LaNiO3/g-C3N4 nanocomposite: An efficient Z-scheme photocatalyst for wastewater treatment using direct sunlight

Ghorai, Kalyan; Panda, Atanu; Hossain, Akbar; Bhattacharjee, Monotosh; Chakraborty, Malay; Bhattacharya, Swapan Kumar; Show, Bibhutibhushan; Sarkar, Abhimanyu; Bera, Parthasarathi; Kim, Han-Sang; Seikh, Md. Motin; Gayen, Arup

doi:10.1016/j.jre.2021.04.013

Cited by 31 publications

(14 citation statements)

References 51 publications

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“…Moreover, the Z-scheme charge transfer systems can enhance UV–visible light absorption and promote the separation and easy transportation of photogenerated charge carriers due to direct contact at the interfaces. Heterostructures between g-CN and other semiconductors with matching band edge positions, such as LaNiO 3 /g-CN, MnFe 2 O 4 /g-CN, MoS 2 /g-CN, CeO 2 /g-CN, , and others, have shown enhanced photocatalytic performance on organic MB and MO dye degradation . Density functional theory (DFT) calculations confirm the favorable photocatalytic potential of g-CN-based Z-scheme heterostructures, providing valuable insights into their electronic interactions and photophysical properties. , …”

Section: Introductionmentioning

confidence: 95%

“…Similarly, another pollutant named methylene orange (MO), an anionic dye, is well known for its versatile use in the textile, pharmaceutical, and food industries. On the contrary, these dyes found in water streams (leaked from industries) pose a threat to human health and the environment because of their toxicity, carcinogenic, and nonbiodegradable nature. − …”

Section: Introductionmentioning

confidence: 99%

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CeMnO₃ Nanoparticle-Decorated g-C₃N₄ Nanosheets as Z-Scheme Heterostructures for Efficient Photocatalytic Degradation of Dyes

Munisha,

Patra,

Nanda

et al. 2023

ACS Appl. Nano Mater.

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The design of efficient photocatalysts for dye degradation is a challenging task for the scientific community. Semiconductor-based photocatalysts such as g-C3N4 and oxides, utilizing solar energy, have been proven to be effective and promising approaches to resolve this issue to some extent. Constructing Z-scheme heterostructures by coupling g-C3N4 with suitable oxide semiconductors has shown substantial enhancement of the photocatalytic performance. In this article, perovskite-type CeMnO3 (5, 15, 25%) nanoparticle-decorated g-C3N4 nanosheets are fabricated as heterostructures, using a hydrothermal synthesis process, for efficient photocatalysis of organic dyes. The formations of heterostructures are confirmed through structural, microstructural, and elemental state analysis. Brunauer–Emmett–Teller (BET) and Barrett–Joyner–Halenda (BJH) characterization techniques exhibited enhanced surface area and pore sizes, respectively. Ultraviolet–visible (UV–vis) diffuse reflectance spectroscopy (DRS), Mott–Schottky, and linear sweep voltammetry (LSV) analyses along with density functional theory (DFT) calculations predicted a p–n junction heterostructure. Electron paramagnetic resonance (EPR) studies revealed a broad spectrum with sextet hyperfine lines corresponding to Mn4+ and Mn2+ ions and enhanced intensity as compared to the parent ones, signifying the creation of oxygen vacancies in the heterostructure. The CeMnO3 (25 wt %)/g-C3N4 heterostructure showed highly efficient photocatalytic degradation of methylene blue under direct sunlight irradiation, with up to 99% degradation achieved in 120 min and excellent recyclability. The robustness of this photocatalyst was tested by adopting a similar process for methylene orange dye degradation, exhibiting 94% yield in 120 min. A tentative degradation mechanism is proposed based on the enhanced photodegradation efficiency and results obtained from electrochemical impedance (EIS), photoluminescence (PL), LSV, and first principal studies, which provides more insights into the photogenerated charge separation, enhanced photocurrent, and interfacial transfer efficiency through the Z-scheme charge transfer process. This study offers opportunities for designing high-performance Z-scheme hybrid photocatalysts for environmental remediation.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

CeMnO₃ Nanoparticle-Decorated g-C₃N₄ Nanosheets as Z-Scheme Heterostructures for Efficient Photocatalytic Degradation of Dyes

Munisha,

Patra,

Nanda

et al. 2023

ACS Appl. Nano Mater.

