Adsorption mechanism of AsH3 pollutant on metal-functionalized coronene C24H12-X (X = Mg, Al, K) quantum dots

Agwamba, Ernest C.; Udoikono, Akaninyene D.; Louis, Hitler; Mathias, Gideon E.; Benjamin, Innocent; Ikenyirimba, Onyinye J.; Etiese, Daniel; Ahuekwe, Eze Frank; Manicum, Amanda-Lee E.

doi:10.1016/j.chphi.2023.100224

Cited by 9 publications

(1 citation statement)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study we have carefully made optimum use of the QTAIM theory in agreement with the idea of Bader 63 , to anatomize the various features of the intermolecular hydrogen bond critical points in the studied system (DDVP). In QTAIM analysis, it is required to distinguish the following parameters the density of all electrons ρ(r), Laplacian of electron density 2 (r), Lagrangian kinetic energy G(r), Hamiltonian kinetic energy K(r), potential electron energy density V(r), total electron energy density H(r), electron localization function (ELF), Eigen values (λ 1 , λ 2 , λ 3 ) of hessian 64 , 65 . The Laplacian electron density 2 (r) and total electron energy density H(r) show the covalent interactions and their nature.…”

Section: Resultsmentioning

confidence: 99%

Metals (Ga, In) decorated fullerenes as nanosensors for the adsorption of 2,2-dichlorovinyldimethylphosphate agrochemical based pollutant

Akpe

Okon

Louis

et al. 2023

Sci Rep

Self Cite

View full text Add to dashboard Cite

Owing to the fact that the use of 2,2-dichlorovinyldimethylphosphate (DDVP) as an agrochemical has become a matter of concern due to its persistence and potential harm to the environment and human health. Detecting and addressing DDVP contamination is crucial to protect human health and mitigate ecological impacts. Hence, this study focuses on harnessing the properties of fullerene (C60) carbon materials, known for their biological activities and high importance, to develop an efficient sensor for DDVP. Additionally, the sensor's performance is enhanced by doping it with gallium (Ga) and indium (In) metals to investigate the sensing and trapping capabilities of DDVP molecules. The detection of DDVP is carefully examined using first-principles density functional theory (DFT) at the Def2svp/B3LYP-GD3(BJ) level of theory, specifically analyzing the adsorption of DDVP at the chlorine (Cl) and oxygen (O) sites. The adsorption energies at the Cl site were determined as − 57.894 kJ/mol, − 78.107 kJ/mol, and − 99.901 kJ/mol for Cl_DDVP@C60, Cl_DDVP@Ga@C60, and Cl_DDVP@In@C60 interactions, respectively. At the O site, the adsorption energies were found to be − 54.400 kJ/mol, − 114.060 kJ/mol, and − 114.056 kJ/mol for O_DDVP@C60, O_DDVP@Ga@C60, and O_DDVP@In@C60, respectively. The adsorption energy analysis highlights the chemisorption strength between the surfaces and the DDVP molecule at the Cl and O sites of adsorption, indicating that the O adsorption site exhibits higher adsorption energy, which is more favorable according to the thermodynamics analysis. Thermodynamic parameters (∆H and ∆G) obtained from this adsorption site suggest considerable stability and indicate a spontaneous reaction in the order O_DDVP@Ga@C60 > O_DDVP@In@C60 > O_DDVP@C60. These findings demonstrate that the metal-decorated surfaces adsorbed on the oxygen (O) site of the biomolecule offer high sensitivity for detecting the organophosphate molecule DDVP.

show abstract