Solvothermal growth of single-crystal CdS nanowires

Mahdi, M.A.; Hassan, J.J.; Kasim, Sattar J.; Ng, Sha Shiong; Hassan, Z.

doi:10.1007/s12034-014-0655-4

Cited by 19 publications

(10 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As seen from figure 6, the energy band gap increased with increasing GeO 2 . An increase in the optical band gap of the prepared samples TiO 2 -(GeO 2 ) x can be related to the size effect that appears in nanocrystalline structures [33]. The optical properties of the TiO 2 -(GeO 2 ) x thin films indicate that they are suitable for use in fabricating DSSCs.…”

Section: Optical Measurementsmentioning

confidence: 89%

Crystal structure, optical and electrical characteristics of rutile $$\hbox {TiO}_{2}$$ nanocrystallite-based photoanodes doped with $$\hbox {GeO}_{2}$$

2019

View full text Add to dashboard Cite

The effect of germanium dioxide, GeO 2 doping on dye-sensitized solar cell (DSSC) TiO 2 nanocrystallite photoanodes with composition (TiO 2-(GeO 2) x : 0 ≤ x ≤ 0.3 wt%) has been studied. The pure sample and GeO 2-doped samples have been synthesized by a conventional solid-state reaction method and analysed by means of X-ray diffraction, scanning electron microscopy, energy dispersive X-ray and ultraviolet-visible spectroscopy techniques. The photovoltaic characteristics of the prepared samples have been studied by employing J-V measurements. The pattern of XRD depicted that the dominating phase in the sample with x = 0 is a rutile tetragonal phase with the P4 2 /mnm space group. An increase in GeO 2 concentration leads to an appearance and rise of another hexagonal phase structure of α-GeO 2 with the P3 2 21 space group. Data obtained from the UV-visible spectroscopy measurements reflect that the optical energy gap (E optical) increases with increasing GeO 2 content, while the optical refractive index decreases. J-V photovoltaic characteristics confirm that the DSSCs doped with low-concentration doping, x = 0.05 and 0.1 of GeO 2 have higher values for conversion efficiency (η), fill factor and short circuit current density (J sc) compared with samples with high-concentration doping (x = 0.2 and 0.3) of GeO 2. The present results showed that TiO 2-(GeO 2) x (x = 0.05 and 0.1 wt%) films are potential candidates for optical filter materials and optoelectrical and photo-conversion energy devices. Keywords. TiO 2 nanocrystallites; rutile-type TiO 2 ; optical energy gap; refractive index; efficiency.

show abstract

Section: Optical Measurementsmentioning

confidence: 89%

Crystal structure, optical and electrical characteristics of rutile $$\hbox {TiO}_{2}$$ nanocrystallite-based photoanodes doped with $$\hbox {GeO}_{2}$$

2019

View full text Add to dashboard Cite

show abstract

“…The emission peaks at 642 and 653 nm are observed to be broad and occurred at a lower energy value than that corresponding to the excitonic emission band, which can be attributed to surface defects that act as radiative or nonradiative centers or sulfur vacancies. 27 The PL results also suggest growth of nanoparticles governed by the "Ostwald ripening" mechanism. The smaller particles are thermodynamically less able because of their higher surface free energy.…”

mentioning

confidence: 94%

Synthesis and Optical Characteristics of PAM/HgS Nanocomposites

Qin¹,

Yang²,

Zhang³

et al. 2014

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

Polyacrylamide (PAM) -HgS nanocomposites were successfully prepared in polyacrylamide (PAM) matrix. From TEM and XRD characterizations, the synthesized HgS nanocrystals were chain-like spherical in shape with a diameter of about 40-60 nm and high crystalline quality. The quantum-confined effect of HgS nanocrystals was confirmed by UV-vis diffuse reflection spectra. The optical properties of products were investigated by using photoluminescence (PL) spectra, which showed that HgS nanocrystals exhibited good optical properties with maximum emission peak at about 640 and 650 nm at different reaction temperatures. The interaction of HgS nanocrystals with PAM was studied through FT-IR spectroscopy and TG analysis, which suggested that Hg 2+ could interact with functional groups of PAM. The experimental results indicated that PAM not only induced nucleation, but also inhibited further growth of HgS crystals and play an important role in the formation of PAM/HgS nanocomposites. In addition, the possible mechanism of HgS nanoparticles growth in PAM solution was also discussed.

show abstract

“…In recent years, in order to prepare CdS nanostructures with different morphologies and sizes, a number of methods have been explored to fabricate CdS crystals, such as solvothermal synthesis , thermal evaporation , the hydrothermal method , the chemical vapor deposition process , the template method , the thermal decomposition method , electrodeposition , a vapor–liquid–solid‐assisted process , a colloidal method and chemical‐bath deposition . In addition to these methods, it has been demonstrated that the hydrothermal method is an effective method to prepare nanostructures of CdS .…”

Section: Introductionmentioning

confidence: 99%

Preparation of dendritic‐like CdS by hydrothermal method and its photocatalytic performance

Yang

Wang

Jiang

et al. 2015

Crystal Research and Technology

View full text Add to dashboard Cite

In this article, dendritic-like CdS has been prepared by a hydrothermal method using thiourea as the sulfur source, and the effects of experimental conditions on the morphologies of CdS have been investigated. The performances of CdS have been analyzed by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and the fluorescence and photodegradation properties of CdS have also been investigated. The XRD result indicates that the dendriticlike CdS are of hexagonal phase and they are highly crystallized. Also, the FESEM results show that the ratio of raw material affects the yield of CdS, the reaction time affects the morphology of CdS. The best morphology of CdS is dendritic structures and the length is about 6 μm. The fluorescence spectrum shows three peaks at 470 nm, 513 nm and 547 nm, which indicates that the dendritic-like CdS mainly emits green and blue fluorescence. Moreover, the dendriticlike CdS exhibits good photocatalytic activity and its photodegradation rate to methylene blue can reach 92%. The growth mechanism for the formation of CdS with dendritic structure is also described.

show abstract

Solvothermal growth of single-crystal CdS nanowires

Cited by 19 publications

References 36 publications

Crystal structure, optical and electrical characteristics of rutile $$\hbox {TiO}_{2}$$ nanocrystallite-based photoanodes doped with $$\hbox {GeO}_{2}$$

Crystal structure, optical and electrical characteristics of rutile $$\hbox {TiO}_{2}$$ nanocrystallite-based photoanodes doped with $$\hbox {GeO}_{2}$$

Synthesis and Optical Characteristics of PAM/HgS Nanocomposites

Preparation of dendritic‐like CdS by hydrothermal method and its photocatalytic performance

Contact Info

Product

Resources

About