Variable energy gap of SiCN nanopowders

Dohčević‐Mitrović, Z.; Milutinović, A.; Popović, Dušanka; Vasiljević-Radović, Dana; Popović, Zoran V.

doi:10.1007/s00339-006-3598-9

Cited by 4 publications

(1 citation statement)

References 32 publications

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“…2. The absorption edge of this SiC powder starts at about 550 nm, with the band gap estimated at about 2.3 eV [12]. In fact, the green color indicates that it can absorb visible light.…”

Section: Characterization Resultsmentioning

confidence: 98%

Photocatalytic hydrogen evolution from water on SiC under visible light irradiation

Gao

Wang

2007

React Kinet Catal Lett

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A kind of green SiC fine powder was characterized by XRD and UV-Vis diffuse reflectance, and studied in the photocatalytic splitting of water. The results showed that the green SiC fine powder can absorb visible light and split water with the formation of hydrogen under visible light irradiation. The activity is affected significantly by the initial pH of solutions and the types of cheap reagents, where the addition of OH -or S 2-leads to a remarkable increase in the activity.

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“…2. The absorption edge of this SiC powder starts at about 550 nm, with the band gap estimated at about 2.3 eV [12]. In fact, the green color indicates that it can absorb visible light.…”

Section: Characterization Resultsmentioning

confidence: 98%

Photocatalytic hydrogen evolution from water on SiC under visible light irradiation

Gao

Wang

2007

React Kinet Catal Lett

View full text Add to dashboard Cite

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Laser pyrolysis in papers and patents

2021

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This paper presents a critical review of laser pyrolysis. Although this technology is almost 60 years old, in literature many researchers, both from academia and industry, are still developing and improving it. On the contrary industrial applications are struggling to take off, if not in very restricted areas, although the technology has undoubted advantages that justify future development. The aim of this work consists in analysing a representative pool of scientific papers (230) and patents (121), from the last 20 years, to have an overview about the evolution of the method and try to understand the efforts spent to improve this technology effectively in academia and in industry. This study is important to provide a complete review about the argument, still missing in the literature. The objective is to provide an overview sufficiently broad and representative in the sources and to capture all the main ways in which laser pyrolysis has been used and with what distribution. The main focuses of the study are the analyses of the functions carried out by laser technologies, the application fields, and the types of used laser (i.e. models, power and fluence). Among the main results, the study showed that the main use of laser pyrolysis is to produce nanoparticles and coatings, the main materials worked by laser pyrolysis are silicon and carbon dioxide and the main searched properties in the products of laser pyrolysis are catalysts activity and electrical conductivity. CO2 lasers are the most used and the have high versatility compared to others. In conclusion, the study showed that laser pyrolysis is a consolidated technology within its main application fields (nanoparticles and coatings) for several years. Within this context, the technology has been developed on very different sizes and processes, obtaining a very wide range of results. Finally, these results may also have stimulated new areas of experimentation that emerged mainly in recent years and which concern biomedical applications, additive manufacturing, and waste disposal. Graphical abstract

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