Impacts of Annealing Temperature on Morphological, Optical and Photocatalytic Properties of Gel-Combustion-Derived LaFeO3 Nanoparticles

Yahya, Norrul Azmi; Aziz, Farhana; Jaafar, Juhana; Lau, Woei‐Jye; Salleh, Wan Norharyati Wan; Ismail, Ahmad Fauzi; Aziz, Mustafa Kamal Abdul

doi:10.1007/s13369-020-04874-z

Cited by 12 publications

(7 citation statements)

References 66 publications

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“…Interestingly, Ti2O3 and mTiO catalysts heated at 650 °C exhibited the highest N2 adsorption capacity and pore volume (Vp). In general, larger values of Vp can be beneficial for the photocatalytic reaction through providing ionic diffusion and charge transfer on the surface of the photocatalyst [54]. Some other characteristics obtained from the BET analysis are displayed in Table 1, which shows that the treatment temperature had a significant effect on the microstructure of thermally treated Ti2O3 and mTiO, particularly on the BET surface area (SBET) and pore volume (Vp).…”

Section: Characterization Of Photocatalystsmentioning

confidence: 99%

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Ti2O3/TiO2-Assisted Solar Photocatalytic Degradation of 4-tert-Butylphenol in Water

2021

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Colored Ti2O3 and Ti2O3/TiO2 (mTiO) catalysts were prepared by the thermal treatment method. The effects of treatment temperature on the structure, surface area, morphology and optical properties of the as-prepared samples were investigated by XRD, BET, SEM, TEM, Raman and UV–VIS spectroscopies. Phase transformation from Ti2O3 to TiO2 rutile and TiO2 anatase to TiO2 rutile increased with increasing treatment temperatures. The photocatalytic activities of thermally treated Ti2O3 and mTiO were evaluated in the photodegradation of 4-tert-butylphenol (4-t-BP) under solar light irradiation. mTiO heated at 650 °C exhibited the highest photocatalytic activity for the degradation and mineralization of 4-t-BP, being approximately 89.8% and 52.4%, respectively, after 150 min of irradiation. The effects of various water constituents, including anions (CO32−, NO3, Cl and HCO3−) and humic acid (HA), on the photocatalytic activity of mTiO-650 were evaluated. The results showed that the presence of carbonate and nitrate ions inhibited 4-t-BP photodegradation, while chloride and bicarbonate ions enhanced the photodegradation of 4-t-BP. As for HA, its effect on the degradation of 4-t-BP was dependent on the concentration. A low concentration of HA (1 mg/L) promoted the degradation of 4-t-BP from 89.8% to 92.4% by mTiO-650, but higher concentrations of HA (5 mg/L and 10 mg/L) had a negative effect.

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Section: Characterization Of Photocatalystsmentioning

confidence: 99%

“…Interestingly, Ti 2 O 3 and mTiO catalysts heated at 650 • C exhibited the highest N 2 adsorption capacity and pore volume (V p ). In general, larger values of V p can be beneficial for the photocatalytic reaction through providing ionic diffusion and charge transfer on the surface of the photocatalyst [54].…”

Section: Characterization Of Photocatalystsmentioning

confidence: 99%

Ti2O3/TiO2-Assisted Solar Photocatalytic Degradation of 4-tert-Butylphenol in Water

2021

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“…Some dyes are very hydrophilic, whereas others easily adsorb/sorb onto surfaces and can co-exist with other chromophores and contaminants; therefore, the identification of organic dyes on (photo)catalytic materials can be a challenging task [30][31][32][33][34][35][36]. FTIR analysis was employed to examine the changes in RB5 functional groups as well as LF throughout the duration of photocatalysis [37][38][39]. FTIR bands associated with RB5 and LF were deduced from the literature findings and are presented in Table S1 [30,34,37,40].…”

Section: Ftir Spectroscopy Analysesmentioning

confidence: 99%

“…FTIR analysis was employed to examine the changes in RB5 functional groups as well as LF throughout the duration of photocatalysis [37][38][39]. FTIR bands associated with RB5 and LF were deduced from the literature findings and are presented in Table S1 [30,34,37,40]. The FTIR spectrum of untreated RB5 is presented in Figure S6a.…”

