Table 1

The functions of PDA in the field of PEC.

Materials Functions Refs.
CdS/PDA/FeOOH Passage of photogenerated holes This work
CdS/PDA/Nafion Reduces surface defects of CdS and facilitates Nafion coating [10]
TiO2/CdS@PDA Co-photosensitization, and as a shelter against photo corrosion [29]
Cu2O/PDA/TiO2 Adhesive properties, hydrophilicity and passivation layer [30]
CdS/PDA/Co-Pi Enhance electron conductivity and form a passivation layer [32]
g-C3N4@PDA/BiOBr PDA as an efficient electron transfer mediator [37]
TiO2/PDA Enhancing the hole–electron separation and harvesting visible light [38]
Ti/TiO2NT@PDA-AgNP In situ reducing agent capable of reducing some metal ions [39]
PDA15/ZnO/Co3O4 Enhanced CO2 adsorption/activation capacity by PDA modification [40]
Ag/AgCl/PDA-TiO2 A stabilizer and reductant in fabricating the photocatalyst [41]

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