Hydrothermal synthesis of Cr-doped SrTiO3 nanoparticles for rhodamine-B dye degradation under visible light illumination

Rahman, Qazi Inamur; Ahmad, Musheer; Mehta, S.K.

doi:10.1007/s00396-017-4085-x

Cited by 22 publications

(11 citation statements)

References 18 publications

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“…Regarding the average crystal size obtained in Cr-doped STO powders, the measured values using the XRD results were: 57.1 ± 1.0, 41.0 ± 0.8, 41.5 ± 0.8, 37.5 ± 0.4, for x = 0, 0.02, 0.04 and 0.1, respectively. Similar results, with values close to 30 nm, were obtained for related compositions using the conventional hydrothermal method plus calcination [17] and the microwave-hydrothermal technique [22]. The TEM images of the SrTi 0.96 Cr 0.04 O 3 sample synthesised at 200 °C for 60 min can be observed in Figure 3.…”

Section: Resultssupporting

confidence: 79%

“…In addition to the doping strategy for enhancing the catalytic response, crystal size and morphology have also been modified in an attempt to improve the photocatalytic performance of STO. To achieve these modifications on the STO features, several synthesis methods have been tested, including a solidstate reaction [3,[11][12], sol-gel [13][14], Pechini [6,15], conventional hydrothermal [16][17], solvothermal [4,[18][19], electrospinning [20], microwave-hydrothermal [21][22] and flux methods [23]. Most of these techniques require high temperatures or a long heat treatment time for the powder crystallisation.…”

Section: Introductionmentioning

confidence: 99%

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MICROWAVE-HYDROTHERMAL SYNTHESIS AND PHOTOCATALYTIC PROPERTIES OF Cr-DOPED SrTiO₃ POWDERS

López-Juárez¹

2021

Ceramics - Silikaty

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The synthesis of Cr-doped SrTiO 3 (x = 0, 0.02, 0.04 and 0.1) was performed by the microwave-hydrothermal method. The fast synthesis of SrTi 0.96 Cr 0.04 O 3 pure phase powders was achieved at 200 °C for 30 min. It was observed that chromium entered into the solid solution within the SrTiO 3 lattice as was demonstrated from the XRD and Raman analyses. The mean crystal size of the synthesised powders was close to 60 nm as determined by XRD analysis and confirmed by the TEM images. The specific surface was measured and the values range from 27 ± 2.8 to 37 ± 3.7 m 2 •g -1 . The photocatalytic properties were evaluated for the hydrogen evolution from the methanol solution. The best performance was observed for x = 0.04, for which one of the highest surface areas was obtained (34 m 2 •g -1 ) among the investigated compositions.

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Section: Resultssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

MICROWAVE-HYDROTHERMAL SYNTHESIS AND PHOTOCATALYTIC PROPERTIES OF Cr-DOPED SrTiO₃ POWDERS

López-Juárez¹

2021

Ceramics - Silikaty

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“…A plot between ln(C 0 /C) and time offers a straight line with slope k app constant of 0.0111 min −1 and with a regression coefficient R 2 of 0.9596, and the results were inconsistent with previously reported work for other photocatalysts [26][27][28].…”

Section: Photocatalytic Activity: Experimental Approachcontrasting

confidence: 91%

Crystal Structure, Topology, DFT and Hirshfeld Surface Analysis of a Novel Charge Transfer Complex (L3) of Anthraquinone and 4-{[(anthracen-9-yl)meth-yl] amino}-benzoic Acid (L2) Exhibiting Photocatalytic Properties: An Experimental and Theoretical Approach

Ahmed

Fatima

Shakya³

et al. 2022

Molecules

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Here, we report a facile route to the synthesizing of a new donor–acceptor complex, L3, using 4-{[(anthracen-9-yl)methyl] amino}benzoic acid, L2, as donor moiety with anthraquinone as an acceptor moiety. The formation of donor–acceptor complex L3 was facilitated via H-bonding and characterized by single-crystal X-ray diffraction. The X-ray diffraction results confirmed the synthesized donor–acceptor complex L3 crystal belongs to the triclinic system possessing the P-1 space group. The complex L3 was also characterized by other spectral techniques, viz., FTIR and UV absorption spectroscopy, which confirmed the formation of new bonds between donor L2 moiety and acceptor anthraquinone molecule. The crystallinity and thermal stability of the newly synthesized complex L3 was confirmed by powdered XRD and TGA analysis and theoretical studies; Hirshfeld surface analysis was performed to define the type of interactions occurring in the complex L3. Interestingly, theoretical results were successfully corroborated with experimental results of FTIR and UV absorption. The density functional theory (DFT) calculations were employed for HOMO to LUMO; the energy gap (∆E) was calculated to be 3.6463 eV. The complex L3 was employed as a photocatalyst for the degradation of MB dye and was found to be quite efficient. The results showed MB dye degraded about 90% in 200 min and followed the pseudo-first-order kinetic with rate constant k = 0.0111 min−1 and R2 = 0.9596. Additionally, molecular docking reveals that the lowest binding energy was −10.8 Kcal/mol which indicates that the L3 complex may be further studied for its biological applications.

