Glycine assisted synthesis of flower-like TiO2 hierarchical spheres and its application in photocatalysis

Tao, Yugui; Xu, Yanqiu; Pan, Jun; Qin, Changyun; Zhou, Peng

doi:10.1016/j.mseb.2012.08.010

Cited by 36 publications

(23 citation statements)

References 44 publications

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“…Recently, glycine as α-aminocarboxylicfunctional group was used for the synthesis of anatase/brookiteTiO 2 [13,14].Tao et al used tetra-n-butyl titanate (TBT), sodium hydroxide (NaOH) and glycine to prepare mainly anatasenanoflower. They used different amounts of glycine to follow up the flower morphology not the phase composition of TiO 2.…”

Section: Introductionmentioning

confidence: 99%

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Tailored synthesis of anatase–brookite heterojunction photocatalysts for degradation of cylindrospermopsin under UV–Vis light

El‐Sheikh

Khedr

Zhang

et al. 2017

Chemical Engineering Journal

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Anatase-brookiteheterojunction TiO 2 (ABH) photocatalysts were purposefully tailored by introducing different glycine concentrations through hydrothermal treatment at 200 °C for 20 h. In the absence of glycine, pure anatase and brookite phases were selectively prepared via simply adjusting the initial pH value with NH 4 OH or NaOH. The as-synthesized photocatalysts were characterized with X-ray diffraction (XRD), Raman spectroscopy, UV-Vis diffuse reflectance spectra (DRS), photoluminescence (PL), surface area measurements, Fourier transform infrared spectroscopy (FT-IR) and field emission-scanning electron microscopy (FE-SEM). The XRD revealed that brookite content decreased in ABH samples with glycine concentration increased. The prepared TiO 2 nanoparicles have mesostructure with large surface area values ranging from 27.9 to 62.3 m 2 g-1. SEM images showed spindle-like brookite structure and rod-like brookite mixed with small anataseparticle obtained in the absence and presence of glycine, respectively. The electronhole recombination efficiency in ABH photocatalysts was much lower than that in single phase

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Section: Introductionmentioning

confidence: 99%

“…They used different amounts of glycine to follow up the flower morphology not the phase composition of TiO 2. They prepared one sample of anatase/brookite TiO 2 with low crystallinity; howeverthey did not study its performance in the photocatalytic reactions [13].…”

Section: Introductionmentioning

confidence: 99%

Tailored synthesis of anatase–brookite heterojunction photocatalysts for degradation of cylindrospermopsin under UV–Vis light

El‐Sheikh

Khedr

Zhang

et al. 2017

Chemical Engineering Journal

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“…In particular, a three-dimensional (3D) photocatalyst exhibits a high surface area-to-volume proportion, accelerating the movement of charge carriers and the transport of pollutant molecules to the surface of photocatalyst, and increasing light absorbance capacity [17,21]. Some researchers have found that 3D TiO 2 -incorporated architectures had a higher photocatalytic activity relative to that of zero-dimensional (0D) TiO 2 -incorporated architectures for the treatment of aqueous-phase p-chlorophenol, methylene blue, methyl orange, and rhodamine B [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional TiO2 Structures Incorporated with Tungsten Oxide for Treatment of Toxic Aromatic Volatile Compounds

Lee¹,

Jo²

2017

Catalysts

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This study assessed 3D WO 3 -TiO 2 nanoflowers (WTNF) synthesized by a combined hydrothermal-ultrasonication-impregnation method for their applicability to the treatment of aromatic volatile compounds under visible-light illumination. The scanning electron microscopy exhibited the formation of 3D structures in the prepared WTNF samples. The X-ray diffraction patterns and energy dispersive X-ray results indicated a successful incorporation of WO 3 into TNF structures. The UV-visible spectroscopy showed that the prepared WTNF samples can be functioned under visible light irradiation. The output-to-input concentration ratios of toluene and o-xylene with WTNF samples were lower than those of TiO 2 nanoflowers. These findings were illustrated on the basis of charge separation ability, adsorption capability, and light absorption of the sample photocatalysts. The input-to-output concentration ratios of the target chemicals were lowest for 10 M NaOH and highest for 5 M NaOH. The photocatalytic degradation efficiencies of WTNF sample photocatalysts increased with increasing WO 3 content from 0.1% to 1.0%, and dropped gradually with increasing WO 3 content further to 4.0%. Light-emitting-diodes (LEDs) are a more highly energy-efficient light source compared to a conventional lamp for the photocatalytic degradation of toluene and o-xylene, although the photocatalytic activity is higher for the conventional lamp.

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“…Especially, flower-like hierarchical nanostructures organized from one-dimensional (1D) or two-dimensional (2D) nanobuilding units are found to be attractive due to the enhanced light absorption and much more exposed surface region [18]. Many inorganic photocatalytic materials with flower-like hierarchical structures have been prepared, such as TiO 2 [19,20], ZnO [21], Ag 3 PO 4 [22], and FeTiO 3 [23]. Tetrabutyl titanate has been used as precursor for the fabrication of hierarchical mesoporous three-dimensional (3D) flower-like TiP by hydrothermal reaction [15,24,25].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical flower-like titanium phosphate derived from H-titanate nanotubes for photocatalysis

et al. 2015

J Mater Sci

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Nanosheet-assembled hierarchical flower-like titanium phosphate (TiP) is synthesized via hydrothermal treatment of H-titanate nanotubes (Ti-NT) at the optimized conditions of 0.1 M of H 3 PO 4 and hydrothermal temperature of 130°C. A possible formation mechanism for the TiP flowers, involving the disintegration of Ti-NT and the growth and assembling of TiP nanosheets, is proposed. The main compositions of the uncalcined TiP flowers are titanium hydrogen phosphate hydrates (Ti(HPO 4 ) 2 ÁxH 2 O), which can be transformed to titanium phosphate (TiP 2 O 7 ) after high temperature calcination. The photocatalytic activity of the prepared TiP flowers is increased with the increased calcination temperature, which may be attributed to the better photocatalytic activity of TiP 2 O 7 than Ti(HPO 4 ) 2 ÁxH 2 O and the increased crystallization of TiP 2 O 7 .

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Glycine assisted synthesis of flower-like TiO2 hierarchical spheres and its application in photocatalysis

Cited by 36 publications

References 44 publications

Tailored synthesis of anatase–brookite heterojunction photocatalysts for degradation of cylindrospermopsin under UV–Vis light

Tailored synthesis of anatase–brookite heterojunction photocatalysts for degradation of cylindrospermopsin under UV–Vis light

Three-Dimensional TiO2 Structures Incorporated with Tungsten Oxide for Treatment of Toxic Aromatic Volatile Compounds

Hierarchical flower-like titanium phosphate derived from H-titanate nanotubes for photocatalysis

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