Abstract
AgI/MFeO3/g-C3N4 (M = Y, Gd, La) nano sheet–sphere–sheet photocatalysts were synthesized by a simple ultrasound-assisted hydrothermal approach. We characterized the microstructure, surface morphology, and optical absorption capacity of the obtained samples. According to the characterization results, AgI/MFeO3/g-C3N4 (M = Y, Gd, La) nano sheet–sphere–sheet photocatalysts were successfully obtained. MFeO3 nanospheres and AgI nanosheets were dispersed evenly on the surface of g-C3N4 nanosheets. AgI/MFeO3/g-C3N4 showed remarkable photocatalytic. Especially, 95% of NOF was photodegradated over AgI/LaFeO3/g-C3N4 within 3 h and the higher photocatalytic performance still remained after six cycles. Additionally, The N2 adsorption–desorption isotherms of AgI/MFeO3/g-C3N4 showed that AgI/LaFeO3/g-C3N4 possessed the highest specific surface area (79.32 m2/g). The result of scavenging experiment revealed that ·O2−, h+, and ·OH were the main roles in the photodegradation process. Benefitting from the nice energy band matching, MFeO3 acted as the center of photogenerated electrons migration and separation provided more direct electron channels. This work proposes an effective approach for the design and configuration of dual Z-scheme photocatalysts to accomplish the removal of organic contaminants based on g-C3N4.
Highlights
The second-generation synthetic fluoroquinolones antibiotic, norfloxacin (NOF), has been used extensively in medicine, agriculture, and pharmaceutical industries [1]
It can be indicated that MFeO3 was successfully synthesized according to theXRD results above
AgI/MFeO3 /g-C3 N4 (M = Y, Gd, La) composites were prepared by an ultrasound-assisted hydrothermal method
Summary
The second-generation synthetic fluoroquinolones antibiotic, norfloxacin (NOF), has been used extensively in medicine, agriculture, and pharmaceutical industries [1]. Since it is extremely difficult to biodegrade NOF by microorganisms in the water, NOF left untreated in lakes, rivers, oceans, wetlands, and groundwater, accumulates and harms the natural environment continually. Traditional wastewater treatment technologies—such as biodegradation, physical adsorption, and chemical precipitation—continue to have low effectiveness and low efficiency in removing. It is important to take measures to eliminate NOF with an updated water treatment technology that is effective and efficient. To solve the growing problems around the world caused by fossil energy shortages and environmental crises, semiconductor photocatalytic materials have been recognized as one of the most serviceable approaches [2]. It still deserved to research modified photocatalytic composites for better photoresponse, more efficient reuse retrievability, and higher photocatalytic degradation rate
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