Facile synthesis of α/β-Bi2O3 hetero-phase junction by a solvothermal method for enhanced photocatalytic activities

Yu, Xin; Feng, Qingge; Ma, Dong; Lin, Haiying; Liu, Zheng; Zhang, Shuai; Huang, Xianqing; Dong, Xiyuan; Ye, Lei; Wang, Dongbo

doi:10.1016/j.mcat.2021.111431

Cited by 16 publications

(6 citation statements)

References 61 publications

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“…3c shows, two peaks at around 529.8 eV and 531.1 eV for Bi 2 O 3 could be correspondingly assigned to the lattice oxygen (Bi–O) and surface hydroxyl groups (–OH). 49,50 This was further evidenced by the EPR spectra (Fig. 4b).…”

Section: Resultssupporting

confidence: 54%

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Non-precious cobalt–bismuth binary oxide as a superior catalyst for the highly selective aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid in aqueous solvent

Zhang,

Chen,

Pan

et al. 2024

New J. Chem.

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Section: Resultssupporting

confidence: 54%

“…3c -O) and surface hydroxyl groups (-OH). 49,50 This was further evidenced by the EPR spectra (Fig. 4b).…”

Section: Characterization Of Catalystssupporting

confidence: 55%

Non-precious cobalt–bismuth binary oxide as a superior catalyst for the highly selective aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid in aqueous solvent

Zhang,

Chen,

Pan

et al. 2024

New J. Chem.

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“…To date, “state-of-the-art” photocatalysts used in the photocatalytic decomposition of RhB are typically semiconductors such as UV-light-driven TiO 2 , − ZnO, as well as visible-light-driven g-C 3 N 4 , ,, and Bi 2 O 3 . ,,, However, it is challenging to compare the efficiency of the different semiconductors because of the lack of a uniform photocatalysis setup (catalyst loading, dye concentration, particle surface area, and light source; see Table S16). Compared to visible-light-driven photocatalysts such as g-C 3 N 4 , , and α-/β-Bi 2 O 3 , the as-prepared Bi 14 O 20 (ReO 4.5 ) ( 3c ) shows a lower RhB conversion. Under UV irradiation, TiO 2 , and ZnO also provide improved RhB conversion compared to compound 3c .…”

Section: Discussionmentioning

confidence: 99%

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi₂O₃:M (M = S, Se, and Re)

et al. 2022

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δ-Bi 2 O 3 :M (M = S, Se, and Re) with an oxygendefective f luorite-type structure is obtained by a coprecipitation m e t h o d s t a r t i n g f r o m t h e b i s m u t h o x i d o c l u s t e r [Bi 38 O 45 (OMc) 24 (dmso) 9 ]•2dmso•7H 2 O (A) in the presence of additives such as Na 2 SO 4 , Na 2 SeO 4 , NH 4 ReO 4 , Na 2 SeO 3 •5H 2 O, and Na 2 SO 3 . The coprecipitation of the starting materials with aqueous NaOH results in the formation of alkaline reaction mixtures, and the cubic bismuth(III)-based oxides Bi 14 O 20 (SO 4 ) ( 1 c ) , B i 1 4 O 2 0 ( S e O 4 ) (2 c ) , B i 1 4 O 2 0 ( R e O 4 . 5 ) (3 c ) , Bi 12.25 O 16.625 (SeO 3 ) 1.75 (4c), and Bi 10.51 O 14.765 (SO 3 ) 0.49 (SO 4 ) 0.51 (5c) are obtained after microwave-assisted heating; formation of compound 5c is the result of partial oxidation of sulfur. The compounds 1c, 2c, 4c, and 5c absorb UV light only, whereas compound 3c absorbs in the visible-light region of the solar spectrum. Thermal treatment of the as-prepared metastable bismuth(III) oxide chalcogenates 1c and 2c at T = 600 °C provides a monotropic phase transition into their tetragonal polymorphs Bi 14 O 20 (SO 4 ) (1t) and Bi 14 O 20 (SeO 4 ) (2t), while compound 3c is transformed into the tetragonal modification of Bi 14 O 20 (ReO 4.5 ) (3t) after calcination at T = 700 °C. Compounds of the systems Bi 2 O 3 −SO x (x = 2 and 3) and Bi 2 O 3 −Re 2 O 7 are thermally stable up to T = 800 °C, whereas compounds of the system Bi 2 O 3 −SeO 3 completely lose SeO 3 . Thermal treatment of 4c and 5c in air results in the oxidation of the tetravalent to hexavalent sulfur and selenium, respectively, upon heating to T = 400−500 °C. The as-prepared cubic bismuth(III)-based oxides 1c−5c were studied with regard to the photocatalytic decomposition of rhodamine B under visible-light irradiation with compound 3c showing the highest turnover and efficiency.

