High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method

Author(s)

Byzynski, Gabriela ^[1] ; Pereira, Andreza Prado ^[2] ; Volanti, Diogo P. ^[2] ; Ribeiro, Caue ^[3] ; Longo, Elson ^[4]

Affiliation

^[1] UNESP Sao Paulo State Univ, IQ, Araraquara, SP - Brazil

^[2] UNESP Sao Paulo State Univ, IBILCE, Sao Jose Do Rio Preto, SP - Brazil

^[3] EMBRAPA Instrumentacao, Sao Carlos, SP - Brazil

^[4] UFSCar Univ Fed Sao Carlos, DQ, Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY; v. 353, p. 358-367, FEB 15 2018.
• Web of Science Citations: 7

Abstract

The use of extensive, time-consuming synthesis and the cost of an additional element in synthesis makes difficult the synthesis of photocatalyst active under a broad wavelength range. We propose a synthesis method to obtain ZnO nanoparticles in distinctive morphologies, which lie to several photocatalytic activation conditions. The Zn precursor concentration, solvent, temperature and reaction time altered the ZnO particles morphologies. Although all synthesis parameters modification interferes in ZnO particle morphology, the most pronounced was Zn salt precursor concentration. The synthesis parameter did not interfere in the crystalline wurtzite ZnO phase and the optical characterization, indicating possibilities of ionic defects formations in ZnO lattice. The ``3-D flower like{''} ZnO structure reaches 98% of discoloration under UV illumination and 42% under visible illumination of initial rhodamine-B concentration. The good UV and visible photocatalytic active confirms that with only the modification of synthesis method without any dopant element, ZnO structure is active in large wavelength range. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 17/01267-1 - Graphene acid-hollow metal oxides composites for gas sensor
• Grantee: Diogo Paschoalini Volanti
• Support Opportunities: Regular Research Grants
• FAPESP's process: 15/04511-5 - Photocatalytic activity evaluation and degradation mechanism of doped semiconductor and graphene heterostructure
• Grantee: Gabriela Byzynski Soares
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/17343-0 - Effect of metal catalysts or reduced graphene oxide on metal oxides semiconductors for detection of volatile organic compounds
• Grantee: Diogo Paschoalini Volanti
• Support Opportunities: Regular Research Grants