 3-D W18 O49 exhibited an impressive photocatalytic degradation performance towards MB with photocatalytic reaction rates of 0.00932 min −1, which was about 3 times higher than that of 1-D W18 O49 . The comprehensive characterization and control experiments could further reveal that the hierarchical structure of 3-D W18 O49 brought higher BET surface areas, stronger light harvesting, faster separation of photogenerated charges and so on, which was the main reason for its better photocatalytic performance. ESR results confirmed that the main active substances were superoxide radicals (˙O2 − ) and hydroxyl radicals (˙OH). This work aims to explore the intrinsic relationship between the morphology and photocatalytic properties of W18 O49 catalysts, so as to provide a theoretical basis in the morphology selection of W18 O49 or its composite materials in the field of photocatalysis.