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Constructing oxygen vacancies in Cu-doped MnO by a quenching strategy for boosting the catalytic oxidation of toluene.
J Hazard Mater
January 2025
College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China; Shenyang Key Laboratory of Chemical Pollution Control, Shenyang University of Chemical Technology, Shenyang 110142, China. Electronic address:
Here, a quenching strategy was developed to create oxygen vacancies in Cu doped α-MnO. The evolutions of oxygen vacancies were directly followed by means of XRD refinement, EPR and XPS. In combination with DFT calculations and detailed characterizations, evidence is captured that oxygen vacancies not only act as direct sites for the adsorption and activation of gaseous oxygen and toluene, but also accelerate the consumption and replenishment cycle of lattice oxygen species by weakening the strength of metal-oxygen bonds.
View Article and Find Full Text PDFTwenty years of studying the origins and fate of atmospheric mercury over the Mediterranean Sea.
Sci Total Environ
January 2025
CNR-Institute of Atmospheric Pollution Research, Rende Division, UNICAL Polifuzionale, Rende 87036, CS, Italy.
This study provides a review of 13 oceanographic campaigns between 2000 and 2017 to measure Hg in the Mediterranean, highlighting major findings from measurement and modelling activities during the Med-Oceanor program. The initial campaigns showed that high concentrations of RGM could be found far from industrial source regions and the observed daily variation in concentration, with peaks at midday and lower concentrations during darkness gave the first indications that photochemically mediated oxidation reactions were producing RGM in the MBL. Later atmospheric chemistry modelling studies showed the feasibility of Hg oxidation by bromine containing oxidants, which are released as a result of the acidification of sea salt aerosols in the Marine Boundary Layer (MBL).
View Article and Find Full Text PDFThe effect of additives on particulate matter and gaseous emissions from combustion and oxy-fuel combustion of a biofuel blend composed of poultry manure and pine wood chips.
Environ Sci Pollut Res Int
January 2025
Department of Energy Systems Engineering, Faculty of Engineering and Architecture, Burdur Mehmet Akif Ersoy University, 15030, Burdur, Turkey.
In this study, the effect of additives on particulate matter (PM) and flue gas emissions during the co-combustion of poultry waste and pine woodchips in air and oxy-fuel combustion conditions was examined. The appropriate additive for the fuel mixture to reduce PM emissions has been selected by a fast screening method based on thermogravimetric analysis (TGA) in oxygen environment. Among the additives CaHPO, MgCO, MnCO, MgPO, kaolin, CaO, and Zn, the most suitable ones were determined as Zn and MgCO.
View Article and Find Full Text PDFPhytotoxic Effects of Polystyrene Microplastics on Growth Morphology, Photosynthesis, Gaseous Exchange and Oxidative Stress of Wheat Vary with Concentration and Shape.
Toxics
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Department of Environmental Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan.
Microplastics pose a serious ecological threat to agricultural soils, as they are very persistent in nature. Microplastics can enter the soil system in different ways and present different shapes and concentrations. However, little is known about how plants react to microplastics with different concentrations and shapes.
View Article and Find Full Text PDFAdvancing Oxygen Evolution Catalysis with Dual-Phase Nickel Sulfide Nanostructures.
Energy Fuels
January 2025
Department of Gaseous Electronics (F6), Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia.
The production, conversion and storage of energy based on electrocatalysis, mainly assisted by oxygen evolution reaction (OER), plays a crucial role in alkaline water electrolyzers (AWEs) and fuel cells. Nevertheless, the insufficient availability of highly efficient catalyst materials at a reasonable cost that overcome the sluggish electrochemical kinetics of the OER is one of the significant obstacles. Herein, we report a fast and facile synthesis of vapor phase deposition of dual-phase nickel sulfide (Ni-sulfide) using low-temperature annealing in the presence of HS and demonstrated as an efficient catalyst for OER to address the issues with sluggish electrochemical kinetics.
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