posted on 2023-12-15, 16:09authored byKai-Qi Zhang, Hong-Yan Song, Zhe An, Han Li, Jian Zhang, Yan-Ru Zhu, Zhi-Gang Chai, Xin Shu, Jing He
With the widespread use of antibiotics, water pollution
and biological
systems have become serious. There exist many challenges for their
degradation, and the key to photocatalytic degradation is the rational
design of photocatalysts and a thorough understanding of their catalytic
mechanism. In this paper, tetraphenylphosphorus chloride as a carbon
source was doped into g-C3N4, and a C doping
g-C3N4 photocatalyst (C–CN-550) was prepared
with rich porosity, high surface area, and expanded delocalization
of π-electrons. When ZnCr-LDHs were in situ formed on the C–CN-550
substrate, we constructed an efficient photocatalyst ZnCr-LDHs/C–CN-550
with highly dispersed LDHs, synergy of π-electrons, defects,
interfaces, and fully exposed active sites on the surface. Ciprofloxacin
and tetracycline hydrochloride (10 ppm) can be completely degraded
within 30 min by the ZnCr-LDHs/C–CN-550 catalyst under visible
light irradiation. Further, the synergistic mechanism was revealed
through various characterizations, which provides new ideas and strategies
for the construction of composite photocatalysts.