Synthesis of green TiO2/ZnO/CdS hybrid nano-catalyst for efficient light harvesting using an elegant pulsed laser ablation in liquids method

Gondal, M.A.; Ilyas, A.M.; Fasasi, Teslim Ayinde; Dastageer, M.A.; Seddigi, Zaki S.; Qahtan, Talal F.; Faiz, M.; Khattak, G. D.

doi:10.1016/j.apsusc.2015.09.213

Cited by 33 publications

(11 citation statements)

References 38 publications

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“…Literature data about laser ablation in liquid of composite materials confirm the complexity of the phenomena taking place during the irradiation. In some cases, for instance, the interaction between the laser and the composites led to the formation of new phases; this feature was not observed here.…”

Section: Resultsmentioning

confidence: 58%

Increased UV absorption properties of natural hydroxyapatite‐based sunscreen through laser ablation modification in liquid

et al. 2018

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Sunfilters based on hydroxyapatite (HAp) and iron‐containing compounds (Fe2O3 and calcium iron phosphates) are of increasing interest, as they show UV absorption without generating health endanger free radicals (usually observed when other inorganic sunscreens are used). In this paper, laser ablation of solids in liquids has been applied to improve the UV absorption properties of a HAp based Fe‐containing sunscreen powder derived from cod fish bones. Two different laser wavelengths were explored (532 and 1064 nm, green and infrared, respectively); an improved experimental device was used, to allow a fine control of the volume of the irradiated particles. Results show an increased UV absorbance for the laser‐treated powders in comparison with the untreated ones; this can be explained considering the smaller particle size and increased surface area; the higher iron concentration in the powders may also be determinant. Enhanced absorption was also observed in the near‐infrared range, making the powders even more suitable for sunscreen applications. The green laser was more effective than the infrared one. Overall, laser ablation showed to be a powerful technique to control the size of the sunscreen particles and tailor their optical properties.

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Section: Resultsmentioning

confidence: 58%

Increased UV absorption properties of natural hydroxyapatite‐based sunscreen through laser ablation modification in liquid

et al. 2018

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“…Commercial TiO 2 nanoparticle (<20 nm) purchased from Sigma-Aldrich is used as received in this work, and CdS was synthesized locally as reported in our previous work [33]. The nanoparticles (TiO 2 and CdS) mixture was prepared such that in 10%, 20%, and 40% by weight of CdS were added to TiO 2 such that three different nanocomposites with varied percentage weight of CdS are obtained.…”

Section: Synthesis Of Tio 2 and Cadmium Sulfide Nanocompositementioning

confidence: 99%

Facile synthesis of titanium dioxide-cadmium sulfide nanocomposite using pulsed laser ablation in liquid and its performance in photovoltaic and photocatalytic applications

Ilyas

Gondal

Yamani

et al. 2017

Int. J. Energy Res.

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Summary Narrow band gap semiconductors like cadmium sulfide (CdS) are being applied as an agent to reduce the band gap of metal oxide semiconductors like titanium dioxide (TiO2). In order to obtain a TiO2/CdS nanocomposite with reduced electron‐hole recombination and improved stability, we coupled 10%, 20%, and 40% by weight of CdS with TiO2 in this work using pulsed laser ablation in liquid technique. Here, 532 nm wavelength generated from neodymium‐doped yttrium aluminum garnet laser was directed into the TiO2/CdS mixture prepared in a colloid form to produce the TiO2/CdS nanocomposites. The effect of the CdS concentration on the performance of the obtained nanocomposite in a dye‐sensitized solar cell and photocatalytic degradation of methyl orange in water was studied in detail. However, the nanocomposite with 10% percentage weight of CdS in anatase TiO2 showed the best performance as compared with pure TiO2, and the photoconversion efficiency of the dye‐sensitized solar cell was improved from 0.6% to 4.3%, while the percentage of methyl orange degraded was enhanced from 58% to 82% after 36 min irradiation using ultraviolet–visible light. This improvement in photovoltaic and photodegradation properties is due to limited electron hole recombination rate, higher conduction of charge carriers, their longer lifetime during the photocatalytic process, improved ultraviolet–visible light activity, reduced photocorrosion, and improved pore size. Copyright © 2017 John Wiley & Sons, Ltd.

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“…The group also carried out the polymeric approach to patterning the DSSC anode, in addition with polymer electrolytes, for stable and efficient DSSC . Photosensitizer (dye) is the main component of DSSC which is adsorbed on the semiconducting material, for instance, TiO 2 and ZnO . The PCE of DSSC mainly depends on photosensitizer.…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of dye-sensitized solar cells via cosensitization of ruthenizer Z907 and organic sensitizer SQ2

et al. 2018

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Summary Cosensitization is a highly effective technique to enhance the photovoltaic performance of a dye‐sensitized solar cell. The main objective of this work is to improve the performance of dye‐sensitized solar cell using cosensitization approach and investigation of the effect of the organic cosensitizer concentration on the power conversion efficiency of the fabricated solar cell devices. In this work, Z907, a ruthenium dye, has been cosensitized with SQ2, an organic sensitizer, and an overall efficiency of 7.83% has been achieved. The fabricated solar cells were evaluated using UV‐Vis spectroscopy, current‐voltage (I‐V) characteristics, and electrochemical impedance spectroscopy analysis. Our results clearly indicate that the concentration of organic cosensitizer strongly affects the photovoltaic performance of fabricated solar cells. Upon optimization, the cell fabricated with 0.3 mM Z907 + 0.2 mM SQ2 dye solution demonstrated Jsc (mA/cm2) = 21.38, Voc (mV) = 698.37, FF (%) = 52.46, and power conversion efficiency of η (%) = 7.83 under standard AM1.5G 1 sun illumination (100 mW/cm2). It was observed that the efficiency of cosensitized solar cells is significantly superior than that of individual sensitized solar cells (Z907 [η = 5.08%] and SQ2 [η = 1.39%]). This enhancement in efficiency could be attributed to the lower electron‐hole recombination rate, decrease in competitive absorption of I−/I−3, and less dye aggregation because of the synergistic effect in cosensitized solar cells.

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Synthesis of green TiO2/ZnO/CdS hybrid nano-catalyst for efficient light harvesting using an elegant pulsed laser ablation in liquids method

Cited by 33 publications

References 38 publications

Increased UV absorption properties of natural hydroxyapatite‐based sunscreen through laser ablation modification in liquid

Increased UV absorption properties of natural hydroxyapatite‐based sunscreen through laser ablation modification in liquid

Facile synthesis of titanium dioxide-cadmium sulfide nanocomposite using pulsed laser ablation in liquid and its performance in photovoltaic and photocatalytic applications

Performance enhancement of dye-sensitized solar cells via cosensitization of ruthenizer Z907 and organic sensitizer SQ2

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