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Synthesis and Optical Property of ZnO/SiO2 Nanocomposite Cryogels
Su, Lifen1; Miao, Lei2; Zhang, Ming3; Qian, Jiasheng1; Xia, Ru1; Yang, Bin1; Chen, Peng1
AbstractIn this paper, ZnO cryogels with a dopant of SiO2 with molar ratio of 9:1 to 1:1 were prepared by sol-gel technology and dried by a novel vacuum freeze drying using a co-precursor method. The as-prepared ZnO/SiO2 nanocomposites were annealed in air at 250, 500 and 800 degrees C for 45 min, respectively. The structure and morphology of the nanocomposites were determined by X-ray diffraction (XRD) and field emission scanning electron microscopy. The optical properties were estimated not only by UV-visible spectrometer but also theoretical calculation. The annealed nanocomposites exhibited hexagonal Wurtzite structure ZnO and whose crystallinity became better as an increase of annealing temperature. The amounts of doping SiO2 affect the optical band gaps and morphology of ZnO/SiO2 nanocomposites significantly. After annealing, the obtained ZnO nanorods grow up in size from the SEM images with annealing temperature ranging from 250 to 500 degrees C and flowerlike ZnO was formed with tetragonal pillars at 800 degrees C.
KeywordOptical Band Gap Zno/sio2 Nanocomposites Cryogels Co-precursor Method
WOS HeadingsScience & Technology ; Physical Sciences
WOS Subject ExtendedChemistry
Indexed BySCI
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000335836800001
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Anhui Univ, Anhui Prov Key Lab Environm Friendly Polymer Mat, Coll Chem & Chem Engn, Hefei 230601, Peoples R China
2.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
3.Yokohama Natl Univ, Dept Phys, Grad Sch Engn, Yokohama, Kanagawa 2408501, Japan
Recommended Citation
GB/T 7714
Su, Lifen,Miao, Lei,Zhang, Ming,et al. Synthesis and Optical Property of ZnO/SiO2 Nanocomposite Cryogels[J]. ASIAN JOURNAL OF CHEMISTRY,2014,26(5):1257-1260.
APA Su, Lifen.,Miao, Lei.,Zhang, Ming.,Qian, Jiasheng.,Xia, Ru.,...&Chen, Peng.(2014).Synthesis and Optical Property of ZnO/SiO2 Nanocomposite Cryogels.ASIAN JOURNAL OF CHEMISTRY,26(5),1257-1260.
MLA Su, Lifen,et al."Synthesis and Optical Property of ZnO/SiO2 Nanocomposite Cryogels".ASIAN JOURNAL OF CHEMISTRY 26.5(2014):1257-1260.
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