Photo-oxidative Decolorization of Brilliant Blue with AgNPs as an Activator in the Presence of K2S2O8 and NaBH4

Occupational radiation exposure monitoring is well-established in clinical or industrial environments with various different dosimeter systems. Despite the availability of many dosimetry methods and devices, a challenge with the occasional exposure registration, which may occur due to the spilling of radioactive materials or splitting of these materials in the environment, still exists, because not every individual will have an appropriate dosimeter at the time of the irradiation event. The aim of this work was to develop radiation-sensitive films—color-changing radiation indicators, which can be attached to or integrated in the textile. Polyvinyl alcohol (PVA)-based polymer hydrogels were used as a basis for fabrication of radiation indicator films. Several organic dyes (brilliant carmosine (BC), brilliant scarlet (BS), methylene red (MR), brilliant green (BG), brilliant blue (BB), methylene blue (MB) and xylenol orange (XiO)) were used as a coloring additives. Moreover, PVA films enriched with Ag nanoparticles (PVA-Ag) were investigated. In order to assess the radiation sensitivity of the produced films, experimental samples were irradiated in a linear accelerator with 6 MeV X-ray photons and the radiation sensitivity of irradiated films was evaluated using UV–Vis spectrophotometry method. The most sensitive were PVA-BB films indicating 0.4 Gy−1 sensitivity in low-dose (0–1 or 2 Gy) range. The sensitivity at higher doses was modest. These PVA-dye films were sensitive enough to detect doses up to 10 Gy and PVA-MR film indicated stable 33.3% decolorization after irradiation at this dose. It was found that the dose sensitivity of all PVA-Ag gel films varied from 0.068 to 0.11 Gy−1 and was dependent on the Ag additives concentration. Exchange of a small amount of water with ethanol or isopropanol caused the enhancement of radiation sensitivity in the films with the lowest AgNO3 concentration. Radiation-induced color change of AgPVA films varied between 30 and 40%. Performed research demonstrated the potential of colored hydrogel films in their applications as indicators for the assessment of the occasional radiation exposure.

show abstract

“…The decrease in UV–Vis absorbance might be caused by oxidative degradation of BB and generation of reactive oxidants

and OH ● . Further reactions with these oxidants lead to the cleavage of benzene rings into the smaller organic molecules [ 45 , 46 ].…”

Section: Discussionmentioning

confidence: 99%

Investigation of Colored Film Indicators for the Assessment of the Occasional Radiation Exposure

Kudrevičius

Adlienė

Puišo

et al. 2023

Gels

View full text Add to dashboard Cite

show abstract

“…Volumetric flow rates tested were 1, 1.5, 2, 5, and 10 µL/min. To study mixing efficiency, a solution of Brilliant Blue FCF (to aid in visualization) was dissolved in PBS for a final concentration of 25 μM (measured via Beer-Lambert Law) 23 and used in combination with plain PBS to determine the performance of the micromixers. Using an inverted microscope (Zeiss, Axiovert 200 M, Oberkochen Germany) at 5X magnification, images were captured at three regions—entrance, middle, and exit—of the micromixers during perfusion (Fig.…”

Section: Methodsmentioning

confidence: 99%

Hydrogel-based microfluidic device with multiplexed 3D in vitro cell culture

Clancy

Chen

Bruns

et al. 2022

Sci Rep

View full text Add to dashboard Cite

Microfluidic devices that combine an extracellular matrix environment, cells, and physiologically relevant perfusion, are advantageous as cell culture platforms. We developed a hydrogel-based, microfluidic cell culture platform by loading polyethylene glycol (PEG) hydrogel-encapsulated U87 glioblastoma cells into membrane-capped wells in polydimethyl siloxane (PDMS). The multilayer microfluidic cell culture system combines previously reported design features in a configuration that loads and biomimetically perfuses a 2D array of cell culture chambers. One dimension of the array is fed by a microfluidic concentration gradient generator (MCGG) while the orthogonal dimension provides loading channels that fill rows of cell culture chambers in a separate layer. In contrast to typical tree-like MCGG mixers, a fractional serial dilution of 1, ½, ¼, and 0 of the initial solute concentration is achieved by tailoring the input microchannel widths. Hydrogels are efficiently and reproducibly loaded in all wells and cells are evenly distributed throughout the hydrogel, maintaining > 90% viability for up to 4 days. In a drug screening assay, diffusion of temozolomide and carmustine to hydrogel-encapsulated U87 cells from the perfusion solution is measured, and dose–response curves are generated, demonstrating utility as an in vitro mimic of the glioblastoma microenvironment.

show abstract

“…This colour might indicate the formation of instantaneous Cu2-xSx, which turned into more stable olive-green colour CuS upon thermal treatment. The possible reaction mechanism was given below in equation (2)(3)(4)(5). Figure 1 shows the optical property, crystalline structure evaluation and surface functional groups present in the as-synthesized BSA-CuS NPs.…”

Section: Characterizations Of As-synthesized Bsa Encapsulated Cus Npsmentioning

confidence: 99%

“…3 In general, ROS are the non-selective and highly reactive species produced in fenton by the decomposition of hydrogen peroxide (H2O2) which are capable of oxidizing various unsaturated organic contaminants. 4 Although, there were examples where NaBH4 was used as a reducing agent [5][6][7] for other degradation processes, H2O2 remained the obvious choice due to their non-toxic, efficient, cost-effective nature. Fe-fenton (AOP with Fe catalyst and H2O2), Fephotofenton system (AOP with Fe catalyst, H2O2, UV light) are the widely known systems.…”

Section: Introductionmentioning

confidence: 99%

Protein Encapsulated Covellite CuS Nanospheres for the Efficient Oxidative Degradation of Organic Dyes in Wastewater

Bandaru

Sen

Pramanik

et al. 2022

Preprint

View full text Add to dashboard Cite

The existence of toxic, non-biodegradable organic pollutants in wastewater has become an indisputable and global remark for environmental problem. Interesting works have been performed on engineering/designing novel nano-catalyst to replace well-known Fe-fenton system in the degradation of such pollutants where the residual iron limits their wide application. Alternatively, Cu based materials have been explored in waste-water management mainly due to their ease of availability, cost-effectiveness, and efficient oxidative catalytic activity. However, synthesis of such pure phase water-soluble monodispersed Cu-based nanoparticles is challenging. In this study, we reported the synthesis of monodispersed covellite bovine serum albumin functionalized - copper sulfide (BSA-CuS) nanoparticles by simple thermal decomposition process. As-synthesized nanoparticles were characterized through advanced techniques such as UV-Visible spectra, XRD, FT-IR, HR-TEM and XPS. Finally, their potential for enhanced oxidative catalytic performance was investigated through experimental and theoretical studies for the degradation of wide range of dyes such as anionic dye, cationic dye, and industry effluent, which are commonly present in wastewater as contaminant.

show abstract

Photo-oxidative Decolorization of Brilliant Blue with AgNPs as an Activator in the Presence of K₂S₂O₈ and NaBH₄

Cited by 35 publications

References 68 publications

Investigation of Colored Film Indicators for the Assessment of the Occasional Radiation Exposure

Investigation of Colored Film Indicators for the Assessment of the Occasional Radiation Exposure

Hydrogel-based microfluidic device with multiplexed 3D in vitro cell culture

Protein Encapsulated Covellite CuS Nanospheres for the Efficient Oxidative Degradation of Organic Dyes in Wastewater

Contact Info

Product

Resources

About