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“…Ni-doped LaFeO 3 was ubiquitously employed as a photo/thermal catalyst or a catalyst precursor for VOCs combustion [32], hydrogen production from ethanol [33], hydrocarbon fuels production from CO 2 and H 2 O [34], syngas production from dry reforming [35], steam reforming of methane [36], or combined reforming of methane with CO 2 and O 2 [37]. Meanwhile, LaNiO 3 photocatalysts also played an essential role in photocatalytic reactions for wastewater [38]. Fe doping of LaNiO 3 revealed the potential of tuning bandgap and boosting the light absorption to degrade RhB [39].…”

Section: Introductionmentioning

confidence: 99%

“…However, little literature comprehensively and systematically discusses the effect of different doping ratios on photocatalytic reactions. Moreover, LaNiO 3 revealed broad absorption in the visible light range [38], so the Ni doping was expected to improve the visible light harvesting of LaFeO 3 . Accordingly, little literature explored the effect of Ni substitution to LaFeO 3 on the performance of photocatalytic Fenton-like reaction to degrade dye pollutants in water.…”

Section: Introductionmentioning

confidence: 99%

Solar-light-driven LaFe_xNi₁₋_xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

Huang¹,

Hsu²,

Lin³

et al. 2022

Beilstein J. Nanotechnol.

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LaFexNi1−xO3 perovskite oxides were prepared by the sol–gel method under various conditions, including different pH values (pH 0 and pH 7) and different calcination temperatures (500–800 °C) as well as different Fe/Ni ratios (1/9, 3/7, 5/5, 7/3, 9/1). The samples were examined by XRD, DRS, BET, and SEM to reveal their crystallinity, light-absorption ability, specific surface area, and surface features, respectively. The photocatalytic Fenton reaction was conducted using various LaFexNi1−xO3 perovskite oxides to decompose the methylene blue molecules. Accordingly, the synthesis condition of pH 0, calcination temperature at 700 °C, and Fe/Ni ratio = 7/3 could form LaFe0.7Ni0.3O3 perovskite oxides as highly efficient photocatalysts. Moreover, various conditions during the photocatalytic degradation were verified, such as pH value, catalyst dosage, and the additional amount of H2O2. LaFe0.7Ni0.3O3 perovskite oxides could operate efficiently under pH 3.5, catalyst dosage of 50 mg/150 mL, and H2O2 concentration of 133 ppm to decompose the MB dye in the 1st order kinetic rate constant of 0.0506 s−1.

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“…In this present study, we investigated on Nd 3+ ion-doped WCN composite for the degradation of Methylene Blue (MB) and explored possibility of using UV/visible emission properties to expand the structural responds range for the utilization of near-infrared (NIR) photons for photocatalysis. However, there are many reports on GCN doped by rare-earth elements. − Our aim is to study doping of Nd 3+ into WO lattice and finally coupling of NdWO 3 (NWO) with GCN to form a NdWO 3 /g-C 3 N 4 (NWCN) ternary composite to explore structural, optical, electronic properties, photoelectrochemical measurements, and photocatalytic activity. To the best of our knowledge, we present, for the first time, a novel approach to the type II NWCN n – n heterojunction under visible-light irradiation for photocatalytic activity by degradation of MB.…”

Section: Introductionmentioning

confidence: 99%

Type II NdWO₃/g-C₃N₄n–n Heterojunction for Visible-Light-Driven Photocatalyst: Exploration of Charge Transfer in Nd³⁺ Ion-Doped WO₃/g-C₃N₄ Composite

Kalidasan

Mallapur

Vishwa

et al. 2022

Ind. Eng. Chem. Res.

