In:
Materials Research Express, IOP Publishing, Vol. 10, No. 5 ( 2023-05-01), p. 055503-
Abstract:
In this work, we successfully synthesized a TiO 2 -PAA-GO hydrogel photocatalyst (GO: graphene oxide; PAA: poly acrylic acid) using a hydrothermal method. The XRD, FTIR, SEM, and XPS results demonstrated the formation of cross-link bond within the TiO 2 , GO, and PAA nanocomposite. TiO 2 nanomaterials, with a particle size of approximately 5 nm, were uniformly distributed on GO layer, and have a high surface area (156 m 2 g −1 ). We then applied the TiO 2 -PAA-GO composite to remove direct blue 71 (DB-71) from water, achieving up to 98.16% removal. This success was due to (i) the reduction in bandgap energy, (ii) reduced electron and hole recombination, (iii) increased output of generated electrons, and (iv) high specific surface area. We also investigated the efficiency of DB-71 degradation, considering the initial concentration of DB-71, pH, contact time, catalyst mass, and the role of reactive radicals. After six reaction cycles, over 95% of the DB-71 was removed from the aqueous medium using the TiO 2 -GO-PAA photocatalyst.
Type of Medium:
Online Resource
ISSN:
2053-1591
DOI:
10.1088/2053-1591/acd325
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2023
detail.hit.zdb_id:
2760382-9
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