Ultra-high-efficiency capture of lead ions over acetylenic bond-rich graphdiyne adsorbent in aqueous solution

Abstract

A satisfactory material with high adsorption capacity is urgently needed to solve the serious problem of environment and human health caused by lead pollution. Herein, hydrogen-substituted graphdiyne (HsGDY) was successfully fabricated and employed to remove lead ions from sewage and lead-containing blood. The as-prepared HsGDY exhibits the highest adsorption capacity of lead among the reported materials with a maximum adsorption capacity of 2,390 mg/g, i.e., ~five times larger than that of graphdiyne (GDY). The distinguished hexagonal hole and stack mode of HsGDY allows the adsorption of more lead via its inner side adsorption mode in one single unit space. In addition, the Pb 6s and H 1s hybridization promotes the strong bonding of lead atom adsorbed at the acetylenic bond of HsGDY, contributing to the high adsorption capacity. HsGDY can be easily regenerated by acid treatment and showed excellent regeneration ability and reliability after six adsorption-regeneration cycles. Langmuir isotherm model, pseudo second order, and density functional theory (DFT) demonstrated that the lead adsorption process in HsGDY is monolayer chemisorption. Furthermore, the HsGDY-based portable filter can handle 1,000 μg/L lead-containing aqueous solution up to 1,000 mL, which is nearly 6.67 times that of commercial activated carbon particles. And, the HsGDY shows good biocompatibility and excellent removal efficiency to 100 μg/L blood lead, which is 1.7 times higher than that of GDY. These findings suggest that HsGDY could be a promising adsorbent for practical lead and other heavy metal removal.

Corrosion Control by Carbon-Based Nanomaterials: A Review

“…Graphdiyne (GDY), a two-dimensional planar network formed by the connection of acetylene bonds (sp-C) and benzene rings (sp 2 -C), is considered to be a new type of carbon material with almost perfect structure. − The special arrangement of sp/sp 2 hybrid carbon atoms in GDY endows it with unique chemistry, electronic structure, and excellent performance. − GDY not only has good hydrophobicity but also has excellent stability in acidic and alkaline environments . In addition, due to the excellent in-plane wave velocity generated by the benzene ring and the acetylene bond between the benzene rings, GDY has excellent impact resistance and can grow a strong GDY protective layer in situ on the metal surface, preventing corrosion phenomena from occurring when the corrosive medium comes into contact with the metal surface.…”

Insights into efficient bacterial inactivation over nano Ag/graphdiyne: dual activation of molecular oxygen and water molecules

“…The unique molecular hybrid structure endows it with high conjugation, superior charge transfer, and tunable electronic properties. 17–24 These features endow GDY with enormous application value in constructing stable metal nanoparticle composite materials. 25–32 Density functional theory and molecular dynamics simulation studies show that GDY is not only an effective substrate to support stable Ag clusters, but also has the ability to regulate the electronic structures of Ag clusters.…”

Synthesis of Defective Wheel‐Shaped Nanographdiynes

“…[1][2][3][4][5][6][7][8] In the next 13 years, the research results related to graphdiyne have increased year by year. Compared with other all-carbon materials, graphdiyne with advantages in controllable growth [2,6,[9][10][11][12] exhibits great potential in promoting innovative development in many fields such as catalysis, [4,[13][14][15][16][17][18][19][20][21][22][23][24][25] photoelectric conversion, [13,15,[26][27][28][29][30] energy storage, [5,[31][32][33][34][35][36][37] separation, [38][39][40] wearable electronics [41][42] and other fields. [43]…”