One-step hydrothermal synthesis of cobalt and potassium codoped CdSe quantum dots with high visible light photocatalytic activity

Ma, Changchang; Zhou, Mingjun; Wu, Dan; Feng, Mengyao; Huo, Pengwei; Shi, Weidong; Ma, Zhijun; Yan, Yongsheng

doi:10.1039/c4ce02414a

Cited by 26 publications

(6 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It indicates that the peaks of the CdSe QDs (20 s reaction time) are located at 25.6, 43.3, and 48.7° corresponding to the (111), (220), and (311) planes of reflection, respectively. According to the XRD results, the crystal phase exhibits a cubic structure, which is similar to previous reports. , Das et al studied the influence of CdSe QD size and XRD peaks . They state that the lattice parameter of CdSe QDs is increased as size increased.…”

Section: Resultssupporting

confidence: 77%

See 1 more Smart Citation

Tungsten Trioxide Doped with CdSe Quantum Dots for Smart Windows

Hasani

Tekalgne

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Nanocrystal quantum dots (QDs) provide tunable optoelectronic properties on the basis of their dimension. CdSe QDs, which are size-dependent colloidal nanocrystals, are used for efficient electrochromic devices owing to their unique properties in modulating quantum confinement, resulting in enhanced electron insertion during the electrochromic process. Incorporating a well-known metal oxide electrochromic material such as WO 3 into CdSe QDs enhances the redox process. Herein, we propose a facile method for producing and optimizing CdSe QDs doped in WO 3 . The fabrication of the electrochromic film involves a solution and annealing process. Moreover, the effect of the QD size to optimize the electrochromic layer is studied. As a result, the coloration efficiency of WO 3 and optimized CdSe QD− WO 3 are obtained as 68.6 and 112.3 cm 2 /C, respectively. Thus, size-tunable nanocrystal QDs combined with a metal oxide yield high-performance electrochromic devices and are promising candidates for producing smart windows.

show abstract

Section: Resultssupporting

confidence: 77%

“…Figure 2c crystal phase exhibits a cubic structure, which is similar to previous reports. 28,29 Das et al studied the influence of CdSe QD size and XRD peaks. 30 They state that the lattice parameter of CdSe QDs is increased as size increased.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Tungsten Trioxide Doped with CdSe Quantum Dots for Smart Windows

Hasani

Tekalgne

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Semiconductor photocatalysts doped with transition metal ions significantly influence the photoreactivity by changing the recombination rates of electron-hole pairs and interfacial electron transfer due to the electronic synergetic effect between semiconductors and transition metals [25,26]. Furthermore, a dopant ion can enhance the photocatalytic activity of a photocatalyst by prolonging the lifetime of light-induced charge carriers [27,28]. Agglomeration and separation difficulties are the main concerns that arise in the practical application of a photocatalyst when used in powder form [29].…”

Section: Introductionmentioning

confidence: 99%

Ternary Composite of Co-Doped CdSe@electrospun Carbon Nanofibers: A Novel Reusable Visible Light-Driven Photocatalyst with Enhanced Performance

Panthi

Kwon

Kuk³

et al. 2020

Catalysts

View full text Add to dashboard Cite

In this work, flexible ternary composites of cobalt-doped cadmium selenide/electrospun carbon nanofibers (Co-CdSe@ECNFs) for photocatalytic applications were fabricated successfully via electrospinning, followed by carbonization. For the fabrication of the proposed photocatalysts, Co-CdSe nanoparticles were grown in situ on the surface of ECNFs during the carbonization of precursor electrospun nanofibers obtained by dispersing Se powder in the electrospinning solution of polyacrylonitrile/N,N-Dimethylformamide (PAN/DMF) containing Cd2+ and Co2+. The photocatalytic performance of synthesized samples is investigated in the photodegradation of methylene blue (MB) and rhodamine B (RhB) dyes. Experimental results revealed the superior photocatalytic efficiency of Co-CdSe@ECNFs over undoped samples (CdSe@ECNFs) due to the doping effect of cobalt, which is able to capture the photogenerated electrons to prevent electron–hole recombination, thereby improving photocatalytic performance. Moreover, ECNFs could play an important role in enhancing electron transfer and optical absorption of the photocatalyst. This type of fabrication strategy may be a new avenue for the synthesis of other ECNF-based ternary composites.

show abstract

“…And the low quantum yield of QDs CdSe has further limitted the photocatalytic properties . In that case, lots of researches have made efforts to discover the effective method to enhance the photocatalytic ability of QDs CdSe, such as introducing carbon materials, doping metal ions, couping wide band semiconductor and so on.…”

Section: Introductionmentioning

confidence: 99%

One‐Step Hydrothermal Method to Prepare Flower‐Like QDs CdSe‐Loaded BiOCl Sheets as a Promising Tool for Photodegradation

et al. 2019

View full text Add to dashboard Cite

The overcommitting Rhodamine has aroused widely attention for the mainly organic pollutant in dying and pringting process, which is difficultly to remove the contaminate in totally. Thus, the BiOCl‐based semiconductors with relatively high photocatalytic properties toward water pullution were well defined. However, the limitted application of BiOCl due to the wider band gap, which can only be irradiated by UV light. In this work, we further introduced CdSe quantum dots (QDs), for the small‐size effect, specific surface area, special absorbability, designed for anchoring on BiOCl surface. A facial one‐step hydrothermal synthesis was developed for flower‐like BiOCl‐CdSe composites. The photodegradation of 20 mg/L RhB research under UV‐vis irradiation, 10 wt% CdSe‐BiOCl semiconductors displayed well photocatalytic abilities. From the electrochemical analysis, the effective separation of e− and h+ occured on the CdSe‐BiOCl composites. And the main work radicals during the photocatalytic produre were the e+, h+ and •O2− by the ESR analysis. The CdSe‐BiOCl composites have an immense prospective as the photocatalysts in pratical application.

show abstract

One-step hydrothermal synthesis of cobalt and potassium codoped CdSe quantum dots with high visible light photocatalytic activity

Abstract: The effect of metal ion doping on the electronic structure and optical properties of CdSe quantum dots has been investigated by various characterization techniques and experiments.

Cited by 26 publications

References 33 publications

Tungsten Trioxide Doped with CdSe Quantum Dots for Smart Windows

Tungsten Trioxide Doped with CdSe Quantum Dots for Smart Windows

Ternary Composite of Co-Doped CdSe@electrospun Carbon Nanofibers: A Novel Reusable Visible Light-Driven Photocatalyst with Enhanced Performance

One‐Step Hydrothermal Method to Prepare Flower‐Like QDs CdSe‐Loaded BiOCl Sheets as a Promising Tool for Photodegradation

Contact Info

Product

Resources

About