Thermoluminescence in heavily F-doped of SnO2 nanocrystals

Kumar, Vinod; Nagarajan, Rajamani

doi:10.1016/j.cplett.2012.02.021

Cited by 14 publications

(13 citation statements)

References 35 publications

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“…It is noteworthy that no glow peak was observed for the Er-doped SnO 2 in the temperature range of 350-650 K (Figure 8a). Additionally, the glow curve in the (Er, F) co-doped SnO 2 occurred at a slightly higher temperature as compared to the heavily F-doped SnO 2 system (448 K) [18]. The OVs, due to the heavy doping of O 2− ions with the F − ions, and the hole created by the co-dopant Er 3+ might possibly interact, leading to the formation of an appreciable concentration of trapped states resulting in intense TL emission [49].…”

Section: Resultsmentioning

confidence: 99%

“…There are indications that OVs might be serving as traps for free electrons giving F + (e Figure 8b). The heavily F-doped SnO 2 system showed 3 types of traps [18]. The figure of merit (FOM), a parameter describing the quality of fitting, was calculated [24].…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, Er-doped SnO 2 structures have been reported as potential candidates as waveguides, electroluminescent displays, or building blocks for advanced materials [16]. While numerous reports are available on the F-doping of SnO 2 (both in films and in powders) [17,18], limited studies exist on Er-doping in SnO 2 because of the enormous size difference between Er 3+ and Sn 4+ and the preference of Er 3+ to have coordination numbers greater than 6 [16,[19][20][21]. The present paper describes the synthesis of SnO 2 nanocrystals co-doped with Er 3+ and F − using a single-source precursor.…”

Section: Introductionmentioning

confidence: 99%

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Optical and magnetic properties of (Er, F) co-doped SnO$_{2}$ nanocrystals

Kumar¹,

Uma²,

Nagarajan³

2014

Turk J Phys

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Uniformly (Er, F) co-doped SnO 2 nanocrystals, obtained by a low-temperature solution-based method, were characterized by a variety of analytical techniques. The structure, morphology, and ratio of the elements were confirmed by PXRD, SEM, and TEM analysis, respectively. From XPS analysis, atomic concentrations of Sn, O, and F were quantified. Interparticle pore size increased significantly (with a mean pore diameter of 25.82 nm) in the codoped sample. Higher in-plane oxygen vacancies and bands due to multiphonon scattering were observed in the Raman spectrum of the sample. The defect traps in the sample were experimentally determined using TL spectroscopy. A broad intense glow curve at 485 K and a weak emission at 600 K in the TL spectrum were quenched on exposure to UV radiation. A large blue shift of the exciton absorption (due to the Moss-Burstein effect) and sharp bands due to intraconfigurational f − f transitions were observed for (Er, F) co-doped SnO 2 with an estimated band gap of 4.18 eV.From the photoluminescence spectral studies, 3 types of emission centers at 471 nm, 546 nm, and 627 nm were detected.Co-doping stabilized ferromagnetism in SnO 2 at room temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optical and magnetic properties of (Er, F) co-doped SnO$_{2}$ nanocrystals

Kumar¹,

Uma²,

Nagarajan³

2014

Turk J Phys

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“…Some metals, including transition and rare earth metals, have been successfully doped into SnO 2 QDs [18,[70][71][72][73][74][75][76][77][78][79][80][81][82][83].…”

Section: Metal-doped Sno 2 Qdsmentioning

confidence: 99%

“…It is found that two nonmetal elements, namely nitrogen [79], fluorine [73,74,76], have also been doped into SnO 2 QDs. For instance, Zhou et al [79] have fabricated nitrogen-doped SnO 2 QDs with sizes of 2.2, 5.4 nm by continuously stirring the solution of tin powers, nitric acid and deionized water for 40 h, followed by annealing in O 2 atmosphere at 500, 700°C, respectively.…”

