TiO2/Gold nanocomposite as an extremely sensitive molecule sensor for NO2 detection: A DFT study

سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 412

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شناسه ملی سند علمی:

JR_JWENT-1-1_008

تاریخ نمایه سازی: 23 آبان 1397

چکیده مقاله:

First-principles calculations within density functional theory (DFT) have been performed to investigate the interactions of NO2 molecules with TiO2/Gold nanocomposites in order to completely exploit the adsorption properties of these nanostructures. Given the need to further comprehend the behavior of the NO2 molecules positioned between the TiO2 nanoparticle and Au monolayer, we have geometrically optimized the complex systems consisting of the NO2 molecule oriented at appropriate positions between the nanoparticle and Au monolayer. The structural properties such as bond lengths, bond angles, adsorption energies and Mulliken population analysis and the electronic properties including the density of states and molecular orbitals have been also analyzed in detail. The results indicate that the interaction between NO2 and undoped TiO2-N/Gold nanocomposites is stronger than that between gas molecules and N-doped TiO2/Gold nanocomposites, which reveals that the pristine nanocomposite can react with NO2 molecule more efficiently. Therefore, the obtained results also suggest a theoretical basis for the potential applications of TiO2/Gold nanocomposites in gas sensing, which could help in the developing of novel TiO2 based advanced sensor devices.

نویسندگان

Amirali Abbasi

Molecular Simulation laboratories (MSL) of Azarbaijan Shahid Madani University, Tabriz, Iran .Computational Nanomaterials Research Group (CNRG), Azarbaijan Shahid Madani University, Tabriz, Iran.Department of Chemistry, Faculty of Basic Sciences, Azarbaij

Jaber Jahanbin Sardroodi

Molecular Simulation laboratories (MSL) of Azarbaijan Shahid Madani University, Tabriz, Iran .Computational Nanomaterials Research Group (CNRG), Azarbaijan Shahid Madani University, Tabriz, Iran.Department of Chemistry, Faculty of Basic Sciences, Azarbaij

Alireza Rastkar Ebrahimzadeh

Molecular Simulation laboratories (MSL) of Azarbaijan Shahid Madani University, Tabriz, Iran.Computational Nanomaterials Research Group (CNRG), Azarbaijan Shahid Madani University, Tabriz, Iran.Department of Physics, Faculty of Basic Sciences, Azarbaijan