Synthesis of morphology-improved single-crystalline iron silicide nanowires with enhanced physical characteristics

Huang, Wei; Yang, Shu Meng; Liao, Tzu Ting; Lu, Kuo Chang

doi:10.1039/d1ce00267h

Cited by 7 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ZTO nanostructures have been fabricated for various important applications, including optical sensors [ 6 , 7 ], gas sensors [ 8 , 9 ], dye-sensitized solar cells [ 10 , 11 ] and photocatalysts [ 12 , 13 , 14 ]. In the past few years, different techniques have been applied in synthesizing one-dimensional ZTO nanostructures, including the hydrothermal method [ 15 , 16 ], CVD [ 7 , 17 ] and the template method [ 18 ], among which CVD is the best choice since it is more economical and environmentally friendly [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Photocatalytic Properties of Zinc Tin Oxide Nanowires Decorated with Silver Nanoparticles

Hsieh

Yang

et al. 2022

Nanomaterials

Self Cite

View full text Add to dashboard Cite

With the continuous advancement of high-tech industries, how to properly handle pollutants has become urgent. Photocatalysis is a solution that may effectively degrade pollutants into harmless molecules. In this study, we synthesized single crystalline Zn2SnO4 (ZTO) nanowires through chemical vapor deposition and selective etching. The chemical bath redox method was used to modify the ZTO nanowires with Ag nanoparticles to explore the photocatalytic properties of the nanoheterostructures. The combination of the materials here is rare. Optical measurements by photoluminescence (PL) and UV–Vis show that the PL spectrum of ZTO nanowires was mainly in the visible light region and attributed to oxygen vacancies. The luminescence intensity of the nanowires was significantly reduced after modification, demonstrating that the heterojunction could effectively reduce the electron-hole pair recombination. The reduction increased with the increase in Ag decoration. The conversion from the UV–Vis absorption spectrum to the Tauc Plot shows that the band gap of the nanowire was 4.05 eV. With 10 ppm methylene blue (MB) as the degradation solution, ZTO nanowires exhibit excellent photodegradation efficiency. Reusability and stability in photodegradation of the nanowires were demonstrated. Photocatalytic efficiency increases with the number of Ag nanoparticles. The main reaction mechanism was confirmed by photocatalytic inhibitors. This study enriches our understanding of ZTO-based nanostructures and facilitates their applications in water splitting, sewage treatment and air purification.

show abstract

Section: Introductionmentioning

confidence: 99%

Fabrication and Photocatalytic Properties of Zinc Tin Oxide Nanowires Decorated with Silver Nanoparticles

Hsieh

Yang

et al. 2022

Nanomaterials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Most of the metal-doped tungsten oxide nanowires are synthesized by the hydrothermal method [ 11 , 20 ] and solvent heat method [ 21 ], while in this work, we used a three-zone tube furnace to grow nanowires by the CVD method [ 22 , 23 , 24 ], which has fewer steps than the common doping methods. Moreover, the products here are less likely to be contaminated by the reactive solute solvent.…”

Section: Introductionmentioning

confidence: 99%

Chemical Vapor Deposition-Fabricated Manganese-Doped and Potassium-Doped Hexagonal Tungsten Trioxide Nanowires with Enhanced Gas Sensing and Photocatalytic Properties

Chen

Yang

et al. 2022

Nanomaterials

Self Cite

View full text Add to dashboard Cite

Owing to its unique and variable lattice structure and stoichiometric ratio, tungsten oxide is suitable for material modification; for example, doping is expected to improve its catalytic properties. However, most of the doping experiments are conducted by hydrothermal or multi-step synthesis, which is not only time-consuming but also prone to solvent contamination, having little room for mass production. Here, without a catalyst, we report the formation of high-crystallinity manganese-doped and potassium-doped tungsten oxide nanowires through chemical vapor deposition (CVD) with interesting characterization, photocatalytic, and gas sensing properties. The structure and composition of the nanowires were characterized by transmission electron microscopy (TEM) and energy-dispersive spectroscopy (EDS), respectively, while the morphology and chemical valence were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), respectively. Electrical measurements showed that the single nanowires doped with manganese and potassium had resistivities of 1.81×0−5 Ω· and 1.93×10−5 Ω·m, respectively. The doping contributed to the phase transition from monoclinic to metastable hexagonal for the tungsten oxide nanowires, the structure of which is known for its hexagonal electron channels. The hexagonal structure provided efficient charge transfer and enhanced the catalytic efficiency of the tungsten oxide nanowires, resulting in a catalytic efficiency of 98.5% for the manganese-doped tungsten oxide nanowires and 97.73% for the potassium-doped tungsten oxide nanowires after four hours of degradation of methylene blue. Additionally, the gas sensing response for 20 ppm of ethanol showed a positive dependence of doping with the manganese-doped and potassium-doped responses being 14.4% and 29.7%, respectively, higher than the pure response at 250 °C. The manganese-doped and potassium-doped tungsten oxide nanowires are attractive candidates in gas sensing, photocatalytic, and energy storage applications, including water splitting, photochromism, and rechargeable batteries.

show abstract

“…12,13 Electrochromism is also an important property of tungsten oxides. 14,15 In recent years, studies on nanowires have flourished; [16][17][18] thus, researchers tried to combine tungsten oxides and nanowires to enhance their applications. 19,20 With nanotechnology, people may obtain one-dimension tungsten oxide with improved properties as compared with three-dimension tungsten oxide; 21 hence, lots of methods that may be used to synthesize tungsten oxide nanowires or nanostructures have been developed, such as thermal evaporation, [22][23][24] the hydrothermal method, 25,26 chemical vapor deposition, 27,28 and pulsed laser deposition.…”

Section: Introductionmentioning

confidence: 99%

“…12,13 Electrochromism is also an important property of tungsten oxides. 14,15 In recent years, studies on nanowires have flourished; 16–18 thus, researchers tried to combine tungsten oxides and nanowires to enhance their applications. 19,20…”

Section: Introductionmentioning

confidence: 99%

Catalyst-free synthesis of tungsten oxide nanowires via thermal evaporation for fast-response electrochromic devices

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Synthesis of morphology-improved single-crystalline iron silicide nanowires with enhanced physical characteristics

Abstract: Single-crystalline iron silicide nanowires were synthesized via an original approach, pre-deposition method (PDM), with significantly improved morphologies and physical characteristics as compared with those fabricated by conventional chemical vapor deposition....

Cited by 7 publications

References 25 publications

Fabrication and Photocatalytic Properties of Zinc Tin Oxide Nanowires Decorated with Silver Nanoparticles

Fabrication and Photocatalytic Properties of Zinc Tin Oxide Nanowires Decorated with Silver Nanoparticles

Chemical Vapor Deposition-Fabricated Manganese-Doped and Potassium-Doped Hexagonal Tungsten Trioxide Nanowires with Enhanced Gas Sensing and Photocatalytic Properties

Catalyst-free synthesis of tungsten oxide nanowires via thermal evaporation for fast-response electrochromic devices

Contact Info

Product

Resources

About