Unveiling the critical role of surface adsorbed oxygen species for efficiently photothermocatalytic oxidation of VOCs: Replenishing the active surface lattice oxygen sites.

Surface oxygen species play a crucial role in the photothermocatalytic oxidation of volatile organic compounds (VOCs), but their exact functions and evolutionary processes remain unclear. Herein, a series of spinel CoMnO catalysts are synthesized and employed for photothermocatalytic oxidation of toluene. CoMnO catalysts achieve 91.

Electron transfer mediated activation of periodate by contaminants to generate O by charge-confined single-atom catalyst.

The electron transfer process (ETP) is able to avoid the redox cycling of catalysts by capturing electrons from contaminants directly. However, the ETP usually leads to the formation of oligomers and the reduction of oxidants to anions. Herein, the charge-confined Fe single-atom catalyst (Fe/SCN) with Fe-NS configuration was designed to achieve ETP-mediated contaminant activation of the oxidant by limiting the number of electrons gained by the oxidant to generate O.

Scaling of development indicators in countries and its origin.

Population-normalized indicators (e.g., GDP per capita), under the assumption of the indicators scaling linearly with population, are ubiquitously used in national development performance comparison.

Induced Manipulation of Atomically Dispersed Cobalt through S Vacancy for Photocatalytic Water Splitting: Asymmetric Coordination and Dynamic Evolution.

It is still a challenge to construct single-atom level reduction and oxidation sites in single-component photocatalyst by manipulating coordination configuration for photocatalytic water splitting. Herein, the atomically dispersed asymmetric configuration of six-coordinated Co-SO (two exposed S atoms, two OH groups, and two Co─O─Zn bonds) suspending on ZnInS nanosheets verified by combining experimental analysis with theoretical calculation, is applied into photocatalytic water splitting. The Co-SO site immobilized by Vs acts as oxidation sites to guide electrons transferring to neighboring independent S atom, achieving efficient separation of reduction and oxidation sites.

Copper-Catalyzed Vicinal Thiocyanosulfonylation of Alkenes and Alkynes.

Efficient copper-catalyzed radical thiocyanosulfonylation of alkenes and alkynes with potassium thiocyanate and sodium phenylsulfinate is described. The reactions provide general and convenient methods toward the synthesis of β-thiocyanoalkyl sulfones and β-thiocyanoalkenyl sulfones, respectively, in satisfactory yields. Based on conducted mechanistic experiments, a mechanism involving oxidative generation of sulfonyl radicals and subsequent addition to alkenes followed by Cu-assisted thiocyanation is proposed.

Bidirectional Enhancement of Nitrogen Removal by Indigenous Synergetic Microalgal-Bacterial Consortia in Harsh Low-C/N Wastewater.

Conventional microalgal-bacterial consortia have limited capacity to treat low-C/N wastewater due to carbon limitation and single nitrogen (N) removal mode. In this work, indigenous synergetic microalgal-bacterial consortia with high N removal performance and bidirectional interaction were successful in treating rare earth tailing wastewaters with low-C/N. Ammonia removal reached 0.

Efficient Homolytic Cleavage of HO on Hydroxyl-Enriched Spinel CuFeO with Dual Lewis Acid Sites.

Traditional HO cleavage mediated by macroscopic electron transfer (MET) not only has low utilization of HO, but also sacrifices the stability of catalysts. We present a non-redox hydroxyl-enriched spinel (CuFeO) catalyst with dual Lewis acid sites to realize the homolytic cleavage of HO. The results of systematic experiments, in situ characterizations, and theoretical calculations confirm that tetrahedral Cu sites with optimal Lewis acidity and strong electron delocalization can synergistically elongate the O-O bonds (1.

Selective anchoring of Pt NPs on covalent triazine-based frameworks derived bridging ligands for boosting photocatalytic hydrogen evolution.

The efficient and stable production of hydrogen (H) through Pt-containing photocatalysts remains a great challenge. Herein, we develop an effective strategy to selectively and uniformly anchor Pt NPs (∼1.2 nm) on a covalent triazine-based framework photocatalyst derived bridging ligands.

Insight into the Alkali Resistance Mechanism of FeMoTiO Catalysts for NH Selective Catalytic Reduction of NO: Self-Defense Effects of MoO for Alkali Capture.