Section: Ftir Spectroscopy Analysesmentioning

confidence: 99%

More about Persulfate-Assisted Ferrilanthanide-Mediated Photocatalysis of Textile Industry Dye Reactive Black 5: Surface Properties and Structural Assessment

Arslan-Alaton¹,

Koba-Ucun²,

Türkten

et al. 2023

Water

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Color and organic matter removal from dyehouse effluent remains a challenging issue for the environmentalist and textile dyer. Until now, various treatment processes have been proposed with limited success. In this study, the textile dye and model industrial pollutant Reactive Black 5 (RB5; 20 mg/L) could be rapidly degraded by persulfate (PS)-enhanced photocatalytic treatment using a novel, home-made lanthanum iron oxide (LF; 0.5 g/L). LF-mediated heterogeneous photocatalysis was effective when the solution pH was kept below 4. The photocatalytic degradation of RB5 solution was enhanced in the presence of 0.6 and 1.2 mM PS. The dissolved organic carbon (DOC) content of the aqueous, hydrolyzed RB5 solution (initial DOC = 5.15 mg/L) was effectively reduced by LF/UV-A (LF = 0.5 g/L; 52–54% DOC removal after 150–180 min) and LF/PS/UV-A (LF = 0.5 g/L; 60–66% DOC removal after 120 min) treatments. LF photocatalyst could be reused in four consecutive cycles for complete color and partial DOC removals without significant deterioration of the treatment performance with the LF/PS/UV-A/pH 3 process. Instrumental analyses of LF’s surface morphology/chemical composition and structural features via EDAX/SEM/Raman/FTIR/UV-vis/fluorescence spectroscopy indicated that LF remained practically intact throughout photocatalytic treatment, though slight changes/decreases in particle size/partial surface deformation and agglomeration coverage were observed, particularly during LF/PS/UV-A treatment. The presence of RB5 and its degradation products on the LF surface revealed that surface adsorption played a major role in LF-mediated photocatalysis. The Fe-content did not deviate appreciably from its original value after photocatalytic treatment.

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“…Based on the established presumption, the agglomeration of catalyst takes place in acidic conditions (below pH � 6) which leads to the decreased surface area, and hence less active sites. In case of basic conditions, the surface of the catalyst may become negatively charged due to excess hydroxyl ions, which repel the anionic Congo red dye [45,47].…”

Section: Effect Of Phmentioning

confidence: 99%

Synthesis, Characterization, and Photocatalytic Activity of Mixed-Ligand Cerium(III) and Bismuth(III) Complexes

Latif

Saeed

Imran

et al. 2022

Journal of Chemistry

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Two ternary complexes (Ce(sal)3(phen)2) (1) and (Bi(sal)3(phen)2) (2) with salicylic acid (sal) and 1,10-phenanthroline (phen) have been synthesized and characterized by analytical techniques such as UV-visible spectroscopy, FT-IR spectroscopy, PXRD, and SEM. The UV-visible study indicated the shifting of peak positions of metal complexes compared with the individual ligands whereas FT-IR analysis demonstrated that the metals were successfully coordinated with different functional groups of the ligands. The photocatalytic properties of prepared complexes were evaluated against Congo red dye as a model pollutant under ultraviolet and sunlight irradiation. The degradation efficiency of complex (2) was greater than that of complex (1). The results indicated that the investigated complexes can be employed as potential candidates for photocatalytic breakdown of synthetic dyes and can be safely recommended for environmental remediation.

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Impacts of Annealing Temperature on Morphological, Optical and Photocatalytic Properties of Gel-Combustion-Derived LaFeO3 Nanoparticles

Cited by 12 publications

References 66 publications

Ti2O3/TiO2-Assisted Solar Photocatalytic Degradation of 4-tert-Butylphenol in Water

Ti2O3/TiO2-Assisted Solar Photocatalytic Degradation of 4-tert-Butylphenol in Water

More about Persulfate-Assisted Ferrilanthanide-Mediated Photocatalysis of Textile Industry Dye Reactive Black 5: Surface Properties and Structural Assessment

Synthesis, Characterization, and Photocatalytic Activity of Mixed-Ligand Cerium(III) and Bismuth(III) Complexes

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