Fourier Transform Infrared Spectroscopy and Atomic Force Microscopy Studies of a SiO2-TiO2-Zeolite Matrix for a CuO-CoO Catalyst Prepared by a Sol–Gel Method

Dı́az, Rafael; Macías, Samuel; Cázares, Ernesto

doi:10.1007/s10971-005-3210-3

Cited by 5 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Only for the STH-750 composite, the bands at 791 and 723 cm À1 disappeared and new bands appeared at 784 and 671 cm À1 , which can be attributed to TiO 2 anatase phase [47] and TiÀ ÀO [17], respectively. On the other hand, the band that appears at 2924 cm À1 confirms the existence of À ÀOH terminal [36], indicating the formation of acid groups during the gel formation, which eventually can be de-protonate [48] favouring the adsorption of RhB molecules or forming free radicals.…”

Section: Photocatalytic Activity and Analytical Proceduresmentioning

confidence: 95%

“…The sol-gel method was used to prepare silica-titanium sols, which were mixed with powder of ammonium Y zeolite ((NH 4 )Y, Aldrich), according the procedure reported by Díaz et al [36]. Tetraethyl orthosilicate (TEOS, Aldrich) and titanium tetraisopropoxide (TTIP, SAFC) were employed as precursors for SiO 2 and TiO 2 , respectively.…”

Section: Composites Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Photocatalytic degradation of Rhodamine B dye by cotton textile coated with SiO2-TiO2 and SiO2-TiO2-HY composites

Landi

Carneiro

Ferdov

et al. 2017

Journal of Photochemistry and Photobiology A: Chemistry

View full text Add to dashboard Cite

This work is devoted to study the photocatalytic ability of cotton textiles functionalized with SiO 2-TiO 2 and SiO 2-TiO 2-HY composites to degrade a dye molecule. Coatings were prepared by sol-gel method and calcined at different temperatures in a range of 400-750 C. FTIR confirmed the existence of SiÀ ÀOÀ ÀTi bounds and the band located in the region between 570 and 600 cm À1 was used to calculate the framework Si/Al ratio of HY in the SiO 2-TiO 2-HY composites. XRD confirmed the presence of nanosized TiO 2 (anatase phase) in all calcined composites. Nitrogen adsorption isotherms showed a decrease in surface area and pore volume for higher calcination temperature. A simple mechanical process was used to impregnate the different composites on the cotton substrates. The photocatalytic activity of cotton textiles functionalized with SiO 2-TiO 2 and SiO 2-TiO 2-HY composites was tested via the degradation of Rhodamine B (RhB) dye under similar solar irradiation. The best catalytic performance was achieved with the SiO 2-TiO 2 and SiO 2-TiO 2-HY composites subjected to a calcination treatment at 400 C, whereas SiO 2-TiO 2 presented a decolourization and mineralization around 94% and 89%, respectively, after 2 h of irradiation. Furthermore, the products of RhB degradation were analysed and identified by using HPLC-ESI-MS and ion chromatography techniques and a photocatalytic mechanism was proposed.

show abstract

Section: Photocatalytic Activity and Analytical Proceduresmentioning

confidence: 95%

Section: Composites Preparationmentioning

confidence: 99%

Photocatalytic degradation of Rhodamine B dye by cotton textile coated with SiO2-TiO2 and SiO2-TiO2-HY composites

Landi

Carneiro

Ferdov

et al. 2017

Journal of Photochemistry and Photobiology A: Chemistry

View full text Add to dashboard Cite

show abstract

“…Metal oxide is an inorganic material having a unique structure which when dispersed on zeolite surfaces exhibits physicochemical properties that differ significantly from their bulk counterpart (Abdel-Fattah et al 1997;Thoret et al 1997;El-Shobaky et al 1999;Ramirez-Cuesta & Mitchell 2007). In recent years, many applications for copper oxide in the field catalysis have been identified (Delahay et al 1998;Díaz & Lazo 2000;Turky et al 2001;Liu et al 2004;Mediavilla et al 2008). The bulk copper oxide also revealed attractive magnetic properties in nanoparticle technology as semiconductor, fuel cell, high temperature superconductor and sensor material (Ito et al 1998;Chang et al 2003;Cruccolini et al 2004).…”

Section: Date Of Submission: February 2009 Date Of Acceptance: Decemb...mentioning

confidence: 99%

ASM Sci. J., Vol. 4, No. 1, 2010

Liki

2010

ASMScJ

View full text Add to dashboard Cite

Figure on the right is the High Voltage Engineering Europe 2.0 MV Medium CurrentPlus TandetronTM accelerator providing 2.5 MeV protons which is situated in SurreyIon Beam Centre. It is taken from Figure 1(a) of the article Ion Beam ElementalAnalysis of Doped SiO2 Optical Fibre and Its Thermoluminescence Response WhenIrradiated with Proton—research work undertaken by scientists from the Universityof Technology Malaysia and the University of Surrey, Guildford, U.K. (pp. 15–21).Figure on the top left of the cover shows skeletons of simulated flood from anarticle which describes characterization of skeletons of simulated droughts and floodof water bodies (Figure 5, pp. 68). Subsequent designs shown below are from Figures6 and 4 of the first research article of this issue—Ex-vivo Differentiation of Stem Cellsfrom Human Extracted Deciduous Teeth into Bone Forming Cells which describesthe isolation of mesenchymal stem cells derived from extracted deciduous teeth anddifferentiate them into osteoblast and identifies the molecular characterization of thedifferentiated cells by using reverse transcriptase PCR (RT-PCR) analysis.

show abstract