The deactivation of selective catalytic reduction (SCR) catalysts caused by alkali metal poisoning remains an insurmountable challenge. In this study, we examined the impact of Na poisoning on the performance of Fe and Mo co-doped TiO (FeMoTiO) catalysts in the SCR reaction and revealed the related alkali resistance mechanism. On the obtained FeMoTiO catalyst, the synergistic catalytic effect of uniformly dispersed FeO and MoO species leads to remarkable catalytic activity, with over 90% NO conversion achieved in a wide temperature range of 210-410 °C.

Controllable Pyridine N-Oxidation-Nucleophilic Dechlorination Process for Enhanced Dechlorination of Chloropyridines: The Cooperation of HCO and HO.

Dechlorination of chloropyridines can eliminate their detrimental environmental effects. However, traditional dechlorination technology cannot efficiently break the C-Cl bond of chloropyridines, which is restricted by the uncontrollable nonselective species. Hence, we propose the carbonate species-activated hydrogen peroxide (carbonate species/HO) process wherein the selective oxidant (peroxymonocarbonate ion, HCO) and selective reductant (hydroperoxide anion, HO) controllably coexist by manipulation of reaction pH.

Targeted Decomplexation of Metal Complexes for Efficient Metal Recovery by Ozone/Percarbonate.

Traditional methods cannot efficiently recover Cu from Cu(II)-EDTA wastewater and encounter the formation of secondary contaminants. In this study, an ozone/percarbonate (O/SPC) process was proposed to efficiently decomplex Cu(II)-EDTA and simultaneously recover Cu. The results demonstrate that the O/SPC process achieves 100% recovery of Cu with the corresponding value of 0.

Synergistically interactive P-Co-N bonding states in cobalt phosphide-decorated covalent organic frameworks for enhanced photocatalytic hydrogen evolution.

Non-noble materials with high efficiency and stability are essential for renewable energy applications. Herein, cobalt phosphide nanoparticles-decorated covalent organic frameworks (CTF-CoP) are synthesized an self-assembly method combined with the calcination process. In such a configuration, an intimate interaction between CoP and CTF matrix is gained through the Co-N chemical bonds, which not only significantly enhance the recyclability of CoP nanoparticles but also significantly improve the charge separation efficiency.

Copper-Catalyzed Radical Hydrazono-Phosphorylation of Alkenes.

An efficient copper-catalyzed radical hydrazono-phosphorylation of alkenes with hydrazine derivatives and diarylphosphine oxides is described. The reaction provides a general and convenient method toward the synthesis of diverse β-hydrazonophosphine oxides in satisfactory yields. Based on conducted mechanistic experiments, a mechanism involving Ag-catalyzed oxidative generation of phosphinoyl radicals and subsequent addition to alkenes followed by Cu-assisted hydrazonation is proposed.

Copper-Catalyzed Stereoselective Radical Phosphono-hydrazonation of Alkynes.

A copper-catalyzed stereoselective phosphono-hydrazonation of terminal alkynes with alkyl carbazates and diarylphosphine oxides is described. This methodology provides facile access to a variety of β-hydrazonophosphine oxides in satisfactory yields. The reaction proceeds under mild conditions and exhibits good functional group tolerance.

Overcoming Electrostatic Interaction via Strong Complexation for Highly Selective Reduction of CN into N.

Limited by the electrostatic interaction, the oxidation reaction of cations at the anode and the reduction reaction of anions at the cathode in the electrocatalytic system nearly cannot be achieved. This study proposes a novel strategy to overcome electrostatic interaction via strong complexation, realizing the electrocatalytic reduction of cyanide (CN ) at the cathode and then converting the generated reduction products into nitrogen (N ) at the anode. Theoretical calculations and experimental results confirm that the polarization of the transition metal oxide cathodes under the electric field causes the strong chemisorption between CN and cathode, inducing the preferential enrichment of CN to the cathode.

Copper-Catalyzed Cross-Coupling of Alkyl and Phosphorus Radicals for C(sp)-P Bond Formation.

A Cu-catalyzed cross-coupling of alkyl- and phosphorus-centered radicals for C(sp)-P bond formation is introduced. Diacyl peroxides, generated in situ from aliphatic acids and HO, serve as a source for alkyl radicals and also an initiator for the generation of phosphorus radicals from H-P(O) compounds.

