Organic–inorganic hybrid photocatalyst consisting of a highly conjugated metal complex and graphitic carbon nitride for efficient hydrogen evolution and Cr(<scp>vi</scp>) reduction

Das, Bishal; Pala, Laxmi Prasad Rao; Mohanta, M K; Devi, Manisha; Chakraborty, Debarati; Peela, Nageswara Rao; Qureshi, Mohammad; Dhar, Siddhartha Sankar

doi:10.1039/d2ta05200h

Cited by 10 publications

(5 citation statements)

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“…Besides, the wide visible‐light‐responsive Ni 3 FeN results in an improvement in the visible‐light adsorption ability of g‐C 3 N 4 (Figure 5C). Compared with the original g‐C 3 N 4 , the absorption strength of Ni 3 FeN/g‐C 3 N 4 increases first and then decreases slightly with the increase of Ni 3 FeN loading, and the absorption strength of 5 wt% Ni 3 FeN/g‐C 3 N 4 is the highest, which may be caused by excessive aggregation 42,43 . The bandgap of photocatalyst is calculated by Tauc plots.…”

Section: Resultsmentioning

confidence: 99%

“…Compared with the original g-C 3 N 4 , the absorption strength of Ni 3 FeN/g-C 3 N 4 increases first and then decreases slightly with the increase of Ni 3 FeN loading, and the absorption strength of 5 wt% Ni 3 FeN/g-C 3 N 4 is the highest, which may be caused by excessive aggregation. 42,43 The bandgap of photocatalyst is calculated by Tauc plots. The bandgap energy of g-C 3 N 4 and Ni 3 FeN was determined by relationship plots of (αhν) 2 and hν (Figure 5B,C).…”

Section: Resultsmentioning

confidence: 99%

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Visible‐light‐driven Ni₃FeN/g‐C₃N₄ Z‐scheme heterostructure for remarkable photocatalytic water splitting

et al. 2023

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It is very essential to grow efficient and abundant photocatalysts for overall water cracking to produce hydrogen. Ni 3 FeN nanosheets were synthesized by combining simple sol-gel and calcining methods using urea as nitrogen source. A heterostructure was constructed between Ni 3 FeN and g-C 3 N 4 to enhance the absorption capacity of visible light. The reformed Z-scheme Ni 3 FeN/g-C 3 N 4 heterojunction exhibited an excellent visible-light photocatalytic activity. The average hydrogen evolution rate of 5 wt% Ni 3 FeN/g-C 3 N 4 composite is 528.7 μmol h −1 g −1 due to the Z-scheme Ni 3 FeN/g-C 3 N 4 junction, which promotes the separation of photogenerated e − /h + . Interestingly, the average H 2 production of Ni 3 FeN/g-C 3 N 4 is nearly 8.3 and 3.6 times higher than that of Fe 4 N/g-C 3 N 4 and Ni 4 N/g-C 3 N 4 , respectively, indicating that bimetallic nitrides as cocatalysts are more conducive to enhancing the performance of photocatalysts. Importantly, the Ni 3 FeN/g-C 3 N 4 composite exhibited good cycle stability, and the hydrogen production performance hardly changed after four cycle experiments. Furthermore, photoluminescence, electrochemical impedance spectroscopy, and transient photocurrent response show that Ni 3 FeN/g-C 3 N 4 heterojunction improves the separation efficiency of photoinduced e − /h + . This work provides a feasibility of the cocatalyst Ni 3 FeN for use in photocatalytic hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Visible‐light‐driven Ni₃FeN/g‐C₃N₄ Z‐scheme heterostructure for remarkable photocatalytic water splitting

et al. 2023

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“…Also, under dark conditions, there was essentially no Cr(VI) adsorption even after the addition of the catalyst, suggesting that light is a necessary component of the Cr(VI) reduction reaction using Sr-doped HAp/NiO catalyst. 49 At the end, under the optimum reaction conditions, a colorless solution of Cr(III) was obtained. The color changes of the solutions are shown in Fig.…”

Section: Photocatalytic Cr(vi) Reductionmentioning

confidence: 98%

Development of a hydroxyapatite-based composite: Sr-doped HAp/NiO proven to be an efficient nanocatalyst for photocatalytic degradation of organic dye and photoreduction of Cr(vi)

Bharali,

Sahu,

Kalita

et al. 2024

New J. Chem.

