TY - JOUR
T1 - Fabrication and characterization of ternary sepiolite/g-C3N4/Pd composites for improvement of photocatalytic degradation of ciprofloxacin under visible light irradiation
AU - Chuaicham, Chitiphon
AU - Pawar, Radheshyam Rama
AU - Karthikeyan, Sekar
AU - Ohtani, Bunsho
AU - Sasaki, Keiko
N1 - Funding Information:
This work was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number JP17F17355 and JP18F18387 , Cooperative Research Programs at Hokkaido University Institute for Catalysis (Nos. 18A1001 , 19B1002 and 20A1001 ) and “Progress 100” (World Premium International Researcher Invitation Program) in Kyushu University through operating expense grants of the Ministry of Education, Culture, Sports, Science and Technology . This work was partly supported by Nanotechnology Platform Program (Molecule and Material Synthesis) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. TEM-EDX performed at the Ultra-microscopy Research Centre (URC) at Kyushu University
Funding Information:
This work was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number JP17F17355 and JP18F18387, Cooperative Research Programs at Hokkaido University Institute for Catalysis (Nos. 18A1001, 19B1002 and 20A1001) and “Progress 100” (World Premium International Researcher Invitation Program) in Kyushu University through operating expense grants of the Ministry of Education, Culture, Sports, Science and Technology. This work was partly supported by Nanotechnology Platform Program (Molecule and Material Synthesis) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. TEM-EDX performed at the Ultra-microscopy Research Centre (URC) at Kyushu University
Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - The development of high-quality photocatalytic materials for the degradation of organic pollutants under visible light irradiation is a vital field of research. In the present study, a composite of natural sepiolite clay and synthetic graphitic carbon nitride (CN) mixed with dispersed palladium nanoparticles was developed for the efficient photocatalytic degradation of ciprofloxacin (CIP) under visible light irradiation. The sepiolite, CN, and composite materials were characterized by several techniques. The sepiolite/CN composite (SC30%) displayed superior activity than pristine sepiolite and CN, resulted from the generation of new electron trap states in the interfacial contract between sepiolite and CN to suppress the charge recombination of CN. Furthermore, the well-dispersed of 1 wt% Pd-nanoparticles in the SC30% composite collectively enhanced CIP degradation by avoiding the recombination of photogenerated electrons and holes. Additionally, the electron trap states on the surface of all samples were studied using novel reversed double-beam photoacoustic spectroscopy to understand electron transfer in the composites related to the photocatalytic degradation mechanism of CIP. The developed sepiolite/CN/Pd(0) composite can act as a potential catalyst for the degradation of organic pollutants in wastewater under visible light irradiation.
AB - The development of high-quality photocatalytic materials for the degradation of organic pollutants under visible light irradiation is a vital field of research. In the present study, a composite of natural sepiolite clay and synthetic graphitic carbon nitride (CN) mixed with dispersed palladium nanoparticles was developed for the efficient photocatalytic degradation of ciprofloxacin (CIP) under visible light irradiation. The sepiolite, CN, and composite materials were characterized by several techniques. The sepiolite/CN composite (SC30%) displayed superior activity than pristine sepiolite and CN, resulted from the generation of new electron trap states in the interfacial contract between sepiolite and CN to suppress the charge recombination of CN. Furthermore, the well-dispersed of 1 wt% Pd-nanoparticles in the SC30% composite collectively enhanced CIP degradation by avoiding the recombination of photogenerated electrons and holes. Additionally, the electron trap states on the surface of all samples were studied using novel reversed double-beam photoacoustic spectroscopy to understand electron transfer in the composites related to the photocatalytic degradation mechanism of CIP. The developed sepiolite/CN/Pd(0) composite can act as a potential catalyst for the degradation of organic pollutants in wastewater under visible light irradiation.
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U2 - 10.1016/j.jcis.2020.05.064
DO - 10.1016/j.jcis.2020.05.064
M3 - Article
C2 - 32502666
AN - SCOPUS:85085642619
SN - 0021-9797
VL - 577
SP - 397
EP - 405
JO - Journal of Colloid And Interface Science
JF - Journal of Colloid And Interface Science
ER -