Journal
INORGANIC CHEMISTRY COMMUNICATIONS
Volume 153, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.inoche.2023.110759
Keywords
Ciprofloxacin; CDs; ATP composite photocatalyst; Z-scheme heterojunction
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A Z-scheme CDs/Bi4O5Br2/ATP composite photocatalyst with varied proportions of CDs was synthesized using a dynamic adsorption method, which effectively lowered the recombination rate of electron-hole pairs and exhibited excellent photocatalytic degradation performance. The composite photocatalyst also demonstrated good stability and a high degradation efficiency for ciprofloxacin under simulated sunlight.
Bi4O5Br2 material exhibits excellent performance in photocatalytic degradation of antibiotics, but high recombination rate of photoexcited electron-hole pairs limits its photocatalytic activity. Attapulgite (ATP) is an excellent candidate for load type catalyst due to its larger specific surface area. As a new type of carbon-based nanomaterials, carbon dots (CDs) have important application prospects in catalysis and other fields. Herein, Zscheme CDs/Bi4O5Br2/ATP composite photocatalyst loaded with varied proportions of CDs was synthesized by dynamic adsorption method, which demonstrated excellent photocatalytic degradation performance by lowering the recombination rate of photoexcited electron-hole pairs. Ciprofloxacin degradation efficiency by 3 wt% CDs/ Bi4O5Br2/ATP can reach up to 90% within 120 min under simulated sunlight, in addition, the 3 wt% CDs/ Bi4O5Br2/ATP composite photocatalyst has good stability. As a result, our research helps to prepare highefficiency Z-scheme heterojunction and contributes to study the degradation of antibiotics in the aquatic environment.
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