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Sonophotocatalysis with Photoactive Nanomaterials for Wastewater Treatment and Bacteria Disinfection

期刊

ACS NANOSCIENCE AU
卷 3, 期 2, 页码 103-129

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsnanoscienceau.2c00058

关键词

sonophotocatalysis; nanomaterials; degradation; wastewater treatment; cavitation bubbles; sonoluminescence; sonophotocatalytic mechanisms; bacteria disinfection

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Sonophotocatalysis, a combination of photocatalysis and sonocatalysis, has shown great potential in wastewater treatment and bacteria disinfection. By analyzing the effect of catalyst and process modification techniques, this review explores the synergistic effect between the two processes and the importance of reactor design and energy consumption in practical applications. The application of sonophotocatalysis in bacteria disinfection is also discussed, along with suggestions for further improvement and scale-up of this technology.
Sonophotocatalysis is described as a combination of two individual processes of photocatalysis and sonocatalysis. It has proven to be highly promising in degrading dissolved contaminants in wastewaters as well as bacteria disinfection applications. It eliminates some of the main disadvantages observed in each individual technique such as high costs, sluggish activity, and prolonged reaction times. The review has accomplished a critical analysis of sonophotocatalytic reaction mechanisms and the effect of the nanostructured catalyst and process modification techniques on the sonophotocatalytic performance. The synergistic effect between the mentioned processes, reactor design, and the electrical energy consumption has been discussed due to their importance when implementing this novel technology in practical applications, such as real industrial or municipal wastewater treatment plants. The utilization of sonophotocatalysis in disinfection and inactivation of bacteria has also been reviewed. In addition, we further suggest improvements to promote this technology from the lab-scale to large-scale applications. We hope this up-to-date review will advance future research in this field and push this technology toward widespread adoption and commercialization.

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