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Herein, we discuss the synthesis as well as material and photochemical characterization of nanometer‐sized Ta2O5 decorated, in a controlled fashion, on top of 20 nm diameter SiO2 particles to yield a composite oxide with a tunable band‐gap width. Particular emphasis is paid to control of particle size, and control of the distribution of the overlying oxide. The nanoscale dimension imparts a high surface...
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