Facile preparation of PbCrO4 and PbCrO4/Ag nanostructure as an effective photocatalyst for degradation of organic contaminants

Abbasi, Ali; Hamadanian, Masood; Gholami, Tahere; Salavati‐Niasari, Masoud; Sadri, Nazanin

doi:10.1016/j.seppur.2018.07.018

Cited by 17 publications

(3 citation statements)

References 41 publications

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“…When extrapolating to x = 0 from a plot of (α h ν) 2 versus photon energy ( h ν), the estimated band gap energies are 1.68, 2.64, 1.78, 1.91, and 1.98 eV for Co 3 O 4 , Bi 4 O 5 I 2 /Bi 5 O 7 I, CB1, CB2, and CB5, respectively. The band gap of Co 3 O 4 is similar to what is already reported in the literature . There was an observed decrease in the band gap energies of the nanocomposites compared to Bi 4 O 5 I 2 /Bi 5 O 7 I upon addition of Co 3 O 4 that increased directly with an increasing amount of Co 3 O 4 from CB1 to CB5 .…”

Section: Results and Discussionsupporting

confidence: 86%

Co₃O₄/Bi₄O₅I₂/Bi₅O₇I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

Malefane

2020

ACS Omega

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Remediation of organic pollutant matrixes from wastewater by photodegradation using different heterojunctions is extensively studied to improve performance for potential application. Brilliant black (BB) and p -nitrophenol (PNP) have been detected in the environment and implicated as directly or indirectly carcinogenic to human health. This work analyzes their elimination from aqueous solutions under visible-light irradiation with composites of cobalt(II, III) oxide and bismuth oxyiodides (Co 3 O 4 /Bi 4 O 5 I 2 /Bi 5 O 7 I). The synthesized nanomaterial properties were investigated using various techniques such as BET, SEM/EDS, TEM, XRD, FTIR, PL, and UV–vis. All the nanocomposites absorbed in the visible range of the solar spectrum with band gaps between 1.68 and 2.79 eV, and the specific surface area of the CB2 composite increased by 35.8% from that of Bi 4 O 5 I 2 /Bi 5 O 7 I. There was an observed massive reduction in the rate of electron and hole recombination, and the band gaps of the composites decreased. The mineralization of PNP and BB was followed by determination of the total organic carbon with reductions of 93.6 and 83.7%, respectively. The main active species were the hydroxyl radicals, while the superoxide anion radical and generated holes were minor as confirmed by radical trapping experiments. The optimum pHs for degradation of PNP and BB were 9.6 and 5.3, respectively. The enhanced performance of the catalyst was due to C-scheme heterojunction formation that reduced the electron and hole recombination rate and was attributed to strong adsorption of the pollutants on the photocatalyst active surface. The nanocomposite is apposite for solar energy-driven remediation of organic pollutants from environmental aqueous samples.

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Section: Results and Discussionsupporting

confidence: 86%

Co₃O₄/Bi₄O₅I₂/Bi₅O₇I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

Malefane

2020

ACS Omega

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“…The chelating factor TEPA the greatest steric barrier impact is found in it use in synthesis approach, prevents the produced nanoparticles from aggregating, serving as both an alkaline agent and a capping agent. When TEPA was used, remarkably homogeneous, spherical, fine-grained lead chromate nanoparticles were produced confirmed from figure 2(b) [57]. In the case of the MXene/PbCrO 4 nanocomposite, figure 2(c) depicts a non-homogeneous arrangement of lead chromate particles over MXene surface [50].…”

Section: Morphological (Sem) and Elemental Analysis (Eds)mentioning

confidence: 73%

“…As the temperature rises gel-like fluid evaporates, a porous solid form mass is created. The powders were now calcinated for nearly three hours at 700 °C [57].…”

Section: Pbcro 4 Nanoparticles Based Synthesismentioning

confidence: 99%

Lead integrated two-dimensional (MXene/PbCrO₄) nanocomposite designed for energy storage and photocatalytic degradation applications

Akram,

Rani,

Batool

et al. 2023

Phys. Scr.

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Supercapacitors (SCs), among other electrochemical device applications, require materials with maximal energy storage capacity, and the stacked two-dimensional titanium carbide MXene (Ti3C2) sparked the development of these materials. This paper embellished to present smoothed MXene/PbCrO4 nanocomposite via co-precipitation method along with modified sol–gel achieved lead chromate (PbCrO4) nano-crystalline for energy storage and photocatalytic applications using ethylene glycol as connecting agent to restrict nano-particle growth. It is evident from photoluminescence spectra that peak intensity has decreased, whilst Raman spectra show the presence of MXene and lead peaks in the nanocomposite, whereas FTIR has revealed the presence of functional groups in synthesized material. According to calculations made using EIS spectra, the charge transfer resistance is 1.4 Ω, with the electron shift rate constant Kapp value 6.98 10−9 cm s−1. Additionally, the electrochemical performance of the designed material in supercapacitors at 0.3Ag−1 of current density indicates elevated capacitance of 5408 Fg−1 with scan rate of 10 mV s−1 using 1MKOH aqueous electrolyte, resulting in power and energy densities of 2991.8 W kg−1 and 110.1 Wh K−1 g−1, respectively. UV–vis spectra shows the nanocomposite has a 1.86 eV band gap that, in the presence of direct sunlight, might cause the destruction of MB dye at a rate of 92.79%. These findings suggested that the newly created MXene/PbCrO4 nanocomposite demonstrates evidence of substantial features as compared to single materials has potential as an electrode material for supercapacitors as well as best photocatalyst for the degradation of organic pollutants regarding water purification.

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Green and cost-effective photocatalytic degradation of murexide dye with acid catalyst

Abidin,

Majeed,

Iqbal

et al. 2024

Clean Techn Environ Policy

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Facile preparation of PbCrO4 and PbCrO4/Ag nanostructure as an effective photocatalyst for degradation of organic contaminants

Cited by 17 publications

References 41 publications

Co₃O₄/Bi₄O₅I₂/Bi₅O₇I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

Co₃O₄/Bi₄O₅I₂/Bi₅O₇I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

Lead integrated two-dimensional (MXene/PbCrO₄) nanocomposite designed for energy storage and photocatalytic degradation applications

Green and cost-effective photocatalytic degradation of murexide dye with acid catalyst

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Facile preparation of PbCrO4 and PbCrO4/Ag nanostructure as an effective photocatalyst for degradation of organic contaminants

Cited by 17 publications

References 41 publications

Co3O4/Bi4O5I2/Bi5O7I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

Co3O4/Bi4O5I2/Bi5O7I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

Lead integrated two-dimensional (MXene/PbCrO4) nanocomposite designed for energy storage and photocatalytic degradation applications

Green and cost-effective photocatalytic degradation of murexide dye with acid catalyst

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Product

Resources

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Co₃O₄/Bi₄O₅I₂/Bi₅O₇I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

Co₃O₄/Bi₄O₅I₂/Bi₅O₇I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation

Lead integrated two-dimensional (MXene/PbCrO₄) nanocomposite designed for energy storage and photocatalytic degradation applications