Recent Progress and Prospects in Catalytic Water Treatment

Abstract

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Activation of O2 over three-dimensional manganese oxide nanoprisms under ambient conditions towards oxidative removal of aqueous organics

“…Catalytic wet air oxidation (CWAO) has emerged as an efficient process for activation of O 2 and then degradation of organic contaminants with high concentration. [27][28][29][30][31][32] However, harsh conditions, such as high temperatures (∼100 °C) and pressures (∼5 MPa), are generally required for realizing a good removal efficiency, which leads to high cost and investment. [33][34][35][36] In recent years, activation of O 2 over advanced catalytic materials under ambient conditions has been developed for the degradation of aqueous emerging contaminants and persistent organic pollutants.…”

Visualization of Electrochemically Accessible Sites in Flow-through Mode for Maximizing Available Active Area toward Superior Electrocatalytic Ammonia Oxidation

“…Sufficient HClO production at the corner is dependent on sufficient Cl – ions being involved in the CER, but no corresponding decrease in Cl – ion concentration was observed in the Cl – ion visualization. This result is attributed to the replenishment of Cl – ions by mass transport, because the accessible electrolyte near the corner is the most abundant . In summary, the front side is the most active electrochemically accessible site, and the electrochemical accessibility of the inner side gradually decreases along the depth direction of the pore channel.…”

Encapsulation-Led Adsorption of Neutral Dyes and Complete Photodegradation of Cationic Dyes and Antipsychotic Drugs by Lanthanide-Based Macrocycles

“…Organic dyes are extensively employed in numerous industrial and commercial activities, while residual dyes are ordinarily released into the environment. , Because organic dyes are mostly carcinogenic, their removal from the environment is critically essential especially because their natural degradation is a very slow process owing to their high stability. ,− Several medicinal compounds also show structural similarities with a few organic dyes. , Examples include the phenothiazine derivatives chlorpromazine, thioridazine, and trifluoperazine, which have been utilized as antipsychotic drugs for the treatment of schizophrenia and also have antitumor, antibacterial, antiplasmid, and antituberculosis properties. − Phenothiazines have also been used as DNA markers. , Notably, such drugs share structural similarities with a few dyes such as methylene blue, azure B, and toluidine blue O. ,, Similar to dyes, such drugs are also biologically nondegradable, subsequently entering the environment, where they are ecotoxic. ,, Conventional removal methods mostly rely on chemical treatments and are thus nonsustainable. , These challenges have compelled the scientific community to look for alternate strategies for the removal and possible degradation of dyes, drugs, and related compounds. − …”