In the present study, a novel multifunctional Sr/Ag-TiO@rGO ternary hybrid photocatalyst was prepared facile sol-gel and hydrothermal methods. The prepared catalyst was well characterized by UV-vis, XRD, Raman, HRTEM and XPS. The synthesized composite was utilised for -NP degradation, disinfection and H generation under visible light. The Sr/Ag-TiO@rGO catalyst showed enhanced photocatalytic H evolution rate (64.3 μmol h) compared with Ag-TiO@rGO (30.1 μmol h) and TiO (no activity). Nearly complete degradation of 15 mg l -NP was achieved over Sr/Ag-TiO@rGO after 3 h, while only 66% and 5% was achieved by Ag-TiO@rGO and TiO respectively. Furthermore, TEM analysis was carried out on () before and after visible light irradiation to understand the inactivation mechanism and DNA analysis indicated no fragmentation during inactivation. Radical quantification experiments and ESR analysis suggested that ·OH and O˙ were the main ROS in the degradation and disinfection processes. The superior photocatalytic H evolution rate of Sr/Ag-TiO@rGO was attributed to the synergetic effect between the Ag, Sr and TiO components on the rGO surface. The localized SPR effect of Ag induced visible light generated charge carriers into the conduction band of the TiO and Sr which further transfer to the rGO for the reduction of H ions into H. The results suggest that Sr/Ag-TiO@rGO structures could not only induce separation and migration efficiency of charge carries, but also improve charge collection efficiency for enhanced catalytic activity. Thus, we believe that this work could provide new insights into multifunctional nanomaterials for applications in solar photocatalytic degradation of harmful organics and pathogenic bacteria with clean energy generation during wastewater treatment.
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http://dx.doi.org/10.1039/c8ra06813e | DOI Listing |
Semin Ophthalmol
January 2025
Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China.
Purposes: This meta-analysis aims to systematically analyze the efficacy of low-level red light (LRL) therapy for myopia control and prevention in children.
Methods: All the data were searched from the PubMed, EMBASE, and the Cochrane Library. The Cochrane Handbook was used to evaluate the quality of the included studies.
Photochem Photobiol Sci
January 2025
Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India.
The efficacy of photodynamic treatment (PDT) against deep-seated tumor is hindered by low penetration depth of light as well as hypoxic conditions which prevails in tumor. To overcome this limitation, Near-infrared (NIR) absorbing photosensitizers have been investigated actively. In the present study we evaluated the PDT efficacy of an NIR absorbing chlorophyll derivative 'Cycloimide Purpurin-18 (CIPp-18)' in Human Breast carcinoma (MCF-7) and cervical adenocarcinoma (Hela) cells under normoxic and hypoxic conditions.
View Article and Find Full Text PDFBiomol NMR Assign
January 2025
High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, China.
PhoCl is a photocleavable protein engineered from a green-to-red photoconvertible fluorescent protein by circular permutation, and has been used in various optogenetic applications including precise control of protein localization and activity in cells. Upon violet light illumination, PhoCl undergoes a β-elimination reaction to be cleaved at the chromophore, resulting in spontaneous dissociation into a large empty barrel and a small C-terminal peptide. However, the structural determinants and the mechanism of the PhoCl photocleavage remain elusive, hindering the further development of more robust photocleavable optogenetic tools.
View Article and Find Full Text PDFGeroscience
January 2025
National Institute On Aging, Bethesda, MD, USA.
Photobiomodulation (PBM) therapy, a non-thermal light therapy using nonionizing light sources, has shown therapeutic potential across diverse biological processes, including aging and age-associated diseases. In 2023, scientists from the National Institute on Aging (NIA) Intramural and Extramural programs convened a workshop on the topic of PBM to discuss various proposed mechanisms of PBM action, including the stimulation of mitochondrial cytochrome C oxidase, modulation of cell membrane transporters and receptors, and the activation of transforming growth factor-β1. They also reviewed potential therapeutic applications of PBM across a range of conditions, including cardiovascular disease, retinal disease, Parkinson's disease, and cognitive impairment.
View Article and Find Full Text PDFArch Dermatol Res
January 2025
Department of Dermatology, Drexel University College of Medicine, 860 1St Avenue, Suite 8B, Philadelphia, PA, 19406, USA.
UV-A exposure is a major risk factor for melanoma, nonmelanoma skin cancer, photoaging, and exacerbation of photodermatoses. Since people spend considerable time in cars daily, inadequate UV-A attenuation by car windows can significantly contribute to the onset or exacerbation of these skin diseases. Given recent market trends in the automobile industry and known impact of car windows on cumulative lifelong UV damage to the skin, there is a need to comparatively evaluate UV transmission across windows in electric vehicles (EV), hybrid vehicles (HV), and gas vehicles (GV) as well as variability based on year of manufacture and mileage to inform car manufacturers and consumers of the potential for UV exposure to the skin based on vehicle.
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