Effect of the sintering temperature on the photocatalytic activity of ZnO+Zn2TiO4 thin films

Mayén-Hernández, S.A.; Torres‐Delgado, G.; Castanedo‐Pérez, R.; Márquez‐Marín, J.; Gutiérrez-Villarreal, Mario H.; Zelaya-Ángel, O.

doi:10.1016/j.solmat.2007.04.021

Cited by 32 publications

(12 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar results for the optical band gaps of mixed ZnO-TiO 2 materials are reported by other authors [43], and they had estimated E g , varying from 3.84 up to 4.12 eV in proportion to the TiO 2 content. On the other hand, Zn 2 TiO 4 films are reported to have E g = 3.7 eV [44], The refractive indexes of the spin coated TiO 2 , ZnO and mixed Zn/Ti oxide films can be calculated using the equation given in ref. [45].…”

Section: Discussionmentioning

confidence: 99%

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Ivanova

Harizanova

Koutzarova

et al. 2011

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

The sol-gel route has been applied to obtain ZnO-TiO 2 thin films. For comparison, pure TiO 2 and ZnO films are also prepared from the corresponding solutions. The films are deposited by a spin-coated method on silicon and glass substrates. Their structural and vibrational properties have been studied as a function of the annealing temperatures (400-750 °C). Pure ZnO films crystallize in a wurtzite modification at a relatively low temperature of 400 °C, whereas the mixed oxide films show predominantly amorphous structure at this temperature. XRD analysis shows that by increasing the annealing temperatures, the sol-gel Zn/Ti oxide films reveal a certain degree of crystallization and their structures are found to be mixtures of wurtzite ZnO, Zn 2 TiO 4 , anatase TiO 2 and amorphous fraction. The XRD analysis presumes that Zn 2 TiO 4 becomes a favored phase at the highest annealing temperature of 750 °C. The obtained thin films are uniform with no visual defects. The optical properties of ZnO-TiO 2 films have been compared with those of single component films (ZnO and TiO 2 ). The mixed oxide films present a high transparency with a slight decrease by increasing the annealing temperature.

show abstract

Section: Discussionmentioning

confidence: 99%

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Ivanova

Harizanova

Koutzarova

et al. 2011

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

show abstract

“…Furthermore, previous studies [3,[5][6][7][8] have shown that ZnO is a promising candidate among other metal oxides such as TiO 2 , SnO 2 , ZrO 2 , ␣-Fe 2 O 3 , WO 3 , CdS and ZnS. ZnO has been used as a photocatalyst as a powder [9][10][11][12] and as supported thin films [13][14][15][16]. Most studies have focused on the characterisation of the photocatalytic nature of ZnO [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…ZnO has been used as a photocatalyst as a powder [9][10][11][12] and as supported thin films [13][14][15][16]. Most studies have focused on the characterisation of the photocatalytic nature of ZnO [9][10][11][12][13][14][15][16]. Fewer studies have focussed on reaction intermediate and product quantification and analysis [1,[17][18][19], with fewer still aiming to determine the impact and relationship of the photocatalyst surface and solution reactions to this reaction intermediate and product spectrum.…”

Section: Introductionmentioning

confidence: 99%

Conventional versus lattice photocatalysed reactions: Implications of the lattice oxygen participation in the liquid phase photocatalytic oxidation with nanostructured ZnO thin films on reaction products and mechanism at both 254nm and 340nm

Ali

Emanuelsson

Patterson

2011

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

“…O dióxido de titânio também pode ser sinterizado em laboratório. A técnica mais utilizada é sol-gel a partir de um precursor como tetraisopropóxido de titânio [17][18][19][20][21][22] ou tetracloreto de titânio [23,24]. A utilização do tetraisopropóxido de titânio (Ti-i-pr, Ti(OCH(CH 3 ) 2 ) 4 ) como precursor é mais referenciada, na qual sóis aquosos de Ti-i-pr são obtidos a partir da peptização e hidrólise de Ti-i-pr usando água destilada.…”

Section: Produção Industrial E Síntese Em Laboratóriounclassified

Superfícies fotocatalíticas de titânia em substratos cerâmicos: Parte I: Síntese, estrutura e fotoatividade

et al. 2013

View full text Add to dashboard Cite

ResumoA fotocatálise é um processo de oxidação avançada capaz de transformar uma grande variedade de poluentes orgânicos tóxicos em substâncias inofensivas em condições ambientes. Porém, a utilização do dióxido de titânio na fase anatase em produtos cerâmicos é limitada devido à transformação para fase rutilo em temperaturas superiores a 400 °C. As pesquisas apontam caminhos promissores para inibir a formação da fase rutilo através da introdução de dopantes na estrutura do semicondutor. Neste trabalho, foi realizada uma revisão dos principais aspectos encontrados na literatura especializada sobre fotocatálise com dióxido de titânio, em particular a relação entre estrutura química e atividade fotocatalítica. Palavras-chave: fotocatálise, dióxido de titânio, superfícies cerâmicas. Abstract Photocatalysis has been considered as an advanced oxidation process capable of transforming a large variety of toxic organic

show abstract

Effect of the sintering temperature on the photocatalytic activity of ZnO+Zn2TiO4 thin films

Cited by 32 publications

References 10 publications

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Conventional versus lattice photocatalysed reactions: Implications of the lattice oxygen participation in the liquid phase photocatalytic oxidation with nanostructured ZnO thin films on reaction products and mechanism at both 254nm and 340nm

Superfícies fotocatalíticas de titânia em substratos cerâmicos: Parte I: Síntese, estrutura e fotoatividade

Contact Info

Product

Resources

About