Facile synthesis of CuCr2O4/BiOBr nanocomposite and its photocatalytic activity towards RhB and tetracycline hydrochloride degradation under household visible LED light irradiation

Ghorai, Kalyan; Bhattacharjee, Monotosh; Mandal, Debasish; Hossain, Akbar; Bhunia, Trilochan; Das, Mukunda P.; Ray, Partha Pratim; Show, Bibhutibhushan; Bera, Parthasarathi; Mandal, Tapas Kumar; Seikh, Md. Motin; Gayen, Arup

doi:10.1016/j.jallcom.2020.157947

Cited by 36 publications

(8 citation statements)

References 75 publications

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“…The formation of the BiOBr@G composite is further confirmed through Raman spectroscopy, and the resulting Raman spectrum is shown in Figure b. The A 1g internal stretching mode of Bi-Br in BiOBr corresponds to the strong Raman band appearing at 112.2 cm –1 . , Additionally, no obvious Raman signals are observed around 1346 or 1595 cm –1 for pure BiOBr. A characteristic peak of BiOBr is also observed at 114.5 cm –1 for the BiOBr@G composite.…”

Section: Resultsmentioning

confidence: 78%

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Green Assembly of Covalently Linked BiOBr/Graphene Composites for Efficient Visible Light Degradation of Dyes

Tie

Bhattacharyya²,

Han

et al. 2022

ACS Omega

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A novel high-performance BiOBr@graphene (BiOBr@G) photocatalyst with a new assembly structure had been demonstrated using a facile hydrothermal method through chemical bonding of reduced graphene oxide and structure-defined BiOBr flakes for improving charge separation and transfer performance, which were first synthesized at room temperature in immiscible solvents without corrosive acids. The prepared samples were characterized, and the BiOBr@G composite realized an efficient assembly portfolio of graphene and BiOBr flakes with defined structures, verified by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman and X-ray photoelectron spectroscopy (XPS), in which BiOBr flakes were covalently linked with the assembled graphene sheets through the Bi–C bond. This composite exhibited remarkable visible light absorbance and efficient photoinduced charge splitting characteristics in comparison with those of pure BiOBr, as established by DRS absorption, photoluminescence radiation, and photocurrent study. Hence, a very small amount (5 mg) of the BiOBr@G composite displayed a complete photodegradation effect on the rhodamine B dye under only 15 min of visible light excitation, which was three times faster than that of pure BiOBr and extremely superior to that of commercial P25. This was probably ascribed to the well-defined BiOBr structure itself, elevated light absorbance, and Bi–C chemical bond inducing quick charge separation and transfer in the BiOBr@G composite. Additionally, investigations on the photocatalytic mechanism displayed that the photogenerated holes in the BiOBr valence band and derivative superoxide radicals played vital roles in the photodegradation of RhB dyes, as reinforced by the electron spin resonance method, where the covalent linking of BiOBr and graphene served as an effective pathway for charge transportation.

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Section: Resultsmentioning

confidence: 78%

“…The A 1g internal stretching mode of Bi-Br in BiOBr corresponds to the strong Raman band appearing at 112.2 cm −1 . 26,27 Additionally, no obvious Raman signals are observed around 1346 or 1595 cm −1 for pure BiOBr. A characteristic peak of BiOBr is also observed at 114.5 cm −1 for the BiOBr@G composite.…”

Section: Resultsmentioning

confidence: 93%

Green Assembly of Covalently Linked BiOBr/Graphene Composites for Efficient Visible Light Degradation of Dyes

Tie

Bhattacharyya²,

Han

et al. 2022

ACS Omega

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“…The results exhibited typical IV-type adsorption-desorption isotherm curves with an H3 hysteresis loop, suggesting that all the catalysts feature meso-porous structures. 6,37,38 Table 1 provides information on the surface area, pore volume, and typical pore diameter. The BET surface areas of BiOBr, PbMoO 4 , and PMB-3 are 18.69 m 2 g À1 , 22.27 m 2 g À1 , and 12.2 m 2 g À1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The results exhibited typical IV-type adsorption–desorption isotherm curves with an H3 hysteresis loop, suggesting that all the catalysts feature meso-porous structures. 6,37,38…”

