Preparation and properties of ZnO nanoparticles in the mesoporous silica matrix

Structure and photoluminescence of ZnO/niobate composites self-assembled from solution with different pH and contents

“…The results show that the luminescent property was enhanced [10], and at the same time, the blue-shift of UV emission and blue emission, attributed to ZnOSiO 2 interface in the silica host [7,[10][11][12][13], were observed, or a new UV-Vis absorption edge, attributed to the formation of covalent bonds between the guest ZnO and host montmorillonite, emerged [19]. In all the strategies, the control of the guest composition, particle size, size distribution, and dispersion homogeneity over the entire matrix is the critical prerequisite to assure the optical and electrical properties of the nanocomposites for nanodevice applications.…”

“…Another strategy is to embed ZnO nanoparticles in inorganic host materials such as mesoporous silica [7][8][9][10][11][12][13], zeolite [14,15], ultrahard diamond-like carbon matrix [16], layered titanate [17,18], and montmorillonite [19]. The results show that the luminescent property was enhanced [10], and at the same time, the blue-shift of UV emission and blue emission, attributed to ZnOSiO 2 interface in the silica host [7,[10][11][12][13], were observed, or a new UV-Vis absorption edge, attributed to the formation of covalent bonds between the guest ZnO and host montmorillonite, emerged [19].…”

Observation of Quantum Confinement Effect on ZnO Embedded Mesoporous Silica

“…The emission spectra of 6 However, sample MS-ZnO-0.005 shows another maximum at 3.5 eV which is typical for ZnO narrow exciton peak. Obviously exciton emission should be ascribed to ZnO nanoprticles with very low diameter which are confined in the channels of mesoprous silica.…”

“…[1][2][3][4] However, the use of the ZnO nanostructures, nanoparticles as materials is strongly restricted because of their low chemical and temperature stability which usually results in distortion of originally adjusted parameters due to aggregation processes or chemical reactions with their surroundings, limiting practical application of purely nanocrystalline systems. [5][6][7][8] Further progress for the development of novel procedures for preparation of nanostructures with predefined optical properties is necessary which is associated with enhancement of their stability and simplification of synthesis methods. [9][10][11][12] In the same time there is a possibility that accurate control of the functional properties of nanomaterial is affected by the size, shape and dispersity of nanoparticles, the number of structural defects and the uniformity of chemical composition.…”

Synthesis and Microstructural Characterization of Al2O3-SiO2-ZnO Composite

“…These oxides cause smaller sizes and promote stabilization of the surface. [7][8][9][10][11][12][13][14][15][16][17] However, there is not any focus on the preparation of Al 2 O 3 -SiO 2 -ZnO composites.…”