One pot synthesis of CdS/BiOBr/Bi2O2CO3: A novel ternary double Z-scheme heterostructure photocatalyst for efficient degradation of atrazine

Majhi, Dibyananda; Das, Krishnendu; Mishra, Abtar; Dhiman, Rohan; Mishra, Braja Gopal

doi:10.1016/j.apcatb.2019.118222

Cited by 217 publications

(43 citation statements)

References 71 publications

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“…further confirms that the WO 3 -Cu hybrids are successfully synthesized. The valence band (E VB ) and conduction band (E CB ) edge of WO 3 sample at the point of zero charge can be calculated by the empirical equation E VB = X-E e +0.5E g , where X is the electronegativity of the semiconductor, E e is the energy of free electrons on the hydrogen scale (about 4.5 eV), E g is the band gap energy of the semiconductor, and E CB can be determined by E CB =E VB -E g [20][21][22][23] . Based on the above equation and the DRS spectra, the E CB and E VB of WO 3 sample were calculated to be 0.83 and 3.38 eV.…”

Section: Resultsmentioning

confidence: 99%

Facilely Anchoring Cu nanoparticles on WO₃ Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Xiong¹,

Luo²,

Zhao³

et al. 2021

Journal of Inorganic Materials

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Non-noble metal decoration is a promising strategy for promoting semiconductor photocatalysis by effectively enhancing charge separation. Cube-like WO 3-Cu hybrid was successfully synthesized by a facile ascorbic acid reduction method at room temperature. The composition and morphology characterization showed that the Cu particle was deposited on the surface of WO 3 nanocube. The WO 3-Cu-1.0 hybrid (when 1.0 mmol CuSO 4 •5H 2 O was involved into the reaction system) exhibited promoted photocatalytic capability towards Congo Red photodegradation under simulated sun light irradiation. The trapping experiments of active species during photocatalysis and ESR spectra of DMPO•OH signal of WO 3-Cu-1.0 composite confirmed that the photogenerated holes (h +), •OH, and •O 2 were the predominant active species during Conge Red degradation. Based on the photo/electro-chemical measurements, it was proposed that efficient charge transfer was accomplished between the WO 3 nanocube and Cu nanoparticles, which promoted electron-holes separation and subsequently photocatalysis reaction in the Congo Red solution. This work provides a facile preparation method for a binary photocatalyst system in which a semiconductor coupled with non-noble metal.

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Section: Resultsmentioning

confidence: 99%

Facilely Anchoring Cu nanoparticles on WO₃ Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Xiong¹,

Luo²,

Zhao³

et al. 2021

Journal of Inorganic Materials

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“…Overall, the cell viability of the final nanocomposite, Pt-Ag 3 PO 4 /CdS/chitosan, was recorded as more than 75% in low concentrations and 61% in high concentrations in both 24 and 48 h of treatment. Based on the available literature [ 96 , 97 ], CdS NPs can endorse the cytotoxic effect in different cell lines including HepG2, HeLa, PC12, and HEK-293 cell lines. However, in this study, the cytotoxicity effect promoted by addition of CdS was much lower, which may be because of the unavailable CdS sites on the surface.…”

Section: Resultsmentioning

confidence: 99%

Novel Pt-Ag3PO4/CdS/Chitosan Nanocomposite with Enhanced Photocatalytic and Biological Activities

et al. 2020

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Decorating photocatalysts with noble metal nanoparticles (e.g., Pt) often increases the catalysts’ photocatalytic activity and biomedical properties. Here, a simple and inexpensive method has been developed to prepare a Pt-Ag3PO4/CdS/chitosan composite, which was characterized and used for the visible light-induced photocatalytic and antibacterial studies. This synthesized composite showed superior photocatalytic activity for methylene blue degradation as a hazardous pollutant (the maximum dye degradation was observed in 90 min of treatment) and killing of Gram positive bacterial (Staphylococcus aureus and Bacillus cereus) as well as Gram negative bacteria (Klebsiella pneumoniae, Salmonella typhimurium, Escherichia coli, and Pseudomonas aeruginosa) under visible light irradiation. The antibacterial activity of CdS, CdS/Ag3PO4, and Pt-Ag3PO4/CdS/chitosan against E. coli, Pseudomonas aeruginosa, Salmonella typhimurium, Klebsiella pneumoniae, Staphylococcus aureus, and Bacillus cereus showed the zone of inhibition (mm) under visible light and under dark conditions at a concentration of 20 µg mL−1. Furthermore, the cell viability of the CdS/chitosan, Ag3PO4, Ag3PO4/CdS/chitosan, and Pt-Ag3PO4/CdS/chitosan were investigated on the human embryonic kidney 293 cells (HEK-293), Henrietta Lacks (HeLa), human liver cancer cell line (HepG2), and pheochromocytoma (PC12) cell lines. In addition, the results indicated that the photodegradation rate for Pt-Ag3PO4/CdS/chitosan is 3.53 times higher than that of CdS and 1.73 times higher than that of the CdS/Ag3PO4 composite. Moreover, Pt-Ag3PO4/CdS/chitosan with an optimal amount of CdS killed large areas of different bacteria and different cells separately in a shorter time period under visible-light irradiation, which shows significantly higher efficiency than pure CdS and other CdS/Ag3PO4 composites. The superb performances of this composite are attributed to its privileged properties, such as retarded recombination of photoinduced electron/hole pairs and a large specific surface area, making Pt-Ag3PO4/CdS/chitosan a valuable composite that can be deployed for a range of important applications, such as visible light-induced photocatalysis and antibacterial activity.

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“…Under this scheme of electron transfer, the CB electrons in SnS 2 component possess sufficient ‘–ve’ potential to reduce dissolved dioxygen to O 2 . – radicals …”

Section: Resultsmentioning

confidence: 99%

“…Upon exposure, they act on the endocrine system by mimicking, blocking and/or interfering with the natural instructions of hormone to cells. Many chemical entities including ployhalogenated aromatics, phenolic compounds, phthalates, pesticides, steroidal hormones, pharmaceuticals and personal care products have been listed as EDCs . Among different categories of EDCs, pesticides/insecticides/herbicides are used in large quantities in agricultural sector to meet the rising demands of food production and preservation.…”

Section: Introductionmentioning

confidence: 99%

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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One pot synthesis of CdS/BiOBr/Bi2O2CO3: A novel ternary double Z-scheme heterostructure photocatalyst for efficient degradation of atrazine

Cited by 217 publications

References 71 publications

Facilely Anchoring Cu nanoparticles on WO₃ Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Facilely Anchoring Cu nanoparticles on WO₃ Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Novel Pt-Ag3PO4/CdS/Chitosan Nanocomposite with Enhanced Photocatalytic and Biological Activities

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

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One pot synthesis of CdS/BiOBr/Bi2O2CO3: A novel ternary double Z-scheme heterostructure photocatalyst for efficient degradation of atrazine

Cited by 217 publications

References 71 publications

Facilely Anchoring Cu nanoparticles on WO3 Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Facilely Anchoring Cu nanoparticles on WO3 Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Novel Pt-Ag3PO4/CdS/Chitosan Nanocomposite with Enhanced Photocatalytic and Biological Activities

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

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Facilely Anchoring Cu nanoparticles on WO₃ Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Facilely Anchoring Cu nanoparticles on WO₃ Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

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