Hydrothermal synthesis of mesoporous WO3–TiO2 powders with enhanced photocatalytic activity

Shi, Fei; Liu, Jingxiao; Huang, Xia; Yu, Ling; Su-hua, Liu; Feng, Xiang; Wang, Xiao-Ka; Shao, Guolin; Hu, Shicheng; Yang, Bin; Fan, Chuanyan

doi:10.1016/j.apt.2015.07.019

Cited by 37 publications

(15 citation statements)

References 42 publications

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“…They decrease along with the ratio of tungsten/titanium at first, and they are smaller than 2·9 eV as the ratio increased from 3 to 10%. These values are smaller than the values reported by Shi et al 30 (3·03 and 3·14 eV). These result in the change of light absorption of the samples during photocatalysis, and that is the reason why the optical properties of the samples are connected to their tungsten/titanium ratios.…”

Section: Discussioncontrasting

confidence: 73%

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The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property

LiGuohua

ChenJiajia

WuShizhao

et al. 2017

Surface Innovations

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In order to improve the photocatalytic property of a tungsten trioxide (WO 3 )/titanium dioxide (TiO 2 ) composite, a novel structure -that is, a hollow microsphere with a mesoporous wall -was fabricated. The relations between the interior characteristics and the optical, photoelectric and photocatalytic properties of the samples were investigated. The results show that the tungsten (W)/titanium (Ti) ratio and the crystallinity and diameter of the crystallite of the sample determine its optical property. The photoelectric conversion property of the sample is related to its electron ability transfer and optical property. The photocatalytic property of the sample is relevant to its optical property and interior structures, in particular the particle microstructure of the sample, the dispersion of titanium dioxide and tungsten trioxide crystallites and their contact relationship at the mesoscale. In terms of application, it is the hollow microsphere with a mesoporous wall that takes a key role. These set a connection between the property and mesostructure of the sample, which facilitates the adjustment of the property of tungsten trioxide/titanium dioxide composite. Notation

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Section: Discussioncontrasting

confidence: 73%

“…Correspondingly, the bandgaps of the samples increase from 2·28 to 2·77 eV as the temperature increased from 450 to 700°C. These values are smaller than that reported by Shi et al 30 (3·03 and 3·14 eV).…”

Section: Discussioncontrasting

confidence: 55%

The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property

LiGuohua

ChenJiajia

WuShizhao

et al. 2017

Surface Innovations

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“…20 Furthermore, ZnO NPs and synthesized Ag-ZnO hybrid materials (1 and 3 wt%) showed absorption edges (l) at 389, 396 and 402 nm, and the corresponding observed E g values were 3.19, 3.13 and 3.08 eV, respectively, which were calculated using an equation reported elsewhere. 21 Bare ZnO NPs and 1 and 3 wt% Ag-ZnO composite materials were further characterized using the X-ray diffraction technique, and their corresponding XRD patterns are presented in Fig. 2.…”

Section: Biogenic Preparation and Characterization Of Ag-zno Heterojumentioning

confidence: 99%

Green biomimetic preparation of efficient Ag–ZnO heterojunctions with excellent photocatalytic performance under solar light irradiation: a novel biogenic-deposition-precipitation approach

et al. 2019

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“…New generation photocatalysts have been developed by doping TiO 2 with tungsten oxide (WO 3 ), an n‐type semi‐conductor metal oxide with a narrow band gap of 2.4–2.8 eV and efficient electron transport property [12–15] . In addition to being non‐toxic and having lower band gap than TiO 2 , the valence and conduction bands of WO 3 are also lower which helps in faster transfer of electrons from WO 3 to TiO 2 [16–18] . The transfer of electrons and improved visible light response of WO 3 ‐TiO 2 nanocomposite is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Treatment on the Phase Composition and Surface Properties of WO₃‐TiO₂ Nanocomposites Synthesized via Hydro‐Thermal Method

Shah

Rather

2021

ChemistrySelect

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There is a huge interest in the synthesis of nanocomposites with specific physicochemical properties. Calcination temperature affects the size, morphology and other surface characteristics. WO3‐TiO2 nanocomposites were synthesized by hydrothermal method using titanium (IV) butoxide and tungsten (VI) oxide (WO3). The effects of drying time and calcination temperature on the hydrodynamic particle diameter, crystallite size, shape and zeta potential of the nanocomposites was investigated. The samples were dried in oven at 80 °C for 18 hours, calcinated at 300 to 1000 °C and analyzed by X‐ray diffraction (XRD), field emission scanning electron microscope (FE‐SEM) and fourier‐transform infrared spectroscopy (FTIR). Hydrodynamic diameter and zeta potential were measured by particle analyzer (DLS). The mean crystallite size increased from 25.2 nm to 54.9 nm when calcination temperature increased from 300 to 1000 °C. Hydrodynamic size of the nanocomposite decreased with increasing drying time, became constant after 12 hours of drying and did not change significantly after that. Moreover, the hydrodynamic size increased with increase in the calcination temperature due to growth of the crystals and formation of inter particle necks. The large zeta values (−35.8 to −41.2 mV) suggest that the nanocomposites show large electrostatic repulsive interaction and enhanced stability in aqueous solutions.

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Hydrothermal synthesis of mesoporous WO3–TiO2 powders with enhanced photocatalytic activity

Cited by 37 publications

References 42 publications

The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property

The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property

Green biomimetic preparation of efficient Ag–ZnO heterojunctions with excellent photocatalytic performance under solar light irradiation: a novel biogenic-deposition-precipitation approach

Effect of Thermal Treatment on the Phase Composition and Surface Properties of WO₃‐TiO₂ Nanocomposites Synthesized via Hydro‐Thermal Method

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Hydrothermal synthesis of mesoporous WO3–TiO2 powders with enhanced photocatalytic activity

Cited by 37 publications

References 42 publications

The Relationship between the Mesostructure of WO3/TiO2 Hollow Microsphere and its Property

The Relationship between the Mesostructure of WO3/TiO2 Hollow Microsphere and its Property

Green biomimetic preparation of efficient Ag–ZnO heterojunctions with excellent photocatalytic performance under solar light irradiation: a novel biogenic-deposition-precipitation approach

Effect of Thermal Treatment on the Phase Composition and Surface Properties of WO3‐TiO2 Nanocomposites Synthesized via Hydro‐Thermal Method

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Product

Resources

About

The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property

The Relationship between the Mesostructure of WO₃/TiO₂ Hollow Microsphere and its Property

Effect of Thermal Treatment on the Phase Composition and Surface Properties of WO₃‐TiO₂ Nanocomposites Synthesized via Hydro‐Thermal Method