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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Hierarchical growth of ZnO nanorods over SnO2 seed layer: insights into electronic properties from photocatalytic activity

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Author(s):
Da Silva, Luis F. [1] ; Lopes, Osmando F. [2] ; Catto, Ariadne C. [3] ; Avansi, Jr., Waldir [4] ; Bernardi, Maria I. B. [3] ; Li, Maximo Siu [3] ; Ribeiro, Caue [2] ; Longo, Elson [1]
Total Authors: 8
Affiliation:
[1] Univ Estadual Paulista, Inst Quim, LIEC, BR-14800900 Araraquara, SP - Brazil
[2] Embrapa Instrumentacao, BR-13560970 Sao Carlos, SP - Brazil
[3] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
[4] Univ Fed Sao Carlos, Inst Fis, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: RSC ADVANCES; v. 6, n. 3, p. 2112-2118, 2016.
Web of Science Citations: 14
Abstract

The use of nanostructured heterojunctions has been a promising option for hindering the charge recombination and thus enhancing the photocatalytic performance of catalysts. Here we present a simple strategy to hierarchically grow heterostructures using a hydrothermal treatment route. A buffer SnO2 film was produced by a sol-gel derived method, resulting in a film of approximately 100 nm composed of 5-10 nm nanoparticles. X-ray diffraction and scanning electron microscopy revealed preferential growth of the nanorod-like structures along the c-axis perpendicular to the SnO2 film, with an average nanorod diameter and length of approximately 160 nm and 1.5 mu m, respectively. The photoluminescence spectra of ZnO-SnO2 revealed a reduction in UV emission compared to individual ZnO nanorods, indicating that the recombination of the photogenerated carriers was inhibited in the heterojunction. This behavior was confirmed by evaluating the photocatalytic performance of such films against methylene blue degradation, showing that the as-prepared ZnO-SnO2 heterojunction was superior to the individual semiconductors, ZnO and SnO2. (AU)

FAPESP's process: 12/15170-6 - Synthesis and characterization of ZnO thin and thick films : application as gas sensors
Grantee:Ariadne Cristina Catto
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 13/13888-0 - Synthesis of BiVO4/bismuth oxides nano-heterostructures and evaluation of photocatalytic properties
Grantee:Osmando Ferreira Lopes
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 13/09573-3 - Synthesis and Characterization of the ZnO/SnO2 Heterostructures obtained by Hydrothermal Method: Gas Sensor Applications
Grantee:Luís Fernando da Silva
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC