Combustion synthesis, characterization and photocatalytic application of CuS/Bi4Ti3O12 p-n heterojunction materials towards efficient degradation of 2-methyl-4-chlorophenoxyacetic acid herbicide under visible light

Das, Krishnendu; Majhi, Dibyananda; Bhoi, Yagna Prakash; Mishra, Braja Gopal

doi:10.1016/j.cej.2019.01.060

Cited by 105 publications

(32 citation statements)

References 65 publications

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“…The survey spectrum confirms the presence of Bi, Ti, Sn, S and O along with the adventitious carbon in the sample (Figure a). In the high resolution spectra of ‘Bi’, a doublet at 158.8 and 164.1 eV is due to photoemission from 4f 7/2 and 4f 5/2 energy states of Bi (III) in coordination with oxide ions (Figure b) . The spectrum of Ti shows an asymmetric doublet in the spectral range of 455–470 eV (Figure c).…”

Section: Resultssupporting

confidence: 86%

“…Recently, Bi 4 Ti 3 O 12 has been modified by doping with different metals (Cr, Fe, and V) as well as coupling with low band gap semiconductor materials (MoS 2 , CuS, BiOI, g‐C 3 N 4 , BiOBr and Bi 2 S 3 ) to improve its optical and photocatalytic activity. The modified analogues of Bi 4 Ti 3 O 12 have been studied as photocatalyst for degradation of industrial dyes, pharmaceutical contaminants and hydrogen evolution reaction …”

Section: Introductionmentioning

confidence: 72%

“…The sharp peak at 457.2 eV is due to photoemission from 2p 3/2 energy state of Ti(IV) species. The broad and intense peak at 464.8 eV could be fitted to two Lorentzian peaks at 463.1 and 465.0 eV, which account for the photoelectron emission from the Ti 2p 1/2 and Bi 4d 3/2 microstates, respectively . In the Sn 3d region, the peaks at 487.3 and 495.5 eV correspond to the 3d 5/2 and 3d 3/2 energy levels of Sn(IV) in coordination with sulfide ions (Figure d) .…”

Section: Resultsmentioning

confidence: 99%

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SnS₂/Bi₄Ti₃O₁₂ Heterostructure Material: A UV‐Visible Light Active Direct Z‐Scheme Photocatalyst for Aqueous Phase Degradation of Diazinon

et al. 2020

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In this study, a series of Z-scheme SnS 2 /Bi 4 Ti 3 O 12 heterostructure photocatalyst materials were synthesized by a two-step process. Initially, Bi 4 Ti 3 O 12 (BT) nanopellets with planar dimension of 350-400 nm were prepared by a facile combustion synthesis route. The SnS 2 nanoparticles (10-20 nm) were subsequently decorated over BT surface using a hydrothermal method. The heterostrucure materials possess orthorhombic BT and hexagonal SnS 2 crystalline phases with high interfacial contact and strong interaction at microscopic level. Optical and photoelectrochemical (PEC) measurements suggest improved UVvisible light absorption and enhanced charge carrier separation and migration properties. The SnS 2 /Bi 4 Ti 3 O 12 materials displayed excellent photocatalytic activity for degradation of diazinon insecticide (> 90 % with k app ∼ 0.019 min À 1 ) in aqueous media under UV-visible light illumination. The valence band (VB) holes and * OH radicals were identified as major transient species responsible for photodegradation of diazinon. A Z-scheme electron transfer process has been proposed to explain adequately the generation of these radicals which was deduced from PEC measurements, scavenger and radical trapping experiments. Mechanistic study revealed that diazinon degradation occured in a series of steps to produce 2-isopropyl-6methyl-pyrimidin-4-ol as a major intermediate which was further mineralized over the photocatalyst surface. The process potential of the developed photocatalytic method has been tested for different water matrices and interfering anionic species with radical quenching activity.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

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SnS₂/Bi₄Ti₃O₁₂ Heterostructure Material: A UV‐Visible Light Active Direct Z‐Scheme Photocatalyst for Aqueous Phase Degradation of Diazinon

et al. 2020

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“…Photocatalytic water purification technology is considered as one of the promising application as it remove/separate the organic pollutants produced by the agricultural, textile and pharmaceutical industries. From the last few years, more research has been devoted to minimalizing such environmental problems [2][3][4][5][6]. Photocatalysis refers to the acceleration of chemical reactions (oxidation/reduction) at the catalyst surface under ultraviolet (UV) or visible radiation.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of nanocrystalline β-SnWO4: as a photocatalyst, biosensor and anode for Li-ion battery

et al. 2019

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Here, we have successfully synthesised β-SnWO 4 Nps via simple and low-cost co-precipitation method. XRD pattern confirms the wolframite cubic structure of β-SnWO 4 Nps which is belonging to P 213 or T 4 space group with an average crystallite size of ~38 nm. FTIR spectrum of β-SnWO 4 Nps shows the bands at 620-825 cm −1 is assigned to characteristical stretching and bending vibrational modes of WO 6 6 , W-W bonds and stretching vibration of W-O-W bridging bonds in β-SnWO 4. UV-DRS spectrum shows the strong absorption band edge at 604 nm and the estimated bandgap of β-SnWO 4 Nps is found to be 1.9 eV. The β-SnWO 4 shows excellent photocatalytic activity against indigo carminedye under various conditions of β-SnWO 4 Nps. In addition to this, the electrochemical senor performance toward the quantification of dopamine at nanomolar concentration and anode material for Li-ion batteries by showing high reversible discharge/ charge capacity was explored.

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“…Bismuth titanate (Bi 4 Ti 3 O 12 , BTO) with bandgap energy of ~ 3.1 eV [35], crystallizing in a layer structure constructed by an alternating stack of perovskite-like (Bi 2 Ti 3 O 10 ) 2− blocks and (Bi 2 O 2 ) 2+ units, has received much recent attention as an important semiconductor photocatalyst for photodegradation of organic pollutants [36][37][38][39][40][41]. Due to its special layer structure, Bi 4 Ti 3 O 12 exhibits a high anisotropy of photocatalytic properties.…”

Section: Introductionmentioning

confidence: 99%

Construction of 2D/0D/2D face-to-face contact g-C3N4@Au@Bi4Ti3O12 heterojunction photocatalysts for promising dye degradation

Gao

Zhao

Zhang

et al. 2020

Preprint

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Herein a new type of 2D/0D/2D face-to-face contact g-C 3 N 4 @Au@Bi 4 Ti 3 O 12 heterojunction photocatalysts have been developed. The ternary composite photocatalysts are constructed by coupling Bi 4 Ti 3 O 12 nanosheets with g-C 3 N 4 nanosheets face-to-face and sandwiching Au nanoparticles between Bi 4 Ti 3 O 12 and g-C 3 N 4 nanosheets. The as-prepared g-C 3 N 4 @Au@Bi 4 Ti 3 O 12 composite photocatalysts were systematically investigated by various characterization techniques including XRD, UV–vis DRS, FTIR, SEM, TEM and XPS. The degradation experiments were carried out by removing rhodamine B (RhB) from water under simulated sunlight. It is found that the g-C 3 N 4 @Au@Bi 4 Ti 3 O 12 composite photocatalysts exhibit much enhanced photodegradation performance when compared with bare Bi 4 Ti 3 O 12 and g-C 3 N 4 nanosheets, and moreover they exhibit excellent photocatalytic stability in recycling dye degradation. The underlying photodegradation mechanism of the g-C 3 N 4 @Au@Bi 4 Ti 3 O 12 composite photocatalysts was systematically investigated and discussed.

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Combustion synthesis, characterization and photocatalytic application of CuS/Bi4Ti3O12 p-n heterojunction materials towards efficient degradation of 2-methyl-4-chlorophenoxyacetic acid herbicide under visible light

Cited by 105 publications

References 65 publications

SnS₂/Bi₄Ti₃O₁₂ Heterostructure Material: A UV‐Visible Light Active Direct Z‐Scheme Photocatalyst for Aqueous Phase Degradation of Diazinon

SnS₂/Bi₄Ti₃O₁₂ Heterostructure Material: A UV‐Visible Light Active Direct Z‐Scheme Photocatalyst for Aqueous Phase Degradation of Diazinon

Facile synthesis of nanocrystalline β-SnWO4: as a photocatalyst, biosensor and anode for Li-ion battery

Construction of 2D/0D/2D face-to-face contact g-C3N4@Au@Bi4Ti3O12 heterojunction photocatalysts for promising dye degradation

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Combustion synthesis, characterization and photocatalytic application of CuS/Bi4Ti3O12 p-n heterojunction materials towards efficient degradation of 2-methyl-4-chlorophenoxyacetic acid herbicide under visible light

Cited by 105 publications

References 65 publications

SnS2/Bi4Ti3O12 Heterostructure Material: A UV‐Visible Light Active Direct Z‐Scheme Photocatalyst for Aqueous Phase Degradation of Diazinon

SnS2/Bi4Ti3O12 Heterostructure Material: A UV‐Visible Light Active Direct Z‐Scheme Photocatalyst for Aqueous Phase Degradation of Diazinon

Facile synthesis of nanocrystalline β-SnWO4: as a photocatalyst, biosensor and anode for Li-ion battery

Construction of 2D/0D/2D face-to-face contact g-C3N4@Au@Bi4Ti3O12 heterojunction photocatalysts for promising dye degradation

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SnS₂/Bi₄Ti₃O₁₂ Heterostructure Material: A UV‐Visible Light Active Direct Z‐Scheme Photocatalyst for Aqueous Phase Degradation of Diazinon

SnS₂/Bi₄Ti₃O₁₂ Heterostructure Material: A UV‐Visible Light Active Direct Z‐Scheme Photocatalyst for Aqueous Phase Degradation of Diazinon