Construction of 1D/2D BN/TiO2 nanostructures for efficient photocatalytic degradation of dyes

Ni, Guolong; Li, Yanhua; Wang, Shuhuan; Li, Qun

doi:10.1016/j.matlet.2021.129385

Cited by 16 publications

(2 citation statements)

References 13 publications

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“…These h‐BN heterostructures are mainly realized using TiO 2 particles in micro‐ or nano scale. [ 22,33,41–43 ] However, the recent classification of the European Union has listed titania powders as a category 2 carcinogen by inhalation, severely limiting the applications of titania particles. A possible alternative is synthesizing and using titania in the form of thin films.…”

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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“…Then, the product was dried at 70 °C overnight to obtain a white powder. After grinding, the powder was calcined at 500 °C for 2 h. The obtained sample was named X wt % h-BN/TiO 2 , where X refers to the mass fraction of h-BN in the synthetic process. , …”

Section: Methodsmentioning

confidence: 99%

Degradation of Organic Dyes by the UCNP/h-BN/TiO₂ Ternary Photocatalyst

Xie,

Zhang,

et al. 2023

ACS Omega

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In this study, upconversion nanoparticles (UCNPs) with a flower-like morphology were prepared using a urea coprecipitation method. A ternary photocatalyst was first prepared using a solvothermal method involving the use of titanium oxide (TiO 2 ), hexagonal boron nitride (h-BN), and UCNPs (Y 2 O 3 , Yb 3+ , and Tm 3+ ) as raw materials. The surface morphology, crystal structure, and functional groups of these materials were then characterized and analyzed through scanning electron microscopy, transmission electron microscopy, X-ray diffraction analysis, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, ultraviolet–visible spectrophotometry, and other techniques. Photocatalytic experiments were also conducted to investigate the effects of different catalyst types, raw material doping ratios, pH values, and catalyst quantities on the photocatalytic degradation of rhodamine B (RhB). The results indicated that doping with h-BN and UCNPs reduced the band gap width of RhB, increased its light absorption rate, and decreased the recombination rate of its photogenerated electrons and holes so that the photocatalytic degradation effect reached 100% within 2 h. After five experimental cycles, the 30% UC-BN-Ti photocatalyst remained highly durable and stable. To investigate the effects of different trapping agents on the degradation of RhB, benzoquinone, isopropanol, and ethylenediaminetetraacetic acid disodium salt were used as free-radical-capturing agents. The results indicated that • O 2– was the primary active species in the degradation process. Finally, the pathway and mechanism of the degradation of RhB through ternary composite photocatalysis were identified.

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