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A novel NdWO3/g-C3N4 n–n heterojunction was prepared via a calcination method. The synergistic interaction between the NdWO3 and g-C3N4 catalysts has been investigated and characterized by using various analytical techniques. The band gaps and conduction band positions of NdWO3 and g-C3N4 samples were identified from ultraviolet–visible light (UV-Vis) absorption spectroscopy and Mott–Schottky results. The extended absorption in the visible region is due to the overlying of energy level bands between NdWO3 and g-C3N4 catalysts. The ternary NdWO3/g-C3N4 composite exhibited enhanced photocatalytic activity is due to the adequate utilization of light on the assembly of the n–n heterojunction and tight contact facilitates the interfacial charge transfer between NdWO3 to g-C3N4. The formation of the n–n heterojunction is confirmed from the open circuit potential measurements. The proposed mechanism for the enriched visible-light photocatalytic activity of the NdWO3/g-C3N4 n–n heterojunction was further supported and endorsed by photoluminescence, electrical impedance spectroscopy, and transient photocurrent response. Furthermore, the addition of hydrogen peroxide as an oxidant to the reaction system and flat band potentials was correlated with photocatalytic activity. Degradation product analysis was done using Liquid Chromatography Mass Spectroscopy techniques combined with UV–visible absorption spectrum. The results showed that the MB dye degradation is initiated by the removal of methyl groups in the molecule.

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LaNiO3/g-C3N4 nanocomposite: An efficient Z-scheme photocatalyst for wastewater treatment using direct sunlight

Cited by 31 publications

References 51 publications

CeMnO₃ Nanoparticle-Decorated g-C₃N₄ Nanosheets as Z-Scheme Heterostructures for Efficient Photocatalytic Degradation of Dyes

CeMnO₃ Nanoparticle-Decorated g-C₃N₄ Nanosheets as Z-Scheme Heterostructures for Efficient Photocatalytic Degradation of Dyes

Solar-light-driven LaFe_xNi₁₋_xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

Type II NdWO₃/g-C₃N₄n–n Heterojunction for Visible-Light-Driven Photocatalyst: Exploration of Charge Transfer in Nd³⁺ Ion-Doped WO₃/g-C₃N₄ Composite

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LaNiO3/g-C3N4 nanocomposite: An efficient Z-scheme photocatalyst for wastewater treatment using direct sunlight

Cited by 31 publications

References 51 publications

CeMnO3 Nanoparticle-Decorated g-C3N4 Nanosheets as Z-Scheme Heterostructures for Efficient Photocatalytic Degradation of Dyes

CeMnO3 Nanoparticle-Decorated g-C3N4 Nanosheets as Z-Scheme Heterostructures for Efficient Photocatalytic Degradation of Dyes

Solar-light-driven LaFexNi1−xO3 perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

Type II NdWO3/g-C3N4n–n Heterojunction for Visible-Light-Driven Photocatalyst: Exploration of Charge Transfer in Nd3+ Ion-Doped WO3/g-C3N4 Composite

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CeMnO₃ Nanoparticle-Decorated g-C₃N₄ Nanosheets as Z-Scheme Heterostructures for Efficient Photocatalytic Degradation of Dyes

CeMnO₃ Nanoparticle-Decorated g-C₃N₄ Nanosheets as Z-Scheme Heterostructures for Efficient Photocatalytic Degradation of Dyes

Solar-light-driven LaFe_xNi₁₋_xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

Type II NdWO₃/g-C₃N₄n–n Heterojunction for Visible-Light-Driven Photocatalyst: Exploration of Charge Transfer in Nd³⁺ Ion-Doped WO₃/g-C₃N₄ Composite