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Nagarajan V, Chandiramouli R. Sorption studies and removal of chlortetracycline and oxytetracycline using theta phosphorene nanoribbon – A DFT outlook. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117070] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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2
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Xie N, Wang H, You C. Role of oxygen functional groups in Pb 2+ adsorption from aqueous solution on carbonaceous surface: A density functional theory study. JOURNAL OF HAZARDOUS MATERIALS 2021; 405:124221. [PMID: 33082021 DOI: 10.1016/j.jhazmat.2020.124221] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/18/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
The adsorption mechanism of Pb2+ from aqueous solution on carbonaceous surface modified with oxygen functional groups was investigated by using density functional theory method. The zigzag model with seven benzene rings and armchair model with four benzene rings were used to simulate the different structures of carbonaceous surfaces. It was found that the adsorption of Pb2+ on the pure zigzag surface was chemisorption with the adsorption energy of - 306.26 to - 322.36 kJ/mol, while that on the armchair surface was physisorption with the adsorption energy of - 32.39 kJ/mol. The introduction of oxygen functional groups significantly enhanced the Pb2+ adsorption on the armchair surface. The physisorption changed to chemisorption after adding carboxyl, phenolic hydroxyl, or carbonyl functional group, indicating the stronger adsorption ability of the carbonaceous surfaces after modification. On the zigzag surface, however, the studied functional groups cannot benefit the Pb2+ adsorption. The results showed that the Pb2+ tended to adsorb on the carbon atoms instead of moving to the oxygen atoms from the introduced functional groups for adsorption, which suggests that the oxygen functional groups promoted the Pb2+ adsorption by increasing the activity of their neighboring carbon atoms.
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Affiliation(s)
- Ning Xie
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, PR China; Shanxi Research Institute for Clean Energy, Tsinghua University, Taiyuan, PR China
| | - Haiming Wang
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, PR China; Shanxi Research Institute for Clean Energy, Tsinghua University, Taiyuan, PR China.
| | - Changfu You
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, PR China; Shanxi Research Institute for Clean Energy, Tsinghua University, Taiyuan, PR China
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Nagarajan V, Sarvaka S, Chandiramouli R. Adsorption studies of nucleobases on ε-arsenene nanosheet based on first-principles research. J Mol Graph Model 2020; 103:107827. [PMID: 33370614 DOI: 10.1016/j.jmgm.2020.107827] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 11/18/2022]
Abstract
The electronic attributes and energetics of ε-arsenene nanosheet (ε-As) are explored with regard to the density functional theory basis. Initially, based on formation energy (-3.715 eV/atom), we ensured the structural firmness of ε-As. The ε-As is used as a base substrate to adsorb nucleobases viz., adenine (A), guanine (G), thymine (T), cytosine (C) & uracil (U). The surface adsorption of nucleobases on ε-As is analysed based on band structure, the density of states, adsorption energy, energy gap variation & charge transfer. Besides, we observed the exothermic nature of binding energy (ranging from -0.453 eV to -0.819 eV) upon nucleobase adsorption on ε-As. Also, the energy gap variation & charge transfer takes place owing to adsorption of nucleobases on the ε-As sheet. The present report reveals the adsorption of nucleobases on ε-arsenene nanosheet.
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Affiliation(s)
- V Nagarajan
- School of Electrical & Electronics Engineering, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, 613 401, India
| | - S Sarvaka
- School of Chemical & Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, 613 401, India
| | - R Chandiramouli
- School of Electrical & Electronics Engineering, SASTRA Deemed University, Tirumalaisamudram, Thanjavur, 613 401, India.
