Wide‐bandgap HfO2‐V2O5 nanowires heterostructure for visible light‐driven photocatalytic degradation. Issue 3 (23rd November 2019)

• Record Type: Journal Article
• Authors: Sari, Fitri Nur Indah; Lu, Sang‐Hsuan; Ting, Jyh‐Ming
• Is Part Of: Journal of the American Ceramic Society. Volume 103:Issue 3(2020)
• Page Start: 2252
• Page End: 2261
• Publication Date: 2019-11-23
• Subjects: hafnium oxide -- nanowires -- photocatalyst -- photodegradation -- vanadium oxide; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.16870
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: A novel HfO2 /V2 O5 nanocomposite has been fabricated for use as photocatalyst. HfO2 nanoparticles (NPs) were deposited on V2 O5 using a precipitation method. Both commercial V2 O5 particles and microwave‐assisted hydrothermal (MAH)‐synthesized V2 O5 nanowires (NWs) were used. We demonstrate that the HfO2 /V2 O5 nanocomposite exhibits better photodegradation efficiency than the V2 O5 . The photodegradation reaction constant of the HfO2 /V2 O5 nanocomposite is more than 66% higher than that of the V2 O5 . The wide‐bandgap, transparent HfO2 effectively reduces the electron‐hole recombination by proving defect levels to quench the recombination. A plausible band structure is proposed to support the existence of these defect levels. Abstract : The addition of wide‐bandgap HfO2 onto V2 O5 reduces the electron‐hole recombination. As a result, enhanced photodegradation of methylene blue was observed in the HfO2 /V2 O5 composites.