Shape-controlled synthesis of golf-like, star-like, urchin-like and flower-like SrTiO3 for highly efficient photocatalytic degradation and H2 production

Zhou, Man; Chen, Jingwen; Zhang, Yakang; Jiang, Mengting; Xu, Song; Liang, Qian; Li, Zhongyu

doi:10.1016/j.jallcom.2019.152796

Cited by 56 publications

(28 citation statements)

References 64 publications

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“…4a, which indicates that the content of defects is reduced for Bi concentrations above 1 mol%. The diminution of the optical band gap for SrTiO 3 has been also observed after doping with La and Cr [24]. This was useful to enhance the degradation of contaminant molecules such as tetracycline [24].…”

Section: Optical Properties Of the Sto And Sto:bi Powdersmentioning

confidence: 86%

“…Due to these disadvantages for TiO 2 , others photocatalysts materials such as titanates: BaTiO 3 , CaTiO 3 , PbTiO 3 , and SrTiO 3 [18][19][20][21][22] have gained the interest of researchers due to their high thermal and chemical stability [19]. Particularly, SrTiO 3 (STO) is attractive because it can be easily synthesized at low cost using hydrothermal, sol-gel, solvothermal and combustion methods [7,8,20,22,23,24]. Furthermore, its morphology (star-like, urchin-like, flower-like etc) and porosity can be controlled using the synthesis methods above.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Bismuth Dopant on the Photocatalytic Properties of SrTiO3 Under Solar Irradiation

et al. 2020

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This work presents the structural, morphological and photocatalytic properties of pure SrTiO 3 (STO) and Bismuth doped STO. Several Bi doped samples were synthesized using Bi concentrations from 0.5 to 5 mol% and the sol-gel method. According to the X-ray diffraction analysis, all the samples presented cubic phase. The Scanning electron microscopy (SEM) showed that the samples without dopant or with low Bi concentration (0 and 0.5 mol%) presented a quasi-spherical morphology. The sample doped with 1 mol% of Bi presented mainly a rod-like morphology, while the samples doped with 2 and 5 mol% showed a mixture of quasi-cubic particles and rod-like particles. The absorbance experiments demonstrated that the introduction of Bi in the STO host extended the light absorption in the visible region and decreased the band gap of STO. Both effects benefited the photocatalytic properties of STO:Bi powders. In fact, the photocatalytic evaluation of the STO and STO:Bi powders under natural solar light revealed that total degradation of methylene blue (MB) can be produced only by the sample doped with 1 mol%. Scavenger experiments were also carried out using teraphtalic acid and benzoquinone in order to figure out which oxidizing agent (OH• radicals or O 2 − ) is producing the degradation of MB dye and found that the OH• radicals are the dominant agent. Since the STO:Bi powders can be activated by solar light for the photocatalytic degradation of MB, these powders could be a low cost option for the degradation of dyes in water treatment plants.

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Section: Optical Properties Of the Sto And Sto:bi Powdersmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Effect of Bismuth Dopant on the Photocatalytic Properties of SrTiO3 Under Solar Irradiation

et al. 2020

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“…[14][15][16][17][18][19][20] Over the past twothree decades, the use of nanostructured semiconductor materials, especially TiO 2 , ZnO, SnO 2 , ZnS, SnS 2 , MoS 2 , CdS, CeO 2 , Fe 2 O 3 , Ta 2 O 5 , WO 3 , Nb 2 O 5 , SrTiO 3 and many more, has been utilized as potential photocatalysts. [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] Amongst the reported semiconductor oxides and sulfides, TiO 2 is the most studied photocatalyst due to its chemical and biologically stable nature, cost effective, having optimum band gap and band positions with stronger reducing and oxidizing electronsholes respectively. Additionally, titanium dioxide (TiO 2 ) is a semiconductor oxide exists in three crystalline phases i. e. anatase, rutile, and brookite with an excellent photocatalytic property having direct band gap of 3.2, 3.0 and 3.4 eV respectively.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Anatase/Brookite Mixed Phase TiO₂ Nanostructures and its Photocatalytic Performance Study

