Influence of different bismuth oxyhalides on the photocatalytic activity of graphitic carbon nitride: a comparative study under natural sunlight

Singh, Mahender; Kumar, Ajay; Krishnan, Venkata

doi:10.1039/d0ma00294a

Cited by 50 publications

(18 citation statements)

References 59 publications

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“…PL spectrum signifies the recombination rate of charge carriers i.e electron and holes. The lower the PL intensity, the lower the recombination rate and thus higher lifetime for the charge carriers for photodegradation . GCN and Na−S−GCN shows a blue‐violet emission at 436 nm and 448 nm respectively.…”

Section: Resultsmentioning

confidence: 99%

Sodium and Sulfur Co‐Doped Graphitic Carbon Nitride: A Novel and Effective Visible Light Driven Photocatalyst with Tunable Bandgap for Degradation of Eosin Yellow

et al. 2020

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A novel Na and S co-doped g-C 3 N 4 (NaÀ SÀ GCN) hybrid was synthesized by facile and inexpensive calcination of melamine and Na 2 S. The synthesized catalysts were systematically characterized with XRD, FT-IR, SEM, HR-TEM, XPS, PL and UV-DRS. The successful doping of Na and S in the g-C 3 N 4 layers was confirmed with XPS and FT-IR analysis. UV-DRS spectra and band gap calculation revealed higher visible light absorption and lower band gap of NaÀ SÀ GCN (2.64 eV) than that of GCN (2.83 eV). The photochemical efficiency of NaÀ SÀ GCN was examined using eosin yellow (EY) which afforded 90 % degradation in 140 minutes under visible light. A 7.4 times higher degradation of EY was found with NaÀ SÀ GCN than that with bulk GCN. The higher catalytic activity was attributed to enhanced visible light absorption and effective lowering of recombination of reactive photogenerated species. The involvement of * OH and O 2 * À in the degradation process was confirmed with radical trapping experiments.

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Section: Resultsmentioning

confidence: 99%

Sodium and Sulfur Co‐Doped Graphitic Carbon Nitride: A Novel and Effective Visible Light Driven Photocatalyst with Tunable Bandgap for Degradation of Eosin Yellow

et al. 2020

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“…The preference for HPPs is due mainly to their important, characteristic features which include: (i) ambient operating conditions, such as temperature and pressure (ii) potential mineralization of parent and transformation products without secondary pollution and (iii) economic feasibility and efficiency [44]. A broad class of semiconductor nanomaterials have been explored for HPP processes and could be broadly classified as metals, sulfides [45,46], oxides [47,48], nitrides [49,50], oxysulfides [51], oxyhalides [52,53] and oxynitrides [54,55]. The activity of semiconductors in light-induced redox process sensitization arise from the electronic structure of the metal atoms in chemical compounds.…”

Section: Therapeutic Classmentioning

confidence: 99%

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Olatunde

Onwudiwe

2021

IJERPH

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The incessant release of pharmaceuticals into the aquatic environment continues to be a subject of increasing concern. This is because of the growing demand for potable water sources and the potential health hazards which these pollutants pose to aquatic animals and humans. The inability of conventional water treatment systems to remove these compounds creates the need for new treatment systems in order to deal with these class of compounds. This review focuses on advanced oxidation processes that employ graphene-based composites as catalysts for the degradation of pharmaceuticals. These composites have been identified to possess enhanced catalytic activity due to increased surface area and reduced charge carrier recombination. The techniques employed in synthesizing these composites have been explored and five different advanced oxidation processes—direct degradation process, chemical oxidation process, photocatalysis, electrocatalyis processes and sonocatalytic/sono-photocatalytic processes—have been studied in terms of their enhanced catalytic activity. Finally, a comparative analysis of the processes that employ graphene-based composites was done in terms of process efficiency, reaction rate, mineralization efficiency and time required to achieve 90% degradation.

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“…), metal-organic frameworks (MOFs), perovskite oxides, and so on. [4][5][6][7][8][9][10][11][12][13][14] The energy band alignments of some commonly applied semiconductor photocatalysts are shown in Figure 1. Although the enhanced photocatalytic CO 2 RR applications have been evidenced, these materials are still suffering from some intrinsic drawbacks, such as poor stability, limited optical response, weak reaction activity, and high cost; additionally, most materials can only absorb UV light and have low selectivity for products.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Inorganic Halide Perovskite Photocatalysts toward Carbon Dioxide Reduction

Zhang

Tang

et al. 2022

Solar RRL

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In recent years, photocatalytic carbon dioxide reduction has emerged as an attractive strategy to settle the global warming and energy crisis by converting CO2 into valuable chemicals utilizing solar energy. All‐inorganic halide perovskites (PVKs), as a class of promising light‐harvesting materials with outstanding optoelectronic properties and considerable stabilities, have received dramatic attention in the field of photocatalytic CO2 reduction reaction (CO2RR). In this review, the recent progress of PVK catalysts for CO2RR is systematically summarized and evaluated according to the modification strategies and their mechanisms. The working principles of CO2RR are first introduced. The main strategies for improving the photoelectrochemical performance are then discussed and their recent developments are summarized. Finally, the current challenges, including instability, charge recombination, and insufficient active sites, and future research opportunities for further development are addressed.

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Influence of different bismuth oxyhalides on the photocatalytic activity of graphitic carbon nitride: a comparative study under natural sunlight

Abstract: The BiOX/g-C3N4 composites showed enhanced photocatalytic performance towards organic pollutant degradation owing to the boosted charge transfer over the binary interfaces.

Cited by 50 publications

References 59 publications

Sodium and Sulfur Co‐Doped Graphitic Carbon Nitride: A Novel and Effective Visible Light Driven Photocatalyst with Tunable Bandgap for Degradation of Eosin Yellow

Sodium and Sulfur Co‐Doped Graphitic Carbon Nitride: A Novel and Effective Visible Light Driven Photocatalyst with Tunable Bandgap for Degradation of Eosin Yellow

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Tailoring Inorganic Halide Perovskite Photocatalysts toward Carbon Dioxide Reduction

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