rGO-based covalent organic framework hydrogel for synergistically enhance uranium capture capacity through photothermal desalination

Recent developments of hydrogel based solar water purification technology

“…Carbon-based materials have been used as solar absorbers in various studies in recent years, owing to their excellent light absorption over a broad spectrum, ease of preparation, abundance and low cost. Carbon-based materials include activated carbon, 83–86 polymer 76,87–90 or biomass 82,91–95 derived carbide, carbon black 96–101 and various amorphous carbon materials and highly graphitized carbon materials, such as graphene, 56,59,63,74,77,102–122 carbon nanotubes (CNTs) 27,123–130 and their derivatives.…”

“…137 Recent research on conjugated polymer solar absorbers has been extended to polyaniline (PANI), 149,150 poly(3,4-ethylene dioxythiophene) (PEDOT), 151,152 polydopamine (PDA), 66,153–156 perovskite hole layer material DPP-2T, 157 and covalent organic frameworks (COFs). 122,158 Furthermore, conjugated copolymer materials such as poly(aniline- co -pyrrole) 34 have also shown up in recent research, proving a novel approach for solar water purification by combining the advantages of two polymers.…”

“…uranium. 122,128,158 Besides, the application of this technology to purify specific wastewater containing nanoparticles, 139 acidic, 174 alkaline, 94 and low-boiling-point contaminants, 177 and organic dyes 144,156 is also under development. Furthermore, additional functions, such as electricity generation, 51,88,101,125,127,129,138,185 fog collection, 146,186,187 oil/water separation, 147 water disinfection, 184 sensing, 58 and photo degradability, 65,80,188 have also been integrated into solar water purification.…”

The Efficient and Convenient Extracting Uranium from Water by a Uranyl-Ion Affine Microgel Container

“…Furthermore, most adsorbents are composed of an organic skeleton, which greatly reduces their water compatibility and limits their adsorption efficiency and selectivity in aqueous solution [26]. For uranium ions in water, the hydrophobic materials do not seem to be the ideal absorbents [27,28]. Therefore, it is essential to develop a simple strategy to obtain water compatible adsorbents for selective uranium adsorption [29].…”

Theory-Guided Design of a Method to Obtain Competitive Balance between U(VI) Adsorption and Swaying Zwitterion-Induced Fouling Resistance on Natural Hemp Fibers

“…Fortunately, representing an unconventional uranium source, the oceans contain about 4.5 billion metric tons of U(VI) [ 4 , 5 ]. To extract U(VI) from seawater, metal–organic frameworks, covalent organic frameworks or biochar, as well as other materials, have been designed and prepared with excellent performance [ 6 , 7 , 8 , 9 , 10 ]. However, the application of the above-mentioned materials is limited by their small size, which makes their use in the sea a challenge [ 11 , 12 ].…”