16 documents found, page 1 of 2
The need for self-sufficiency and integrated water and energy management: The c...
Silva, Ana R.C.; Silva, Ricardo M.; Charrua-Santos, Fernando; Espírito-Santo, António; Osório, Gerardo J.The "Smart energy” concept focuses on (i) being available and accessible in quantity and quality, (ii) being sustainable, that is, economically viable, socially fair, and environmentally correct, and (iii) the 4Es: Energy Amount, being available for consumption; Economic Energy, having viable cost and price; Equity Energy, serving the population with social justice; and Ecologic Energy, not deteriorating nature...
Customizing 3D structures of vertically aligned carbon nanotubes to direct neur...
Nascimento, Luís; Fernandes, Cristiana; Silva, Ricardo M.; Semitela, Ângela; Sousa, Bárbara M. de; Marques, Paula A. A. P.; Vieira, Sandra I.Neural tissue-related illnesses have a high incidence and prevalence in society. Despite intensive research efforts to enhance the regeneration of neural cells into functional tissue, effective treatments are still unavailable. Here, a novel therapeutic approach based on vertically aligned carbon nanotube forests (VA-CNT forests) and periodic VA-CNT micropillars produced by thermal chemical vapor deposition is ...
Catalyst-free CNTs growth on red mud-based alkali activated adsorbents: Innovat...
Carvalheiras, João; Oliveira, Inês E.; Silva, Ricardo M.; Silva, Rui F.; Novais, Rui M.; Labrincha, João A.The synthesis and growth of carbon nanotubes (CNTs) on red mud containing alkali activated materials (AAMs) envisioned for wastewater treatment applications is reported for the first time. This novel avenue takes advantage of the iron present in the red mud (RM), a massively produced industrial waste, promoting the growth of CNTs and avoiding the need for commercial catalysts. X-ray diffraction shows that upon ...
Impact of atomic layer deposited TiO2 on the photocatalytic efficiency of TiO2/...
Oliveira, Inês; Silva, Ricardo M.; Rodrigues, Joana; Correia, Maria R.; Monteiro, Teresa; Faria, Joaquim L.; Silva, Rui F.; Silva, Cláudia G.Titanium oxide (TiO2) has been widely investigated as a photocatalytic material, and the fact that its performance depends on its crystalline structure motivates further research on the relationship between preparation methods and material properties. In this work, TiO2 thin films were grown on non- functionalized wave-like patterned vertically aligned carbon nanotubes (w-VA-CNTs) via the atomic layer depositio...
Atomic layer deposition of nanometric alumina for corrosion protection of heter...
Oliveira, Marco P.; Silva, Ricardo M.; Yasakau, Kiryl A.; Bastos, Alexandre; Kallip, Silvar; Zheludkevich, Mikhail L.; Silva, Rui F.Nanometric layers of Al2O3 were applied by atomic layer deposition (ALD) on 2024-T3 aluminium alloy. The ALD layers suppressed the corrosion of the alloy as confirmed by Scanning Kelvin Probe Force Microscopy (SKPFM), polarization curves and Electrochemical Impedance Spectroscopy (EIS). The protection provided by the ALD layers weakened with the time of immersion and this was attributed to the incorporation of ...
Energy Sustainability Universal Index (ESUI): A proposed framework applied to t...
Silva, Ricardo M.; Silva, Ana R.C.; Lima, Tânia M.; Santos, Fernando Charrua; Osório, Gerardo J.There are numerous methodologies to measure sustainability, but there are few models on Energy Sustainability (ES) that focus on the proper use of energy sources. This manuscript aims to present the ESUI (Energy Sustainability Universal Index) framework for power generation. The method development consisted of four stages: (i) A survey of the State-of-the-Art to choose the dimensions and variables; (ii) The def...
Nanographene Oxide Functionalization with Organic and Hybrid Organic-Inorganic ...
Jaggernauth, Aneeta; Silva, Ricardo M.; Neto, Miguel A.; Hortiguela, Maria J.; Goncalves, Gil; Singh, Manoj K.; Oliveira, Filipe J.; Silva, Rui F.The functionalization of nanographene oxide (GO) with polymers is desirable for increasing the interface compatibility of GO, thereby enabling its use in a variety of applications such as biomedical and energy storage systems. Typically, wet chemistry processes are used to achieve polymer functionalization of GO, having limitations of high heterogeneity, time consumption, and difficult purification processes. T...
Coating of vertically aligned carbon nanotubes by a novel manganese oxide atomi...
Silva, Ricardo M.; Clavel, Guylhaine; Fan, Yafei; Amsalem, Patrick; Koch, Norbert; Silva, Rui F.; Pinna, NicolaA novel atomic layer deposition process of manganese oxide from methylcyclopentadienyl manganese tricarbonyl and ozone has been developed. It is used to coat vertically aligned carbon nanotubes (VACNTs) grown on a conductive Inconel substrate in order to produce a 3D array of metal oxide-carbon nanotube electrode. Electron microscopy studies show that a conformal polycrystalline film can be deposited on the VAC...
Coating of Vertically Aligned Carbon Nanotubes by a Novel Manganese Oxide Atomi...
Silva, Ricardo M.; Clavel, Guylhaine; Fan, Yafei; Amsalem, Patrick; Koch, Norbert; Silva, Rui F.; Pinna, NicolaA novel atomic layer deposition process of manganese oxide from methylcyclopentadienyl manganese tricarbonyl and ozone has been developed. It is used to coat vertically aligned carbon nanotubes (VACNTs) grown on a conductive Inconel substrate in order to produce a 3D array of metal oxide-carbon nanotube electrode. Electron microscopy studies show that a conformal polycrystalline film can be deposited on the VAC...
Turning periodic mesoporous organosilicas selective to CO2/CH4 separation: depo...
Lourenco, Mirtha A. O.; Silva, Ricardo M.; Silva, Rui F.; Pinna, Nicola; Pronier, Stephane; Pires, Joao; Gomes, Jose R. B.; Pintof, Moises L.Nowadays, CO2/CH4 separation is considered extremely important with respect to making biogas economically viable. The search for efficient materials for biogas upgrading is at the cutting edge of research in the field of energy. Periodic mesoporous organosilicas (PMO) are highly suitable for application as selective adsorbents for CO2 as they have concomitant high specific surface areas and tunable surface prop...