Fabrication of α-TeO2 smooth and beaded microwires by thermal evaporation method

Filippo, Emanuela; Micocci, G.; Tepore, A.; Siciliano, Tiziana

doi:10.1016/j.jcrysgro.2011.09.047

Cited by 16 publications

(8 citation statements)

References 28 publications

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“…Tellurium oxide thin films have been prepared by various techniques such as reactive sputtering [10], dip-coating [11] and vapor deposition [12]. However, so far there are a few works reported in literature relating to the synthesis of α-TeO 2 nano and microstructures [13][14][15][16][17][18][19]. Jiang et al [13] fabricated tellurium oxide nanorods by laser ablation of elemental tellurium on the glass substrate in a hot air atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Teo2 Nan particles by Pulsed Laser Ablation in Water

Khalef¹

2014

ETJ

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Tellurium dioxide (TeO 2 ) nanoparticles were synthesized directly by pulsed laser ablation using Nd:YAG, λ=1064nm laser in pure water. The AFM and XRD measurements, in combination with FTIR and UV-Vis spectroscopy have been employed for the characterization of the prepared samples. The effects of operating parameters on nanoparticles composition, production rate and size were also studied. The XRD measurements revealed crystallization structure of TeO 2 nanoparticles. The particle diameter by use of Scherer's equation was calculated to be about 28. nm and confirmed by AFM measurements. The UV-vis spectrum of the colloidal nanoparticles shows maximum absorbance around the UV region, indicating the formation of TeO 2 nanoparticles, which confirmed by FTIR.

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Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Teo2 Nan particles by Pulsed Laser Ablation in Water

Khalef¹

2014

ETJ

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“…Characterization of gCN-TZ nanocomposites X-ray diffraction results of the as-synthesized gCN-TZ and pristine ZnO NPs showed 2θ values related to (100), ( 101), (102), (110), ( 103) and (112) planes (figure 2), corresponding to the hexagonal wurtzite phase of ZnO (JCPDS card No: 5-0664) [22]. Herein, broad diffraction peaks at 28.96 °is ascribed to TeO 2 [24,25].The average grain size of 5% TZ is found to be 14 nm and 2% g-CN-TZ showed 35 nm, which are calculated using Image J software. In XRD, the peaks corresponding to gCN are visible only from 20% gCN onwards, as shown in figure 1.…”

Section: Resultsmentioning

confidence: 98%

Formulation of dual functional gCN/TeO₂-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Singh¹,

Dasauni²,

KumarNailwal³

et al. 2023

Nanotechnology

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A simple cost-effective sono-chemical method was used for the synthesis of gCN/TeO2-ZnO ternary (2%, 5%, and 10%) nanocomposites, having crystallite size of 12 nm. FE-SEM and transmission electron microscopy images revealed the formation of core–shell type nanocomposites with an average size of 50 nm. Further, E. coli MTCC 443 strain is used as a model organism to study the antibacterial activity of the prepared nanocomposites, using disc diffusion method. Among all the concentrations, 2% gCN/TeO2-ZnO showed maximum zone of inhibition of 23 ± 0.10 mm and its antibacterial activity is like third-generation antibiotic cefotaxime. In addition, the prepared nanocomposites were used as nanofertilizer for the growth of gram seeds Chickpea (Cicer arietinum). The effect of nanocomposite concentration and its sterilising properties are studied on the rate of germination of Chickpea using both in vitro and in vivo studies (pot study). The root length of the gCN/TeO2-ZnO treated plants showed increase in seed germination (3.30 cm) compared to untreated plants (3.22 cm). In addition, enhancement in the shoot length about 28% is noticed in pot studies, compared to control batch samples. The accumulation of nanomaterial in plant roots was confirmed using SEM-EDX and ICP-MS. Finally, a 14-day experiment was conducted to ascertain the role of gCN/TeO2-ZnO in the controlled release of nutrients from the synthesised nanofertilizer. Owing to its excellent water holding capacity, sterilizing properties, and low toxicity this material can be used as a growth promoter in plants.

