Carbon Xerogel/TiO2 composites as photocatalysts for acetaminophen degradation

Cunha, Raíra da; Batista, Walker Vinícius Ferreira do Carmo; Oliveira, Hanna Leijoto de; Santos, Armando Martins dos; Reis, Patrícia Moreira dos; Borges, Keyller Bastos; Martelli, Patrícia Benedini; Furtado, Clascídia Aparecida; Gorgulho, Honória de Fátima

doi:10.1016/j.jphotochem.2021.113248

Cited by 16 publications

(1 citation statement)

References 38 publications

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“…The efficiency of the prepared composite (AC-TiO 2 ) was compared with other reported carbon-modified TiO 2 based photocatalysts [ 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ] ( Table 2 ). The data were compared under different optimization conditions, and the comparison study gave the efficiency of the materials at specific reaction conditions.…”

Section: Resultsmentioning

confidence: 99%

Design and Preparation of Biomass-Derived Activated Carbon Loaded TiO2 Photocatalyst for Photocatalytic Degradation of Reactive Red 120 and Ofloxacin

et al. 2022

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The design and development of novel photocatalysts for treating toxic substances such as industrial waste, dyes, pesticides, and pharmaceutical wastes remain a challenging task even today. To this end, a biowaste pistachio-shell-derived activated carbon (AC) loaded TiO2 (AC-TiO2) nanocomposite was fabricated and effectively utilized towards the photocatalytic degradation of toxic azo dye Reactive Red 120 (RR 120) and ofloxacin (OFL) under UV-A light. The synthesized materials were characterized for their structural and surface morphology features through various spectroscopic and microscopic techniques, including high-resolution transmission electron microscope (HR-TEM), field emission scanning electron microscope (FE-SEM) along with energy dispersive spectra (EDS), diffuse reflectance spectra (DRS), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, photoluminescence spectra (PL) and BET surface area measurements. AC-TiO2 shows enhanced photocatalytic activity compared to bare TiO2 due to the change in the bandgap energy and effective charge separation. The degradation rate of dyes was affected by the bandgap of the semiconductor, which was the result of the deposition weight percentage of AC onto the TiO2. The presence of AC influences the photocatalytic activity of AC-TiO2 composite towards RR 120 and OFL degradation. The presence of heteroatoms-enriched AC enhances the charge mobility and suppresses the electron-hole recombination in AC-TiO2 composite, which enhances the photocatalytic activity of the composite. The hybrid material AC-TiO2 composite displayed a higher photocatalytic activity against Reactive Red 120 and ofloxacin. The stability of the AC-TiO2 was tested against RR 120 dye degradation with multiple runs. GC-MS analyzed the degradation intermediates, and a suitable degradation pathway was also proposed. These results demonstrate that AC-TiO2 composite could be effectively used as an ecofriendly, cost-effective, stable, and highly efficient photocatalyst.

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Section: Resultsmentioning

confidence: 99%

Design and Preparation of Biomass-Derived Activated Carbon Loaded TiO2 Photocatalyst for Photocatalytic Degradation of Reactive Red 120 and Ofloxacin

et al. 2022

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Synergetic Combination of Carbon Xerogels, Graphene Oxide and nano‐ZnO for Aqueous and Organic Supercapacitors

Coneo‐Rodríguez,

Tesio,

Cometto

et al. 2024

Batteries & Supercaps

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Three‐dimensional carbon xerogels were synthesised via a facile approach that included the use of ZnO nanostructures both as a templating agent and as a catalyst for resorcinol–formaldehyde resin (R−F) polymerisation simultaneously. Graphene oxide (GO) served as a stabilising agent during the drying and pyrolysis processes, avoiding the collapse of structure and improving the area surface. The method enabled the as‐obtained materials to possess optimised 3D porous structures for energy‐storage devices, such as wires or spaghetti‐like structures. Also, a high BET surface area was obtained (1661 m2 g−1) without using an additional activating agent. This great surface area improved the specific capacitance compared to materials without GO (358.1 F g−1 vs 170.4 F g−1). The carbon‐containing devices derived from resorcinol‐formaldehyde resin, GO, and Zn oxide showed better performance than the devices without GO. In particular, the sample that contained 2.5 % of GO in the synthesis showed a specific capacitance of 166.6 F g−1 at 0.5 A g−1 and remained at ∼120 F g−1 at 5 A g−1 current density. Also, it showed interesting energy density values at 0.5 A g−1 (14.8 Wh kg−1) and a power density of 200.7 W kg−1. This reveals that the synthesis process made it possible to obtain composite materials with large surface areas without using a supercritical drying process. The materials can be used in supercapacitor‐type devices with high performance in aqueous electrolytes.

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