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“…[42] In addition, the conduction band positions of CeO 2 -NP and nano-CeO 2 -IL are farther negative than 0.36 V which was necessary for the reduction of Cr (VI) to Cr (III). [43]…”

Section: Plausible Reaction Mechanismmentioning

confidence: 99%

Organic Ionic Liquid Grafted Nano‐CeO₂: A Highly Efficient Photocatalyst for Hydroxylation of Benzene and Reduction of Cr (VI)

Chakraborty,

Kalita,

Bharali

et al. 2023

ChemistrySelect

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An ionic liquid, namely imidazolium sulfonic acid chloride (ISAC) has been electrostatically grafted over cerium oxide nanoparticles to produce a nanocomposite, nano‐CeO2‐IL. The as‐prepared composite was characterized by various analytical techniques such as XRD, FT‐IR, SEM, TEM, XPS, BET, UV‐DRS, PL, and TGA to confirm the grafting of ISAC over CeO2 NPs. The photocatalytic process is regarded as the method of choice for the elimination of air pollutants because of its great efficiency and relatively benign working conditions. According to UV‐DRS spectra, its optical gap is 2.07 eV, which is appropriate for the visible light spectrum. The composite was investigated as a visible‐light‐driven photocatalyst for hydroxylation of benzene to phenol and heavy metal Cr (VI) reduction. Moreover, the scavenger experiments confirmed the detection of ⋅OH radicals which played a crucial role in the photocatalytic experiments. Within 60 minutes, 98.5 % of benzene was converted to phenol with 82.7 % selectivity in addition to 93.63 % Cr (VI) reduction within 30 mins. The photocatalytic reduction of Cr(VI) to Cr(III) follows a first‐order model with a rate constant of 0.027 min−1. The remarkably high photocatalytic performance of the catalyst may be ascribed to the synergistic interaction between the nano‐CeO2 catalyst and ionic liquid.

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Organic–inorganic hybrid photocatalyst consisting of a highly conjugated metal complex and graphitic carbon nitride for efficient hydrogen evolution and Cr(vi) reduction

Abstract: Copper tetraphenylporphyrin tetrasulfonic acid (Cu-Por) metal complex has been anchored over graphitic carbon nitrides (GCN) sheets by electrostatic interaction. The incorporation of photosensitizer through π-π interactions has greatly enhanced the...

Cited by 10 publications

References 58 publications

Visible‐light‐driven Ni₃FeN/g‐C₃N₄ Z‐scheme heterostructure for remarkable photocatalytic water splitting

Visible‐light‐driven Ni₃FeN/g‐C₃N₄ Z‐scheme heterostructure for remarkable photocatalytic water splitting

Development of a hydroxyapatite-based composite: Sr-doped HAp/NiO proven to be an efficient nanocatalyst for photocatalytic degradation of organic dye and photoreduction of Cr(vi)

Organic Ionic Liquid Grafted Nano‐CeO₂: A Highly Efficient Photocatalyst for Hydroxylation of Benzene and Reduction of Cr (VI)

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Organic–inorganic hybrid photocatalyst consisting of a highly conjugated metal complex and graphitic carbon nitride for efficient hydrogen evolution and Cr(vi) reduction

Abstract: Copper tetraphenylporphyrin tetrasulfonic acid (Cu-Por) metal complex has been anchored over graphitic carbon nitrides (GCN) sheets by electrostatic interaction. The incorporation of photosensitizer through π-π interactions has greatly enhanced the...

Cited by 10 publications

References 58 publications

Visible‐light‐driven Ni3FeN/g‐C3N4 Z‐scheme heterostructure for remarkable photocatalytic water splitting

Visible‐light‐driven Ni3FeN/g‐C3N4 Z‐scheme heterostructure for remarkable photocatalytic water splitting

Development of a hydroxyapatite-based composite: Sr-doped HAp/NiO proven to be an efficient nanocatalyst for photocatalytic degradation of organic dye and photoreduction of Cr(vi)

Organic Ionic Liquid Grafted Nano‐CeO2: A Highly Efficient Photocatalyst for Hydroxylation of Benzene and Reduction of Cr (VI)

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Visible‐light‐driven Ni₃FeN/g‐C₃N₄ Z‐scheme heterostructure for remarkable photocatalytic water splitting

Visible‐light‐driven Ni₃FeN/g‐C₃N₄ Z‐scheme heterostructure for remarkable photocatalytic water splitting

Organic Ionic Liquid Grafted Nano‐CeO₂: A Highly Efficient Photocatalyst for Hydroxylation of Benzene and Reduction of Cr (VI)