Section: Nonmetal-doped Sno 2 Qdsmentioning

confidence: 99%

Highlights on advances in SnO₂ quantum dots: insights into synthesis strategies, modifications and applications

Chen

Huang

et al. 2018

Materials Research Letters

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The applications of SnO 2 are benefited from its nanostructure with different sizes and novel morphologies. When the size of nanoparticles reduces to 1-10 nm, the unique physical and chemical properties will make prominent. SnO 2 quantum dots (QDs), a type of zero-dimensional ultrasmall SnO 2 nanomaterials with a size in 1-10 nm, have displayed unique physical and chemical properties, which are different from those of their larger-sized ones. This review summarizes various synthesis strategies of SnO 2 QDs and the methods of their modifications, discusses their applications in lithium-ion batteries, photocatalysis, and gas sensors. These applications profit from the characteristic properties inherent in SnO 2 QDs. IMPACT STATEMENT This paper provides a comprehensive understanding for fabricating SnO 2 quantum dots and their modifications via various methods for the applications in lithium-ion batteries, photocatalytic degradations, and solid-state gas sensors.

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Facile Synthesis of N‐Doped SnO₂ Nanoparticles: A Cocatalyst‐Free Promising Photocatalyst for Hydrogen Generation

et al. 2020

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A facile solution‐based one‐step synthetic approach has been employed for an easy introduction of Nitrogen (N) into SnO2 lattice under the mild condition for a cocatalyst free hydrogen generation by photocatalytic water splitting. The crystal structure and morphology of synthesized N doped SnO2 nanoparticles were confirmed by powder X‐ray diffraction and electron microscopic techniques. Analysis by X‐ray Photoelectron Spectroscopy confirms that 4.6 % N was present in SnO2 lattice, while broadband observed in the Raman spectrum reveals the presence of oxygen vacancies and disordered structure due to N‐doping. The nanoparticles exhibit high surface area (139.7 m2/g) and bandgap close to 3.45 eV as deduced from Brunauer‐Emmett‐Teller (BET) measurement and Diffuse reflectance spectroscopic technique, respectively. The photocatalytic performance of the nanoparticles was evaluated by water splitting reaction for hydrogen generation using a photochemical reactor consisting of a Xenon lamp and was performed using different scavengers. It was found that out of various scavengers, maximum hydrogen yield, i. e., 169 μmol/g was achieved by N doped SnO2 nanoparticles with methanol and the order of scavengers for hydrogen generation using N doped SnO2 nanoparticles is Methanol>EDTA>TEOA.

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Thermoluminescence in heavily F-doped of SnO2 nanocrystals

Cited by 14 publications

References 35 publications

Optical and magnetic properties of (Er, F) co-doped SnO$_{2}$ nanocrystals

Optical and magnetic properties of (Er, F) co-doped SnO$_{2}$ nanocrystals

Highlights on advances in SnO₂ quantum dots: insights into synthesis strategies, modifications and applications

Facile Synthesis of N‐Doped SnO₂ Nanoparticles: A Cocatalyst‐Free Promising Photocatalyst for Hydrogen Generation

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Thermoluminescence in heavily F-doped of SnO2 nanocrystals

Cited by 14 publications

References 35 publications

Optical and magnetic properties of (Er, F) co-doped SnO$_{2}$ nanocrystals

Optical and magnetic properties of (Er, F) co-doped SnO$_{2}$ nanocrystals

Highlights on advances in SnO2 quantum dots: insights into synthesis strategies, modifications and applications

Facile Synthesis of N‐Doped SnO2 Nanoparticles: A Cocatalyst‐Free Promising Photocatalyst for Hydrogen Generation

Contact Info

Product

Resources

About

Highlights on advances in SnO₂ quantum dots: insights into synthesis strategies, modifications and applications

Facile Synthesis of N‐Doped SnO₂ Nanoparticles: A Cocatalyst‐Free Promising Photocatalyst for Hydrogen Generation