Synthesis of nanocrystalline strontium titanate by a sol–gel assisted solid phase method and its formation mechanism and photocatalytic activity

Ma, Yuan; Wu, Zhengjie; Wang, Haiwang; Wang, Guanqi; Zhang, Yukai; Hu, Pengcheng; Li, Yuanming; Gao, Dekuan; Pu, Hongqin; Wang, Bingzhu; Qi, Xiwei

doi:10.1039/c9ce00495e

Cited by 36 publications

(16 citation statements)

References 54 publications

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“…The reason for SrCO 3 phase depletion with increasing temperature is still unclear. We believe that the SrCO 3 reacts directly with the titanium species to yield the SrTiO 3 phase, as observed before . The intensity ratios of the (110) characteristic peak to the (100) peak, i.e., I (110) / I (100) , presented an exceptional temperature dependency, as indicated in Figure d.…”

Section: Results and Discussionsupporting

confidence: 65%

“…We believe that the SrCO 3 reacts directly with the titanium species to yield the SrTiO 3 phase, as observed before. 46 The intensity ratios of the (110) characteristic peak to the (100) peak, i.e., I (110) / I (100) , presented an exceptional temperature dependency, as indicated in Figure 4 d. This ratio increases up to 750 °C and becomes nearly invariant for higher temperatures, strongly suggesting a favored growth of the {110} facets ( Figure 4 d). The lattice parameter ( a 0 ) and the crystallite size ( D hkl ) were calculated using Bragg’s law and the Scherrer equation (see the Supplementary Information ) from the highest intensity peak, i.e., (110) direction and are also displayed in Figure 4 d. The lattice parameter a 0 decreased up to 750 °C, resulting in the unit cell volume contraction; hence, a crystal structure with shorter bond lengths is formed.…”

Section: Results and Discussionmentioning

confidence: 86%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Peering into the Formation of Template-Free Hierarchical Flowerlike Nanostructures of SrTiO₃

et al. 2020

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The development of efficient advanced functional materials is highly dependent on properties such as morphology, crystallinity, and surface functionality. In this work, hierarchical flowerlike nanostructures of SrTiO 3 have been synthesized by a simple template-free solvothermal method involving poly(vinylpyrrolidone) (PVP). Molecular dynamics simulations supported by structural characterization have shown that PVP preferentially adsorbs on {110} facets, thereby promoting the {100} facet growth. This interaction results in the formation of hierarchical flowerlike nanostructures with assembled nanosheets. The petal morphology is strongly dependent on the presence of PVP, and the piling up of nanosheets, leading to nanocubes, is observed when PVP is removed at high temperatures. This work contributes to a better understanding of how to control the morphological properties of SrTiO 3 , which is fundamental to the synthesis of perovskite-type materials with tailored properties.

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Section: Results and Discussionsupporting

confidence: 65%

Section: Results and Discussionmentioning

confidence: 86%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Peering into the Formation of Template-Free Hierarchical Flowerlike Nanostructures of SrTiO₃

et al. 2020

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“…Important research endeavors have recently been devoted to the preparation of materials by using various chemical approaches. [11][12][13] Vijatovic et al [14] reported that the synthesis process has a significant influence on the major properties of the ceramics. Indeed, the morphology of powders consists of particles and their shape and size, the dimensions are related to the synthesis method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ba₁₋_xSr_xTiO₃ (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Tihtih

Ibrahim

Kurovics

et al. 2021

Crystal Research and Technology

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Strontium‐modified barium titanate ceramics with the compositional formula Ba1−xSrxTiO3 (barium strontium titanate, BSrxT) with (x = 0, 0.05, 0.125, 0.15, 0.20, and 0.3) have been synthesized through sol‐gel method. X‐ray diffraction (XRD) patterns of the as‐prepared ceramics, calcined at a relatively low temperature (950 °C/3 h), reveal that BSrxT ceramics possess tetragonal structure in the range of x = 0–20% and shift into a cubic structure at high Sr composition (x = 30%). Based on XRD and Fourier‐transform infrared spectroscopy analysis, the occupation of the Ba and/or Ti sites by strontium in the BaTiO3 system and the behaviors of the crystalline parameters as functions of the Sr content have been discussed. The scanning electron microscopy shows that the grain size and densification sensitively depend on the Sr content. The study of the thermal conductivity measurements performed on the as‐prepared ceramics reveals the influence of Sr content on the thermal conductivity value. However, the microstructure of BSrxT impacts the compressive strength, therefore, the value of the latter is found to be decreased when the grain size increased.

