Engineering yolk-shell CuCo2S4@Cu2O Z-scheme nanoreactors for accelerating generation of value-added chemicals and of degradation multi-organic contaminants

Coupling Cu Coordination Polymers with CdS Forming an S-Scheme Heterojunction for Rapid Charge Separation and High Photocatalytic Activity

“…These defects were marked by a wide fwhm of 3.15 eV. It has been reported that the S 2p XPS spectra of the composites exhibited a corresponding satellite peak at 167.25 eV …”

“…It has been reported that the S 2p XPS spectra of the composites exhibited a corresponding satellite peak at 167.25 eV. 45 The N 1s XPS spectrum of Cu-CPs (Figure 6c) revealed two primary peaks at 400.17 and 401.73 eV, which were associated with the presence of sp 2 -hybridized pyridinium nitrogen bonds (C−N�C) and CN−H bonds, respectively. Previous research has demonstrated the significance of pyridine-N in the creation of the metal ion-N x structure.…”

“…Consequently, Cu-CPs@CdS-3 established a stable Cd−N x bond, enhancing the catalyst's stability and facilitating electron transfer. The Cu 2p XPS spectrum of Cu-CPs is shown in Figure 6d, and the significant peak at 933.33 eV suggested spin−orbit peaks of Cu + 2p 3/2 [reduced-state Cu species Cu(I)], 45 indicating the presence of Cu + in Cu-CPs. The peaks situated at 935.81 and 955.51 eV correspond to Cu 2p 3/2 and Cu 2p 1/2 spin−orbit peaks, respectively.…”

Spatial Confinement of Co Nanoparticles in N-Doped Carbon Nanorods for Wastewater Purification via CaSO3 Activation

“…The Fenton-like oxidation process, in which peroxysulfates were used as the oxidants to generate reactive oxygen species (ROS) (e.g., SO 4 •– and • OH), − had been deemed as a green and promising technology for the degradation of organic pollution. − However, excessive use of peroxysulfates could cause potentially biotoxicity, thus leading to secondary pollution. − Recently, sulfite has been deemed as a promising potential substitute to peroxysulfate for generating SO 4 •– in wastewater treatment due to its inexpensiveness and low toxicity. − Among these sulfites, CaSO 3 is regarded to be most suitable for wastewater treatment because CaSO 3 could slowly and persistently discharge SO 3 2– due to its low solubility (compared to Na 2 SO 3 and NaHSO 3 ), thus avoiding the depletion of the generated SO 4 •– and • OH under the high concentration of sulfite ions. − In this direction, a large number of heterogeneous catalysts, such as Fe–Cu, FeS, Fe- g -C 3 N 4 , ferrate, and siderite, have been designed and developed for activating CaSO 3 on wastewater treatment. However, the inherent defect of the heterogeneous Fenton-like oxidation process is the limitation of mass transfer, which is often overlooked in sulfate radical-based advanced oxidation processes. − The mass transfer of ROS (e.g., SO 4 •– and • OH) from its generation sites on the surface of heterogeneous catalysts into chemical pollutants in wastewater is severely restricted by its supershort lifetime (1 ns to 1 μs), greatly impeding their practical applications. − Moreover, these ROS are often quenched by natural organic matter and background inorganic anions in real wastewater . Hence, the development and implementation of nanotechnologies for enhancing the service efficiency of ROS (e.g., SO 4 •– and • OH) in the heterogeneous Fenton-like oxidation process is highly demanded. − …”

CdS and Ti3C2 Quantum Dot-Modified TiO2–x Nanotubes as Highly Efficient Photocatalysts for Selective Oxidation of Benzyl Alcohol to Benzaldehyde

“…However, highly valent metal salts are often used as oxidizing agents in the traditional oxidation of aromatic alcohols to aromatic aldehydes, so the products are not easily separated, and even hazardous waste can be generated. − In recent years, photocatalysis has proven to be an environmentally friendly, convenient, and cost-effective method for the selective oxidation of aromatic alcohols due to the advantages of mild reaction conditions and the absence of hazardous oxidants. Multiphase photocatalysts have great potential to reduce the energy consumption of various conversion processes and to synthesize a wide range of organic compounds. − …”