Highly Adsorptive and Magneto-Inductive Guefoams (Multifunctional Guest-Containing Foams) For Enhanced Energy-Efficient Preconcentration and Management of VOCs

Abstract

The design of multifunctional materials is a current demand for high-end technological applications that need to combine different functions unable to be accomplished by a single material. The aim of this work is to present, at first glance, a new family of recently patented multifunctional porous materials developed by locating granular phases with specific functionality (guests) within the cavities of open-pore cellular materials (hosts) and, at second glance, the use of a set of these materials for the preconcentration and management of volatile organic compounds (VOCs). These materials (herein known as Guefoams, acronym for Guest-containing foams), present host foams and guest phases that are not bonded and therefore allow fluids to pass through. The processing method is the gas pressure infiltration of a host precursor into

Aluminum Guefoams Coated with Reduced Graphene Oxide: A Corrosion Protection Study

“…The initial stage involved preparing the particles that made up the packed preform. For this purpose, Nuchar RGC-30 activated carbon (AC) particles with an average diameter of 1.4 mm (Westvaco-Chemical Division, Wickliffe, OH, USA) were selected and coated with NaCl (Panreac AppliChem GmbH, Germany) according to the procedure described in [3]. The AC particles were placed on an oscillating flat surface heated at 80 • C such that the particles could maintain some degree of rotational motion.…”

“…This unique feature exposes the entire surface of the guest phases to the fluid that fills the porous cavity, providing broad functionality to the materials. Recently, metallic Guefoams with guest phases of activated carbon and steel spheres were developed as highly efficient materials for volatile organic compound management and preconcentration [3]. The guest phases provided high adsorption and made the materials susceptible to rapid desorption by magnetic induction-features that are impossible to achieve with traditional foams.…”

“…Graphene oxide is widely used among graphene materials due to its ease of preparation and scalability for large production [17]. As-synthesized graphene oxide is insulating due to the amount of sp 3 C−O bonding that exists in its structure, which disrupts the conducting pathways of sp 2 carbon [16]. Graphene oxide conductivity can be partially restored and tuned by the degree of chemical reduction.…”

Inhibit the formation of toxic methylphenolic by-products in photo-decomposition of formaldehyde–toluene/xylene mixtures by Pd cocatalyst on TiO2

“…As volatile organic compounds (VOCs) are major causes of many chronic lung diseases and cancers [1][2][3], the development of efficient purification technology as a prerequisite for ensuring high quality in-door air is a subject of ever increasing interest [4][5][6][7]. Among various approaches, photocatalysis based processes have attracted great atten-tion for the decomposition of VOCs owing to the following advantages.…”