Abstract
The present research centered on the fabrication of halogen (F and Cl) doping g-C3N4 modified ZnAl-LDH (FCCN/LDH) nanohybrids and its application in the photodegradation of tetracycline (TC) in artificial seawater. Halogen doping g-C3N4 was prepared via hydrothermal and thermal polycondensation methods using melamine as the precursor. Heterostructural FCCN/LDH binary nanocomposites were synthesized by a facile co-precipitation process. The morphological analysis of binary heterojunction exhibited uniformed decoration of FCCN on the LDH nanosheet surface. FCCN/LDH hybrid displayed enhanced photocatalytic degradation efficiency in the artificial seawater compared with pure FCCN and LDH, which is attributed to appropriate band alignment and Z-scheme electron-hole pairs transfer mechanism to suppress the recombination of photogenerated charge carriers. Electrochemical properties and PL results confirmed the proposed mechanism for extended visible-light response range over FCCN/LDH nanocomposites. Finally, the degradation efficiency of other pollutants (MB, MO, CIP, Rh B, and Cr(VI)) and the photocatalytic stability over FCCN/LDH nanocomposites in the seawater system were also reconnoitered. The plausible Z-scheme mechanism signposted that h+ and O2– active species are foremost free radicals that play a pivotal role in photodegradation.
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