Review of surface photovoltage spectra of nano-sized semiconductor and its applications in heterogeneous photocatalysis

Jing, Liqiang; X, Sun; Shang, Jian Ku; Cai, Weimin; Xu, Zhaoyi; Du, Yong; Fu, Honggang

doi:10.1016/s0927-0248(02)00393-8

Cited by 311 publications

(89 citation statements)

References 42 publications

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“…The nanoparticles were sonicated in ethanol for 30 min to eliminate agglomeration, centrifuged and dried at 70 °C in air. Gd 3+ doped zinc oxide were obtained under the similar conditions by replacing a fraction of Zn (CH 3 COO) 2 by Gd(NO 3 ) 3 (0.011 g), (0.022 g), (0.034 g) and (0.045 g) for 0.5 mol%, 1.0 mol%, 1.5 mol%, and 2 mol% doping respectively). The scheme of the synthetic procedure of Gd doped ZnO is presented in the Figure 1. …”

Section: Synthesismentioning

confidence: 99%

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Surfactant Assisted Sonochemical Synthesis and Characterization of Gadolinium Doped Zinc Oxide Nanoparticles

Khajuria¹,

Ladol²,

Singh³

et al. 2015

ACSi

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Pure and Gd doped Zinc Oxide (ZnO) nanoparticles were synthesized by sonochemical method using different surfactants (PVP/CTAB). The nanoparticles were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), particle size analysis by DLS technique and UV-Visible spectroscopy. The effect of Gd doping and nature of surfactants on crystallite size, morphology and band gap of ZnO nanoparticles have been investigated. In addition to this, the effect of nature of surfactant on amount of dopant inserted in the ZnO lattice was also studied.

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Section: Synthesismentioning

confidence: 99%

“…[1][2][3] A lot of research work has been done in the synthesis and characterization of semiconducting nanostructures such as ZnO, ZnS, PbS, CdS, CdSe and Ti-O 2.…”

Section: Introductionmentioning

confidence: 99%

Surfactant Assisted Sonochemical Synthesis and Characterization of Gadolinium Doped Zinc Oxide Nanoparticles

Khajuria¹,

Ladol²,

Singh³

et al. 2015

ACSi

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“…An alternative for the removal of dyes is photocatalytic degradation. This kind of process enables the complete destruction of the pollutant and has been studied thoroughly during the past 20 years, especially for liquid and gaseous effluents (Liqiang et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

A study of process variables for the photocatalytic degradation of rhodamine B

Soares

Lansarin

Moro

2007

Braz. J. Chem. Eng.

103

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-The photoactivated degradation reaction of rhodamine B (RB) was studied using P-25 TiO 2 (Degussa) as catalyst. Three process variables -temperature, initial pH, and catalyst concentration -were evaluated. Temperature had a slight effect on reaction rate; however, the combined effect of pH and catalyst concentration was greater. pH affected the catalyst particle's adsorption of RB, altering the reaction rate. The concentration of the catalyst was significant only up to 0,65 g L -1 . The effect of temperature was studied at optimum pH and 50ºC was found to be the optimum operational temperature. The effect of the presence of a surfactant (sodium dodecylsulfate, SDS) and ionic contaminants (Cl -and SO 4 --) in the reaction system was also studied. The surfactant improved the catalyst's adsorption of RB by more than 80%, increasing the degradation reaction rate as well. The ionic contaminants reduced the reaction rate.

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“…Based on the above analysis and previously demonstrated strong correlation between the surface defects and optoelectronic properties of ZnO materials [28,[48][49][50], one can expect that the SPV decays would be remarkably different in the SC samples obtained at different stirring times. This is exactly what is seen in Fig.…”

Section: Spv and Pl Decaysmentioning

confidence: 73%

Carrier recombination in sonochemically synthesized ZnO powders

Zakirov

Korotchenkov

2017

Materials Science-Poland

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ZnO powders with particle size in the nm to µm range have been fabricated by sonochemical method, utilizing zinc acetate and sodium hydroxide as starting materials. Carrier recombination processes in the powders have been investigated using the photoluminescence, FT-IR and surface photovoltage techniques. It has been shown that the photoluminescence spectra exhibit a number of defect-related emission bands which are typically observed in ZnO lattice and which depend on the sonication time. It has been found that the increase of the stirring time results in a faster decay of the photovoltage transients for times shorter than approximately 5 ms. From the obtained data it has been concluded that the sonication modifies the complicated trapping dynamics from volume to surface defects, whereas the fabrication method itself offers a remarkably convenient means of modifying the relative content of the surface-to-volume defect ratio in powder grains and altering the dynamics of photoexcited carriers.

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Review of surface photovoltage spectra of nano-sized semiconductor and its applications in heterogeneous photocatalysis

Cited by 311 publications

References 42 publications

Surfactant Assisted Sonochemical Synthesis and Characterization of Gadolinium Doped Zinc Oxide Nanoparticles

Surfactant Assisted Sonochemical Synthesis and Characterization of Gadolinium Doped Zinc Oxide Nanoparticles

A study of process variables for the photocatalytic degradation of rhodamine B

Carrier recombination in sonochemically synthesized ZnO powders

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