Release time:2022-03-22  Hits:

• Indexed by:Journal paper
• First Author:Zhen Hu
• Correspondence Author:Ran Niu,Jiang Gong
• Co-author:Ning Liu,Panpan He,Huiying Bai,Liang Hao,Jiakang Min,Zifen Fan,Bingyu Chen
• Journal:Macromolecular Rapid Communications
• Included Journals:SCI
• Discipline:Engineering
• First-Level Discipline:Material Science and Engineering
• Document Type:J
• Date of Publication:2022-03-07
• Impact Factor:5.734
• Abstract:Upcycling waste plastics into advanced semiconductor photocatalysts provides a new strategy to reasonably and economically solve the huge amount of waste plastics, which however remains challenging. Herein, we synthesize carbon nitride-based donor-acceptor (D-A) conjugated copolymer by copolymerization of dicyandiamide and terephthalic acid from discarded polyethylene terephthalate (PET) using Zn(OH)2 as catalyst and template at 360–440°C. The morphology and structure of the conjugated copolymer are well regulated by the calcination temperature. The resultant conjugated copolymer exhibits merits of high light absorption and low electron-hole recombination probability. Consequently, it works excellently in the persulfate-based advanced oxidation process for visible light-driven photocatalytic degradation of tetracycline. The kinetic constant (3.4 × 10−2 min−1) is 40.5 and 2.3 times that of the conjugated copolymer system and persulfate system, respectively. Furthermore, the reactive species (including •OH, SO4•−, •O2−, 1O2 and h+) and degradation intermediates of tetracycline are analyzed to expound its degradation process. This work not only pioneers design guidelines on upcycling of waste plastics in a sustainable manner, but also provides a facile strategy to synthesize carbon nitride-based D-A conjugated copolymers for the efficient activation of persulfate-based advanced oxidation process in wastewater treatment.