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“…Photolysis of water for hydrogen production and photocatalytic degradation of organic pollutants by sunlight have positive effects on energy and environmental problems. [1] At present, the common semiconductor photocatalysts, such as TiO 2 , SrTiO 3 [2] and BaTiO 3 [3] , has the advantages of nontoxic, good stability, high photocatalytic activity. However, with a band gap as high as 3.1-3.3 eV, they can only absorb ultraviolet light.…”

Section: Introductionmentioning

confidence: 99%

Study on Microstructure and Photocatalytic Mechanism of g‐C₃N₄/WO₃ Heterojunctions Prepared by Ice Template

et al. 2021

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For semiconductor photocatalyst, such as g-C 3 N 4 /WO 3 , heterojunction contact area and specific surface area are the main reasons that limit their photocatalytic activity. Simultaneously, the photogenerated electron-hole transport mechanism of g-C 3 N 4 /WO 3 is still controversial. In this article, g-C 3 N 4 /WO 3 semiconductor photocatalysts were synthesized by ice template method. XRD, SEM, BET, etc. were used to characterize the microstructure and morphology of g-C 3 N 4 /WO 3 with different quality scores of WO 3 , and it was found that the specific surface area of 10 wt% g-C 3 N 4 /WO 3 reached 54.8 m 2 /g, which was 1.92 times that of g-C 3 N 4 . The photocatalytic performance of semiconductor photocatalysts was measured by photolysis of aquatic hydrogen and degradation of RhB solution. The results show that the cumulative hydrogen production of 10 wt % g-C 3 N 4 /WO 3 is 780.11 μmol/g, which is 27.5 % higher than that of g-C 3 N 4 . Simultaneously, the degradation rate of the g-C 3 N 4 /WO 3 composite material to Rhodamine B solution is 4.27 times that of g-C 3 N 4 . The mechanism of electron hole separation was obtained by EPR, and it is proved that g-C 3 N 4 / WO 3 composite material constructs Z-type heterojunction.

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Synthesis of nanocrystalline strontium titanate by a sol–gel assisted solid phase method and its formation mechanism and photocatalytic activity

Abstract: Strontium titanate (SrTiO3) with a perovskite structure is widely applied to hydrogen production by photolysis water splitting.

Cited by 36 publications

References 54 publications

Peering into the Formation of Template-Free Hierarchical Flowerlike Nanostructures of SrTiO₃

Peering into the Formation of Template-Free Hierarchical Flowerlike Nanostructures of SrTiO₃

Synthesis of Ba₁₋_xSr_xTiO₃ (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Study on Microstructure and Photocatalytic Mechanism of g‐C₃N₄/WO₃ Heterojunctions Prepared by Ice Template

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Synthesis of nanocrystalline strontium titanate by a sol–gel assisted solid phase method and its formation mechanism and photocatalytic activity

Abstract: Strontium titanate (SrTiO3) with a perovskite structure is widely applied to hydrogen production by photolysis water splitting.

Cited by 36 publications

References 54 publications

Peering into the Formation of Template-Free Hierarchical Flowerlike Nanostructures of SrTiO3

Peering into the Formation of Template-Free Hierarchical Flowerlike Nanostructures of SrTiO3

Synthesis of Ba1−xSrxTiO3 (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Study on Microstructure and Photocatalytic Mechanism of g‐C3N4/WO3 Heterojunctions Prepared by Ice Template

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Product

Resources

About

Peering into the Formation of Template-Free Hierarchical Flowerlike Nanostructures of SrTiO₃

Peering into the Formation of Template-Free Hierarchical Flowerlike Nanostructures of SrTiO₃

Synthesis of Ba₁₋_xSr_xTiO₃ (x = 0–0.3) Ceramic Powders via Sol‐Gel Method: Structural, Microstructure, Thermal Conductivity, and Compressive Strength Properties

Study on Microstructure and Photocatalytic Mechanism of g‐C₃N₄/WO₃ Heterojunctions Prepared by Ice Template