In Situ Coupling Carbon Defective C<sub>3</sub>N<sub>5</sub> Nanosheet with Ag<sub>2</sub>CO<sub>3</sub> for Effective Degradation of Methylene Blue and Tetracycline Hydrochloride
Guoyu Li,
Genying Zeng,
Zhangkai Chen,
Jiaming Hong,
Xiaodong Ji,
Zhiqiang Lan,
Xiaofei Tan,
Meifang Li,
Xinjiang Hu,
Chunfang Tang
Affiliations
Guoyu Li
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Genying Zeng
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Zhangkai Chen
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Jiaming Hong
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Xiaodong Ji
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Zhiqiang Lan
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Xiaofei Tan
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Meifang Li
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Xinjiang Hu
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Chunfang Tang
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
The development of novel catalysts for degrading organic contaminants in water is a current hot topic in photocatalysis research for environmental protection. In this study, C3N5 nanosheet/Ag2CO3 nanocomposites (CNAC-X) were used as efficient photocatalysts for the visible-light-driven degradation of methylene blue (MB), and tetracycline hydrochloride (TC-HCl) was synthesized for the first time using a simple thermal oxidative exfoliation and in situ deposition method. Due to the synergistic effect of nanosheet structures, carbon defects, and Z-scheme heterojunctions, CNAC-10 exhibited the highest photocatalytic activity, with photodegradation efficiencies of 96.5% and 97.6% for MB (60 mg/L) and TC-HCl (50 mg/L) within 90 and 100 min, respectively. The radical trapping experiments showed that ·O2− and h+ played major roles in the photocatalytic effect of the CNAC-10 system. Furthermore, intermediates in the photodegradation of MB and TC-HCl were investigated to determine possible mineralization pathways. The results indicated that C3N5 nanosheet/Ag2CO3 photocatalysts prepared in this work could provide an effective reference for the treatment of organic wastewater.
