Ibuprofen Photodegradation by Ag2O and Ag/Ag2O Composites Under Simulated Visible Light Irradiation

Villavicencio, Montserrat Padilla; Escobedo-Morales, A.; Peralta, Ma. de Lourdes Ruiz; Sánchez‐Cantú, Manuel; Rojas-Blanco, L.; Anota, E. Chigo; Camacho-García, J H; Tzompantzi, Francisco

doi:10.1007/s10562-020-03139-6

Cited by 33 publications

(15 citation statements)

References 64 publications

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“…Meanwhile, the peaks at 937.5–948.5 and 955.5–967.5 eV can be due to the broad satellite peaks . Two strong peaks for Ag 3d 5/2 and Ag 3d 3/2 in CuAg alloy before and after composition with CdS are detected and shown in Figure d . As shown in the deconvolution results, there are two additional peaks, which evidently indicate the coexistence of different Ag bonds including Ag–O and Ag–Cu in the alloy.…”

Section: Resultsmentioning

confidence: 84%

Bimetallic CuAg Alloyed Nanoparticles Anchored on CdS Nanorods for the Photocatalytic Degradation of Enrofloxacin

Rahmani

Mahjoub

Khazaee

2023

ACS Appl. Nano Mater.

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The photocatalytic degradation of resistant antibiotics based on bimetallic alloys is considered an influential way for waste water treatment. In this work, nanoparticles of a CuAg bimetallic alloy are synthesized on the surface of CdS nanorods (NRs), which were employed as co-catalysts. The successful reduction of Cu and Ag ions via chemical reduction and the intimate contact between the alloy and NRs are investigated using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared, energy-dispersive X-ray spectroscopy, ultraviolet−vis, and photoluminescence spectra. Anchoring of the CuAg alloy nanoparticles with CdS NRs has been proved to be due to the formation of Cu−S and Ag−S bonds, resulting in exceptional enhancement in the photocatalytic activity of CdS for removal of the enrofloxacin antibiotic. Bimetallic alloy nanoparticles of CuAg exhibit an enhancement of three times in the photocatalytic activity of the pristine CdS. Due to the synergistic effect between surface plasmon resonance light absorption of the CuAg alloy and the provided unique charge mobility channel in alloy−sulfur bonds on the surface, a Z-scheme pathway for photochemical transformations is proposed. A rate constant of 0.091 min −1 and an activation energy of 0.183 kJ mol −1 have been obtained from the CdS/CuAg photocatalyst under visible light, indicating remarkable catalytic activity. The CdS/CuAg system containing an alloy−sulfur bridge is reported in photocatalytic degradation for the first time, which is expected to shed light on research for the development of noble metal-based heterogeneous photocatalysts.

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Section: Resultsmentioning

confidence: 84%

Bimetallic CuAg Alloyed Nanoparticles Anchored on CdS Nanorods for the Photocatalytic Degradation of Enrofloxacin

Rahmani

Mahjoub

Khazaee

2023

ACS Appl. Nano Mater.

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“…The DMPO/ · OH spin adduct may be due to a direct formation process involving hydroxyl radicals or a secondary formation process involving superoxide radicals [ 88 ]. This may be another reason for the composites to degrade more MB than IBP and DIC; · OH radicals are the main species derived from the degradation of MB, whereas in · O 2 − radicals play a key role an important role in the degradation of NSAIDs [ 34 , 89 ].…”