Section: Resultsmentioning

confidence: 99%

Superior stability and activity of a PbMoO₄/BiOBr nanocomposite for enhanced catalytic oxidative desulfurization of actual fuel

et al. 2023

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“…The Al 2p orbital located at 74.56 eV can be assigned to the Al–O–Cu bond of CuAl 2 O 4 by the high resolution Cr 2p spectrum of spinel CuCr 2 O 4 oxides as shown in Figure S1e. The binding energies at 576.46, 578.59, and 582.73 eV belong to the Cr 2p3/2 orbital, while the binding energies at 586.30 and 588.47 eV belong to the Cr 2p1/2 orbital, corresponding to Cr 3+ ion in CuCr 2 O 4 oxides. , Figure S1h shows the Fe 2p spectrum of spinel CuFe 2 O 4 oxides. The binding energies at 710.49 and 712.92 eV represent Fe 2p3/2, whereas the binding energies at 724.07 and 726.46 eV are for Fe 2p1/2 of Fe 3+ and the two satellite peaks at 718.64 and 733.89 eV are attributed to Fe 3+ in CuFe 2 O 4 oxides …”

Section: Resultsmentioning

confidence: 99%

Spinel CuB₂O₄ (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Han

Wang

Chen

et al. 2022

ACS Appl. Nano Mater.

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A polyacrylamide gel method has been used to synthesize spinel type nano-CuB2O4 with cubic phase (B = Al) and tetragonal phase (B = Cr and Fe). The phase structure, functional group information, and charge state characterization confirm that the CuAl2O4 oxides contain no impurities, while CuCr2O4 and CuFe2O4 contain CuO impurities. The CuAl2O4 oxides exhibit a small particle size of 25 nm, high optical band gap (E g) value, high adsorption capacity for the adsorption of Congo red dye, and high photocatalytic activity for the photocatalytic degradation of tetracycline hydrochloride (TCH), which are much better than those of the CuCr2O4 and CuFe2O4 oxides. The high adsorption capacity for the CuAl2O4 oxides can be ascribed to the larger zero charge point (pHPZC) values, unique crystal structure, pore filling, electrostatic interaction, and hydrogen bond force. Photocatalytic degradation of antibiotics by CuB2O4 (B = Al, Cr, and Fe) shows high selectivity and B ion and crystal structure dependencies. The CuAl2O4 oxides exhibit high photocatalytic activity for the photocatalytic degradation of TCH and oxycline hydrochloride (OCH) and poor photocatalytic activity for the photocatalytic degradation of metformin hydrochloride (MFH) and naproxen sodium (NPS). Cyclic stability tests and XRD results further confirm that CuAl2O4 oxide is recyclable and stable. The high photocatalytic activity of CuAl2O4 oxides was explained in terms of the synergetic effects of the optical absorption coefficient, specific surface area, crystal structure, adsorbed oxygen concentration, chemical structure of the antibiotic, and conduction band and valence band potentials. The trapping experiments confirmed that TCH photodegradation in this reaction system occurs via photogenerated holes (hVB +) and superoxide radicals (•O2 –).

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Facile synthesis of CuCr2O4/BiOBr nanocomposite and its photocatalytic activity towards RhB and tetracycline hydrochloride degradation under household visible LED light irradiation

Cited by 36 publications

References 75 publications

Green Assembly of Covalently Linked BiOBr/Graphene Composites for Efficient Visible Light Degradation of Dyes

Green Assembly of Covalently Linked BiOBr/Graphene Composites for Efficient Visible Light Degradation of Dyes

Superior stability and activity of a PbMoO₄/BiOBr nanocomposite for enhanced catalytic oxidative desulfurization of actual fuel

Spinel CuB₂O₄ (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

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Facile synthesis of CuCr2O4/BiOBr nanocomposite and its photocatalytic activity towards RhB and tetracycline hydrochloride degradation under household visible LED light irradiation

Cited by 36 publications

References 75 publications

Green Assembly of Covalently Linked BiOBr/Graphene Composites for Efficient Visible Light Degradation of Dyes

Green Assembly of Covalently Linked BiOBr/Graphene Composites for Efficient Visible Light Degradation of Dyes

Superior stability and activity of a PbMoO4/BiOBr nanocomposite for enhanced catalytic oxidative desulfurization of actual fuel

Spinel CuB2O4 (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Contact Info

Product

Resources

About

Superior stability and activity of a PbMoO₄/BiOBr nanocomposite for enhanced catalytic oxidative desulfurization of actual fuel

Spinel CuB₂O₄ (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics