In this research, ZnAl₂O₄/SiO₂ as nanocatalyst was produced via modified sol–gel procedure. The X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR) were performed to confirm the structure of nanocatalyst. The particle size was around 14 nm. Moreover, esterification of phthalic anhydride by 2-ethylhexanol was done in the presence of catalytic amounts of ZnAl₂O₄/SiO₂. This heterogeneous nanocatalyst was used repeatedly, but its catalytic activity did not significantly decrease. The yield of this reaction in the presence of ZnAl₂O₄/SiO₂ as nanocatalyst was about 99.2% under the optimized conditions in 45 min of reaction time. These results show that the synthesized nanocatalyst via this method was more efficient.

在这项研究中，通过改进的溶胶-凝胶法制备了ZnAl ₂ O ₄ / SiO ₂作为纳米催化剂。进行了X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM）和傅里叶变换红外光谱（FT-IR）以确认纳米催化剂的结构。粒度为约14nm。此外，在催化量的ZnAl ₂ O ₄ / SiO ₂的存在下用2-乙基己醇酯化邻苯二甲酸酐。这种非均相纳米催化剂被重复使用，但是其催化活性并未显着降低。在ZnAl ₂ O ₄ / SiO存在下该反应的产率在优化的条件下，反应45分钟内，作为纳米催化剂的₂约为99.2％。这些结果表明，通过该方法合成的纳米催化剂更有效。