Solar-driven photocatalytic removal of NO over a concrete paving eco-block containing black TiO₂

Abstract

The dispersion containing black TiO2 photocatalyst was prepared and sprayed onto the concrete's surface to achieve a black TiO2-based photocatalytic concrete paving Eco-block, and its photocatalytic NO removal ratio is...

Preparation of Novel Layered High Entropy Bismuth-Based Materials and their Photocatalytic Degradation Mechanism

“…Figure a showed that the Bi 4f spectrum could be decomposed into two peaks at 159.16 and 164.47 eV, belonging to Bi 4f 7/2 and Bi 4f 5/2 , respectively, indicating the presence of Bi 3+ Figure b showed the O 1s XPS spectrum, with peaks at 529.89, 530.45, and 531.60 eV corresponding to lattice oxygen, , carbonate species, and surface hydroxyl groups in BiO­[ClBrI­(CO 3 ) 0.5 ], respectively . The C 1s peak in BiO­[ClBrI­(CO 3 ) 0.5 ] had three characteristic peaks, with the peak at 288.59 eV attributed to CO 3 , − and the peaks at 286.32 and 284.72 eV belonged to C–O and C–C, − respectively (Figure c).…”

“…Figure b showed the O 1s XPS spectrum, with peaks at 529.89, 530.45, and 531.60 eV corresponding to lattice oxygen, , carbonate species, and surface hydroxyl groups in BiO­[ClBrI­(CO 3 ) 0.5 ], respectively . The C 1s peak in BiO­[ClBrI­(CO 3 ) 0.5 ] had three characteristic peaks, with the peak at 288.59 eV attributed to CO 3 , − and the peaks at 286.32 and 284.72 eV belonged to C–O and C–C, − respectively (Figure c). Figure d showed the high-resolution spectrum of Cl 2p, with binding energy peaks located at 197.92 and 199.50 eV attributed to Cl 2p 3/2 and Cl 2p 1/2 , respectively, confirming the presence of Cl – in BiO­[ClBrI­(CO 3 ) 0.5 ]. , The binding energies of Br 3d at 68.19 and 69.26 eV correspond to Br 3d 5/2 and Br 3d 7/2 , respectively (Figure e) .…”

The temperature-controlled optimization of g-C3N4 structure significantly enhances the efficiency of photothermal catalytic NO removal

“…Although significant progress has been made in improving the removal efficiency of photocatalytic NO, the widespread industrial application still faces several challenges. 6–8 Firstly, most current photocatalysts have limited-service life and are prone to poisoning. For example, Duan et al developed amorphous carbon nitride with (N3C) nitrogen void by a one-step calcination method which broadened the photocatalytic response range and reduced reaction barriers by an order of magnitude, converting NO into NO 3 − for deep removal of NO.…”