A novel hollow CoAl₂O₄ microsphere was synthesized by hydrothermal method and used to selectively convert CO₂ and CS₂ to cyclic carbonates and trithiocarbonates under the solventless condition. Various techniques such as powder X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), as well as N₂ and CO₂ adsorption measurements have been used for characterization of catalyst. The effects of reaction parameters such as temperature, time and pressure were investigated. The catalyst showed a good performance for conversion of a wide range of epoxides, giving almost satisfactory yields and high selectivity for carbonates and trithiocarbonates. In addition, the catalyst showed high stability and could be reused after regeneration at least for six times. This process also could be regarded as an efficient way for CO₂ conversion for production of valuable organic compounds.

利用水热法合成了新型空心CoAl ₂ O ₄微球，在无溶剂条件下将CO ₂和CS ₂选择性转化为环状碳酸酯和三硫代碳酸酯。各种技术，例如粉末X射线衍射（XRD），透射电子显微镜（TEM），场发射扫描电子显微镜（FESEM），能量色散X射线光谱（EDX），傅里叶变换红外光谱（FTIR）作为N ₂和CO ₂吸附测量已用于表征催化剂。研究了反应参数如温度，时间和压力的影响。该催化剂显示出良好的性能，可用于多种环氧化物的转化，可提供令人满意的收率，并且对碳酸盐和三硫代碳酸盐具有高选择性。另外，该催化剂显示出高稳定性，并且在再生后至少可以重复使用六次。该过程也可以被认为是用于转化CO ₂以生产有价值的有机化合物的有效方法。