Visible light sensitive hexagonal boron nitride (hBN) decorated Fe2O3 photocatalyst for the degradation of methylene blue

Shenoy, Manjula R.; Sakunthala, A.; Vidhya, B.; Swaminathan, Rajesh; Raju, N. P.; Sasikumar, M.; Govindan, K.; Tamilarasan, Saravanakumar; Selvaraju, T.; J, Suryakanth; Reddy, M. V.

doi:10.1007/s10854-020-05215-4

Cited by 22 publications

(9 citation statements)

References 60 publications

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“…The most general approach is using h‐BN as support for growing oxide and metal nanoparticles. Some examples are (α‐Fe 2 O 3 ), [ 77 ] cadmium sulfide (CdS), [ 78 ] indium sulfide (In 2 S 3 ), [ 79 ] tin oxide (SnO 2 ), [ 80 ] tin sulfide (SnS 2 ), [ 81 ] zinc stannate (ZnSnO 3 ), [ 82 ] tungsten trioxide (WO 3 ), [ 83 ] antimony tungsten oxide (Sb 2 WO 6 ), [ 84 ] lead tungstate (PbWO 4 ), [ 85 ] zinc ferrite (ZnFe 2 O 4 ), [ 24 ] molybdenum oxide (MoO 2 ), [ 86 ] copper oxide (Cu 2 O), [ 87 ] copper sulfide (CuS), [ 88 ] silver bromide (AgBr), [ 89 ] and silver carbonate (Ag 2 CO 3 ). [ 90 ] These particles have grown on h‐BN with the main purpose to increase the charge transfer efficiency and reduce the recombination of hole–electron pairs.…”

Section: Boron Nitride–metal Compound Heterostructuresmentioning

confidence: 99%

2D Boron Nitride Heterostructures: Recent Advances and Future Challenges

Ren

Innocenzi

2021

Small Structures

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Hexagonal boron nitride (h‐BN) is one of the most attractive 2D materials because of its remarkable properties. Combining h‐BN with other components (e.g., graphene, carbonitride, semiconductors) to form heterostructures opens new perspectives to developing advanced functional devices. In this review, the state‐of‐the‐art in h‐BN heterojunctions is highlighted. The preparation of high‐quality 2D h‐BN structures with fewer defects can maximize its intrinsic properties, such as thermal conductivity and electrical insulation, which are particularly important in 2D van der Waals electronics. On the other hand, the controlled introduction in 2D h‐BN of multiple defects creates new properties and advanced functions. In this last case, only through a better understanding of the nature and function of defects, it is possible to develop advanced applications based on h‐BN heterostructures. Engineering of the heterojunctions, such as the design of bonding at the interfaces, also plays a primary role. Several applications are proposed for h‐BN heterostructures, mostly in sensing and photocatalysis, and some new perspectives worth further studies are opened. Finally, the current challenges and the rising opportunities for the future developments of next‐generation h‐BN heterostructures are discussed.

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Section: Boron Nitride–metal Compound Heterostructuresmentioning

confidence: 99%

2D Boron Nitride Heterostructures: Recent Advances and Future Challenges

Ren

Innocenzi

2021

Small Structures

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“…Furthermore, the band structure, Debye length (L DB ), density of charge carriers (N d ), and width of the space charge region (W sc ) pertaining to MBN-80 could also be calculated from the Mott-Schottky analysis through the following equations [28,31,32]. (8) (9) (10) (11) where C sc , e, A, ε, ε 0 , k B , and T indicate the capacitance of the space charge region, charge of an electron, active area of the electrode, dielectric constant, permittivity of free space, Boltzmann's constant, and absolute temperature, respectively.…”

Section: Electrochemical Analysismentioning

confidence: 99%

“…The variation in the structural morphology results in development of multiple active sites that ensure adsorption and effective charge transfer [10]. On the other hand, HBN has been utilised as a support material in the formation of heterojunctions owing to its large surface area and separation of charge carriers due to appropriate positioning of edge potentials with respect to the synergised photocatalyst [11][12][13]. The process of doping includes introduction of heteroatoms such as sulphur, oxygen, and carbon into the HBN lattice.…”

Section: Introductionmentioning

confidence: 99%

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

Mishra¹,

Saravanan²

2022

Beilstein J. Nanotechnol.

