Tailored 3D CuO Nanogrid Formation

2022

Materials

This perspective involves two types of functional nanomaterials, amyloid fibrils and metal oxide nanowires and nanogrids. Both the protein and the inorganic nanomaterials rely on their polymorphism to exhibit diverse properties that are important to sensing and catalysis. Several examples of novel functionalities are provided from biomarker sensing and filtration applications to smart scaffolds for energy and sustainability applications.

Section: Smart and Hybrid Scaffoldsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Polymorphic Biological and Inorganic Functional Nanomaterials

Gilmore

2022

Materials

“…In another work, a CuO nanogrid sensor with a continuous, self-supported, intertwined nanograin architecture offering an extremely high surface area and interconnected porosity was also fabricated by electrospinning [29]. In this case, a solution of only PVP was electrospun onto a Cu mesh, and the whole assembly was heat treated at 500 • C. Figure 2 displays images of the multicrystal CuO nanowires grown from the Cu mesh during the heat treatment [30]. While no H 2 S-sensing tests have been conducted with this material in this morphology yet, CuO nanowires have been established as a successful H 2 S-sensing material by others [28].…”

Section: Cuo Nanowires For H 2 S Detectionmentioning

confidence: 99%

Future Trends in Semiconducting Gas-Selective Sensing Probes for Skin Diagnostics

Annerino

2021

Sensors

This paper presents sensor nanotechnologies that can be used for the skin-based gas “smelling” of disease. Skin testing may provide rapid and reliable results, using specific “fingerprints” or unique patterns for a variety of diseases and conditions. These can include metabolic diseases, such as diabetes and cholesterol-induced heart disease; neurological diseases, such as Alzheimer’s and Parkinson’s; quality of life conditions, such as obesity and sleep apnea; pulmonary diseases, such as cystic fibrosis, asthma, and chronic obstructive pulmonary disease; gastrointestinal tract diseases, such as irritable bowel syndrome and colitis; cancers, such as breast, lung, pancreatic, and colon cancers; infectious diseases, such as the flu and COVID-19; as well as diseases commonly found in ICU patients, such as urinary tract infections, pneumonia, and infections of the blood stream. Focusing on the most common gaseous biomarkers in breath and skin, which is nitric oxide and carbon monoxide, and certain abundant volatile organic compounds (acetone, isoprene, ammonia, alcohols, sulfides), it is argued here that effective discrimination between the diseases mentioned above is possible, by capturing the relative sensor output signals from the detection of each of these biomarkers and identifying the distinct breath print for each disease.

“…5,6 The CuO-WO 3 hybrid nanogrids comprised of interconnected chains, each chain consisting of links that are composed of nanocrystalline grains offering the high surface area for catalytic reactions to take place, the high amount of porosity for the hydrocarbon molecules to reach these grains, and the lightest of loads that ensures floatability without needing a support. 1,6 The limitation of the so-processed copper-tungsten oxide hybrid nanostructures is the current lack of scalability of the electrospinning process for ceramic oxide systems.…”

Section: 3mentioning

confidence: 99%

“…2,3 Indeed, CuO-WO 3 3D metal oxide nanomats developed by the authors involving directed self-assembly of metal clusters inside electrospun nanofibrous mats that create self-supported configurations was demonstrated to have advanced photocatalytic properties in breaking down hydrocarbons in water under visible light irradiation. 5,6 The CuO-WO 3 hybrid nanogrids comprised of interconnected chains, each chain consisting of links that are composed of nanocrystalline grains offering the high surface area for catalytic reactions to take place, the high amount of porosity for the hydrocarbon molecules to reach these grains, and the lightest of loads that ensures floatability without needing a support. 1,6 The limitation of the so-processed copper-tungsten oxide hybrid nanostructures is the current lack of scalability of the electrospinning process for ceramic oxide systems.…”

mentioning

confidence: 99%

Flame‐Spray‐Processed CuO–WO₃ Nanopowders as Photocatalysts

Lee

2014

J. Am. Ceram. Soc.

Self Cite

The scalable synthesis of Cu-doped WO 3 nanomaterials from molecular precursors is addressed here. A desktop flame spray pyrolysis process was used to synthesize of the oxide with 20 nm average diameter of the orthorhombic phase polymorph, which is the stable phase for WO 3 . The as-sprayed nanoparticles exhibit superior photoelectrical response to visible light illumination compared with nanoparticles of the same system processed by other routes.T UNGSTEN(VI) oxide (WO 3 ) is a visible light responsive photocatalyst, for oxygen generation, and has a valence band potential similar to that of titania, suggesting a similar oxidative ability of holes on the WO 3 valence band to those on TiO 2.1-3 However, it is known in the literature that pure WO 3 exhibits poor photocatalytic activity as far as the decomposition of organic compounds is concerned, probably due to the difficulty of the electron in the conduction band of WO 3 in reducing the oxygen.2,3 While Pd and Pt as cocatalysts are effective for the complete photodegradation of organic compounds under visible light, 4 they are too expensive for large-scale terrestrial applications. Instead, cupric oxide (CuO) has been considered as a potential economic and easy to make alternative for the noble metal cocatalysts. 2,3Indeed, CuO-WO 3 3D metal oxide nanomats developed by the authors involving directed self-assembly of metal clusters inside electrospun nanofibrous mats that create self-supported configurations was demonstrated to have advanced photocatalytic properties in breaking down hydrocarbons in water under visible light irradiation. 5,6 The CuO-WO 3 hybrid nanogrids comprised of interconnected chains, each chain consisting of links that are composed of nanocrystalline grains offering the high surface area for catalytic reactions to take place, the high amount of porosity for the hydrocarbon molecules to reach these grains, and the lightest of loads that ensures floatability without needing a support. 1,6 The limitation of the so-processed copper-tungsten oxide hybrid nanostructures is the current lack of scalability of the electrospinning process for ceramic oxide systems.Flame spray pyrolysis is a highly effective industrial process to synthesize oxide nanoparticles in large quantities while maintaining an excellent quality of product. It has been used for the dry, one-step synthesis of industrial catalysts, phosphors, and even nutritional supplements. 7 In essence this is a scalable process with proven production rates over 1 kg/h in industrial foundries.8 A recent report in the literature cited the synthesis of CuO/WO 3 and Pt/WO 3 nanocatalysts by means of flame assisted spray pyrolysis using 5 (NH 4 ) 2 OÁ12WO 3 Á5H 2 O with pure CuO or Pt nanoparticles as precursor. 9The approach followed here is to synthesize Cu/WO 3 nanoparticles using sol-gel precursors because chemical homogeneity of the various elements can be controlled down the atomic level. The facility used was a turnkey bench-top flame spray pyrolysis unit (NanoPowder Synthesizer nps10 TM by ...