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“…Bi 2 O 3 has a low band gap (2.3-3.3 eV) [33], and photogenerated electron-hole pairs (e --h + ) are formed in Bi 2 O 3 under the action of incident light, which has been proven to be a potential photocatalyst for the removal of RhB dyes [34][35][36][37]. In the last decade, due to its low toxicity and potentially high-activity photocatalysts, Bi 2 O 3 in a variety of forms, such as nanoparticles [38][39][40], needles [41], nanorods [42][43][44], nanobelts [45,46], thin films [47], and flower-like forms [48][49][50][51], has been synthesized through chemical precipitation [52,53], hydrothermal [54,55], microwave [56], chemical deposition [57], and electrospinning methods [58], and it has been used for the photocatalytic removal of RhB pollutants.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Photocatalytic Performance, Mechanism, and Degradation Pathways of Rhodamine B with Bi2O3 Microrods under Visible-Light Irradiation

Ma,

Tang,

et al. 2024

Materials

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In the present work, the photodegradation of Rhodamine B with different pH values by using Bi2O3 microrods under visible-light irradiation was studied in terms of the dye degradation efficiency, active species, degradation mechanism, and degradation pathway. X-ray diffractometry, polarized optical microscopy, scanning electron microscopy, fluorescence spectrophotometry, diffuse reflectance spectra, Brunauer–Emmett–Teller, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, UV–visible spectrophotometry, total organic carbon, and liquid chromatography–mass spectroscopy analysis techniques were used to analyze the crystal structure, morphology, surface structures, band gap values, catalytic performance, and mechanistic pathway. The photoluminescence spectra and diffuse reflectance spectrum (the band gap values of the Bi2O3 microrods are 2.79 eV) reveals that the absorption spectrum extended to the visible region, which resulted in a high separation and low recombination rate of electron–hole pairs. The photodegradation results of Bi2O3 clearly indicated that Rhodamine B dye had removal efficiencies of about 97.2%, 90.6%, and 50.2% within 120 min at the pH values of 3.0, 5.0, and 7.0, respectively. In addition, the mineralization of RhB was evaluated by measuring the effect of Bi2O3 on chemical oxygen demand and total organic carbon at the pH value of 3.0. At the same time, quenching experiments were carried out to understand the core reaction species involved in the photodegradation of Rhodamine B solution at different pH values. The results of X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffractometer analysis of pre- and post-Bi2O3 degradation showed that BiOCl was formed on the surface of Bi2O3, and a BiOCl/Bi2O3 heterojunction was formed after acid photocatalytic degradation. Furthermore, the catalytic degradation of active substances and the possible mechanism of the photocatalytic degradation of Rhodamine B over Bi2O3 at different pH values were analyzed based on the results of X-ray diffractometry, radical capture, Fourier-transform infrared spectroscopy, total organic carbon analysis, and X-ray photoelectron spectroscopy. The degradation intermediates of Rhodamine B with the Bi2O3 photocatalyst in visible light were also identified with the assistance of liquid chromatography–mass spectroscopy.

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Facile synthesis of α/β-Bi2O3 hetero-phase junction by a solvothermal method for enhanced photocatalytic activities

Cited by 16 publications

References 61 publications

Non-precious cobalt–bismuth binary oxide as a superior catalyst for the highly selective aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid in aqueous solvent

Non-precious cobalt–bismuth binary oxide as a superior catalyst for the highly selective aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid in aqueous solvent

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi₂O₃:M (M = S, Se, and Re)

Investigation of the Photocatalytic Performance, Mechanism, and Degradation Pathways of Rhodamine B with Bi2O3 Microrods under Visible-Light Irradiation

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Facile synthesis of α/β-Bi2O3 hetero-phase junction by a solvothermal method for enhanced photocatalytic activities

Cited by 16 publications

References 61 publications

Non-precious cobalt–bismuth binary oxide as a superior catalyst for the highly selective aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid in aqueous solvent

Non-precious cobalt–bismuth binary oxide as a superior catalyst for the highly selective aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid in aqueous solvent

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi2O3:M (M = S, Se, and Re)

Investigation of the Photocatalytic Performance, Mechanism, and Degradation Pathways of Rhodamine B with Bi2O3 Microrods under Visible-Light Irradiation

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Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi₂O₃:M (M = S, Se, and Re)