Lanthanum/titanium dioxide immobilized onto industrial waste with enhanced photocatalytic activity, and the degradation of dimethyl phthalate. (25th October 2021)

• Record Type: Journal Article
• Authors: Chen, Yi; Ran, Mengjia; Zhou, Ziyan; Han, Xinyi; Zhu, Honglin; Gu, Jinchuan
• Is Part Of: Journal of cleaner production. Volume 321(2021)
• Publication Date: 2021-10-25
• Subjects: Titanium dioxide -- Lithium silicon powder -- Photocatalysis -- Dimethyl phthalate -- Ultraviolet; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2021.129014
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Titanium dioxide (TiO2 ) is an effective photocatalyst for organic removal. However, its efficacy is hampered by the recombination of photogenerated electrons and holes. This paper presented an eco-friendly, synthetic lanthanum (La)/TiO2 supported on lithium silicon powder (L) to significantly improve photocatalysis. The results showed that 74.4% dimethyl phthalate (DMP) removal was achieved in the ultraviolet (UV)-La-TiO2 /L (LTL1) system, which was considerably higher than UV-TiO2 /L (TL) (60.1%) and UV-L (18.3%). The enhanced LTL1 photocatalysis was based on the synergic effect between TiO2 and La with L matrix. The photocatalysis efficiency was further improved by hydrogen peroxide (H2 O2 ), while the DMP removal rate reached 100% in the UV-LTL1-H2 O2 system. The DMP activation mechanisms and degradation pathways in the UV-LTL1-H2 O2 system were carefully examined, revealing that increased hydroxyl free radical (OH ) and superoxide ion radicals (O2 − ) were pivotal to the higher degradation rate. Overall, the findings suggested that LTL1 showed considerable application promise for the low-cost and eco-friendly organic removal from water. Graphical abstract: Image 1 Highlights: TiO2 photocatalytic effectiveness was significantly enhanced via supported on L. LTL1 performed outstanding photodegradation for DMP in the UV-H2 O2 system. UV-LTL1-H2 O2 systems can effectively eliminate DMP in a wide range of pH.