Characterization and photocatalytic activity of K+-doped TiO2 photocatalysts

Chen, Lung-Chuan; Huang, Chao-Ming; Tsai, Fu-Ren

doi:10.1016/j.molcata.2006.10.011

Cited by 71 publications

(36 citation statements)

References 35 publications

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“…The Degussa P25 loading and its rutile ratio in the Degussa P25 composition are too small to be detected in the XRD pattern. Similar result was obtained by Chen et al, 2007. In the case of calcined SNTZS, they had broader peak compared to calcined pure nano-TiO 2 . This indicated the formation of smaller crystallite sized calcined SNTZS catalyst.…”

Section: Characterization Of the Catalystssupporting

confidence: 85%

Characteristics of supported nano-TiO2/ZSM-5/silica gel (SNTZS): Photocatalytic degradation of phenol

Zainudin

Abdullah

Mohamed

2010

Journal of Hazardous Materials

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Section: Characterization Of the Catalystssupporting

confidence: 85%

Characteristics of supported nano-TiO2/ZSM-5/silica gel (SNTZS): Photocatalytic degradation of phenol

Zainudin

Abdullah

Mohamed

2010

Journal of Hazardous Materials

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“…The degradation rate of RB by La-doped-TiO 2 was higher compared with undoped TiO 2 for all the calcination temperature investigated (Peng et al 2005). TiO 2 doped with 4.6% K + and calcined at 700°C was demonstrated to exhibit higher activity compared with other samples when the doping level of K + and calcinations temperature are 0-143.% and 400-1,000°C, respectively (Chen et al 2007). Wong et al (2008) studied the influence of crystallinity and carbon content on the photocatalytic degradation of MB under visible light by varying the carbon content from 0-3.2%.…”

Section: Doping and Mixed Semiconductormentioning

confidence: 91%

“…After calcinations at 900°C, it was also indicated that the anatase crystallites begin to grow extensively and transform to rutile phase and then segregate from mesostructures. Subsequently, the whole mesostructure is completely destroyed (Chen et al 2007). The surface areas are in the decreasing order of TiO 2 >4.6% K + doped>14.3% K + doped, 4.6% K + doped>TiO 2 >14.3% K + doped, 4.6% K + doped>14.3% K + doped>TiO 2 , and 14.3%K + >4.6%K + >TiO 2 when the samples were calcined at 400°C, 600°C,700°C, and 850°C, respectively.…”

Section: Film Fabrication Technique and Calcination Temperaturementioning

confidence: 99%

Advances in Heterogeneous Photocatalytic Degradation of Phenols and Dyes in Wastewater: A Review

Ahmed

Rasul

Martens

et al. 2010

Water Air Soil Pollut

368

138

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The heterogeneous photocatalytic water purification process has gained wide attention due to its effectiveness in degrading and mineralizing the recalcitrant organic compounds as well as the possibility of utilizing the solar UV and visible light spectrum. This paper aims to review and summarize the recently published works in the field of photocatalytic oxidation of toxic organic compounds such as phenols and dyes, predominant in wastewater effluent. In this review, the effects of various operating parameters on the photocatalytic degradation of phenols and dyes are presented. Recent findings suggested that different parameters, such as type of photocatalyst and composition, light intensity, initial substrate concentration, amount of catalyst, pH of the reaction medium, ionic components in water, solvent types, oxidizing agents/ electron acceptors, mode of catalyst application, and calcinations temperature can play an important role on the photocatalytic degradation of organic compounds in water environment. Extensive research has focused on the enhancement of photocatalysis by modification of TiO 2 employing metal, non-metal, and ion doping. Recent advances in TiO 2 photocatalysis for the degradation of various phenols and dyes are also highlighted in this review.

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“…Therefore, doped titanium dioxide nanotubes photocatalyst have been extensively investigated due to their capability to extend the wavelength response of TiO 2 nanotubes into the visible region and inhibits phase transformation. Moreover, doping could enhance its photoactivity by reducing the recombination of e -and h + pair and enhancing the interfacial [6], [7]. So far, various transition metal ions [8], [9], noble metal [10], and non-metals [11]- [13] [16].…”

Section: Introductionmentioning

confidence: 99%

Morphological, Structural and Optical Properties Study of Transition Metal Ions Doped TiO2 Nanotubes Prepared by Hydrothermal Method

Razali¹,

Ahmad-Fauzi²,

Mohamed³

et al. 2013

IJMMM

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Abstract-Undoped TiO 2 nanotubes and doped titanium dioxide nanotubes with various transition metal ions (Co 2+ , Ni 2+ , Cu 2+ ) were prepared by hydrothermal method. The samples were characterized using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), nitrogen gas adsorption and UV-Vis diffuse reflectance spectroscopy. The structural and morphological studies showed that the transition metal ion dopant was incorporated into interstitial positions of the TiO 2 lattice to form a new phase of TiO 2 (hexagonal) instead of anatase TiO 2 (tetragonal) for undoped TiO 2 nanotubes. It could be expected that doped TiO 2 nanotubes active under visible light due to their small band gap.Index Terms-Doped, photocatalyst, TiO 2 nanotubes, transition metal ion.

show abstract

Characterization and photocatalytic activity of K+-doped TiO2 photocatalysts

Cited by 71 publications

References 35 publications

Characteristics of supported nano-TiO2/ZSM-5/silica gel (SNTZS): Photocatalytic degradation of phenol

Characteristics of supported nano-TiO2/ZSM-5/silica gel (SNTZS): Photocatalytic degradation of phenol

Advances in Heterogeneous Photocatalytic Degradation of Phenols and Dyes in Wastewater: A Review

Morphological, Structural and Optical Properties Study of Transition Metal Ions Doped TiO2 Nanotubes Prepared by Hydrothermal Method

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