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“…Figure 2(c) depicted the Ag 3d XPS spectra with two peaks centered at 367 eV and 373 eV, corresponding to the electric states of Ag 3d 3/2 and Ag 3d 5/2 , which indicated that Ag species existed in the form of Ag + and a bit of Ag 0 [16,17]. From figure 2(d), the two peaks at about 576.2 eV and 585.5 eV could be ascribed to Cr 3+ 2p 3/2 and Cr 3+ 2p 1/2 , confirming that Cr doped into the crystal of SrTiO 3 and it existed mainly as the form of trivalent oxide [14].…”

Section: Structure Characterizationmentioning

confidence: 81%

“…All the diffraction peaks could be assigned to the perovskite type of SrTiO 3 (JCPDS No.35-0734). Compared with SrTiO 3 , the major diffraction peaks of Cr-SrTiO 3 nanoparticle had a tiny displacement, and its crystal structure maintained even it was doped with Cr, indicating that Cr 3+ ions could easily incorporate into the crystal lattice without changing the position of the diffraction peak [14]. The reason may be that the ionic radius of Cr 3+ (61.5 pm) is similar to Ti 4+ (60.5 pm) and less than that of Sr 2+ (1.26 Å), it can replace some of the lattice titanium and have no influence on its structure.…”

Section: Photocatalytic Performance Testmentioning

confidence: 99%

Exceptional photocatalytic activity for Ag,Cr- SrTiO₃ activated by H₂O₂ for removal of organic pollutants

Zhang

Lei

et al. 2020

Mater. Res. Express

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Ag,Cr-SrTiO 3 nanocomposite was successfully prepared through the one-pot situ solvothermal method by using butyl titanate, CrCl 3 ·6H 2 O and Sr(NO 3 ) 2 as raw materials. The obtained nanocomposites were characterized by x-ray diffraction, scanning electron microscopy and x-ray photoelectron spectroscopy. UV-visible diffuse reflectance spectroscopy was used to investigate the optical properties and the results demonstrated the extension of spectral response from ultraviolet to visible light region. Compared with pure SrTiO 3 , Ag,Cr-SrTiO 3 exhibited remarkable enhancement in adsorption and photocatalytic ability. More importantly, samples activated by H 2 O 2 revealed extraordinary photocatalytic activity, which could remove 98.8% of MO within 60 min with 0.4 wt% Ag,Cr-SrTiO 3 . This work not only indicates that Ag,Cr-SrTiO 3 is a desired photocatalytic material to degrade of organic pollutants under enlarging response range of solar light, but also shows that the addition of H 2 O 2 can promote the photodegradation reaction.

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Hydrothermal synthesis of Cr-doped SrTiO3 nanoparticles for rhodamine-B dye degradation under visible light illumination

Cited by 22 publications

References 18 publications

MICROWAVE-HYDROTHERMAL SYNTHESIS AND PHOTOCATALYTIC PROPERTIES OF Cr-DOPED SrTiO₃ POWDERS

MICROWAVE-HYDROTHERMAL SYNTHESIS AND PHOTOCATALYTIC PROPERTIES OF Cr-DOPED SrTiO₃ POWDERS

Crystal Structure, Topology, DFT and Hirshfeld Surface Analysis of a Novel Charge Transfer Complex (L3) of Anthraquinone and 4-{[(anthracen-9-yl)meth-yl] amino}-benzoic Acid (L2) Exhibiting Photocatalytic Properties: An Experimental and Theoretical Approach

Exceptional photocatalytic activity for Ag,Cr- SrTiO₃ activated by H₂O₂ for removal of organic pollutants

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Hydrothermal synthesis of Cr-doped SrTiO3 nanoparticles for rhodamine-B dye degradation under visible light illumination

Cited by 22 publications

References 18 publications

MICROWAVE-HYDROTHERMAL SYNTHESIS AND PHOTOCATALYTIC PROPERTIES OF Cr-DOPED SrTiO₃ POWDERS

MICROWAVE-HYDROTHERMAL SYNTHESIS AND PHOTOCATALYTIC PROPERTIES OF Cr-DOPED SrTiO₃ POWDERS

Crystal Structure, Topology, DFT and Hirshfeld Surface Analysis of a Novel Charge Transfer Complex (L3) of Anthraquinone and 4-{[(anthracen-9-yl)meth-yl] amino}-benzoic Acid (L2) Exhibiting Photocatalytic Properties: An Experimental and Theoretical Approach

Exceptional photocatalytic activity for Ag,Cr- SrTiO3 activated by H2O2 for removal of organic pollutants

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Exceptional photocatalytic activity for Ag,Cr- SrTiO₃ activated by H₂O₂ for removal of organic pollutants