Degradation of pesticide wastewater with simultaneous resource recovery via ozonation coupled with anaerobic biochemical technology.

The effective treatment of pesticide wastewater with high organic content, complex composition and high-toxicity has attracted enormous attention of researchers. This work proposes a new idea for removing the pesticide wastewater with simultaneous resource recovery, which is different from the traditional view of mineralization of pesticide wastewater via composite technology. This novel strategy involved a sequential three-step treatment: (a) acidic Ozonation process, to remove the venomous aromatic heterocyclic compounds; (b) hydrolysis and ozonation in alkaline conditions, enhancing the biodegradability of pesticide wastewater, mainly due to the dehalogenation, elimination of C=C bonds and production of low molecular-weight carboxylate anions; (c) the final step is anaerobic biological reactions.

Mineralization of cyanides via a novel Electro-Fenton system generating •OH and •O.

Traditional methods of cyanides' (CN) mineralization cannot overcome the contradiction between the high alkalinity required for the inhibition of hydrogen cyanide evolution and the low alkalinity required for the efficient hydrolysis of cyanate (CNO) intermediates. Thus, in this study, a novel Electro-Fenton system was constructed, in which the free cyanides released from ferricyanide photolysis can be efficiently mineralized by the synergy of •OH and •O. The complex bonds in ferricyanide (100 mL, 0.

Shifts of surface-bound •OH to homogeneous •OH in BDD electrochemical system via UV irradiation for enhanced degradation of hydrophilic aromatic compounds.

Indirect electrochemical oxidation by hydroxyl radicals is the predominant degradation mechanism in electrolysis with a boron-doped diamond (BDD) anode. However, this electrochemical method exhibits low reactivity in removal of hydrophilic aromatic pollutants owing to mass transfer limitation. In this study, the combination of ultraviolet light and BDD electrolysis could increase the degradation rate of hydrophilic aromatic pollutants by approximately 8-10 times relative to electrolysis alone.

Carbon Nitride Supported High-Loading Fe Single-Atom Catalyst for Activation of Peroxymonosulfate to Generate O with 100 % Selectivity.

Singlet oxygen ( O ) is an excellent active species for the selective degradation of organic pollutions. However, it is difficult to achieve high efficiency and selectivity for the generation of O . In this work, we develop a graphitic carbon nitride supported Fe single-atoms catalyst (Fe /CN) containing highly uniform Fe-N active sites with a high Fe loading of 11.

Ubiquitin-specific protease 15 contributes to gastric cancer progression by regulating the Wnt/β-catenin signaling pathway.

Background: Ubiquitin-specific protease 15 (USP15) is an important member of the ubiquitin-specific protease family, the largest deubiquitinase subfamily, whose expression is dysregulated in many types of cancer. However, the biological function and the underlying mechanisms of USP15 in gastric cancer (GC) progression have not been elucidated.

Aim: To explore the biological role and underlying mechanisms of USP15 in GC progression.

Bioavailability quantification and uptake mechanisms of pyrene associated with different-sized microplastics to Daphnia magna.

Microplastics (MPs) are the significant environmental factor for bioavailability of hydrophobic organic contaminants (HOCs) in aquatic environments. Nevertheless, the bioavailability of microplastic-associated HOCs remains unclear. In this research, the freely dissolved pyrene concentrations were kept stable with passive dosing devices, and the pyrene content in D.

Copper-Catalyzed Coupling of Amines with Carbazates: An Approach to Carbamates.

A new approach for the preparation of carbamates the copper-catalyzed cross-coupling reaction of amines with alkoxycarbonyl radicals generated from carbazates is described. This environmentally friendly protocol takes place under mild conditions and is compatible with a wide range of amines, including aromatic/aliphatic and primary/secondary substrates.

Copper-Catalyzed Vicinal Cyano-, Thiocyano-, and Chlorophosphorylation of Alkynes: A Phosphinoyl Radical-Initiated Approach for Difunctionalized Alkenes.

A copper-catalyzed difunctional cyano-, thiocyano-, and chlorophosphorylation reaction of alkynes with P(O)-H compounds and coupling partners (TBACN, TMSNCS, TMSCl) is described. The reaction introduces versatile groups (-P(O)R and -CN, -SCN, or -Cl) to form tri- and tetrasubstituted alkenyl phosphine oxides/phosphonates regio- and stereoselectively.