Convenient preparation of CdS nanostructures as a highly efficient photocatalyst under blue LED and solar light irradiation

Eskandari, Parvin; Kazemi, Foad; Azizian‐Kalandaragh, Yashar

doi:10.1016/j.seppur.2013.09.039

Cited by 31 publications

(13 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure depicts the absorption, PL spectra and emission under UV excitation of the prepared CdS QDs using the photochemical approach and inset is the emission of the CdS synthesized QDs under UV‐365 nm excitation. The band edge of the QDs was obtained about 2.85 eV which is higher than that of bulk CdS (2.42 eV) . A broad band white emission between 400 and 700 nm can be observed from PL spectra which it was attributed to the recombination of trapped charge carriers at surface defects based on the previous studies on CdS …”

Section: Resultsmentioning

confidence: 99%

CdSe and CdSe/CdS core–shell QDs: New approach for synthesis, investigating optical properties and application in pollutant degradation

2017

View full text Add to dashboard Cite

In this work, CdSe quantum dots (QDs) were synthesized by a simple and rapid microwave activated approach using CdSO , Na SeO as precursors and thioglycolic acid (TGA) as capping agent molecule. A novel photochemical approach was introduced for the growth of CdS QDs and this approach was used to grow a CdS shell around CdSe cores for the formation of a CdSe/CdS core-shell structure. The core-shells were structurally verified using X-ray diffraction, transmission electron microscopy and FTIR (Fourier-transform infrared (FTIR)) spectroscopy. The optical properties of the samples were examined by means of UV-Vis and photoluminescence (PL) spectroscopy. It was found that CdS QDs emit a broad band white luminescence between 400 to 700 nm with a peak located at about 510 nm. CdSe QDs emission contained a broad band resulting from trap states between 450 to 800 nm with a peak located at 600 nm. After CdS shell growth, trap states emission was considerably quenched and a near band edge emission was appeared about 480 nm. Optical studies revealed that the core-shell QDs possess strong ultraviolet (UV) - visible light photocatalytic activity. CdSe/CdS core-shell QDs, showed an enhancement in photodegradation of Methyl orange (MO) compared with CdSe QDs.

show abstract

Section: Resultsmentioning

confidence: 99%

CdSe and CdSe/CdS core–shell QDs: New approach for synthesis, investigating optical properties and application in pollutant degradation

2017

View full text Add to dashboard Cite

show abstract

“…48 Photocatalytic reduction of p-nitroaniline on the C dots/CdS QDs film under a 3W LED light was presented as a typical example (Fig. Using LED lamps as light sources offer several advantages such as high photon efficiency, low electrical power, high power stability, emission in broader spectral wavelengths, and no need for cooling during long time operation.…”

Section: Resultsmentioning

confidence: 99%

Well-controlled layer-by-layer assembly of carbon dot/CdS heterojunctions for efficient visible-light-driven photocatalysis

Chai

Wang

et al. 2015

J. Mater. Chem. A

View full text Add to dashboard Cite

Fluorescent carbon dots have attracted great attention, but the application in potocatalysis has not been well explored. Herein we report a facile layer-by-layer method to fabricate uniform C dots/CdS heterojunction films via electrophoretic and sequential chemical bath deposition method. Because no ligands are used, the strategy facilitates the formation of intimate interfacial contact beneficial for charge separation and transfer, which can lead to a high photocurrent density of 2.6 mA•cm -2 . In addition, the electron donor-acceptor heterojunction can expedite charge separation and effectively suppress electron-hole pair recombination, eventually contributing to enhanced photoelectrochemical and/or photocatalytic efficiency of the system. As a proof-of-concept, the hybrid films manifested themselves as efficient visible-light-driven photocatalyst when applied for reduction of nitro-benzene derivatives in aqueous phase under low power irradiation. Our findings thus establish a new frontier on the rational design and fabrication of well-controlled hybrid films with built-in heterojunctions for solar light conversion.

show abstract

“…Because of these properties of CdS, it is said that CdS is promising material for visible light absorption and one of the best candidate as window layer material in the thin film solar cells such as CdS/CdTe and ZnO/CdS/CuInGaSe 2 to get out of the recombination of photogenerated carriers, which increases the performance of the solar cells [5][6][7]. In addition, it can be used in many fields such as thermoelectric effect, quantum dots for various applications, luminescence, optoelectronic devices, photocatalytic hydrogen evolution, transistors and so on [8][9][10][11][12][13]. Many elements, like Zn [14][15][16], Ce [17], Mn [18], Cu [19], Ni [20], Fe [21] and In [22,23] have been doped into CdS to demonstrate tunable optical and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Indium doping on the structural, surface and optical properties of CdS thin films prepared by ultrasonic spray pyrolysis method

Baturay¹

2017

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

View full text Add to dashboard Cite

CdS nanostructures are important and useful materials for photovoltaic applications. In this paper, pure CdS and In doped CdS (CdS:In) thin films were fabricated on soda lime glass substrate using ultrasonic spray pyrolysis (USP) method, to investigate the effect In concentration on the structural behavior, surface and optical properties of the CdS thin films by X-ray diffraction (XRD), Atomic Force Microscopy (AFM) and Ultraviolet-visible (Uv-vis)

show abstract

Convenient preparation of CdS nanostructures as a highly efficient photocatalyst under blue LED and solar light irradiation

Cited by 31 publications

References 33 publications

CdSe and CdSe/CdS core–shell QDs: New approach for synthesis, investigating optical properties and application in pollutant degradation

CdSe and CdSe/CdS core–shell QDs: New approach for synthesis, investigating optical properties and application in pollutant degradation

Well-controlled layer-by-layer assembly of carbon dot/CdS heterojunctions for efficient visible-light-driven photocatalysis

Indium doping on the structural, surface and optical properties of CdS thin films prepared by ultrasonic spray pyrolysis method

Contact Info

Product

Resources

About