In order to enhance sonocatalytic oxidation of a recalcitrant organic pollutant, rhodamine B (RhB), it is necessary to study the fundamental aspects of sonocatalysis. In this study, TiO₂-incorporated nano-structured carbon (i.e., carbon nanotubes (CNTs) or graphene (GR)) composites were synthesized by coating TiO₂ on CNTs or GR of different mass percentages (0.5, 1, 5, and 10 wt%) by a facile hydrothermal method. The sonocatalytic degradation rates of RhB were examined for the effect of ultrasound (US) frequency and calcination temperature by using the prepared TiO₂-NSC composites. Since US frequency affected the sonoluminescence (SL) intensities, it was proposed that there exists a correlation between the surface area or band-gap of the sonocatalysts and the degradation kinetic constants of RhB. In addition, the reusability of TiO₂-GR composites was also investigated. Overall, the performance of TiO₂-GRs prepared by the hydrothermal method was better than that of calcined TiO₂-CNTs. Among TiO₂-GRs, 5% GR incorporated media (TiO₂-GR-5) showed the best performance. Interestingly, the kinetic constants of sonocatalysts prepared under hydrothermal conditions had a negative linear relationship with the band-gap energy for the corresponding media. Furthermore, the strongest SL intensity and highest degradation rates of RhB for both carbonaceous composites were observed at 500 kHz. The kinetic constants of calcined media decreased linearly as the specific area of the media decreased, while the band-gap energy could not be correlated with the kinetic constants. The GR combined TiO₂ composite might be a good sonocatalyst in wastewater treatment using ultrasound-based oxidation because of its high stability.

为了增强难降解有机污染物若丹明B（RhB）的声催化氧化，有必要研究声催化的基本方面。在这项研究中，通过将TiO ₂涂覆在不同质量百分比（0.5、1、5和10）的CNTs或GR上，合成了掺入TiO _2的纳米结构碳（即碳纳米管（CNT）或石墨烯（GR））复合材料。重量％）通过简便的水热法。通过使用制备的TiO ₂考察了RhB的声催化降解率对超声频率和煅烧温度的影响。-NSC复合材料。由于US频率会影响声致发光（SL）强度，因此提出在声催化剂的表面积或带隙与RhB的降解动力学常数之间存在相关性。此外，还研究了TiO ₂ -GR复合材料的可重复使用性。总体而言，水热法制备的TiO ₂ -GRs的性能优于煅烧的TiO ₂ -CNTs。在TiO ₂ -GRs中，5％GR掺入介质（TiO ₂-GR-5）表现出最佳性能。有趣的是，在水热条件下制备的声催化剂的动力学常数与相应介质的带隙能呈负线性关系。此外，两种碳质复合材料在500 kHz时观察到最强的SL强度和RhB的最高降解率。煅烧介质的动力学常数随介质比表面积的减小而线性下降，而带隙能量与动力学常数不相关。GR组合的TiO ₂复合材料具有很高的稳定性，因此在超声基氧化处理废水中可能是良好的声催化剂。