Graphene aerogel for photocatalysis-assist uranium elimination under visible light and air atmosphere

Photo-induced removal of uranium under air without external photocatalysts

“…However, the formation mechanism of the uranium peroxide mineral under light irradiation is still indistinct. According to the above results and our previous study, 9,22 it was supposed that hydrogen peroxide could be produced during the photocatalytic process and then reacted with uranyl ions to form metastudtite. More experiments were conducted to prove the existence of a two-step reaction.…”

Extremely Efficient Uranium Removal from Aqueous Environments with Polyurea-Cross-Linked Alginate Aerogel Beads

“…Aerogel-derived adsorbents usually display high adsorption capacities for metal ions, including uranium, which is augmented by additional desirable attributes such as highly porous nanostructures, high specific surface areas, good mechanical properties, and surface functionality that can offer coordination sites. Aerogel materials that have shown adsorption of uranium­(VI) include inorganic (metal oxides, chalcogens, or carbon), organic (polymer or biopolymer), or hybrid (metal oxide, metal–organic framework, or graphene/polymer or biopolymer composites) materials. − Aerogels have also been used for the photocatalytic conversion of soluble uranium species to insoluble nanoparticles that can float on water and as hosts of reagents that leach out and cause precipitation of uranium from water …”

“…Aerogel materials that have shown adsorption of uranium(VI) include inorganic (metal oxides, chalcogens, or carbon), organic (polymer or biopolymer), or hybrid (metal oxide, metal−organic framework, or graphene/ polymer or biopolymer composites) materials. 6−34 Aerogels have also been used for the photocatalytic conversion of soluble uranium species to insoluble nanoparticles that can float on water 35 and as hosts of reagents that leach out and cause precipitation of uranium from water. 36 Recently, a new class of aerogel materials was introduced, referred to as polyurea (PUA)-cross-linked biopolymer (Xbiopolymer) aerogels.…”

2D/2D g-C3N4/1T-MoS2 Nanohybrids as Schottky Heterojunction Photocatalysts for Nuclear Wastewater Pretreatment

“…As an increasingly mature application, nuclear power technology can even completely replace fossil fuels to meet future energy needs. − However, a large amount of nuclear wastewater will be generated during the nuclear fuel cycle process, including nuclear facility decommissioning, equipment maintenance, accident treatment, etc. , Researchers have developed various methods to remove or extract uranium ions in wastewater. − Unfortunately, this type of wastewater contains not only radioactive elements but also various organic substances, including alkyl glycosides, xanthan gum, oxalic acid, citric acid, and tannic acid (TA) . In addition, the industrial electroplating wastewater was also found to contain TA .…”