Constructing novel visible-light-driven ternary photocatalyst of AgBr nanoparticles decorated 2D/2D heterojunction of g-C3N4/BiOBr nanosheets with remarkably enhanced photocatalytic activity for water-treatment

Tang, Guogang; Zhang, Feixia; Huo, Pengwei; Zulfiqarc, Syed; Xu, Jing; Yong-shen, Yan; Tang, Hua

doi:10.1016/j.ceramint.2019.06.167

Cited by 52 publications

(11 citation statements)

References 62 publications

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“…This reduction in intensities can be attributed to the interaction between C 3 N 4 and BiOBr, which may help to minimize the e − /h + recombination and accelerate the charge separation. [ 72 ] The shallow traps developed by adding further lattice defects and defect levels upon doping of Sm weakened the emission intensities, which is one of the leading causes that inhibit prepared QDs exciton recombination rate. [ 73 ] The prepared NCs Sm‐g‐C 3 N 4 doped‐BiOBr QDs are good candidates to de‐colorize the RhB.…”

Section: Resultsmentioning

confidence: 99%

Dye Degradation, Antimicrobial Activity, and Molecular Docking Analysis of Samarium‐Grafted Carbon Nitride Doped‐Bismuth Oxobromide Quantum Dots

Rani,

Imran,

Haider

et al. 2023

Global Challenges

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Various concentrations of samarium‐grafted‐carbon nitride (Sm‐g‐C3N4) doped‐bismuth oxobromide (BiOBr) quantum dots (QDs) are prepared by the co‐precipitation method. Elemental evaluation, morphological, optical, and functional group assessment are studied employing characterization techniques. Based on the XRD pattern analysis, it is determined that BiOBr exhibits a tetragonal crystal structure. The electronic spectroscopy revealed an absorption peak for BiOBr at 315 nm and the bandgap energy (Eg) decreasing from 3.9 to 3.8 eV with the insertion of Sm‐g‐C3N4. The presence of vibrational modes related to BiOBr at 550 cm−1 is confirmed through FTIR spectra. TEM revealed that pure BiOBr possessed non‐uniform QDS, and agglomeration increased with the addition of Sm‐g‐C3N4. The catalytic performance of Sm‐g‐C3N4 into BiOBr (6 mL) in a neutral medium toward rhodamine B exhibited excellent results (99.66%). The bactericidal activity is evaluated against multi‐drug resistance (MDR) Escherichia coli once the surface area is increased by dopant and the measured inhibition zone is assessed to be 3.65 mm. Molecular docking results supported the in vitro bactericidal potential of Sm‐g‐C3N4 and Sm‐g‐C3N4 doped‐BiOBr as DNA gyraseE. coli inhibitors. This study shows that the novel Sm‐g‐C3N4 doped‐BiOBr is a better catalyst that increases specific semiconductor's catalytic activity (CA).

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Section: Resultsmentioning

confidence: 99%

Dye Degradation, Antimicrobial Activity, and Molecular Docking Analysis of Samarium‐Grafted Carbon Nitride Doped‐Bismuth Oxobromide Quantum Dots

Rani,

Imran,

Haider

et al. 2023

Global Challenges

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“…The N 1s spectrum is shown in Figure 3 f, three peaks are fitted at 396.89, 398.95, and 402.54 eV, which are assigned to C-N=C, N-(C) 3 and N-H groups, respectively [ 12 ]. In Figure 3 g, two peaks could be observed at 366.90 and 372.39 eV, which were assigned to Ag 3d 5/2 and Ag 3d 3/2 [ 23 ] . Br 3d spectrum in Figure 3 h displayed two peaks at 68.23 and 69.52 eV which represent Br 3d 5/2 and Br 3d 3/2 [ 22 ].…”

Section: Resultsmentioning

confidence: 99%

“…Many photocatalytic composites were successfully prepared, such as LaNiO 3 /ZnIn 2 S 4 [ 18 ], LaNiO 3 /SnS 2 [ 19 ], LaNiO 3 /CdS [ 20 ] and LaNiO 3 /TiO 2 [ 21 ], which have made some progress in hydrogen production, dye degradation and tetracycline hydrochloride removal. Besides, as a semiconductor material with good photosensitivity, silver bromide (AgBr) is easy to synthesize, possesses stable physical and chemical properties, a narrow band gap, and outstanding renewability [ 22 , 23 ]. What’s more, numerous heterojunctions were synthesized based on AgBr according to previous researches such as AgPO 3 /AgBr/g-C 3 N 4 [ 24 ], BiOBr/AgBr/LaPO 4 [ 25 ], and AgBr/p-g-C 3 N 4 [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

