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Caption : figure s1. schematic illustration of the setup for the photodegradation test. a) ar purging step and b) photodegradation test.

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Caption : figure s2. top view of sem images of a) 0.005 mm pt sa – tio2 and b) 2 mm pt sa – tio2

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Caption : figure s3. xrd patterns of annealed tio2 layer and tio2 layer after pt deposition.

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Caption : figure s4. absorption spectra of ao7 degradation test executed with various samples in an air atmosphere.

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Caption : figure s5. absorption spectra of rhb degradation test executed with various samples in an air atmosphere.

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Caption : figure s6. absorption spectra of ao7 and rhb degradation test executed with various samples in an ar atmosphere.

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Caption : figure s7. examination of photofading and "photosensitization" effects. absorption spectra of (a) ao7 and (e) rhb, (b-d) ao7 degradation test executed without and with tio2 in an air atmosphere under 450 nm. (f-h) rhb degradation test executed without and with tio2 in an air atmosphere under 550 nm.

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Caption : figure s8. absorption spectra of nbt assay executed with various samples in an air atmosphere

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Caption : figure s9. nbt assay executed in an ar atmosphere with bare tio2, 0.005 mm pt sa tio2, and 0.005 mm pt np tio2

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Caption : figure s10. linear sweep voltammetry curves carried out in 0.1 m na2so4 electrolyte with bare tio2 (black curve) and 2 mm pt sas tio2 (red curve)

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Caption : figure s11. cycling stability of 2mm pt sa tio2 for ao7 degradation