Two-Phase Route to High Quality ZnO Quantum Dots with High Stability of Dispersity, Structure and Optical Properties

Zhang, Chengbo; Li, Keyan; Song, Shuyan; Xue, Dongfeng

doi:10.1166/sam.2012.1406

Cited by 9 publications

(6 citation statements)

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“…Based on principle of sulfur fixation by Co, Shixue Dou and co‐workers innovatively bridged the battery and electrocatalyst fields by introducing Co atoms into microporous carbon spheres (S/Co n –HC) (Figure 5b). [ 25c ] The S/Co n –HC electrodes demonstrated a high initial reversible specific capacity of 1081 mA h g −1 . After 600 cycles, the capacity was maintained at 508 mA h g −1 at a current density of 100 mA g −1 .…”

Section: Electrocatalytic Inhibitionmentioning

confidence: 99%

“…Many strategies, such as physical inhibition, [ 21,23 ] chemical interaction, [ 24 ] and electrocatalysis, [ 25 ] have been exploited using various carriers to inhibit the shuttle effect and promote the formation kinetics of Na 2 S. [ 26 ] Carbon and carbonaceous materials (e.g., carbon nanotubes, [ 27 ] carbon hollow nanospheres, [ 28 ] carbon fiber cloth, [ 17,23g,29 ] conducting polymers, [ 30 ] and MOFs [ 23b ] ) are the most commonly used sulfur carriers to physically and chemically inhibit the shuttle effect due to their high electron conductivity. [ 25c,28a,31 ] For pure carbon and carbonaceous materials, [ 31p,32 ] the design of the pore structure (i.e., micropores, mesopores, and macropores) [ 22,27a,33 ] is one of the most important physical strategies used to inhibit the shuttle effect of polysulfide. Among the abovementioned pore structure types, a microporous structure exhibits the best ability to encapsule polysulfides.…”

Section: Introductionmentioning

confidence: 99%

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Strategies for Polysulfide Immobilization in Sulfur Cathodes for Room‐Temperature Sodium–Sulfur Batteries

Zhou

Yang

2021

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Room‐temperature sodium–sulfur batteries are one of the most attractive energy storage systems due to their low cost and ultrahigh energy density (2600 W h kg−1). During the charge/discharge process, the sulfur can react with sodium via a multistep redox reaction to obtain a high specific capacity (1675 mA h g−1). However, these batteries face the difficult challenge of the “shuttle effect,” which hinders their practical application. Many strategies have been employed to address this issue on sulfur electrodes, such as intact physical confinement, chemical inhibition, and electrocatalysis. In this review, the mechanisms of the abovementioned strategies are summarized, the remaining issues are clarified, and research directions are proposed for developing advanced sodium–sulfur batteries.

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Section: Electrocatalytic Inhibitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strategies for Polysulfide Immobilization in Sulfur Cathodes for Room‐Temperature Sodium–Sulfur Batteries

Zhou

Yang

2021

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“…The origin of the strong deep level emission was due to the heavy doping of gallium ions into the lattices of ZnO which reflect the origination of some defects in the ZnO lattice by gallium ions doping. [26][27][28][29][30][31] …”

Section: Room-temperature Photoluminescence (Pl)mentioning

confidence: 99%

Effect of Gallium Concentrations on the Morphologies, Structural and Optical Properties of Ga-Doped ZnO Nanostructures

Algarni¹,

Mm²,

Al-Assiri³

2014

j. nanosci. nanotech.

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The effect of gallium ion concentrations (0.5 and 2%) on the morphologies, structural and optical properties of Ga-doped ZnO nanostructures are presented. Ga-doped ZnO nanostructures were synthesized on silicon substrates by simple thermal evaporation process using metallic zinc and Ga powders in the presence of oxygen. Interestingly, it was observed that Ga-ions incorporation in ZnO nanomaterials play an important role on the growth kinetics and hence on the morphologies of as-grown Ga-doped ZnO nanostructures. It was seen that at low Ga-concentration, needle-shaped Ga-doped ZnO nanostructures are formed, presumably by subsequent stacking of hexagonal plates. However, when increasing the Ga-concentration, multipods of Ga-doped ZnO were grown. In addition to the morphologies, incorporating Ga-ions into ZnO also affect the room-temperature photoluminescence properties. Therefore, at lower Ga-ion concentration, an intense UV emission was observed while at high Ga-concentration a deep level emission was seen in the room-temperature photoluminescence spectra. This research demonstrates that by controlling the Ga-ion concentration the morphologies and optical properties of ZnO nanomaterials can be tailored.

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“…Inorganic colloidal semiconductor quantum dots (QDs) with precisely controlled compositions and shapes have shown valuable physical and chemical properties [1][2][3]. These QDs are passivated either with organic ligands or inorganic passivation layers [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Wide emission-tunable CdTeSe/ZnSe/ZnS core–shell quantum dots and their conjugation with E. coli O-157

Zhou

et al. 2015

Materials Research Bulletin

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Two-Phase Route to High Quality ZnO Quantum Dots with High Stability of Dispersity, Structure and Optical Properties

Cited by 9 publications

References 0 publications

Strategies for Polysulfide Immobilization in Sulfur Cathodes for Room‐Temperature Sodium–Sulfur Batteries

Strategies for Polysulfide Immobilization in Sulfur Cathodes for Room‐Temperature Sodium–Sulfur Batteries

Effect of Gallium Concentrations on the Morphologies, Structural and Optical Properties of Ga-Doped ZnO Nanostructures

Wide emission-tunable CdTeSe/ZnSe/ZnS core–shell quantum dots and their conjugation with E. coli O-157

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