Construction of g-pTAP/TiO2 heterostructure for enhanced photoelectrochemical performance

•Type-I heterostructure of g-PTAP and TiO2 via solid state polycondensation reaction  .•g-PTAP concentration influences the structural, morphological and optical attributes.•The composite heterostructure demonstrates an enhanced catalytic performance.•Strong dependency of catalytic activity on g-pTAP percentage in the heterostructure