Surface hydroxylation over oxide catalysts often occurs in many catalytic processes involving H and HO, which is considered to play an important role in elementary steps of the reactions. Here, monolayer CoO and CoOH nanoislands on Pt(111) are used as inverse model catalysts to study the effect of surface hydroxylation on the stability of Co oxide overlayers in O. Surface science experiments indicate that hydroxyl groups formed on CoO nanoislands produced by deuterium-spillover can enhance oxidation resistance of the Co oxide nanostructures. Theoretical calculation shows that the interfacial adhesion between CoO and Pt is linearly strengthened with the increasing hydroxylation degree of CoO surface. Thus, the interface confinement effect between CoO and Pt can be enhanced by the surface hydroxylation due to the more reduced Co ions and stronger Co-Pt bonding at the CoOH/Pt interface.
Cadmium （Cd） and arsenic （As） often coexist in water and agricultural soils around mining areas, and it is difficult to remove them at the same time due to their opposite chemical behaviors. Therefore, this study employed a co-precipitation-pyrolysis method to synthesize silica-based magnetic biochar （SMB） materials for the remediation of water contaminated with both Cd and As. The optimization of preparation conditions involved introducing three different types of silicates （NaSiO, CaSiO,and SiO） into the biomass-magnetite mixture, followed by pyrolysis at various temperatures （300℃, 500℃, and 700℃）, and the optimal preparation conditions were determined based on the composite batch experiments.
Monotherapy has poor accuracy and is easily restricted by tumor microenvironment (TME). Remodeling components of the TME to activate multimodal cancer therapy with high precision and efficiency is worth exploring. A multifunctional nanoreactor was fabricated by decorating chlorin e6-modified and PEGylated hyaluronic acid bearing diethylenetriamine-conjugated dihydrolipoic acid on the surface of glucose oxidase (GOx)-loaded hollow mesoporous CuS nanoparticles (labeled as GOx@HCuS@HA).
Universidad Politécnica de Madrid (UPM), E.T.S de Ingenieros Industriales, Departamento de Ingeniería Química Industrial y del Medio Ambiente, c/José Gutiérrez Abascal 2, 28006, Madrid, Spain. Electronic address:
This work examines the photocatalytic capacity of FeO-TiO catalysts for inactivating Enterococcus faecalis in water and compares it to a peroxide-assisted process. The influence of HO, PMS, pH, and temperature is assessed. Material stability and free radical species involved in disinfection are also evaluated.
Chitosan is a nontoxic biopolymer with many potential biomedical and material applications due to its biodegradability, biocompatibility, and antimicrobial properties. Here, fully atomistic molecular dynamics simulations and enhanced sampling methods have been used to study the adsorption mechanism of chitosan oligomers on a silica surface from an aqueous solution. The free energy of adsorption of chitosan on a silica surface was calculated to be 0.
Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering and Technology, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China.
Chlorinated and oxygenated volatile organic compounds (CVOCs and OVOCs) pose a significant threat to human health. Catalytic oxidation effectively removes these pollutants, but catalyst deactivation is a challenge. Our study focused on the hydrolysis oxidation of chlorobenzene (CB) and ethyl acetate (EA) over Ru/MO/HZSM-5 (M = W, Mo).
