Synthesis and optical properties of S-doped ZnO nanowires

Geng, Bo; Wang, G. Z.; Jiang, Zhi Hong; Xie, Tian; Sun, Shuhui; Meng, Gang; Zhang, L. D.

doi:10.1063/1.1588735

Cited by 155 publications

(97 citation statements)

References 18 publications

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“…Furthermore, in some cases, ZnO displays dramatically impressive photo-catalytic activities compared with broadly studied TiO 2 [88,91,[151][152][153][154][155][156][157][158][159][160]. In addition, element doping including both metal and nonmetal (C, N, S) doping could lead to an enhanced photo-catalytic activity; interestingly, most non-metal dopings were reported in photo-catalytic water splitting [161][162][163][164][165][166][167][168].…”

Section: Applications To Photo-catalysismentioning

confidence: 99%

The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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Zinc oxide (ZnO), with the unique chemical and physical properties of high chemical stability, broad radiation absorption range, high electrochemical coupling coefficient, and high photo-stability, is an attractive multifunctional material which has promoted great interest in many fields. What is more, its properties can be tuned by controllable synthesized morphologies. Therefore, after the success of the abundant morphology controllable synthesis, both the morphology-dependent ZnO properties and their related applications have been extensively investigated. This review concentrates on the properties of morphology-dependent ZnO and their applications in catalysis, mainly involved reactions on green energy and environmental issues, such as CO 2 hydrogenation to fuels, methanol steam reforming to generate H 2 , bio-diesel production, pollutant photo-degradation, etc. The impressive catalytic properties of ZnO are associated with morphology tuned specific microstructures, defects or abilities of electron transportation, etc. The main morphology-dependent promotion mechanisms are discussed and summarized.

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Section: Applications To Photo-catalysismentioning

confidence: 99%

The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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“…Undoped nanowires feature strong UV emission at the band edge (~375 nm) and weak visible emission centered near 557 nm. As the concentration of thiourea was increased, the visible emission was enhanced relative to the UV emission, and the emission peak was blueshifted to near 517 nm as expected for sulfur-doped ZnO [28]. No significant enhancement or blue-shift of the visible emission was observed in urea-doped samples.…”

Section: Resultsmentioning

confidence: 53%

Sulfur-doped zinc oxide (ZnO) Nanostars: Synthesis and simulation of growth mechanism

et al. 2011

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We present a bottom-up synthesis, spectroscopic characterization, and ab initio simulations of star-shaped hexagonal zinc oxide (ZnO) nanowires. The ZnO nanostructures were synthesized by a low-temperature hydrothermal growth method. The cross-section of the ZnO nanowires transformed from a hexagon to a hexagram when sulfur dopants from thiourea [SC(NH 2 ) 2 ] were added into the growth solution, but no transformation occurred when urea (OC(NH 2 ) 2 ) was added. Comparison of the X-ray photoemission and photoluminescence spectra of undoped and sulfur-doped ZnO confirmed that sulfur is responsible for the novel morphology. Large-scale theoretical calculations were conducted to understand the role of sulfur doping in the growth process. The ab initio simulations demonstrated that the addition of sulfur causes a local change in charge distribution that is stronger at the vertices than at the edges, leading to the observed transformation from hexagon to hexagram nanostructures.

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“…PL spectra are powerful tools which are used widely to investigate the effect on luminescent properties of ZnO from S doping, as described in many previous reports [14][15][16][17]. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…More and more attention has been paid to chalcogen elements doping in ZnO, as S-doping in ZnO is expected to modify the electrical and optical properties between S and O. S-doped ZnO films and one-dimensional (1D) nanostructures such as nanowires and nanonails have been synthesized successfully by various methods [13][14][15][16][17]. However, the preparation methods mentioned above involve complex procedures, sophisticated equipment and rigorous experimental conditions.…”

Section: Introductionmentioning

confidence: 99%