Transition metal doped Sb@SnO2 nanoparticles for photochemical and electrochemical oxidation of cysteine

Yeonwoo Kim, Sena Yang, Yeji Kang, Byung Kwon Kim, Hangil Lee

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Transition metal-doped SnO2 nanoparticles (TM-SnO2) were synthesized by applying a thermos-synthesis method, which first involved doping SnO2 with Sb and then with transition metals (TM = Cr, Mn, Fe, or Co) of various concentrations to enhance a catalytic effect of SnO2. The doped particles were then analyzed by using various surface analysis techniques such as transmission electron microscopy (TEM), X-ray diffraction (XRD), scanning transmission X-ray microscopy (STXM), and high-resolution photoemission spectroscopy (HRPES). We evaluated the catalytic effects of these doped particles on the oxidation of L-cysteine (Cys) in aqueous solution by taking electrochemical measurements and on the photocatalytic oxidation of Cys by using HRPES under UV illumination. Through the spectral analysis, we found that the Cr- and Mn-doped SnO2 nanoparticles exhibit enhanced catalytic activities, which according to the various surface analyses were due to the effects of the sizes of the particles and electronegativity differences between the dopant metal and SnO2.

Original languageEnglish
Article number12348
JournalScientific Reports
Volume8
Issue number1
DOIs
StatePublished - 1 Dec 2018

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