Ball-Milling Preparation of La3+/TiO2 Photocatalyst and Application in Photodegradation of PVC Plastics
Source abstract
Abstract
The fact that the use of a large number of plastic products has brought serious pollution to the environment has always been the focus of global attention. The development of photocatalytic degradable plastics is one of the effective ways to solve the problem of “white pollution”. In this work, La3+ modified TiO2 nanoparticles were prepared by ball milling and characterized. La3+/TiO2 was mixed with Polyvinyl chloride (PVC) plastic to make a photodegradable composite film, and the photodegradation performance and mechanical properties of films were evaluated. The photodegradable films were characterized by infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), and scanning electron microscopy (SEM). After 30 h UV irradiation, the weight loss rate of the PVC was only 2.12%, while that of the TiO2/PVC reached 8.94%. The accelerating of the degradation rate was due to the mixing of TiO2 into PVC. As for the La3+/TiO2/PVC composite film, when the mass percentage of La3+/TiO2 was 1.5%, the weight loss rate of La3+/TiO2/PVC sample reached a maximum of 17.78%, which was eight times the degradation rate of PVC and two times the degradation rate of TiO2/PVC. The La3+/TiO2/PVC film showed good photodegradability. La is a transition metal element with a special 4f electronic structure. The reaction mechanism of photodegradation of PVC by the interaction of La3+ and TiO2 were discussed.
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Research context
OpenAlex topics: Microplastics and Plastic Pollution · TiO2 Photocatalysis and Solar Cells · Nanoparticles: synthesis and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Water Pollution Treatment & Resource Reuse, Hainan Normal University, Haikou 571158, China
College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
Funding
the National Natural Science Foundation of China · the Hainan Provincial Natural Science Foundation of China · the Scientific Research Project of Higher Education of Hainan Province · the Graduate Innovative Research Project of Hainan Province
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