2006
DOI: 10.1021/jp064275y
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Synthesis and Characterization of ZnS Nanosized Semiconductor Particles within Mesoporous Solids

Abstract: ZnS semiconductor quantum dots have been synthesized using a method involving melt exchange reaction inside the pores of MCM-41 and subsequent reaction with H(2)S. The ZnS quantum dots-MCM-41 composite, which has been studied with XRD, EDS, and BET techniques, is shown to have retained within the pores the formed quantum dots, with a size distribution exhibiting a maximum nanoparticle diameter of ca. 1.8 nm. The structure and the sorption properties of the ZnS/MCM-41 composite have been studied by means of X-r… Show more

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Cited by 49 publications
(28 citation statements)
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“…The composite material shows no characteristic peaks of the wurtzite ZnO structure (curve 3). This observation correlates with the data of other authors on SBA-15 based composites [24,25] and can be interpreted either by the absence of ZnO in the material or as the presence of very small ZnO clusters formed inside the pores. We have ruled out the former interpretation by application of the chemical analysis method.…”
Section: X-ray Diffraction Resultssupporting
confidence: 91%
“…The composite material shows no characteristic peaks of the wurtzite ZnO structure (curve 3). This observation correlates with the data of other authors on SBA-15 based composites [24,25] and can be interpreted either by the absence of ZnO in the material or as the presence of very small ZnO clusters formed inside the pores. We have ruled out the former interpretation by application of the chemical analysis method.…”
Section: X-ray Diffraction Resultssupporting
confidence: 91%
“…2A depicts the wide-angle XRD patterns of the composites obtained at different reaction temperatures. There is only a broad peak centered at about 231 to indicate the amorphous wall structure of SBA-15 [16] but no ZnO crystalline phase on the patterns of 30ZS, mirroring the well dispersion of ZnO nanoparticles inside SBA-15 [7]. Thanks to the rich surface silanol groups along with the unique dual pore structure of SBA-15, metal oxides can be spontaneously dispersed on SBA-15 during the whole mixing-heating process, where some strong interactions occurred between the oxide species and the support [17].…”
Section: Resultsmentioning
confidence: 99%
“…Numerous papers reported the use of periodic channels of ordered mesoporous materials as micro-reactors for the synthesis of inorganic nanoparticles or containing organic species. For example, metal oxides [10][11][12] (TiO 2 , Fe 2 O 3 and CuO), semiconductors [13][14][15] (CdS, CdSe and ZnS), transition metals [16][17][18] (Au, Ag and Pt) and organic functional groups [19][20][21] have been successfully incorporated into the channels of ordered mesoporous materials. The uniform mesopore size distribution and high surface area as well as the large pore volume of ordered mesoporous materials endow the guest species with particle size reduction, unique morphology and nonagglomeration.…”
Section: Introductionmentioning
confidence: 99%