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

Autor(es)

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

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY; v. 353, p. 358-367, FEB 15 2018.
• Citações Web of Science: 7

Resumo

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)

• Processo FAPESP: 15/04511-5 - Avaliação da atividade fotocatalítica e mecanismos de degradação de heteroestruturas de semicondutores dopados e grafeno
• Beneficiário: Gabriela Byzynski Soares
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/01267-1 - Compósitos de ácido grafênico-óxidos metálicos ocos para sensor de gás
• Beneficiário: Diogo Paschoalini Volanti
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/17343-0 - Efeito de metais catalisadores ou óxido de grafeno reduzido em óxidos metálicos semicondutores para detecção de compostos orgânicos voláteis
• Beneficiário: Diogo Paschoalini Volanti
• Linha de fomento: Auxílio à Pesquisa - Regular