Peoples' Friendship University of Russia

About: Peoples' Friendship University of Russia is a education organization based out in Moscow, Russia. It is known for research contribution in the topics: Catalysis & Population. The organization has 5667 authors who have published 7038 publications receiving 39795 citations. The organization is also known as: Peoples' Friendship University of Russia (RUDN University) & Peoples’ Friendship University of Russia (RUDN University).

Nanostructured materials for photocatalysis

Abstract: Photocatalysis is a green technology which converts abundantly available photonic energy into useful chemical energy. With a rapid rise of flow photoreactors in the last decade, the design and development of novel semiconductor photocatalysts is happening at a blistering rate. Currently, developed synthetic approaches have allowed the design of diverse modified/unmodified semiconductor materials exhibiting enhanced performances in heterogeneous photocatalysis. In this review, we have classified the so far reported highly efficient modified/unmodified semiconductor photocatalysts into four different categories based on the elemental composition, band gap engineering and charge carrier migration mechanism in composite photocatalysts. The recent synthetic developments are reported for each novel semiconductor photocatalyst within the four different categories, namely: pure semiconductors, solid solutions, type-II heterojunction nanocomposites and Z-scheme. The motivation behind the synthetic upgrading of modified/unmodified (pure) semiconductor photocatalysts along with their particular photochemical applications and photoreactor systems have been thoroughly reviewed.

Recent catalytic routes for the preparation and the upgrading of biomass derived furfural and 5-hydroxymethylfurfural

Abstract: Furans represent one of the most important classes of intermediates in the conversion of non-edible lignocellulosic biomass into bio-based chemicals and fuels. At present, bio-furan derivatives are generally obtained from cellulose and hemicellulose fractions of biomass via the acid-catalyzed dehydration of their relative C6-C5 sugars and then converted into a wide range of products. Furfural (FUR) and 5-hydroxymethylfurfural (HMF) are surely the most used furan-based feedstocks since their chemical structure allows the preparation of various high-value-added chemicals. Among several well-established catalytic approaches, hydrogenation and oxygenation processes have been efficiently adopted for upgrading furans; however, harsh reaction conditions are generally required. In this review, we aim to discuss the conversion of biomass derived FUR and HMF through unconventional (transfer hydrogenation, photocatalytic and electrocatalytic) catalytic processes promoted by heterogeneous catalytic systems. The reaction conditions adopted, the chemical nature and the physico-chemical properties of the most employed heterogeneous systems in enhancing the catalytic activity and in driving the selectivity to desired products are presented and compared. At the same time, the latest results in the production of FUR and HMF through novel environmental friendly processes starting from lignocellulose as well as from wastes and by-products obtained in the processing of biomass are also overviewed.

Theorizing from the Borders Shifting to Geo- and Body-Politics of Knowledge

Abstract: ‘Borders’ will be in the twenty-first century what ‘frontiers’ where in the nineteenth. Frontiers were conceived as the line indicating the last point in the relentless march of civilization. On the one side of the frontiers was civilization; on the other, nothing; just barbarism or emptiness. The march of civilization and the idea of the frontiers created a geographic and bodygraphic divide. Certain areas of the planet were designated as the location of the barbarians, and since the eighteenth century, of the primitives. In one stroke, bodies were classified and assigned a given place on the planet. But who had the authority to enact such a classification, and what was the logic of that classification? Furthermore, the classification of the world by region, and the link established between regions and people inhabiting them, was parallel to the march of civilization and companions of it: on the other side of the epistemic frontiers, people do not think or theorize; hence, one of the reasons they were con...