Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 412, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.125245
Keywords
Sonophotocatalysis; Organic pollutants; Degradation; Photocatalysis; 2D materials
Categories
Funding
- National Research Foundation of Korea (NRF) [2019R1A2C1009871, 2019H1D3A1A01071209, 2020R1I1A1A01065748]
- Korea Basic Science Institute (National research Facilities and Equipment Center) - Ministry of Education [2019R1A6C1010042]
- National Research Foundation of Korea [2020R1I1A1A01065748, 2019R1A2C1009871, 2019H1D3A1A01071209] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Significant industrial advancements have led to the release of toxic pollutants into the environment, necessitating efficient wastewater treatment processes to reduce contamination. Photocatalytic degradation is considered effective, but has limitations. Combining sonolysis with photocatalysis shows benefits for environmental remediation by utilizing more active radicals to degrade organic pollutants.
Significant advances in various industrial processes have resulted in the discharge of toxic pollutants into the environment. Consequently, it is essential to develop efficient wastewater treatment processes to reduce water contamination and increase recycling/reuse. Photocatalytic degradation is considered as an efficient method for the degradation of toxic pollutants in industrial wastewater. However, the use of photocatalytic approaches is associated with numerous limitations, such as lengthy procedures and the necessity for large amounts of catalysts. Hence, it has been proposed that photocatalysis could be combined with other techniques, including sonolysis, electrochemical, photothermal, microwave, ultrafiltration, and biological reactor. The integration of photocatalysis with sonolysis could be remarkably beneficial for environmental remediation. The combination of these processes has the advantages of using uniformly dispersed catalysts, regeneration of the catalyst surface, improved mass transfer, enhanced surface area due to smaller catalyst particles, and production of more active radicals for the degradation of organic pollutants. In this review, an overview on employing sonophotocatalysis for the removal of toxic organic contaminants from aqueous environments is provided. Additionally, the limitations of photocatalysis alone and the fundamental sonophotocatalytic mechanistic pathways are discussed. The importance of utilizing advanced two-dimensional (2D) semiconductor materials in sonophotocatalysis and the common synthetic approaches for the preparation of 2D materials are also highlighted. Lastly, the review provides comprehensive insights into different materials based on metal oxides, chalcogenides, graphene, and metal organic frameworks (MOFs), which are involved in sonophotocatalytic processes employed for the remediation of environmental pollutants.
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