Iron-based Nanomaterials in the Catalysis

Available data on catalytic applications of the iron-containing nanomaterials are reviewed. Main synthesis methods of nZVI, nano-sized iron oxides and hydroxides, core-shell and alloy structures, ferrites, iron-containing supported forms, and composites are described. Supported structures include those coated and on the basis of polymers or inert inorganic materials (i.e., carbon, titania or silica). Description of catalytic processes includes the decomposition reactions (in particular photocatalytic processes), reactions of dehydrogenation, oxidation, alkylation, C–C coupling, among a series of other processes. Certain attention is paid to magnetic recovery of catalysts from reaction systems and their reuse up to several runs almost without loss of catalytic activity

Indium sulfide thin films as window layer in chemically deposited solar cells

Indium sulfide (In2S3) thin films have been synthesized by chemical bath deposition technique onto glass substrates using In(NO3)3 as indium precursor and thioacetamide as sulfur source. X-ray diffraction studies have shown that the crystalline state of the as-prepared and the annealed films is β-In2S3. Optical band gap values between 2.27 and 2.41 eV were obtained for these films. The In2S3 thin films are photosensitive with an electrical conductivity value in the range of 10−3 –10−7 (Ω cm)−1, depending on the film preparation conditions. We have demonstrated that the In2S3 thin films obtained in this work are suitable candidates to be used as window layer in thin film solar cells. These films were integrated in SnO2:F/In2S3/Sb2S3/PbS/C–Ag solar cell structures, which showed an open circuit voltage of 630 mV and a short circuit current density of 0.6 mA/cm2

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Efecto de los iones acetato nitrito y tiocianato en el cambio morfológico de nanoprismas triangulares a nanodiscos de plata

En el presente trabajo se estudio la capacidad de los pseudohalogenuros, acetato, nitrito y tiocianato; para llevar a cabo el cambio morfológico de nanoprismas triangulares a nanodiscos de plata. Las nanoestructuras de plata resultantes fueron caracterizadas mediante espectrofotometria UV-Vis, microscopía electrónica barrido (SEM) mi microscopía electrónica de transmisión (TEM). Los pseudohalogenuros estudiados reaccionaron de manera selectiva con iones presentes en los vértices de los nanoprismas triangulares de plata provocando el truncamiento de las esquinas ocasionando un cambio en la morfologia de la nanoestructur

Síntesis de nanopartículas de ZnS vía microondas.

En este trabajo se presentan los resultados de las síntesis de nanopartículas de ZnS a partir de ZnSO4 utilizando un horno de microondas convencional de 1650 W en pruebas de 60 segundos

The effect of changing the electrolyte species volume ratio on the electropolishing of aluminum foil

In this paper, the electrochemical behavoir and surface orphology of AA1100 were investigated in commercial electropolishing electrolyte consisting of perchloric acid (HCIO4) and ethanol (C2H5OH

Efecto de los iones acetatos nitrito y tiocianato en el cambio morfológico de nanoprismas triangulares a nanodiscos de plata

En el presente trabajo se estudio la capacidad de los pseudohalogenuros, acetato, nitrito y tiocianato; para llevar a cabo el cambio morfológico de nanoprismas triangulares a nanodiscos de plata. Las nanoestructuras de plata resultantes fueron caracterizadas mediante espectrofotometria UV-Vis, microscopía electrónica barrido (SEM) mi microscopía electrónica de transmisión (TEM). Los pseudohalogenuros estudiados reaccionaron de manera selectiva con iones presentes en los vértices de los nanoprismas triangulares de plata provocando el truncamiento de las esquinas ocasionando un cambio en la morfologia de la nanoestructur