Promotion effect of free Ag⁺ ions on photocatalytic dechlorination processes

Abstract

Free silver ions (Ag+) in the solution exhibit enhanced photocatalytic dechlorination processes of organic chloride over copper phenylacetylene (PhC2Cu) under visible light irradiation, including 2,4-dichlorophenol (2,4-DCP), 2-chlorophenol (2-CP) and 2,4,6-trichlorophenol...

Improvement of the Photoelectrochemical Stability of Cu2O Photocathode by PhCCCu Grafting

“…[ 42,43 ] Meanwhile, PhCCCu powder prepared by the reported photo‐thermal method shows an absorption band ≈500 nm, indicating wide responses in the UV and visible light region. [ 32–36 ] In addition, a weak absorption in the range of 600 nm < λ < 800 nm for PhCCCu is attributed to d–d transition of Cu(II) , [ 46 ] indicating the trace existence of CuO. After grafting PhCCCu, both edges of Cu 2 O (≈650 nm) and PhCCCu (≈500 nm) are observed, as well as weak d–d transition of Cu(II).…”

“…[29][30][31] Copper phenylacetylide (PhCCCu) is a newly reported metal-organic polymer semiconductor material with excellent photo/thermal stability, visible light response and high electron-hole pair separation efficiency. [32][33][34][35][36] Most importantly, it also shows strong hydrophobicity with the static water contact angle of 131.2°. [37] By the reported photo-thermal method, [16] high-quality PhCCCu protective layer was successfully self-assembled on the surface of Cu 2 O photocathode (Figure 1), effectively inhibiting its photocorrosion by separating it from the electrolyte solution and O 2 in air.…”

A photocatalyst with an enhanced Schottky effect and an efficient electron-transfer channel fabricated by assembling Ni–WC heterojunction nanoparticles on g-C3N4 for highly efficient removal of chlorophenols

“…According to the abovementioned results, the reasonable photocatalytic mechanism, shown in Fig. 7d and e, is proposed in eqn (1)-(6)…”

“…Once these kinds of pollutants are released into the environment, they cause serious damage to the ecosystem and human health. 5,6 Recently, various techniques including physical adsorption, 7 advanced chemical oxidation processes 8 and biological methods 9 have been employed for the treatment of wastewater and groundwater containing halogenated organic contaminants. However, the actual application of these reported techniques is severely restricted by the risk of secondary contamination or the toxicity of CPs to microbes.…”