The double role of p-toluenesulfonic acid in the formation of ZnO particles with different morphologies

被引:22
作者
Ambrozic, Gabriela [1 ]
Djerdj, Igor [2 ,3 ]
Skapin, Sreco D. [4 ]
Zigon, Majda [1 ]
Orel, Zorica Crnjak [1 ]
机构
[1] Natl Inst Chem, SI-1000 Ljubljana, Slovenia
[2] Rudjer Boskovic Inst, Zagreb 10000, Croatia
[3] ETH, Dept Mat, Lab Multifunct Mat, CH-8093 Zurich, Switzerland
[4] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia
关键词
METAL-OXIDE NANOCRYSTALS; HYDROTHERMAL SYNTHESIS; SEMICONDUCTOR; NANOTUBES; GROWTH; ROUTE;
D O I
10.1039/b924412n
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The role of p-toluenesulfonic acid (p-TSA) as a catalyst and/or morphology-directing agent for the formation of ZnO particles with different sizes (20 to 250 nm) and shapes (from bullet-like to complex, cauliflower architectures) was studied. One-pot, low-temperature syntheses were performed using reaction mixtures containing zinc acetylacetonate hydrate (zinc oxide precursor), 1-butanol (medium and oxygen source) and different concentrations of p-TSA. The catalytic role of the p-TSA was pronounced when the p-TSA concentration was kept low, while an elevated acid concentration inhibits the reactivity of the ZnO precursor toward the alcoholysis, presumably due to the adhesion of the p-TSA on its surface. The abundance of ZnO surface chelation with the p-TSA controls the ZnO particle growth and shape as well as the self-assembly of ZnO nanocrystals into complex architectures. The particles' characterization and growth were assessed using TEM, HRTEM, FE-SEM, XRD and FTIR, while the reaction mechanism was proposed on the basis of C-13 and H-1 NMR experiments.
引用
收藏
页码:1862 / 1868
页数:7
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