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The present study outlines the transformation of non-photoresponsive hexagonal boron nitride (HBN) into a visible-light-responsive material. The carbon modification was achieved through a solid-state reaction procedure inside a tube furnace under nitrogen atmosphere. In comparison to HBN (bandgap of 5.2 eV), the carbon-modified boron nitride could efficiently absorb LED light irradiation with a light harvesting efficiency of ≈90% and a direct bandgap of 2 eV. The introduction of carbon into the HBN lattice led to a significant change in the electronic environment through the formation of C–B and C–N bonds which resulted in improved visible light activity, lower charge transfer resistance, and improved charge carrier density (2.97 × 1019 cm−3). This subsequently enhanced the photocurrent density (three times) and decreased the photovoltage decay time (two times) in comparison to those of HBN. The electronic band structure (obtained through Mott–Schottky plots) and charge trapping analysis confirmed the dominance of e−, O2−•, and •OH as dominant reactive oxygen species. The carbon modification could effectively remove 93.83% of methylene blue (MB, 20 ppm solution) and 48.56% of phenol (10 ppm solution) from the aqueous phase in comparison to HBN which shows zero activity in the visible region.

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“…İkram et al [16] observed boron oxynitride bond in h-BN structure. Moreover, Shenoy et al [12] proved pure h-BN structure with an observation of B−N−B and B−N bonds in the h-BN structure via FTIR analysis. Similarly, Li and co-workers observed absorption peaks of the δ(B−N−B) and v(B−N) bonds in the h-BN whisker [8].…”

Section: Characterizationmentioning

confidence: 99%

“…Fu et al [11] prepared h-BN/TiO 2 samples for the photocatalytic removal of dye molecules and they observed that with the increasing of h-BN amount, degradation efficiencies were remarkably enhanced. Shenoy et al [12] prepared α-Fe 2 O 3 /h-BN composites and they reported that the photodegradation efficiencies towards Methylene Blue increased from 51% to 91% after the introduction of h-BN into the structure. The enhancement was ascribed to the electrostatic interaction between boron nitride and photo-generated holes and thus inhibited the recombination rate of charge pairs.…”

Section: Introductionmentioning

confidence: 99%

Exploring hexagonal boron nitride as an efficient visible light induced catalyst for the remediation of recalcitrant antibiotic from aqueous media

Balta

Şimşek

2022

Environmental Research and Technology

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In this study, novel non-metallic hexagonal boron nitride (h-BN) whiskers were fabricated by using polymeric precursor method and, the photocatalytic degradation performance was measured towards tetracycline antibiotic under visible-light-illumination. The morphological, physical, and optical features of the catalyst were identified by several characterization analyses. The characteristic peaks associated with hexagonal phase of boron nitride were determined and high crystallinity of h-BN was confirmed by XRD analysis. Typical boron and nitrogen bonding peaks were detected in FTIR spectrum. Brunauer−Emmet−Teller specific surface area of the boron nitride catalyst was calculated as 1019 m2/g which was relatively high, supplying abundant active regions to interact with the target pollutant. In photocatalytic degradation experiments, 91.9% of tetracycline decomposition was achieved within 180 min while the adsorptive removal was calculated as 20%. The outstanding catalytic activity of h-BN catalyst was attributed to the high surface area and negatively charged groups on the surface which captured the photo-induced holes and inhibited the recombination rate of charge carriers. These findings highlight the potential application of h-BN in the field of photocatalytic processes.

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Visible light sensitive hexagonal boron nitride (hBN) decorated Fe2O3 photocatalyst for the degradation of methylene blue

Cited by 22 publications

References 60 publications

2D Boron Nitride Heterostructures: Recent Advances and Future Challenges

2D Boron Nitride Heterostructures: Recent Advances and Future Challenges

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

Exploring hexagonal boron nitride as an efficient visible light induced catalyst for the remediation of recalcitrant antibiotic from aqueous media

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