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Photocatalytic and Photoelectrochemical Degradation of Organic Compounds with All-Inorganic Metal Halide Perovskite Quantum Dots
journal contribution
posted on 2019-01-23, 00:00 authored by Drialys Cardenas-Morcoso, Andrés F. Gualdrón-Reyes, Ana Beatriz Ferreira Vitoreti, Miguel García-Tecedor, Seog Joon Yoon, Mauricio Solis de la Fuente, Iván Mora-Seró, Sixto GimenezInspired
by the outstanding optoelectronic properties reported
for all-inorganic halide perovskite quantum dots (QDs), we have evaluated
the potential of these materials toward the photocatalytic and photoelectrochemical
degradation of organic compounds, taking the oxidation of 2-mercaptobenzothiazole
(MBT) as a proof-of-concept. First, we determined electrochemically
the energy levels of dispersions of perovskite QDs with different
band gaps induced by the different ratios between halides (Br and
I) and metallic cations (Pb and Sn). Then, we selected CsPbBr3 QDs to demonstrate the photocatalytic and photoelectrochemical
oxidation of MBT, confirming that hole injection takes place from
CsPbBr3 QDs to MBT, resulting in the total degradation
of MBT as evidenced by electrospray mass spectrometry analyses. Although
the stability and toxicity of these QDs are major issues to address
in the near future, the results obtained in the present study open
promising perspectives for the implementation of solar-driven catalytic
strategies based on these fascinating materials.
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All-Inorganic Metal Halide Perovskite Quantum Dotshole injectionperovskite QDsphotoelectrochemical degradation2- mercaptobenzothiazoleCsPbBr 3 QDsall-inorganic halide perovskite quantum dotsMBTmaterialPhotoelectrochemical Degradationoptoelectronic propertiesphotocatalyticOrganic Compoundsenergy levelsband gapsphotoelectrochemical oxidationelectrospray mass spectrometry analyses
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