et al. 2020

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Promoting the separation of photogenerated charges and enhanced optical absorption capacity is the main means to modify photocatalytic capacities to advance semiconductor photocatalyst applications. For the first time, a novel ternary photocatalyst for dual Z-scheme system AgBr/LaNiO3/g-C3N4 (ALG) was prepared via a modest ultrasound-assisted hydrothermal method. The results indicated that LaNiO3 nanoballs and AgBr nanoparticles were successfully grown on the surface of g-C3N4 nanosheets. A dual Z-scheme photocatalytic reaction system could be constructed based on the energy band matching within AgBr, LaNiO3 and g-C3N4. Metallic Ag during the photocatalytic reaction process acted as the active electrons transfer center to enhance the photocatalytic charge pairs separation. The chemical composition of ALG was optimized and composites with 3% AgBr, 30% LaNiO3 and 100% g-C3N4 which was noted as 3-ALG displayed the best photocatalytic performance. A total of 92% of norfloxacin (NOR) was photodegraded within two hours over ALG and the photodegradation rate remained >90% after six cycles. The main active species during the degradation course were photogenerated holes, superoxide radical anion and hydroxyl radical. A possible mechanism was proposed based on the synergetic effects within AgBr, LaNiO3 and g-C3N4. This work would offer a credible theoretical basis for the application of dual Z-scheme photocatalysts in environment restoration.

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“…For instance, the AgBr@g-C 3 N 4 /BiOBr ternary composite was fabricated through hydrothermal processing and an in situ ion-exchange route for dispersing AgBr nanoparticles between the g-C 3 N 4 /BiOBr (2D/2D) heterojunction. Interestingly, BiOBr played a central role between g-C 3 N 4 and AgBr for providing a high-speed charge transfer channel and isolating the photogenerated charge carriers, resulting in high photocatalytic efficiency for the degradation of rhodamine B (10 ppm, 94% in 30 min) and tetracycline hydrochloride (10 ppm, 78% in 2 h) [160]. The ternary heterojunction between Bi 24 O 31 Cl 10 , MoS 2 and g-C 3 N 4 was synthesized through the impregnation-calcination method.…”

Section: Integration Of Other Semiconductor Nanostructuresmentioning

confidence: 99%

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

et al. 2021

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Semiconductor-based photocatalysis has been identified as an encouraging approach for solving the two main challenging problems, viz., remedying our polluted environment and the generation of sustainable chemical energy. Stoichiometric and non-stoichiometric bismuth oxyhalides (BiOX and BixOyXz where X = Cl, Br, and I) are a relatively new class of semiconductors that have attracted considerable interest for photocatalysis applications due to attributes, viz., high stability, suitable band structure, modifiable energy bandgap and two-dimensional layered structure capable of generating an internal electric field. Recently, the construction of heterojunction photocatalysts, especially 2D/2D systems, has convincingly drawn momentous attention practicably owing to the productive influence of having two dissimilar layered semiconductors in face-to-face contact with each other. This review has systematically summarized the recent progress on the 2D/2D heterojunction constructed between BiOX/BixOyXz with graphitic carbon nitride (g-C3N4). The band structure of individual components, various fabrication methods, different strategies developed for improving the photocatalytic performance and their applications in the degradation of various organic contaminants, hydrogen (H2) evolution, carbon dioxide (CO2) reduction, nitrogen (N2) fixation and the organic synthesis of clean chemicals are summarized. The perspectives and plausible opportunities for developing high performance BiOX/BixOyXz-g-C3N4 heterojunction photocatalysts are also discussed.

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Constructing novel visible-light-driven ternary photocatalyst of AgBr nanoparticles decorated 2D/2D heterojunction of g-C3N4/BiOBr nanosheets with remarkably enhanced photocatalytic activity for water-treatment

Cited by 52 publications

References 62 publications

Dye Degradation, Antimicrobial Activity, and Molecular Docking Analysis of Samarium‐Grafted Carbon Nitride Doped‐Bismuth Oxobromide Quantum Dots

Dye Degradation, Antimicrobial Activity, and Molecular Docking Analysis of Samarium‐Grafted Carbon Nitride Doped‐Bismuth Oxobromide Quantum Dots

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

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