Naslov
Photoreduction in Solutions by Intense Pulsed Light

Autori
Zubak, Marko ; Krivačić, Sara ; Kassal, Petar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Solutions in Chemistry / - , 2022, 121-121

Skup
Solutions in Chemistry

Mjesto i datum
Sveti Martin na Muri, 8-11.11.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
intense pulsed light ; graphene oxide ; photo reduction ; reference electrode

Sažetak
Intense Pulsed Light (IPL) is a short pulsed flash (down to 100 µs) of a xenon lamp emitting mostly visible light (190 nm to 1100 nm), which is caused by the formation of an electric arc between high- voltage tungsten electrodes (1000 V – 3000 V). Compared to other reduction methods, IPL photoreduction does not require using reducing agents ; it is energy and time-efficient, 1 thereby meeting the requirements of sustainable development. In this study, IPL photoreduction was evaluated in two different systems (Figure 1). The first system was the dispersion of graphene oxide (GO) in water, buffer (pH= 10), ethanol, and ethanol with poly(vinyl butyral) (PVB). The purpose of the experiment was to determine the influence of the dispersing agent on photoreduction and to define the optimal parameters of the IPL system that provide a highquality product. Additionally, the dispersion stability of the product was evaluated. The degree of reduction was verified by UV/Vis spectrophotometry ; the largest degree of reduction and most stable dispersion was found in the buffer (pH= 10). The second system was a methanol solution of AgCl and NaCl in the PVB polymer matrix. IPL partial photoreduction was performed at mild IPL parameters. Silver nanoparticles were formed, as evidenced by the peak at 420 nm in the UV/Vis spectra ; with the excess of AgCl and NaCl still present in the PVB matrix. The obtained polymer- inorganic salts hybrid was used as a reference membrane (RM) in a proof-of-concept experiment for the development of a planar all-solidstate reference electrode. The RM has shown a great capability of ensuring potential stability in Cl– and NO3– containing solutions, as well as in a broad pH range.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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