Hydrothermal crystallization of bismuth oxybromide (BiOBr) in the presence of different shape controlling agents

Bárdos, Enikő; Márta, Viktória; Baia, Lucian; Todea, M.; Kovács, Gábor; Baán, Kornélia; Garg, Seema; Pap, Zsolt; Hernádi, Klára

doi:10.1016/j.apsusc.2020.146184

Cited by 37 publications

(20 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…red frames). This phenomenon was already noticed in our previous work, when urea was applied as additive during the hydrothermal crystallization of BiOBr [20].…”

Section: Morphological Characterizationsupporting

confidence: 78%

“…red frames). This phenomenon was already noticed in our previous work, when urea was applied as additive during the hydrothermal crystallization of BiOBr [20]. As it can be seen the SEM micrographs the used additives influenced the particle morphology and also the orientation of the crystals as well.…”

Section: Morphological Characterizationsupporting

confidence: 77%

“…In our previous work, we proved that the surface tension of the synthesis solution could affect the specific surface area, crystallographic planes ratio, primary and hierarchical sizes and the photocatalytic activity of BiOBr [ 20 ]. So, it is mandatory to investigate the relationship between the surface tension and the previously mentioned properties.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrothermal Crystallization of Bismuth Oxychlorides (BiOCl) Using Different Shape Control Reagents

et al. 2021

Self Cite

View full text Add to dashboard Cite

Bismuth oxychloride photocatalysts were obtained using solvothermal synthesis and different additives (CTAB—cetyltrimethylammonium bromide, CTAC—cetyltrimethylammonium chloride, PVP–polyvinylpyrrolidone, SDS–sodium dodecylsulphate, U—urea and TU—thiourea). The effect of the previously mentioned compounds was analyzed applying structural (primary crystallite size, crystal phase composition, etc.), morphological (particle geometry), optical (band gap energy) parameters, surface related properties (surface atoms’ oxidation states), and the resulted photocatalytic activity. A strong dependency was found between the surface tension of the synthesis solutions and the overall morpho-structural parameters. The main finding was that the characteristics of the semiconductors can be tuned by modifying the surface tension of the synthesis mixture. It was observed after the photocatalytic degradation, that the white semiconductor turned to grey. Furthermore, we attempted to explain the gray color of BiOCl catalysts after the photocatalytic decompositions by Raman and XPS studies.

show abstract

“…red frames). This phenomenon was already noticed in our previous work, when urea was applied as additive during the hydrothermal crystallization of BiOBr [20].…”

Section: Morphological Characterizationsupporting

confidence: 78%

Section: Morphological Characterizationsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrothermal Crystallization of Bismuth Oxychlorides (BiOCl) Using Different Shape Control Reagents

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is worth mentioning that the samples obtained by us in mannitol solution compare to the BiOX (X = Cl, Br, I) photocatalyst prepared via surfactants: hexadecyl(trimethyl)ammonium bromide (CTAB) [35,47,48], PVP [39], or sodium dodecyl sulfate (SDS) [39] reported in literature showed remarkable higher photocatalytic performance toward RhB oxidation.…”

Section: Photocatalytic Activitymentioning

confidence: 91%

“…The existence of Bi 4+ and Bi 5+ in BiOX materials was surprising and rarely reported in the literature. Species such as Bi 4+ and Bi 5+ were presented in BiOBr prepared with shape controlling agent polyvinylpyrrolidone (PVP) [39] or in other bismuth-based materials (Bi 2 WO 6 ) [40]. Bismuth at the higher oxidation state than Bi 3+ was observed in BiOCl x I 1−x solid solution and was responsible for enhanced electron transfer, thus photocatalytic activity [41].…”

Section: Xps Analysismentioning

confidence: 99%

Morphology Regulation Mechanism and Enhancement of Photocatalytic Performance of BiOX (X = Cl, Br, I) via Mannitol-Assisted Synthesis

et al. 2021

View full text Add to dashboard Cite

BiOX (X=Cl, Br, I) photocatalysts with dominant (110) facets were synthesized via a mannitol-assisted solvothermal method. This is the first report on the exposed (110) facets-, size-, and defects-controlled synthesis of BiOX achieved by solvothermal synthesis with mannitol. This polyol alcohol acted simultaneously as a solvent, capping agent, and/or soft template. The mannitol concentration on the new photocatalysts morphology and surface properties was investigated in detail. At the lowest concentration tested, mannitol acted as a structure-directing agent, causing unification of nanoparticles, while at higher concentrations, it functioned as a solvent and soft template. The effect of exposed (110) facet and surface defects (Bi(3−x)+, Bi4+, Bi5+) of BiOX on the photocatalytic activity of nanomaterials under the UV–Vis irradiation were evaluated by oxidation of Rhodamine B (RhB) and 5-fluorouracil (5-FU), an anticancer drug, and by reduction of Cr(VI). Additionally, the influence of crucial factors on the formation of BiOX in the synthesis with mannitol was discussed extensively, and the mechanism of BiOX formation was proposed. These studies presented a new simple method for synthesizing BiOX without any additional surfactants or shape control agents with good photocatalytic activity. The study also provided a better understanding of the effects of solvothermal conditions on the BiOX crystal growth.

show abstract

Synthesis of BiOBr/graphene oxide photocatalyst assisted by sodium dodecyl sulfate for efficient degradation of organic pollutants

Yang,

Liu,

et al. 2024

Applied Organom Chemis

View full text Add to dashboard Cite

Surfactant‐assisted synthesis of photocatalysts for water treatment has received extensive attention from researchers. In this paper, a novel and efficient BiOBr/graphene oxide (BiOBr/GO) photocatalyst assisted by sodium dodecyl sulfate (SDS) was synthesized by a simple solvothermal method. Compared with use of other surfactants, like polyvinylpyrrolidone (PVP) and cetyltrimethylammonium bromide (CTAB), BiOBr/GO (SDS) shows outstanding photocatalytic degradation activity under optimal conditions: The degradation rate constants of BiOBr/GO (SDS) for oxytetracycline (OTC), tetracycline hydrochloride (TCH), brilliant blue (BB), and Rhodamine B (RhB) are 0.073, 0.057, 0.166, and 0.626 min−1, which are 2.8, 1.8, 9, and 1.5 times larger than pure BiOBr, respectively. In addition, after five cycles, BiOBr/GO (SDS) exhibits superior cycling stability. The enhanced photocatalytic performance can benefit from the introduction of SDS and GO. With the assistance of SDS in the preparation process, BiOBr/GO (SDS) nanosheets have good adsorption performance and dispersion effect, which is favorable for raising their specific surface area. Meanwhile, the electron capture effect of GO improves the transfer and separation efficiency of photogenerated carriers. Moreover, the possible degradation pathway for TCH is identified through liquid chromatography–mass spectrometry (LC–MS). This research can become a valuable reference for synthesizing photocatalysts with visible light response to degrading organic pollutants such as antibiotics and dyes.

show abstract

Hydrothermal crystallization of bismuth oxybromide (BiOBr) in the presence of different shape controlling agents

Cited by 37 publications

References 42 publications

Hydrothermal Crystallization of Bismuth Oxychlorides (BiOCl) Using Different Shape Control Reagents

Hydrothermal Crystallization of Bismuth Oxychlorides (BiOCl) Using Different Shape Control Reagents

Morphology Regulation Mechanism and Enhancement of Photocatalytic Performance of BiOX (X = Cl, Br, I) via Mannitol-Assisted Synthesis

Synthesis of BiOBr/graphene oxide photocatalyst assisted by sodium dodecyl sulfate for efficient degradation of organic pollutants

Contact Info

Product

Resources

About