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“…In addition to the loss of active materials due to the shuttle effect, we also investigated the negative effects of volume variation that ZnTe electrodes suffer during the discharge/charge process. According to the densities of ZnTe (6.34 g cm −3 ), [ 40 ] Te (6.24 g cm −3 ), [ 41 ] and TeO 2 (5.67 g cm −3 ), [ 42 ] the molar volumes of ZnTe, Te and TeO 2 are calculated to be 30.44, 20.45 and 28.14 cm 3 mol −1 , respectively. Therefore, the volume expansion rate (%∆V) of Te to ZnTe and Te to TeO 2 should be 49% and 38%, respectively, according to the following equation: [ 43 ]

\begin{equation}{\mathrm{\% \Delta }}V\ = ({V}_{\mathrm{f}}\ - {V}_{\mathrm{i}})/{V}_{\mathrm{i}}{\mathrm{*}}100{\mathrm{\% }}\end{equation}

where V f and V i are the molar volume of the material before and after conversion, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…In addition to the loss of active materials due to the shuttle effect, we also investigated the negative effects of volume variation that ZnTe electrodes suffer during the discharge/charge process. According to the densities of ZnTe (6.34 g cm −3 ), [40] Te (6.24 g cm −3 ), [41] and TeO 2 (5.67 g cm −3 ), [42] the molar volumes of ZnTe, Te and TeO 2 are calculated to be 30.44, 20.45 and 28.14 cm 3 mol −1 , respectively. Therefore, the volume expansion rate (%∆V) of Te to ZnTe and Te to TeO 2 should be 49% and 38%, respectively, according to the following equation: [43] %ΔV…”

Section: Failure Mechanismmentioning

confidence: 99%

Rationally Designed ZnTe@C Nanowires with Superior Zinc Storage Performance for Aqueous Zn Batteries

Zhang

Xin

et al. 2023

Small

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Te‐based materials with excellent electrical conductivity and ultra‐high volume specific capacity have attracted much attention for the cost‐efficient aqueous Zn batteries. However, the construction of functional structures with mild volume expansion and suppressed shuttle effects, enabling an expanded lifespan, is still a challenge for conversion‐type materials. Herein, the carbon‐coated zinc telluride nanowires (ZnTe@C NWs) are rationally designed as a high‐performance cathode material for aqueous Zn batteries. The carbon‐coated1D nanostructure could not only provide optimized transmission path for electrons and ions, but also help to maintain structure integrity upon volume variation and suppress intermediates dissolution, endowing the ZnTe@C NWs with improved cycling stability and reaction kinetics. Consequently, a reversible six‐electron reaction mechanism of ZnTe@C NWs based on Te2−/Te4+ conversion with excellent output capacity (586 mAh g−1 at 0.1 A g−1) and lifespan (>250 mAh g−1 retained for 400 cycles at 1 A g−1) is eventually achieved.

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Fabrication of α-TeO2 smooth and beaded microwires by thermal evaporation method

Cited by 16 publications

References 28 publications

Preparation and Characterization of Teo2 Nan particles by Pulsed Laser Ablation in Water

Preparation and Characterization of Teo2 Nan particles by Pulsed Laser Ablation in Water

Formulation of dual functional gCN/TeO₂-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Rationally Designed ZnTe@C Nanowires with Superior Zinc Storage Performance for Aqueous Zn Batteries

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Fabrication of α-TeO2 smooth and beaded microwires by thermal evaporation method

Cited by 16 publications

References 28 publications

Preparation and Characterization of Teo2 Nan particles by Pulsed Laser Ablation in Water

Preparation and Characterization of Teo2 Nan particles by Pulsed Laser Ablation in Water

Formulation of dual functional gCN/TeO2-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent

Rationally Designed ZnTe@C Nanowires with Superior Zinc Storage Performance for Aqueous Zn Batteries

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Formulation of dual functional gCN/TeO₂-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent