Abstract
Sonocatalytic degradation of organic pollutants provides a green and sustainable strategy in industrial production. In this study, new cylinder hybrid particles were successfully prepared by the hydrothermal synthesis and carbonization decomposition of MIL-125(Ti). The porous carbon (PC) component with graphite-like structure was derived from the organic linker, and the TiO2 component containing Ti3+ and oxygen vacancies was generated by O-Ti-O species. Because a large amount of organic skeleton remained, PC@TiO2 still had a large specific surface area with many pore sizes. Compared with MIL-125(Ti) and pure TiO2, PC@TiO2 had a lower band gap owing to the exposure of O-Ti-O species and the output of Ti3+ and oxygen vacancy. PC@TiO2 showed an excellent degradation activity, and its removal rate to organic dye Rhodamine B (RhB) could reach almost 100 % under ultrasound irradiation within 60 min. By the dynamics and thermodynamics analysis, an adsorption/sonocatalytic mechanism was proposed to cover the degradation. Thus, the PC@TiO2 will have attractive potential to apply in the degradation of industrial organic dyes.
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