Unveiling the impact of interfacially engineered selective V2O5 nanobelt bundles with flake-like ZnO and Co–ZnO thin films for multifunctional visible-light water splitting and toxic gas sensing

Sreedhar, Adem; Reddy, I. Neelakanta; Ta, Qui Thanh Hoai; Doan, Thanh Hoang Phuong; Shim, Jaesool; Noh, Jin−Seo

doi:10.1016/j.jpowsour.2020.229081

Cited by 14 publications

(4 citation statements)

References 41 publications

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“…Zinc oxide ZnO, an excellent photocatalyst, is restricted from functional application due to its wide band gap (3.3. eV), fast recombination rate, and photocorrosion. , Another important oxide semiconductor material, vanadium oxide (V 2 O 5 ), with a band gap of ∼2.4 eV has also been explored for many photocatalytic applications; however, its performance is tormented by easy dissolution in aqueous solution and causes secondary pollution. , Coupling of ZnO and V 2 O 5 has been found to show synergistic benefits due to stabilization of V 2 O 5 , and the less negative CB of ZnO can accept electrons from V 2 O 5 , leading better charge separation. − Unfortunately, interfacial recombination, charge carrier energy loss in a type-I heterojunction due to opposite migration, and limited hole mobility are still challenging issues. Using mixed metal oxides such as binary metal vanadates is more appealing to amalgamate the properties of two catalytic components to reach a narrow band gap, resilient chemical nature, better charge mobilities, etc. − …”

Section: Carbon Nitride–metal Oxide 2d/2d Vdw Structuresmentioning

confidence: 99%

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

et al. 2021

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The surging demand for energy and staggering pollutants in the environment have geared the scientific community to explore sustainable pathways that are economically feasible and environmentally compelling. In this context, harnessing solar energy using semiconductor materials to generate charge pairs to drive photoredox reactions has been envisioned as a futuristic approach. Numerous inorganic crystals with promising nanoregime properties investigated in the past decade have yet to demonstrate practical application due to limited photon absorption and sluggish charge separation kinetics. Two-dimensional semiconductors with tunable optical and electronic properties and quasi-resistance-free lateral charge transfer mechanisms have shown great promise in photocatalysis. Polymeric graphitic carbon nitride (g-C3N4) is among the most promising candidates due to fine-tuned band edges and the feasibility of optimizing the optical properties via materials genomics. Constructing a two-dimensional (2D)/2D van der Waals (vdW) heterojunction by allies of 2D carbon nitride sheets and other 2D semiconductors has demonstrated enhanced charge separation with improved visible photon absorption, and the performance is not restricted by the lattice matching of constituting materials. With the advent of new 2D semiconductors over the recent past, the 2D/2D heterojunction assemblies are gaining momentum to design high performance photocatalysts for numerous applications. This review aims to highlight recent advancements and key understanding in carbon nitride based 2D/2D heterojunctions and their applications in photocatalysis, including small molecules activation, conversion, and degradations. We conclude with a forward-looking perspective discussing the key challenges and opportunity areas for future research.

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Section: Carbon Nitride–metal Oxide 2d/2d Vdw Structuresmentioning

confidence: 99%

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

et al. 2021

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“…Such materials are not yet known very much, but the number of works in this area is rapidly increasing. Among the recent works, we can distinguish the studies of the visible light activated gas sensitivity of V 2 O 5 [ 117 , 118 ] ( E g = 2.2–2.4 eV) and p -type semiconductor oxides, such as HoFeO 3 [ 119 ] and NiO [ 120 ]. Another way is to sensitize wide-gap semiconductor oxides to the visible radiation.…”

Section: Activation Of Gas Sensitivity Of Semiconductor Metal Oxides Under Visible Lightmentioning

confidence: 99%

Light Activation of Nanocrystalline Metal Oxides for Gas Sensing: Principles, Achievements, Challenges

2021

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The review deals with issues related to the principle of operation of resistive semiconductor gas sensors and the use of light activation instead of thermal heating when detecting gases. Information on the photoelectric and optical properties of nanocrystalline oxides SnO2, ZnO, In2O3, and WO3, which are the most widely used sensitive materials for semiconductor gas sensors, is presented. The activation of the gas sensitivity of semiconductor materials by both UV and visible light is considered. When activated by UV light, the typical approaches for creating materials are (i) the use of individual metal oxides, (ii) chemical modification with nanoparticles of noble metals and their oxides, (iii) and the creation of nanocomposite materials based on metal oxides. In the case of visible light activation, the approaches used to enhance the photo- and gas sensitivity of wide-gap metal oxides are (i) doping; (ii) spectral sensitization using dyes, narrow-gap semiconductor particles, and quantum dots; and (iii) addition of plasmon nanoparticles. Next, approaches to the description of the mechanism of the sensor response of semiconductor sensors under the action of light are considered.

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“…4 Recently, semiconductor photocatalysts for visible light-driven hydrogen production possessing low cost, high efficiency and eco-friendliness are developed as an effective way for converting solar energy into hydrogen energy by water splitting. 5,6 Metal oxide semiconductor photocatalysts, such as TiO 2 , 7,8 MnO 2 , 9 ZnO 10,11 and WO 3 12 have been used for hydrogen production. However, most of them were seriously limited by the commercial application of water splitting due to low efficiency, unsustainable supply, poor stability and the high recombination rate of the photoinduced electron–hole pairs.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin ZIS nanosheets encapsulated in metal–organic-framework-derived CNCo-Fe₃O₄ as an efficient functional photocatalyst for hydrogen evolution

Luo

Xue

et al. 2022

J. Mater. Chem. A

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Unveiling the impact of interfacially engineered selective V2O5 nanobelt bundles with flake-like ZnO and Co–ZnO thin films for multifunctional visible-light water splitting and toxic gas sensing

Cited by 14 publications

References 41 publications

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Light Activation of Nanocrystalline Metal Oxides for Gas Sensing: Principles, Achievements, Challenges

Ultrathin ZIS nanosheets encapsulated in metal–organic-framework-derived CNCo-Fe₃O₄ as an efficient functional photocatalyst for hydrogen evolution

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Unveiling the impact of interfacially engineered selective V2O5 nanobelt bundles with flake-like ZnO and Co–ZnO thin films for multifunctional visible-light water splitting and toxic gas sensing

Cited by 14 publications

References 41 publications

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

Light Activation of Nanocrystalline Metal Oxides for Gas Sensing: Principles, Achievements, Challenges

Ultrathin ZIS nanosheets encapsulated in metal–organic-framework-derived CNCo-Fe3O4 as an efficient functional photocatalyst for hydrogen evolution

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Ultrathin ZIS nanosheets encapsulated in metal–organic-framework-derived CNCo-Fe₃O₄ as an efficient functional photocatalyst for hydrogen evolution