Section: Discussionmentioning

confidence: 99%

Post-synthetic modification of aluminum trimesate and copper trimesate with TiO2 nanoparticles for photocatalytic applications

et al. 2022

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Organic pollutants have been a significant source of concern in recent years due to their facile dissemination and harmful effects. In this work, two different metal–organic frameworks (MOFs) were initially prepared by hydrothermal treatment, namely aluminum trimesate (MIL-100(Al)) and copper trimesate (HKUST-1). These materials were subsequently submitted to a post-synthetic modification step to grow titania nanoparticles on their surface. Anatase nanoparticles with sizes around 5 nm were successfully anchored on MIL-100(Al), and the concentration of TiO 2 in this sample was about 68 wt.%. This is the first time that this composite (TiO 2 @MIL-100(Al)) is reported in the literature. It showed an improved photocatalytic activity, removing 90% of methylene blue ( k app = 1.29 h −1 ), 55% of sodium diclofenac ( k app = 0.21 h −1 ), and 62% of ibuprofen ( k app = 0.37 h −1 ) after four hours of illumination with UV-A light. A significant concentration (14 µM) of reactive oxygen species (ROS) was detected for this composite. HKUST-1 showed a structural collapse during its post-synthetic modification, leading to a non-porous material and providing fewer sites for the heterogeneous nucleation of titania. This behavior led to a low concentration of rutile nanoparticles on HKUST-1 (9 wt.%). However, the obtained composite (TiO 2 @HKUST) also showed an improved photoactivity compared to HKUST-1, increasing the photodegradation rates evaluated for methylene blue (0.05 h −1 vs. 0.29 h −1 ), sodium diclofenac (negligible vs. 0.03 h −1 ), and ibuprofen (0.01 h −1 vs. 0.02 h −1 ). This work brings new insights concerning the preparation of photocatalysts by growing semiconductor nanoparticles on trimesate-based MOFs.

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“…An important parameter in photocatalysis efficiency is the catalyst dosage. At higher catalyst dosages, a screening effect due to prevention of light penetration could occur resulting in decreased photocatalytic efficiency (Padilla Villavicencio et al 2020).…”

Section: Principle Of Nanogold-composite Catalytic Effectmentioning

confidence: 99%

Effective and reproducible biosynthesis of nanogold-composite catalyst for paracetamol oxidation

Krbečková

Šimonová

Langer

et al. 2022

Environ Sci Pollut Res

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Pharmaceutical products are some of the most serious emergent pollutants in the environment, especially nowadays of the COVID-19 pandemic. In this study, nanogold-composite was prepared, and its catalytic activity for paracetamol degradation was investigated. Moreover, for the first time, recycled waste diatomite earth (WDE) from beer filtration was used for reproducible gold nanoparticle (Au NPs) preparation. We studied Au NPs by various psychical-chemical and analytical methods. Transmission and scanning electron microscopy were used for nanogold-composite morphology, size and shape characterization. Total element concentrations were determined using inductively coupled plasma mass and X-ray fluorescence spectrometry. X-ray powder diffraction analysis was used for crystal structure characterization of samples. Fourier transform infrared spectrometer was used to study the chemical changes before and after Au NP formation. The results revealed that the WDE served as both a reducing and a stabilizing agent for crystalline spherical 30 nm Au NPs as well as acting as a direct support matrix. The kinetics of paracetamol degradation was studied by high-performance liquid chromatography with a photodiode array detector. The conversion of paracetamol was 62% and 67% after 72 h in the absence or presence of light irradiation, respectively, with 0.0126 h −1 and 0.0148 h −1 reaction rate constants. The presented study demonstrates the successful use of waste material from the food industry for nanogold-composite preparation and its application as a promising catalyst in paracetamol removal. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s11356-022-21868-6.

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Ibuprofen Photodegradation by Ag2O and Ag/Ag2O Composites Under Simulated Visible Light Irradiation

Cited by 33 publications

References 64 publications

Bimetallic CuAg Alloyed Nanoparticles Anchored on CdS Nanorods for the Photocatalytic Degradation of Enrofloxacin

Bimetallic CuAg Alloyed Nanoparticles Anchored on CdS Nanorods for the Photocatalytic Degradation of Enrofloxacin

Post-synthetic modification of aluminum trimesate and copper trimesate with TiO2 nanoparticles for photocatalytic applications

Effective and reproducible biosynthesis of nanogold-composite catalyst for paracetamol oxidation

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