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Highlights: [•] The F-ZnO-m was fabricated at low temperature (65°C) with controlled seed adsorption. [•] The photocatalytic activity of F-ZnO-m was found to be higher than that of other ZnO photocatalyst. [•] Moreover, F-ZnO-m exhibited excellent antibacterial activity. [•] The recycling photocatalytic and antibacterial activities of F-ZnO-m shows good stability. [ABSTRACT FROM AUTHOR]

Highlights: [•] The N-3D TiO2 was synthesized at low temperature via a modified hydrothermal process and ultrasound irradiation. [•] The N-3D TiO2 is irradiated with visible-light (*N-3D TiO2) to improve the hydroxylation of its surface. [•] The N- and *N-3D TiO2 exhibited excellent photocatalytic and antibacterial activities. [•] Moreover, the *N-3D TiO2 exhibits excellent photocatalytic stability. [ABSTRACT FROM AUTHOR]

Highlights: [•] The nanoporous N-TiO2 photocatalysts were successfully synthesized at room-temperature. [•] The *N-TiO2 was irradiated with visible-light to improve the surface hydroxylation of the N-TiO2 surface. [•] The N- and *N-TiO2 exhibited excellent photocatalytic and antibacterial activities. [•] Moreover, the *N-TiO2 exhibits excellent photocatalytic stability. [Copyright &y& Elsevier]

Highlights: [•] The C11TiO2-40 photocatalysts were successfully synthesized at room-temperature. [•] The photocatalytic activity of C11TiO2-40 was found to be higher than that of Degussa P25 and 5-nm sized anatase TiO2. [•] The recycling photocatalytic activity of C11TiO2-40 in our study shows good stability. [Copyright &y& Elsevier]

Abstract: We report highly visible-light active nanoporous carbon-doped TiO2 (C-TiO2) and sulfur-doped TiO2 (S-TiO2) for environmental and biomedical applications. C-TiO2 and S-TiO2 were synthesized at room temperature without thermal treatment using modified sol–gel processing and ultrasound irradiation. Under visible-light irradiation, the highest photocatalytic activity for S-TiO2 ([k]=3.121h−1) was found to be 28 times higher than that of undoped nanoporous TiO2 ([k]=0.112h−1). The recyclability of the S-TiO2 photocatalyst was found to be high with the decolorization rate at ∼92% of the initial value after fifteen cycles. Very interestingly, the C-TiO2 and S-TiO2 photocatalysts (crystallite size∼5.5nm) showed very strong antimicrobial properties against both Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus) compared to 5nm anatase TiO2 and undoped TiO2 photocatalysts after visible-light exposure for 3h. More than ∼95% of E. coli was killed, even after ten cycles of use for the S-TiO2 photocatalyst. Thus, we have demonstrated that C-TiO2 and S-TiO2 can serve as multifunctional generic bactericides, as well as highly visible-light active photocatalysts. [Copyright &y& Elsevier]