@misc{10481/78349,
year = {2022},
month = {10},
url = {https://hdl.handle.net/10481/78349},
abstract = {The combination of graphitic carbon nitride and the metal-organic framework UiO-66-NH2 has been developed with the aim to enhance the photocatalytic activity of pure semiconductors. Different proportions of g-C3N4 and UiO-66-NH2 were combined. Complete characterization analysis of the resulting photocatalytic materials was conducted, including N-2 adsorption isotherms, XRD, FTIR, STEM-EDX microscopy, DRS-UV-visible, and photoluminescence. The photocatalytic activity was tested in an aqueous solution for the removal of acetaminophen as the target pollutant. From the obtained results, less than 50% of UiO-66-NH2 incorporated in the g-C3N4 structure enhanced the photocatalytic degradation rate of both bare semiconductors. Concretely, 75% of g-C3N4 in the final g-C3N4 /UiO-66-NH2 heterostructure led to the best results, i.e., complete acetaminophen elimination initially at 5 mg.L-1 in 2 h with a pseudo-first order rate constant of ca. 2 h(-1). The presence of UiO-66-NH2 in the g-C3N4 enhanced the optoelectronic properties, concretely, the separation of the photo-generated charges was improved according to photoluminescence characterization. The better photo-absorption uptake was also confirmed by the determination of the quantum efficiency values of the heterostructure if compared to either pure g-C3N4 or UiO-66-NH2. This photocatalyst with the best activity was further tested at different pH values, with the best degradation rate at a pH close to the pH(pzc) similar to 4.15 of the solid. Sequential recycling tests demonstrated that the heterostructure was stable after five cycles of use, i.e., 15 h. A high contribution of photo-generated holes in the process of the degradation of acetaminophen, followed marginally by superoxide radicals, was suggested by scavenger tests.},
organization = {University of Granada	PPJIA2019-09
PPJIA2021-34},
publisher = {MDPI},
keywords = {Photocatalysis},
keywords = {Graphitic carbon nitride},
keywords = {UiO-66-NH2},
keywords = {Water treatment},
keywords = {Acetaminophen},
title = {Boosted Activity of g-C3N4/UiO-66-NH2 Heterostructures for the Photocatalytic Degradation of Contaminants in Water},
doi = {10.3390/ijms232112871},
author = {Rodríguez Solís, Rafael and Quintana, María Alejandra and Martín Lara, María Ángeles and Pérez Muñoz, Antonio and Calero De Hoces, Francisca Mónica and Muñoz Batista, Mario Jesús},
}