Cu–TiO2 nanorods with enhanced ultraviolet- and visible-light photoactivity for bisphenol A degradation

A review of solar and visible light active TiO2 photocatalysis for treating bacteria, cyanotoxins and contaminants of emerging concern

“…It was also noted that when the pH was increased to an alkaline state, a repulsion of the BPA molecules from the CN-TiO 2 surface was detected, leading to the conclusion that a more circumneutral pH, 5 opH o 9, was optimum for BPA degradation. Composite systems of nitrogen doped TiO 2 supported on activated carbon (AC) under solar irradiation [149] and Cu-TiO 2 under visible light irradiation [150] have also been studied as potential technologies for BPA removal from aqueous systems.…”

Piezotronic-effect-enhanced Ag2S/ZnO photocatalyst for organic dye degradation

“…[18][19][20][21] Transition metals, such as Cu, Co, and Ni, have been investigated in an attempt to replace noble metals. [22][23][24] In semiconductor/semiconductor hybrid photocatalysts, metal oxides and suldes have been extensively applied to construct heterojunctions/interfaces that can effectively facilitate the spatial separation of photoexcited electron-hole pairs using suitable band alignment. In particular, for type II heterojunctions/interfaces, photoexcited electrons tend to transfer from the semiconductor with a narrower band gap to that with a wider band gap, while photoexcited holes oen transfer in the opposite direction due to the relative positions of the valence band (VB) and conduction band (CB).…”

The advanced removal of benzene from aerosols by photocatalytic oxidation and adsorption of Cu–TiO 2 /PU under visible light irradiation

“…2 shows the high-resolution XPS spectra for the Cu 2p 3/2 peaks of copper in 2, 4, 6, 8 and 10% Cu-TiO 2 /PU. The Cu 2p 3/2 peaks of copper in Cu-TiO 2 /PU consisted of two different peaks, observed at 932.18 and 933.48 eV, which were attributed to the binding energies of Cu 2p 3/2 of the Cu + and Cu 2+ states, respectively [24,25]. Most of the Cu + and Cu 2+ existed in the forms of Cu 2 O and CuO oxides, respectively.…”