Journal ArticleDOI
Synthesis of Hydroxide–TiO2 Compounds with Photocatalytic Activity for Degradation of Phenol
J. C. Contreras-Ruiz,S. Martínez-Gallegos,E. Ordoñez,J. C. González-Juárez,José Luis García-Rivas +4 more
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TLDR
In this article, the photocatalytic degradation of phenol using titanium dioxide (TiO2), either alone or in combination with other materials, has been tested and the results indicate that the activity of HCC-TiO 2 can be attributed to increased phenol adsorption by hydrotalcite for transfer to the active photocatalysis phase of the impregnated TiO2 particles.Abstract:
Photocatalytic degradation of phenol using titanium dioxide (TiO2), either alone or in combination with other materials, has been tested. Mg/Al hydrotalcites prepared by two methods using inorganic (HC) or organic (HS) chemical reagents, along with mixed oxides produced by calcination of these products (HCC and HSC), were mixed with titanium isopropoxide to obtain hydroxide–TiO2 compounds (HCC–TiO2 and HSC–TiO2) and their photocatalytic activity tested in solutions of 10 mg/L phenol at 120 min under illumination at λ
UV = 254 nm with power of 4 W or 8 W. The obtained materials were characterized by various techniques, revealing that TiO2 was incorporated into the mixed oxides of the calcined hydrotalcite to form the above-mentioned compounds. The photocatalytic test results indicate that the activity of HCC–TiO2 can be attributed to increased phenol adsorption by hydrotalcite for transfer to the active photocatalytic phase of the impregnated TiO2 particles, while the better results obtained for HSC–TiO2 are due to greater catalyst impregnation on the surface of the calcined hydrotalcite, reducing the screening phenomenon and achieving HSC–TiO2 degradation of up to 21.0% at 8 W. Reuse of both compounds indicated tight combination of HCC or HSC with TiO2, since in four successive separation cycles there was little reduction of activity, being associated primarily with material loss during recovery.read more
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Journal ArticleDOI
Photodegradation of phenol using composite nanofibers under visible light irradiation
TL;DR: In this article, a photocatalyst PAN-CNT/TiO2-NH2 and PAN/NiO2NH2 nanofibers have been prepared via an electrospinning technique.
Journal ArticleDOI
Semiconductor supported by palygorskite and layered double hydroxides clays to dye discoloration in solution by a photocatalytic process
Alan Ícaro Sousa Morais,Wemerson Vieira de Oliveira,Vaeudo Valdimiro De Oliveira,Luzia M. C. Honorio,Francisca Pereira de Araújo,Roosevelt D.S. Bezerra,Pierre Basílio Almeida Fechine,Bartolomeu C. Viana,Marcelo Barbosa Furtini,Edson C. Silva-Filho,Josy Anteveli Osajima +10 more
TL;DR: In this paper, a photocatalytic material using palygorskite (PAL) clays and a layered double hydroxide (LDH) calcined as support for titanium dioxide (TiO2) as an alternative for dye decontamination in aqueous media.
Journal ArticleDOI
Hydrothermal-Assisted Synthesis of TiO 2 @NiMoO 4 Nanocomposites and Evaluation of Their Photocatalysis Properties
TL;DR: In this article, the possibility of adding NiMoO4 to TiO2 nanoparticles was explored in order to enhance photocatalytic and optical properties, which can be described as the result of electron and hole transformation between the two components.
Journal ArticleDOI
Influence of the Textural Parameters of LDH-TiO2 Composites on Phenol Adsorption and Photodegradation Capacities
J. C. Contreras-Ruiz,Sonia Martínez-Gallegos,José Luis García-Rivas,Javier Illescas,J. C. González-Juárez,Guadalupe Macedo Miranda,Eduardo Ordoñez Regil +6 more
TL;DR: In this article, the relationship between the textural parameters of the materials obtained in relation to their photocatalytic efficiency and adsorption capacity was studied, finding that the surface of the solids, their structural heterogeneity, and roughness condition the photodegradation and adaption processes, using phenol as reference organic pollutant.
Journal ArticleDOI
Facile Synthesis of rGO/Mn3O4 Composite for Efficient Photodegradation of Phenol under Visible Light
P. Shobha,Albin John P. Paul Winston,S. Sunil,T. Manovah David,S. Mary Margaret,S. Muthupandi,P. Sagayaraj +6 more
TL;DR: In this article, a facile thermal treatment was applied to the Mn3O4/rGO nanocomposites to enhance reusability and to maintain higher efficiency in degradation.
References
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