et al. 2021

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The TiO 2 nanostructures were prepared using hydrothermal reaction technique at different reaction temperatures viz., 120°C, 160°C, and 200°C for 24 h. The synthesized TiO 2 nanostructures was characterised by various spectroscopic techniques. XRD indicate the formation of highly crystalline nano size particles of anatase phase of TiO 2 along with minor percentage of brookite phase. Diffuse reflectance UV-Visible spectroscopy depicts the band gap around 3.2 eV. The FE-SEM shows formation of spherical particles having size in the range of 5 to 10 nm, however the small particles tend to agglomerate leading to the formation of submicron size clusters. TEM analysis confirms the formation of nanostructured TiO 2 having size in the range of 5 to 10 nm with distorted spherical shaped morphology. The photocatalytic performance of the synthesized TiO 2 was investigated by observing the degradation of aqueous methylene blue (MB) dye and H 2 generation via water splitting under 400 W mercury vapour lamp respectively. Among the prepared samples, the TiO 2 prepared at 160°C, showed highest MB degradation (97 %) within 1 h of irradiation time. The photocatalytic H 2 generation via water splitting was also investigated and found to be highest for TiO 2 prepared at 160°C, the observed rate of H 2 generation was 3848 μmol/0.1 g in 4 h is almost twelve fold higher than the pure anatase phase.

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“…An intensively investigated method for water treatment is photocatalysis, which has been recognized as a convenient, green and inexpensive technology for the complete decomposition of organic pollutants into H 2 O and CO 2 [2][3][4]. Up to now, numerous semiconductors (TiO 2 , ZnO, CdS, ZnS, CdTe, α-Fe 2 O 3 , BiOI or SrTiO 3 ) were applied as photocatalysts [5][6][7][8][9][10]. Among them, ZnO has become known as an efficient and promising candidate in pollutants removal due to its unique characteristics, such as direct and wide band gap (3.37 eV), good photocatalytic property, large area-to-volume ratio, environmentally friendly nature and low cost [11].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the Influence of Noble Metal Nanoparticles (Ag, Au, Pd) on the Photocatalytic Activity of ZnO NPs Embedded in Renewable Castor Oil Polymer Matrices

Chibac-Scutaru¹,

Podasca²,

Ţîmpu³

et al. 2020

Materials

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Hybrid polymeric materials, due to the unique combination of properties that can be obtained by the convenient variation of organic and inorganic components, represent an attractive alternative for many applications, especially photocatalysis. Herein, we report the preparation of nanocomposite films containing functionalized ZnO nanoparticles, as well as in situ photogenerated noble metal nanoparticles (Ag, Au, Pd), for the achieving of materials with enhanced photocatalytic activity under visible light. The flexible free-standing nanocomposite films were synthesized by photopolymerization of a monomer mixture (silane castor oil urethane dimethacrylate and polypropylene oxide urethane dimethacrylate) in the presence of a Irgacure 819 photoinitiator. The efficiency of ZnO NPs functionalization was established by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis, while the polymer composites were characterized by UV-Vis spectroscopy, X-ray diffraction, transmission electron microscopy and scanning electron microscopy to evidence the formation, size and distribution of the nanoparticles inside the photocrosslinked matrix. To establish the photocatalytic capacity of nanocomposite films, the decomposition of various pollutants (methyl orange, phenol, metronidazole) was monitored under visible light irradiation, the best results being obtained for Au/ZnO film. Also, the advantage of immobilizing the catalysts in a polymeric support and its recycling ability without a significant decrease in photocatalytic efficiency was analysed.

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Shape-controlled synthesis of golf-like, star-like, urchin-like and flower-like SrTiO3 for highly efficient photocatalytic degradation and H2 production

Cited by 56 publications

References 64 publications

Effect of Bismuth Dopant on the Photocatalytic Properties of SrTiO3 Under Solar Irradiation

Effect of Bismuth Dopant on the Photocatalytic Properties of SrTiO3 Under Solar Irradiation

Synthesis of Anatase/Brookite Mixed Phase TiO₂ Nanostructures and its Photocatalytic Performance Study

Comparative Study on the Influence of Noble Metal Nanoparticles (Ag, Au, Pd) on the Photocatalytic Activity of ZnO NPs Embedded in Renewable Castor Oil Polymer Matrices

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Shape-controlled synthesis of golf-like, star-like, urchin-like and flower-like SrTiO3 for highly efficient photocatalytic degradation and H2 production

Cited by 56 publications

References 64 publications

Effect of Bismuth Dopant on the Photocatalytic Properties of SrTiO3 Under Solar Irradiation

Effect of Bismuth Dopant on the Photocatalytic Properties of SrTiO3 Under Solar Irradiation

Synthesis of Anatase/Brookite Mixed Phase TiO2 Nanostructures and its Photocatalytic Performance Study

Comparative Study on the Influence of Noble Metal Nanoparticles (Ag, Au, Pd) on the Photocatalytic Activity of ZnO NPs Embedded in Renewable Castor Oil Polymer Matrices

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Synthesis of Anatase/Brookite Mixed Phase TiO₂ Nanostructures and its Photocatalytic Performance Study