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Bhuvaneswari R, Nagarajan V, Chandiramouli R. Molecular interaction studies of cumene and toluene on δ-arsenene nanosheet – a first-principles outlook. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1800853] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- R. Bhuvaneswari
- School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur, India
| | - V. Nagarajan
- School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur, India
| | - R. Chandiramouli
- School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur, India
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Gecim G, Ozekmekci M, Fellah M. Ga and Ge-doped graphene structures: A DFT study of sensor applications for methanol. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.112828] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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6
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Uz M, Lentner MT, Jackson K, Donta MS, Jung J, Hondred J, Mach E, Claussen J, Mallapragada SK. Fabrication of Two-Dimensional and Three-Dimensional High-Resolution Binder-Free Graphene Circuits Using a Microfluidic Approach for Sensor Applications. ACS APPLIED MATERIALS & INTERFACES 2020; 12:13529-13539. [PMID: 32083838 DOI: 10.1021/acsami.9b23460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this study, a simple microfluidic method, which can be universally applied to different rigid or flexible substrates, was developed to fabricate high-resolution, conductive, two-dimensional and three-dimensional microstructured graphene-based electronic circuits. The method involves controlled and selective filling of microchannels on substrate surfaces with a conductive binder-free graphene nanoplatelet (GNP) solution. The ethanol-thermal reaction of GNP solution at low temperatures (∼75 °C) prior to microchannel filling (preheating) can further reduce the GNP andprovide a homogeneous GNP solution, which in turn enhances conductivity, reduces sheet resistance (∼0.05 kΩ sq-1), enables room-temperature fabrication, and eliminates harsh postprocessing, which makes this fabrication technique compatible with degradable substrates. This method can also be used in combination with 3D printing to fabricate 3D circuits. The feature sizes of the graphene patterns can range from a few micrometers (down to ∼15 μm in width and ∼5 μm in depth) to a few millimeters and use very small amounts of GNP solution (∼2.5 mg of graphene to obtain ∼0.1 kΩ sq-1 of sheet resistance for 1 cm2). This microfluidic approach can also be implemented using other conductive liquids, such as conductive graphene-silver solutions. This technology has the potential to pave the way for low-cost, disposable, and biodegradable circuits for a range of electronic applications including near-field communication antennas and pressure or strain sensors.
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Affiliation(s)
- Metin Uz
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Matthew T Lentner
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Kyle Jackson
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Maxsam S Donta
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Juhyung Jung
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - John Hondred
- Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Eric Mach
- Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Jonathan Claussen
- Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Surya K Mallapragada
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
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Interaction of trivalent arsenic on different topologies of Fe-doped graphene nanosheets at water environments: A computational study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111137] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Bhuvaneswari R, Maria JP, Nagarajan V, Chandiramouli R. DFT Study on the Interaction Properties of V-Series Nerve Agent Molecules on Novel Bismuthene Nanotubes. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-019-01181-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nagarajan V, Chandiramouli R. Adsorption studies of dimethyl and methyl-ethyl ester molecules on silicene nanoring: Application of DFT study. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2018.1470178] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- V. Nagarajan
- School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur, India
| | - R. Chandiramouli
- School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur, India
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Ghasemi A, Taghartapeh MR, Soltani A, Mahon PJ. Adsorption behavior of metformin drug on boron nitride fullerenes: Thermodynamics and DFT studies. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.124] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Shokuhi Rad A, Bagheri Novir S, Mohseni S, Ramezani Cherati N, Mirabi A. A DFT study of O2
and Cl2
adsorption onto Al12
N12
fullerene-like nanocluster. HETEROATOM CHEMISTRY 2017. [DOI: 10.1002/hc.21396] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ali Shokuhi Rad
- Department of Chemical Engineering; Qaemshahr Branch; Islamic Azad University; Qaemshahr Iran
| | - Samaneh Bagheri Novir
- Department of Pharmaceutical Chemistry; Faculty of Pharmaceutical Chemistry; Pharmaceutical Sciences Branch; Islamic Azad University; Tehran Iran
| | - Soheil Mohseni
- Department of Chemical Engineering; Qaemshahr Branch; Islamic Azad University; Qaemshahr Iran
| | - Nadia Ramezani Cherati
- Department of Chemical Engineering; Qaemshahr Branch; Islamic Azad University; Qaemshahr Iran
| | - Ali Mirabi
- Department of Chemistry; Qaemshahr Branch; Islamic Azad University; Qaemshahr Iran
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